TY  - CONF
AU  - Čebela, Maria
AU  - Reddy, Priyanka
AU  - Čakar, Uroš
AU  - Labus, Nebojša
AU  - Lojpur, Vesna
AU  - Dodevski, Vladimir
AU  - Rosić, Milena
PY  - 2023
UR  - https://dais.sanu.ac.rs/123456789/14660
AB  - Iron(III) titanates are attracting rapidly growing interest as very promising candidates for applications in solar energy and optoelectronics because they contain earth-rich elements. Potentially, Fe2TiO5 is a thermoelectric material. We used a Vibrating Sample Magnetometer and Superconducting Quantum Interferometer Device Magnetometer to study the magnetic properties of the pseudobrookite material Fe2TiO5. The material was synthesized by the sol-gel method. The structural parameters of the synthesized samples were investigated by X-ray analysis. The diffractogram was refined with the help of Rietveld refinement on FullProf Suite. Temperature-dependent ZFC and FC magnetization was measured on SQUID for lower temperature down to 2 K and on VSM for higher temperatures up to 1000 K. A transition was observed at 815 K with a separation between the ZFC and FC curves. Parallelly the bifurcation in the isothermal hysteresis measurements indicates that the system exhibits dominant canted AFM (or weak FM) with a small amount of spin glass. The small value of the moment was also pointing towards the canted AFM ordering. The size and morphology of the particles was determined using transmission electron microscopy (TEM) and scanning electron microscopy (SEM).
PB  - Belgrade : Institut za multidisciplinarna istraživanja
C3  - Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia
T1  - Synthesis, structure and magnetic properties of Fe2TiO5
UR  - https://hdl.handle.net/21.15107/rcub_dais_14660
ER  - 

@conference{
author = "Čebela, Maria and Reddy, Priyanka and Čakar, Uroš and Labus, Nebojša and Lojpur, Vesna and Dodevski, Vladimir and Rosić, Milena",
year = "2023",
abstract = "Iron(III) titanates are attracting rapidly growing interest as very promising candidates for applications in solar energy and optoelectronics because they contain earth-rich elements. Potentially, Fe2TiO5 is a thermoelectric material. We used a Vibrating Sample Magnetometer and Superconducting Quantum Interferometer Device Magnetometer to study the magnetic properties of the pseudobrookite material Fe2TiO5. The material was synthesized by the sol-gel method. The structural parameters of the synthesized samples were investigated by X-ray analysis. The diffractogram was refined with the help of Rietveld refinement on FullProf Suite. Temperature-dependent ZFC and FC magnetization was measured on SQUID for lower temperature down to 2 K and on VSM for higher temperatures up to 1000 K. A transition was observed at 815 K with a separation between the ZFC and FC curves. Parallelly the bifurcation in the isothermal hysteresis measurements indicates that the system exhibits dominant canted AFM (or weak FM) with a small amount of spin glass. The small value of the moment was also pointing towards the canted AFM ordering. The size and morphology of the particles was determined using transmission electron microscopy (TEM) and scanning electron microscopy (SEM).",
publisher = "Belgrade : Institut za multidisciplinarna istraživanja",
journal = "Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia",
title = "Synthesis, structure and magnetic properties of Fe2TiO5",
url = "https://hdl.handle.net/21.15107/rcub_dais_14660"
}

Čebela, M., Reddy, P., Čakar, U., Labus, N., Lojpur, V., Dodevski, V.,& Rosić, M.. (2023). Synthesis, structure and magnetic properties of Fe2TiO5. in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia
Belgrade : Institut za multidisciplinarna istraživanja..
https://hdl.handle.net/21.15107/rcub_dais_14660

Čebela M, Reddy P, Čakar U, Labus N, Lojpur V, Dodevski V, Rosić M. Synthesis, structure and magnetic properties of Fe2TiO5. in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia. 2023;.
https://hdl.handle.net/21.15107/rcub_dais_14660 .

Čebela, Maria, Reddy, Priyanka, Čakar, Uroš, Labus, Nebojša, Lojpur, Vesna, Dodevski, Vladimir, Rosić, Milena, "Synthesis, structure and magnetic properties of Fe2TiO5" in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia (2023),
https://hdl.handle.net/21.15107/rcub_dais_14660 .

TY  - CONF
AU  - Rosić, Milena
AU  - Čebela, Maria
AU  - Labus, Nebojša
AU  - Radović, Marko
AU  - Aškrabić, Sonja
AU  - Dohčević-Mitrović, Zorana
AU  - Stojmenović, Marija
PY  - 2023
UR  - https://dais.sanu.ac.rs/123456789/14661
AB  - Ca1-xGdxMnO3 (x = 0.05–0.20) nanostructured perovskites were successfully synthesized by modified glycine nitrate procedure (MGNP). Temperature intervals of sintering and phase transition during heating were revealed during dilatometric measurements. In order to determine the band gap values of the tested samples, ellipsometric measurements were performed in the UV-VIS spectral range. Decrease of band gap values with increase of Gd dopant content was attributed to n-type doping and upward shifting of the Fermi level in the conduction band. The investigation of the crystal structure and phase content of nanocrystalline Ca1- xGdxMnO3 powders was continued using micro-Raman spectroscopy. The electrical conductivity of Gd3+ doped sintered samples CaMnO3 as a function of temperature was measured by electrochemical impedance spectroscopy (EIS), in the temperature range of 400–700 °C. The corresponding activation energies of conductivity, measured in the investigated temperature range, were also discussed. The obtained research results showed that the highest hardness values of 7.58 GPa respectively, were achieved and that these nanostructured materials can be used as a high-density ceramic material for various industrial applications.
PB  - Belgrade : Institut za multidisciplinarna istraživanja
C3  - Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia
T1  - Influence of Gd-doping on electrical properties in Ca1-xGdxMnO3 (x=0.05, 0.1, 0.15, 0.2) perovskites
UR  - https://hdl.handle.net/21.15107/rcub_dais_14661
ER  - 

@conference{
author = "Rosić, Milena and Čebela, Maria and Labus, Nebojša and Radović, Marko and Aškrabić, Sonja and Dohčević-Mitrović, Zorana and Stojmenović, Marija",
year = "2023",
abstract = "Ca1-xGdxMnO3 (x = 0.05–0.20) nanostructured perovskites were successfully synthesized by modified glycine nitrate procedure (MGNP). Temperature intervals of sintering and phase transition during heating were revealed during dilatometric measurements. In order to determine the band gap values of the tested samples, ellipsometric measurements were performed in the UV-VIS spectral range. Decrease of band gap values with increase of Gd dopant content was attributed to n-type doping and upward shifting of the Fermi level in the conduction band. The investigation of the crystal structure and phase content of nanocrystalline Ca1- xGdxMnO3 powders was continued using micro-Raman spectroscopy. The electrical conductivity of Gd3+ doped sintered samples CaMnO3 as a function of temperature was measured by electrochemical impedance spectroscopy (EIS), in the temperature range of 400–700 °C. The corresponding activation energies of conductivity, measured in the investigated temperature range, were also discussed. The obtained research results showed that the highest hardness values of 7.58 GPa respectively, were achieved and that these nanostructured materials can be used as a high-density ceramic material for various industrial applications.",
publisher = "Belgrade : Institut za multidisciplinarna istraživanja",
journal = "Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia",
title = "Influence of Gd-doping on electrical properties in Ca1-xGdxMnO3 (x=0.05, 0.1, 0.15, 0.2) perovskites",
url = "https://hdl.handle.net/21.15107/rcub_dais_14661"
}

Rosić, M., Čebela, M., Labus, N., Radović, M., Aškrabić, S., Dohčević-Mitrović, Z.,& Stojmenović, M.. (2023). Influence of Gd-doping on electrical properties in Ca1-xGdxMnO3 (x=0.05, 0.1, 0.15, 0.2) perovskites. in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia
Belgrade : Institut za multidisciplinarna istraživanja..
https://hdl.handle.net/21.15107/rcub_dais_14661

Rosić M, Čebela M, Labus N, Radović M, Aškrabić S, Dohčević-Mitrović Z, Stojmenović M. Influence of Gd-doping on electrical properties in Ca1-xGdxMnO3 (x=0.05, 0.1, 0.15, 0.2) perovskites. in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia. 2023;.
https://hdl.handle.net/21.15107/rcub_dais_14661 .

Rosić, Milena, Čebela, Maria, Labus, Nebojša, Radović, Marko, Aškrabić, Sonja, Dohčević-Mitrović, Zorana, Stojmenović, Marija, "Influence of Gd-doping on electrical properties in Ca1-xGdxMnO3 (x=0.05, 0.1, 0.15, 0.2) perovskites" in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia (2023),
https://hdl.handle.net/21.15107/rcub_dais_14661 .

TY  - CONF
AU  - Labus, Nebojša
AU  - Marković, Smilja
AU  - Nikolić, Maria Vesna
AU  - Rosić, Milena
AU  - Matijašević, Srđan
PY  - 2022
UR  - https://dais.sanu.ac.rs/123456789/13641
AB  - Sintering and phase transition are often superimposed at dimensional change diagram recorded during heating. Phase transition kinetic is thus hard to deconvolute due to the superposition of the sintering and phase transition dimensional change phenomena. Metastabile perovskite phase ZnTiO3has transition to stabile spinel Zn2TiO4which occurs at 945oC with high kinetic rate. Nano powder with 40 nm particle diameter was pressed uniaxially at 200 MPa pressure without binder to form compact that will be consequently sintered. Dimensional change during heating was monitored using dilatometric thermo-mechanical analyzer TMA model SETSYS Evolution. Lever`s rule was used to calculate amount of the emerging phase during phase transition. The compacted specimens were treated on the nonisothermal schedule up to 1050oC.Sintering phenomenon of the ZnTiO3 nanopowder compact was also recorded up to 900oCwith isothermal holding of 25 minutes where phase transition was avoided due to lower temperature and isothermal holding. Second run heating of the obtained sintered specimens were recorded with the heating schedule of non-isothermal heating up to 1050oC. Kinetic of the phase transition was obtained from dilatograms recorded during sintering and from bulk on the second run heating. Furthermore, phase transition kinetics was obtained by subsequent data subtraction of the sintering curves without phase transition from the dilatation sintering curves containing phase transition. In such a manner complex kinetics of phenomena such as sintering, linear expansion and phase transition recorded as dimensional change during heating brings the recognition of their mutual interconnected relations. Also application of these mathematical operations on dilatometric data leads to the established procedure for the sintering and phase transition data treatment.
PB  - Belgrade : ETRAN Society
PB  - Belgrade : Academic Mind
C3  - Зборник радова / IX међународне конференције ИцЕТРАН и LXVI конференције ЕТРАН, Нови Пазар 6-9. јуна 2022. године = Proceedings / IX International Conference IcETRAN and LXVI ETRAN Conference, Novi Pazar, Serbia, 6-9, June, 2022
T1  - Sintering and Phase Transition of the ZnTiO3 Nano Powder Dilatometric Data Deconvolution
SP  - 479
EP  - 486
UR  - https://hdl.handle.net/21.15107/rcub_dais_13641
ER  - 

@conference{
author = "Labus, Nebojša and Marković, Smilja and Nikolić, Maria Vesna and Rosić, Milena and Matijašević, Srđan",
year = "2022",
abstract = "Sintering and phase transition are often superimposed at dimensional change diagram recorded during heating. Phase transition kinetic is thus hard to deconvolute due to the superposition of the sintering and phase transition dimensional change phenomena. Metastabile perovskite phase ZnTiO3has transition to stabile spinel Zn2TiO4which occurs at 945oC with high kinetic rate. Nano powder with 40 nm particle diameter was pressed uniaxially at 200 MPa pressure without binder to form compact that will be consequently sintered. Dimensional change during heating was monitored using dilatometric thermo-mechanical analyzer TMA model SETSYS Evolution. Lever`s rule was used to calculate amount of the emerging phase during phase transition. The compacted specimens were treated on the nonisothermal schedule up to 1050oC.Sintering phenomenon of the ZnTiO3 nanopowder compact was also recorded up to 900oCwith isothermal holding of 25 minutes where phase transition was avoided due to lower temperature and isothermal holding. Second run heating of the obtained sintered specimens were recorded with the heating schedule of non-isothermal heating up to 1050oC. Kinetic of the phase transition was obtained from dilatograms recorded during sintering and from bulk on the second run heating. Furthermore, phase transition kinetics was obtained by subsequent data subtraction of the sintering curves without phase transition from the dilatation sintering curves containing phase transition. In such a manner complex kinetics of phenomena such as sintering, linear expansion and phase transition recorded as dimensional change during heating brings the recognition of their mutual interconnected relations. Also application of these mathematical operations on dilatometric data leads to the established procedure for the sintering and phase transition data treatment.",
publisher = "Belgrade : ETRAN Society, Belgrade : Academic Mind",
journal = "Зборник радова / IX међународне конференције ИцЕТРАН и LXVI конференције ЕТРАН, Нови Пазар 6-9. јуна 2022. године = Proceedings / IX International Conference IcETRAN and LXVI ETRAN Conference, Novi Pazar, Serbia, 6-9, June, 2022",
title = "Sintering and Phase Transition of the ZnTiO3 Nano Powder Dilatometric Data Deconvolution",
pages = "479-486",
url = "https://hdl.handle.net/21.15107/rcub_dais_13641"
}

Labus, N., Marković, S., Nikolić, M. V., Rosić, M.,& Matijašević, S.. (2022). Sintering and Phase Transition of the ZnTiO3 Nano Powder Dilatometric Data Deconvolution. in Зборник радова / IX међународне конференције ИцЕТРАН и LXVI конференције ЕТРАН, Нови Пазар 6-9. јуна 2022. године = Proceedings / IX International Conference IcETRAN and LXVI ETRAN Conference, Novi Pazar, Serbia, 6-9, June, 2022
Belgrade : ETRAN Society., 479-486.
https://hdl.handle.net/21.15107/rcub_dais_13641

Labus N, Marković S, Nikolić MV, Rosić M, Matijašević S. Sintering and Phase Transition of the ZnTiO3 Nano Powder Dilatometric Data Deconvolution. in Зборник радова / IX међународне конференције ИцЕТРАН и LXVI конференције ЕТРАН, Нови Пазар 6-9. јуна 2022. године = Proceedings / IX International Conference IcETRAN and LXVI ETRAN Conference, Novi Pazar, Serbia, 6-9, June, 2022. 2022;:479-486.
https://hdl.handle.net/21.15107/rcub_dais_13641 .

Labus, Nebojša, Marković, Smilja, Nikolić, Maria Vesna, Rosić, Milena, Matijašević, Srđan, "Sintering and Phase Transition of the ZnTiO3 Nano Powder Dilatometric Data Deconvolution" in Зборник радова / IX међународне конференције ИцЕТРАН и LXVI конференције ЕТРАН, Нови Пазар 6-9. јуна 2022. године = Proceedings / IX International Conference IcETRAN and LXVI ETRAN Conference, Novi Pazar, Serbia, 6-9, June, 2022 (2022):479-486,
https://hdl.handle.net/21.15107/rcub_dais_13641 .

TY  - CONF
AU  - Rosić, Milena
AU  - Čebela, Maria
AU  - Jordanov, Dragana
AU  - Labus, Nebojša
AU  - Vasić Jovev, Marija
AU  - Ljupković, Radomir
AU  - Zarubica, Aleksandra
PY  - 2022
UR  - https://dais.sanu.ac.rs/123456789/13632
AB  - Nanosized CoMoO4 solid solution was successfully synthesized at room temperature using simple and fast Self Propagating Room Temperature procedure (SPRT). The structural, textural, morphological and surface characteristics of the nanosized CoMoO4 were examined in detail by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectra, Field emission scanning electron microscopy (FESEM), and nitrogen sorption method. X-ray powder diffraction (XRPD) reflected the presence of two different phases that are in the same space group. The α-CoMoO4 and the β-CoMoO4 modification crystallizes in the monoclinic space group C2/m, No.12, but the β-phase clearly distinct from the α-phase due to the tetrahedral coordination of the Mo6+ ions. Adsorption tests were studied over CoMoO4 nanopowders under different experimental conditions (material dosage, initial concentration of pollutant textile dye, etc). The obtained results showed acceptable sorption characteristics of the material.
PB  - Belgrade : Institut za multidisciplinarna istraživanja
C3  - Programme ; and the Book of Abstracts / 6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia
T1  - Investigating sorptive aspects of CoMoO4 nanopowders synthesized by sprt method
SP  - 55
EP  - 56
UR  - https://hdl.handle.net/21.15107/rcub_dais_13632
ER  - 

@conference{
author = "Rosić, Milena and Čebela, Maria and Jordanov, Dragana and Labus, Nebojša and Vasić Jovev, Marija and Ljupković, Radomir and Zarubica, Aleksandra",
year = "2022",
abstract = "Nanosized CoMoO4 solid solution was successfully synthesized at room temperature using simple and fast Self Propagating Room Temperature procedure (SPRT). The structural, textural, morphological and surface characteristics of the nanosized CoMoO4 were examined in detail by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectra, Field emission scanning electron microscopy (FESEM), and nitrogen sorption method. X-ray powder diffraction (XRPD) reflected the presence of two different phases that are in the same space group. The α-CoMoO4 and the β-CoMoO4 modification crystallizes in the monoclinic space group C2/m, No.12, but the β-phase clearly distinct from the α-phase due to the tetrahedral coordination of the Mo6+ ions. Adsorption tests were studied over CoMoO4 nanopowders under different experimental conditions (material dosage, initial concentration of pollutant textile dye, etc). The obtained results showed acceptable sorption characteristics of the material.",
publisher = "Belgrade : Institut za multidisciplinarna istraživanja",
journal = "Programme ; and the Book of Abstracts / 6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia",
title = "Investigating sorptive aspects of CoMoO4 nanopowders synthesized by sprt method",
pages = "55-56",
url = "https://hdl.handle.net/21.15107/rcub_dais_13632"
}

Rosić, M., Čebela, M., Jordanov, D., Labus, N., Vasić Jovev, M., Ljupković, R.,& Zarubica, A.. (2022). Investigating sorptive aspects of CoMoO4 nanopowders synthesized by sprt method. in Programme ; and the Book of Abstracts / 6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia
Belgrade : Institut za multidisciplinarna istraživanja., 55-56.
https://hdl.handle.net/21.15107/rcub_dais_13632

Rosić M, Čebela M, Jordanov D, Labus N, Vasić Jovev M, Ljupković R, Zarubica A. Investigating sorptive aspects of CoMoO4 nanopowders synthesized by sprt method. in Programme ; and the Book of Abstracts / 6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia. 2022;:55-56.
https://hdl.handle.net/21.15107/rcub_dais_13632 .

Rosić, Milena, Čebela, Maria, Jordanov, Dragana, Labus, Nebojša, Vasić Jovev, Marija, Ljupković, Radomir, Zarubica, Aleksandra, "Investigating sorptive aspects of CoMoO4 nanopowders synthesized by sprt method" in Programme ; and the Book of Abstracts / 6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia (2022):55-56,
https://hdl.handle.net/21.15107/rcub_dais_13632 .

TY  - CONF
AU  - Labus, Nebojša
AU  - Gulicovski, Jelena
AU  - Čebela, Maria
AU  - Rosić, Milena
PY  - 2022
UR  - https://dais.sanu.ac.rs/123456789/13634
AB  - Nanocrystalline powders of Ca1-xGdxMnO3 (x=0.05, 0.1, 0.15, and 0.2) have been synthesized by the modified glycine nitrate procedure and pressed into pellets that served as green bodies for a systematic investigation on their structural and microstructural properties [1]. Dilatometric measurements were performed in order to confirm the optimal sintering temperature. Dilatometric curves, besides sintering, are recording superimposed phase transition and linear expansion. Using a dilatometric curve, three temperatures were determined at which the examined sample shows significant changes. At 1055 °C–1194 °C certain second order phase transition is evident, at 1365 °C–1409 °C intensive nitrogen oxide extrusion, and in duration of 86 min at 877 °C heating ramp thorough isothermal holding at 1410 °C until 158 min cooling schedule at 1331 °C sintering is performed. Vickers hardness values were obtained based on the change in the surface area of the diamond pyramid. The results indicate that the hardness of the Ca1-xGdxMnO3 system (x = 0.05; 0.1; 0.15; 0.2) is not conditioned by the amount of doped gadolinium.
PB  - Belgrade : Institut za multidisciplinarna istraživanja
C3  - Programme ; and the Book of Abstracts / 6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia
T1  - Dilatometric study of nanostructured Ca1-xGdxMnO3 (X=0.05; 0.1; 0.15; 0.2)
SP  - 68
EP  - 68
UR  - https://hdl.handle.net/21.15107/rcub_dais_13634
ER  - 

@conference{
author = "Labus, Nebojša and Gulicovski, Jelena and Čebela, Maria and Rosić, Milena",
year = "2022",
abstract = "Nanocrystalline powders of Ca1-xGdxMnO3 (x=0.05, 0.1, 0.15, and 0.2) have been synthesized by the modified glycine nitrate procedure and pressed into pellets that served as green bodies for a systematic investigation on their structural and microstructural properties [1]. Dilatometric measurements were performed in order to confirm the optimal sintering temperature. Dilatometric curves, besides sintering, are recording superimposed phase transition and linear expansion. Using a dilatometric curve, three temperatures were determined at which the examined sample shows significant changes. At 1055 °C–1194 °C certain second order phase transition is evident, at 1365 °C–1409 °C intensive nitrogen oxide extrusion, and in duration of 86 min at 877 °C heating ramp thorough isothermal holding at 1410 °C until 158 min cooling schedule at 1331 °C sintering is performed. Vickers hardness values were obtained based on the change in the surface area of the diamond pyramid. The results indicate that the hardness of the Ca1-xGdxMnO3 system (x = 0.05; 0.1; 0.15; 0.2) is not conditioned by the amount of doped gadolinium.",
publisher = "Belgrade : Institut za multidisciplinarna istraživanja",
journal = "Programme ; and the Book of Abstracts / 6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia",
title = "Dilatometric study of nanostructured Ca1-xGdxMnO3 (X=0.05; 0.1; 0.15; 0.2)",
pages = "68-68",
url = "https://hdl.handle.net/21.15107/rcub_dais_13634"
}

Labus, N., Gulicovski, J., Čebela, M.,& Rosić, M.. (2022). Dilatometric study of nanostructured Ca1-xGdxMnO3 (X=0.05; 0.1; 0.15; 0.2). in Programme ; and the Book of Abstracts / 6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia
Belgrade : Institut za multidisciplinarna istraživanja., 68-68.
https://hdl.handle.net/21.15107/rcub_dais_13634

Labus N, Gulicovski J, Čebela M, Rosić M. Dilatometric study of nanostructured Ca1-xGdxMnO3 (X=0.05; 0.1; 0.15; 0.2). in Programme ; and the Book of Abstracts / 6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia. 2022;:68-68.
https://hdl.handle.net/21.15107/rcub_dais_13634 .

Labus, Nebojša, Gulicovski, Jelena, Čebela, Maria, Rosić, Milena, "Dilatometric study of nanostructured Ca1-xGdxMnO3 (X=0.05; 0.1; 0.15; 0.2)" in Programme ; and the Book of Abstracts / 6th Conference of The Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia (2022):68-68,
https://hdl.handle.net/21.15107/rcub_dais_13634 .

TY  - CONF
AU  - Rosić, Milena
AU  - Čebela, Maria
AU  - Labus, Nebojša
PY  - 2022
UR  - https://dais.sanu.ac.rs/123456789/13643
AB  - Nanometric size Ca1-xGdxMnO3 (x = 0.05, 0.1, 0.15, 0.2) powder particles with perovskite-type structure were obtained by applying a modified glycine-nitrate procedure. [1, 2] All samples were investigated by X-ray diffraction (XRD), Infrared (IR) spectroscopy and EPR (electron paramagnetic resonance) measurements. In the perovskites with space group Pnma, octahedral tilting is most common and it is of great interest for geologists and materials science. It was experimentally observed how the amount of gadolinium dopants affects on the Mn-O bonds angles and distances, MnO6 octahedral tilting, the deformation due to the presence of Jahn-Teller distortion around the Mn3+ cation and relation between the structural and magnetic behavior. [3] The infrared reflection spectra of Ca1-xGdxMnO3 samples confirmed XRD results that Ca1-xGdxMnO3 nanopowders are of Pnma-1 structure and that the octahedral tilting is increased with Gd doping. The EPR spectra are in agreement with the expectation that EPR linewidth depend of Mn-O-Mn angle and that small octahedral tilting brought only a small change of the EPR linewidth.
PB  - Belgrade : University of Belgrade, Faculty of Physical Chemistry
C3  - Contemporary batteries and supercapacitors : COIN2022 : program and book of abstracts / International Symposium Belgrade, June 1-2, 2022
T1  - Experimental Investigation of Octahedral Tilting and Related Effects of Ca1-xGdxMnO3 (x = 0.05, 0.1, 0.15, 0.2) Compound
SP  - 44
EP  - 44
UR  - https://hdl.handle.net/21.15107/rcub_dais_13643
ER  - 

@conference{
author = "Rosić, Milena and Čebela, Maria and Labus, Nebojša",
year = "2022",
abstract = "Nanometric size Ca1-xGdxMnO3 (x = 0.05, 0.1, 0.15, 0.2) powder particles with perovskite-type structure were obtained by applying a modified glycine-nitrate procedure. [1, 2] All samples were investigated by X-ray diffraction (XRD), Infrared (IR) spectroscopy and EPR (electron paramagnetic resonance) measurements. In the perovskites with space group Pnma, octahedral tilting is most common and it is of great interest for geologists and materials science. It was experimentally observed how the amount of gadolinium dopants affects on the Mn-O bonds angles and distances, MnO6 octahedral tilting, the deformation due to the presence of Jahn-Teller distortion around the Mn3+ cation and relation between the structural and magnetic behavior. [3] The infrared reflection spectra of Ca1-xGdxMnO3 samples confirmed XRD results that Ca1-xGdxMnO3 nanopowders are of Pnma-1 structure and that the octahedral tilting is increased with Gd doping. The EPR spectra are in agreement with the expectation that EPR linewidth depend of Mn-O-Mn angle and that small octahedral tilting brought only a small change of the EPR linewidth.",
publisher = "Belgrade : University of Belgrade, Faculty of Physical Chemistry",
journal = "Contemporary batteries and supercapacitors : COIN2022 : program and book of abstracts / International Symposium Belgrade, June 1-2, 2022",
title = "Experimental Investigation of Octahedral Tilting and Related Effects of Ca1-xGdxMnO3 (x = 0.05, 0.1, 0.15, 0.2) Compound",
pages = "44-44",
url = "https://hdl.handle.net/21.15107/rcub_dais_13643"
}

Rosić, M., Čebela, M.,& Labus, N.. (2022). Experimental Investigation of Octahedral Tilting and Related Effects of Ca1-xGdxMnO3 (x = 0.05, 0.1, 0.15, 0.2) Compound. in Contemporary batteries and supercapacitors : COIN2022 : program and book of abstracts / International Symposium Belgrade, June 1-2, 2022
Belgrade : University of Belgrade, Faculty of Physical Chemistry., 44-44.
https://hdl.handle.net/21.15107/rcub_dais_13643

Rosić M, Čebela M, Labus N. Experimental Investigation of Octahedral Tilting and Related Effects of Ca1-xGdxMnO3 (x = 0.05, 0.1, 0.15, 0.2) Compound. in Contemporary batteries and supercapacitors : COIN2022 : program and book of abstracts / International Symposium Belgrade, June 1-2, 2022. 2022;:44-44.
https://hdl.handle.net/21.15107/rcub_dais_13643 .

Rosić, Milena, Čebela, Maria, Labus, Nebojša, "Experimental Investigation of Octahedral Tilting and Related Effects of Ca1-xGdxMnO3 (x = 0.05, 0.1, 0.15, 0.2) Compound" in Contemporary batteries and supercapacitors : COIN2022 : program and book of abstracts / International Symposium Belgrade, June 1-2, 2022 (2022):44-44,
https://hdl.handle.net/21.15107/rcub_dais_13643 .

TY  - CONF
AU  - Labus, Nebojša
AU  - Rosić, Milena
AU  - Čebela, Maria
PY  - 2022
UR  - https://dais.sanu.ac.rs/123456789/13645
AB  - Oxidation processes during metal oxide heat treatment are important events that can be monitored by the means of well-known TGA/DTA and dimensional change diagrams. Powders Mn0.63Zn0.37Fe2O4 oxide was milled in different time duration and thermal analysis techniques afterwards during heating were observed. Cation that serves this purpose well for is Mn ion that passes through Mn2+ to Mn3+ state at 360 °C by oxidation and after that from Mn4+ to Mn3+ reduction process at 580 °C. Minimal data treatment of first derivative on shrinkage for obtaining shrinkage rate diagrams and as well first derivative on thermal gravimetric diagram for obtaining differential thermal gravimetric analysis diagram enable the oxidation and reduction processes monitoring.
PB  - Belgrade : University of Belgrade, Faculty of Physical Chemistry
C3  - Contemporary batteries and supercapacitors : COIN2022 : program and book of abstracts / International Symposium Belgrade, June 1-2, 2022
T1  - Complex Metal Oxide Oxidation State Changes Monitoring by TGA and Dilatometric Means
SP  - 43
EP  - 43
UR  - https://hdl.handle.net/21.15107/rcub_dais_13645
ER  - 

@conference{
author = "Labus, Nebojša and Rosić, Milena and Čebela, Maria",
year = "2022",
abstract = "Oxidation processes during metal oxide heat treatment are important events that can be monitored by the means of well-known TGA/DTA and dimensional change diagrams. Powders Mn0.63Zn0.37Fe2O4 oxide was milled in different time duration and thermal analysis techniques afterwards during heating were observed. Cation that serves this purpose well for is Mn ion that passes through Mn2+ to Mn3+ state at 360 °C by oxidation and after that from Mn4+ to Mn3+ reduction process at 580 °C. Minimal data treatment of first derivative on shrinkage for obtaining shrinkage rate diagrams and as well first derivative on thermal gravimetric diagram for obtaining differential thermal gravimetric analysis diagram enable the oxidation and reduction processes monitoring.",
publisher = "Belgrade : University of Belgrade, Faculty of Physical Chemistry",
journal = "Contemporary batteries and supercapacitors : COIN2022 : program and book of abstracts / International Symposium Belgrade, June 1-2, 2022",
title = "Complex Metal Oxide Oxidation State Changes Monitoring by TGA and Dilatometric Means",
pages = "43-43",
url = "https://hdl.handle.net/21.15107/rcub_dais_13645"
}

Labus, N., Rosić, M.,& Čebela, M.. (2022). Complex Metal Oxide Oxidation State Changes Monitoring by TGA and Dilatometric Means. in Contemporary batteries and supercapacitors : COIN2022 : program and book of abstracts / International Symposium Belgrade, June 1-2, 2022
Belgrade : University of Belgrade, Faculty of Physical Chemistry., 43-43.
https://hdl.handle.net/21.15107/rcub_dais_13645

Labus N, Rosić M, Čebela M. Complex Metal Oxide Oxidation State Changes Monitoring by TGA and Dilatometric Means. in Contemporary batteries and supercapacitors : COIN2022 : program and book of abstracts / International Symposium Belgrade, June 1-2, 2022. 2022;:43-43.
https://hdl.handle.net/21.15107/rcub_dais_13645 .

Labus, Nebojša, Rosić, Milena, Čebela, Maria, "Complex Metal Oxide Oxidation State Changes Monitoring by TGA and Dilatometric Means" in Contemporary batteries and supercapacitors : COIN2022 : program and book of abstracts / International Symposium Belgrade, June 1-2, 2022 (2022):43-43,
https://hdl.handle.net/21.15107/rcub_dais_13645 .

TY  - CONF
AU  - Labus, Nebojša
AU  - Rosić, Milena
AU  - Marković, Smilja
AU  - Nikolić, Maria Vesna
PY  - 2021
UR  - https://dais.sanu.ac.rs/123456789/11892
AB  - Sintering is often accompanied with phase transition. Phase transition kinetic is thus
hard to deconvolute due to the superposition of the sintering and phase transition dimensional
change phenomena. Metastabile perovskite phase ZnTiO3 reforms to stabile spinel Zn2TiO4 at
950°C with high kinetic rate. Dimensional change during heating of ZnTiO3 nano powder
compacts up to 1050°C was monitored using dilatometric thermo mechanical analyzer TMA
model SETSYS Evolution. Shrinkage of simultaneous sintering and phase transition were
recorded. The obtained non-isothermally sintered specimens were then second run treated
with same schedule. Sintering phenomenon of the ZnTiO3 nanopowder compact was also
recorded up to 900°C with isothermal holding of 25 minutes. Here phase transition was
avoided with lower temperature and isothermal holding. Second run heating, of isothermally
obtained specimens at 900°C, was recorded with non-isothermal heating schedule to 1050°C.
This has led to the dilatometric curve record of the ZnTiO3 phase transition in polycrystalline
bulk specimen, now recorded without sintering. In such a manner when kinetic is complex,
the separation of phenomena such as sintering, linear expansion and phase transition are
leading to the knowledge of their mutual interconnected relations. Also application of
mathematical operations on dilatometric data leads to the established procedure for the
sintering and phase transition data treatment.
T1  - Dilatometric study of the ZnTiO3 phase transition kinetic  influenced  by nano powder sintering
UR  - https://hdl.handle.net/21.15107/rcub_dais_11892
ER  - 

@conference{
author = "Labus, Nebojša and Rosić, Milena and Marković, Smilja and Nikolić, Maria Vesna",
year = "2021",
abstract = "Sintering is often accompanied with phase transition. Phase transition kinetic is thus
hard to deconvolute due to the superposition of the sintering and phase transition dimensional
change phenomena. Metastabile perovskite phase ZnTiO3 reforms to stabile spinel Zn2TiO4 at
950°C with high kinetic rate. Dimensional change during heating of ZnTiO3 nano powder
compacts up to 1050°C was monitored using dilatometric thermo mechanical analyzer TMA
model SETSYS Evolution. Shrinkage of simultaneous sintering and phase transition were
recorded. The obtained non-isothermally sintered specimens were then second run treated
with same schedule. Sintering phenomenon of the ZnTiO3 nanopowder compact was also
recorded up to 900°C with isothermal holding of 25 minutes. Here phase transition was
avoided with lower temperature and isothermal holding. Second run heating, of isothermally
obtained specimens at 900°C, was recorded with non-isothermal heating schedule to 1050°C.
This has led to the dilatometric curve record of the ZnTiO3 phase transition in polycrystalline
bulk specimen, now recorded without sintering. In such a manner when kinetic is complex,
the separation of phenomena such as sintering, linear expansion and phase transition are
leading to the knowledge of their mutual interconnected relations. Also application of
mathematical operations on dilatometric data leads to the established procedure for the
sintering and phase transition data treatment.",
title = "Dilatometric study of the ZnTiO3 phase transition kinetic  influenced  by nano powder sintering",
url = "https://hdl.handle.net/21.15107/rcub_dais_11892"
}

Labus, N., Rosić, M., Marković, S.,& Nikolić, M. V.. (2021). Dilatometric study of the ZnTiO3 phase transition kinetic  influenced  by nano powder sintering. .
https://hdl.handle.net/21.15107/rcub_dais_11892

Labus N, Rosić M, Marković S, Nikolić MV. Dilatometric study of the ZnTiO3 phase transition kinetic  influenced  by nano powder sintering. 2021;.
https://hdl.handle.net/21.15107/rcub_dais_11892 .

Labus, Nebojša, Rosić, Milena, Marković, Smilja, Nikolić, Maria Vesna, "Dilatometric study of the ZnTiO3 phase transition kinetic  influenced  by nano powder sintering" (2021),
https://hdl.handle.net/21.15107/rcub_dais_11892 .

TY  - CONF
AU  - Labus, Nebojša
AU  - Rosić, Milena
AU  - Marković, Smilja
AU  - Nikolić, Maria Vesna
PY  - 2021
UR  - https://dais.sanu.ac.rs/123456789/11894
AB  - Sintering is often accompanied with phase transition. Phase transition kinetic is thushard to deconvolute due to the superposition of the sintering and phase transition dimensionalchange phenomena. Metastabile perovskite phase ZnTiO3 reforms to stabile spinel Zn2TiO4 at950°C with high kinetic rate. Dimensional change during heating of ZnTiO3 nano powdercompacts up to 1050°C was monitored using dilatometric thermo mechanical analyzer TMAmodel SETSYS Evolution. Shrinkage of simultaneous sintering and phase transition wererecorded. The obtained non-isothermally sintered specimens were then second run treatedwith same schedule. Sintering phenomenon of the ZnTiO3 nanopowder compact was alsorecorded up to 900°C with isothermal holding of 25 minutes. Here phase transition wasavoided with lower temperature and isothermal holding. Second run heating, of isothermallyobtained specimens at 900°C, was recorded with non-isothermal heating schedule to 1050°C.This has led to the dilatometric curve record of the ZnTiO3 phase transition in polycrystallinebulk specimen, now recorded without sintering. In such a manner when kinetic is complex,the separation of phenomena such as sintering, linear expansion and phase transition areleading to the knowledge of their mutual interconnected relations. Also application ofmathematical operations on dilatometric data leads to the established procedure for thesintering and phase transition data treatment.
PB  - Belgrade : Serbian Ceramic Society
C3  - Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021
T1  - Dilatometric study of the ZnTiO3 phase transition kinetic  influenced  by nano powder sintering
SP  - 41
EP  - 41
UR  - https://hdl.handle.net/21.15107/rcub_dais_11894
ER  - 

@conference{
author = "Labus, Nebojša and Rosić, Milena and Marković, Smilja and Nikolić, Maria Vesna",
year = "2021",
abstract = "Sintering is often accompanied with phase transition. Phase transition kinetic is thushard to deconvolute due to the superposition of the sintering and phase transition dimensionalchange phenomena. Metastabile perovskite phase ZnTiO3 reforms to stabile spinel Zn2TiO4 at950°C with high kinetic rate. Dimensional change during heating of ZnTiO3 nano powdercompacts up to 1050°C was monitored using dilatometric thermo mechanical analyzer TMAmodel SETSYS Evolution. Shrinkage of simultaneous sintering and phase transition wererecorded. The obtained non-isothermally sintered specimens were then second run treatedwith same schedule. Sintering phenomenon of the ZnTiO3 nanopowder compact was alsorecorded up to 900°C with isothermal holding of 25 minutes. Here phase transition wasavoided with lower temperature and isothermal holding. Second run heating, of isothermallyobtained specimens at 900°C, was recorded with non-isothermal heating schedule to 1050°C.This has led to the dilatometric curve record of the ZnTiO3 phase transition in polycrystallinebulk specimen, now recorded without sintering. In such a manner when kinetic is complex,the separation of phenomena such as sintering, linear expansion and phase transition areleading to the knowledge of their mutual interconnected relations. Also application ofmathematical operations on dilatometric data leads to the established procedure for thesintering and phase transition data treatment.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021",
title = "Dilatometric study of the ZnTiO3 phase transition kinetic  influenced  by nano powder sintering",
pages = "41-41",
url = "https://hdl.handle.net/21.15107/rcub_dais_11894"
}

Labus, N., Rosić, M., Marković, S.,& Nikolić, M. V.. (2021). Dilatometric study of the ZnTiO3 phase transition kinetic  influenced  by nano powder sintering. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021
Belgrade : Serbian Ceramic Society., 41-41.
https://hdl.handle.net/21.15107/rcub_dais_11894

Labus N, Rosić M, Marković S, Nikolić MV. Dilatometric study of the ZnTiO3 phase transition kinetic  influenced  by nano powder sintering. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021. 2021;:41-41.
https://hdl.handle.net/21.15107/rcub_dais_11894 .

Labus, Nebojša, Rosić, Milena, Marković, Smilja, Nikolić, Maria Vesna, "Dilatometric study of the ZnTiO3 phase transition kinetic  influenced  by nano powder sintering" in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021 (2021):41-41,
https://hdl.handle.net/21.15107/rcub_dais_11894 .

TY  - CONF
AU  - Rosić, Milena
AU  - Labus, Nebojša
AU  - Čebela, Maria
PY  - 2021
UR  - https://dais.sanu.ac.rs/123456789/11910
AB  - Nanocrystalline manganites Ca1-xGdxMnO3(x=0.05, 0.1, 0.15, 0.2) were synthesized by a modified glycine-nitrate procedure. The subsequent studies were focused on the structural, microstructural and magnetic changes of the starting materials induced by calcination and sintering. Thermal treatments of the green bodies were carried out by conventional sintering method. Phase evolution, lattice parameters, chemical composition and magnetic properties were monitored by Differential thermal analysis (DTA), X-ray diffraction (XRD),Induction coupled Plasma Atomic Emission (ICPES), Scanning electron Microscopy with Energy Dispersive Spectroscopy SEM/EDS and magnetic measurements on Superconducting Quantum Interference Device (Squid).DTA revealed phase transition at ≈918ºC.Chemical analysis has been done by ICPES and EDSwhich confirmed that nominal composition has been attained for all samples. XRD data were analysed by Rietveld refinement which showed that orthorhombic perovskite structure, S.G. Pnma (62), persisted with the change of Gd content, while unit cell parameters depended on the composition. Magnetic measurements show that electron doping by Gd3+ ions substantially changes CaMnO3 antiferromagnetic behavior. After introduction of Gd3+ ions, significant ferromagnetic component appears due to an emergence of double exchange interaction between Mn3+-Mn4+ ions. This resulted in appearance of a low temperature plateau in field cooled magnetization diagram as well as in hysteresis loop with the relatively high coercivity up to 2300 Oe.
PB  - Belgrade : Serbian Ceramic Society
C3  - Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021
T1  - Modified glycine nitrate procedure synthesis and properties of nanostructured Ca1-xGdxMnO3 (x=0.05; 0.1; 0.15; 0.2)
SP  - 39
EP  - 40
UR  - https://hdl.handle.net/21.15107/rcub_dais_11910
ER  - 

@conference{
author = "Rosić, Milena and Labus, Nebojša and Čebela, Maria",
year = "2021",
abstract = "Nanocrystalline manganites Ca1-xGdxMnO3(x=0.05, 0.1, 0.15, 0.2) were synthesized by a modified glycine-nitrate procedure. The subsequent studies were focused on the structural, microstructural and magnetic changes of the starting materials induced by calcination and sintering. Thermal treatments of the green bodies were carried out by conventional sintering method. Phase evolution, lattice parameters, chemical composition and magnetic properties were monitored by Differential thermal analysis (DTA), X-ray diffraction (XRD),Induction coupled Plasma Atomic Emission (ICPES), Scanning electron Microscopy with Energy Dispersive Spectroscopy SEM/EDS and magnetic measurements on Superconducting Quantum Interference Device (Squid).DTA revealed phase transition at ≈918ºC.Chemical analysis has been done by ICPES and EDSwhich confirmed that nominal composition has been attained for all samples. XRD data were analysed by Rietveld refinement which showed that orthorhombic perovskite structure, S.G. Pnma (62), persisted with the change of Gd content, while unit cell parameters depended on the composition. Magnetic measurements show that electron doping by Gd3+ ions substantially changes CaMnO3 antiferromagnetic behavior. After introduction of Gd3+ ions, significant ferromagnetic component appears due to an emergence of double exchange interaction between Mn3+-Mn4+ ions. This resulted in appearance of a low temperature plateau in field cooled magnetization diagram as well as in hysteresis loop with the relatively high coercivity up to 2300 Oe.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021",
title = "Modified glycine nitrate procedure synthesis and properties of nanostructured Ca1-xGdxMnO3 (x=0.05; 0.1; 0.15; 0.2)",
pages = "39-40",
url = "https://hdl.handle.net/21.15107/rcub_dais_11910"
}

Rosić, M., Labus, N.,& Čebela, M.. (2021). Modified glycine nitrate procedure synthesis and properties of nanostructured Ca1-xGdxMnO3 (x=0.05; 0.1; 0.15; 0.2). in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021
Belgrade : Serbian Ceramic Society., 39-40.
https://hdl.handle.net/21.15107/rcub_dais_11910

Rosić M, Labus N, Čebela M. Modified glycine nitrate procedure synthesis and properties of nanostructured Ca1-xGdxMnO3 (x=0.05; 0.1; 0.15; 0.2). in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021. 2021;:39-40.
https://hdl.handle.net/21.15107/rcub_dais_11910 .

Rosić, Milena, Labus, Nebojša, Čebela, Maria, "Modified glycine nitrate procedure synthesis and properties of nanostructured Ca1-xGdxMnO3 (x=0.05; 0.1; 0.15; 0.2)" in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021 (2021):39-40,
https://hdl.handle.net/21.15107/rcub_dais_11910 .

TY  - CONF
AU  - Rosić, Milena
AU  - Milivojević, Dušan
AU  - Labus, Nebojša
AU  - Čebela, Maria
AU  - Dodevski, Vladimir
AU  - Jordanov, Dragana
AU  - Stojmenović, Marija
PY  - 2021
UR  - https://dais.sanu.ac.rs/123456789/11899
AB  - Experimental and theoretical methods have been used to investigate the octahedral tilting and related effects of Ca1-xGdxMnO3(x = 0.05; 0.1; 0.15; 0.2) compound. Both methods have shown that orthorhombic-perovskite structure (space group Pnma) is the most stable form and according to Glazer's classification belongs to a-b+a- tilt system. Bond valence calculations (BVC) have shown ten additional perovskite-related modifications of the equilibrium Ca1- xGdxMnO3 structure, and their stability has been investigated as function of Gd doping. We have further studied the influence of gadolinium amount on Mn-О bond angles and distances, tilting of MnO6octahedra around all three axes and deformation due to the presence of Jahn- Teller distortion around Mn3+ cation, and calculated the amount of Mn3+ in the system. BVC approach is a simple, fast and efficient way of calculating the amount of Mn4+ and Mn3+ in the doped perovskite compound, which, to the best of our knowledge, has not been done before. The infrared reflection spectra of Ca1-xGdxMnO3 samples confirmed XRD results that Ca1-xGdxMnO3 nanopowders are of Pnma-1 structure and that the tilting of octahedra are increased with Gd doping. The EPR (electron paramagnetic resonance) spectra are in accordance with the assumption that EPR line width is Mn-O-Mn angle dependent. The studied samples showed that small octahedra tilting in these samples brought only a small change of the EPR line width.
PB  - Belgrade : Serbian Ceramic Society
C3  - Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021
T1  - Experimental and theoretical study of nanostructured Ca1-xGdxMnO3 (x=0.05; 0.1; 0.15; 0.2)
SP  - 70
EP  - 70
UR  - https://hdl.handle.net/21.15107/rcub_dais_11899
ER  - 

@conference{
author = "Rosić, Milena and Milivojević, Dušan and Labus, Nebojša and Čebela, Maria and Dodevski, Vladimir and Jordanov, Dragana and Stojmenović, Marija",
year = "2021",
abstract = "Experimental and theoretical methods have been used to investigate the octahedral tilting and related effects of Ca1-xGdxMnO3(x = 0.05; 0.1; 0.15; 0.2) compound. Both methods have shown that orthorhombic-perovskite structure (space group Pnma) is the most stable form and according to Glazer's classification belongs to a-b+a- tilt system. Bond valence calculations (BVC) have shown ten additional perovskite-related modifications of the equilibrium Ca1- xGdxMnO3 structure, and their stability has been investigated as function of Gd doping. We have further studied the influence of gadolinium amount on Mn-О bond angles and distances, tilting of MnO6octahedra around all three axes and deformation due to the presence of Jahn- Teller distortion around Mn3+ cation, and calculated the amount of Mn3+ in the system. BVC approach is a simple, fast and efficient way of calculating the amount of Mn4+ and Mn3+ in the doped perovskite compound, which, to the best of our knowledge, has not been done before. The infrared reflection spectra of Ca1-xGdxMnO3 samples confirmed XRD results that Ca1-xGdxMnO3 nanopowders are of Pnma-1 structure and that the tilting of octahedra are increased with Gd doping. The EPR (electron paramagnetic resonance) spectra are in accordance with the assumption that EPR line width is Mn-O-Mn angle dependent. The studied samples showed that small octahedra tilting in these samples brought only a small change of the EPR line width.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021",
title = "Experimental and theoretical study of nanostructured Ca1-xGdxMnO3 (x=0.05; 0.1; 0.15; 0.2)",
pages = "70-70",
url = "https://hdl.handle.net/21.15107/rcub_dais_11899"
}

Rosić, M., Milivojević, D., Labus, N., Čebela, M., Dodevski, V., Jordanov, D.,& Stojmenović, M.. (2021). Experimental and theoretical study of nanostructured Ca1-xGdxMnO3 (x=0.05; 0.1; 0.15; 0.2). in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021
Belgrade : Serbian Ceramic Society., 70-70.
https://hdl.handle.net/21.15107/rcub_dais_11899

Rosić M, Milivojević D, Labus N, Čebela M, Dodevski V, Jordanov D, Stojmenović M. Experimental and theoretical study of nanostructured Ca1-xGdxMnO3 (x=0.05; 0.1; 0.15; 0.2). in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021. 2021;:70-70.
https://hdl.handle.net/21.15107/rcub_dais_11899 .

Rosić, Milena, Milivojević, Dušan, Labus, Nebojša, Čebela, Maria, Dodevski, Vladimir, Jordanov, Dragana, Stojmenović, Marija, "Experimental and theoretical study of nanostructured Ca1-xGdxMnO3 (x=0.05; 0.1; 0.15; 0.2)" in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021 (2021):70-70,
https://hdl.handle.net/21.15107/rcub_dais_11899 .

TY  - JOUR
AU  - Dodevski, Vladimir
AU  - Pagnacco, Maja C.
AU  - Radović, Ivana
AU  - Rosić, Milena
AU  - Janković, Bojan
AU  - Stojmenović, Marija
AU  - Mitić, Vojislav V.
PY  - 2020
UR  - https://dais.sanu.ac.rs/123456789/8726
AB  - The aim of this research was to obtain a carbon solid residue by the carbonization process of biomass in an inert atmosphere which, through physical activation and chemical treatment (using TEOS - tetraethyl orthosilicate) would allow creation of highly porous and spatially distinct ordered bio-SiC ceramics. The results of carbonization experiments at several operating temperatures and activation of carbons with multiple-cycle treatments TEOS clearly showed the possibility of obtaining SiC nano-structures, after performing the carbothermal reduction at 1400 °C. The increase in the activation temperature and the duration time starts the development of the SiC particles inside the porous structure. The XRPD analysis showed that the major SiC polytype has cubic SiC (β-SiC) structure and remainder is hexagonal SiC polytypic (α-SiC) structure. It was established that the carbons obtained from carbonization of the Platanus orientalis L. plane tree fruit (PTF) precursor and activated at 850 °C with longer holding times (1 and 2 h) exhibit β-SiC (cubic) nano-wires. A possible nano-wires increment mechanism was suggested. The obtained results represent significant contribution in understanding the process as well as the main characteristics of SiC nano-materials and their possible applications.
PB  - Elsevier
T2  - Materials Chemistry and Physics
T1  - Characterization of silicon carbide ceramics obtained from porous carbon structure achieved by plant carbonization
SP  - 122768
VL  - 245
DO  - 10.1016/j.matchemphys.2020.122768
UR  - https://hdl.handle.net/21.15107/rcub_dais_8726
ER  - 

@article{
author = "Dodevski, Vladimir and Pagnacco, Maja C. and Radović, Ivana and Rosić, Milena and Janković, Bojan and Stojmenović, Marija and Mitić, Vojislav V.",
year = "2020",
abstract = "The aim of this research was to obtain a carbon solid residue by the carbonization process of biomass in an inert atmosphere which, through physical activation and chemical treatment (using TEOS - tetraethyl orthosilicate) would allow creation of highly porous and spatially distinct ordered bio-SiC ceramics. The results of carbonization experiments at several operating temperatures and activation of carbons with multiple-cycle treatments TEOS clearly showed the possibility of obtaining SiC nano-structures, after performing the carbothermal reduction at 1400 °C. The increase in the activation temperature and the duration time starts the development of the SiC particles inside the porous structure. The XRPD analysis showed that the major SiC polytype has cubic SiC (β-SiC) structure and remainder is hexagonal SiC polytypic (α-SiC) structure. It was established that the carbons obtained from carbonization of the Platanus orientalis L. plane tree fruit (PTF) precursor and activated at 850 °C with longer holding times (1 and 2 h) exhibit β-SiC (cubic) nano-wires. A possible nano-wires increment mechanism was suggested. The obtained results represent significant contribution in understanding the process as well as the main characteristics of SiC nano-materials and their possible applications.",
publisher = "Elsevier",
journal = "Materials Chemistry and Physics",
title = "Characterization of silicon carbide ceramics obtained from porous carbon structure achieved by plant carbonization",
pages = "122768",
volume = "245",
doi = "10.1016/j.matchemphys.2020.122768",
url = "https://hdl.handle.net/21.15107/rcub_dais_8726"
}

Dodevski, V., Pagnacco, M. C., Radović, I., Rosić, M., Janković, B., Stojmenović, M.,& Mitić, V. V.. (2020). Characterization of silicon carbide ceramics obtained from porous carbon structure achieved by plant carbonization. in Materials Chemistry and Physics
Elsevier., 245, 122768.
https://doi.org/10.1016/j.matchemphys.2020.122768
https://hdl.handle.net/21.15107/rcub_dais_8726

Dodevski V, Pagnacco MC, Radović I, Rosić M, Janković B, Stojmenović M, Mitić VV. Characterization of silicon carbide ceramics obtained from porous carbon structure achieved by plant carbonization. in Materials Chemistry and Physics. 2020;245:122768.
doi:10.1016/j.matchemphys.2020.122768
https://hdl.handle.net/21.15107/rcub_dais_8726 .

Dodevski, Vladimir, Pagnacco, Maja C., Radović, Ivana, Rosić, Milena, Janković, Bojan, Stojmenović, Marija, Mitić, Vojislav V., "Characterization of silicon carbide ceramics obtained from porous carbon structure achieved by plant carbonization" in Materials Chemistry and Physics, 245 (2020):122768,
https://doi.org/10.1016/j.matchemphys.2020.122768 .,
https://hdl.handle.net/21.15107/rcub_dais_8726 .

TY  - CONF
AU  - Labus, Nebojša
AU  - Rosić, Milena
AU  - Čebela, Maria
AU  - Jordanov, Dragana
AU  - Dodevski, Dragan
AU  - Radović, Ivana
PY  - 2019
UR  - https://dais.sanu.ac.rs/123456789/7001
AB  - In this study we have combined two research methods: structure prediction of ZnTiO3 using computational SPuDS software, and the characterization of binary oxides obtained from ZnO TiO2 system. Pure nanosized ZnTiO3 (99.5%), was compacted in cylindrical shape specimens by uniaxial double sided compaction and then sintered in air atmosphere in a dilatometric device [1,2]. One compact was sintered up to 915 °C to retain metastabile ZnTiO3 and held 5 minutes on that temperature, and another one at the same conditions, but now up to 970 °C to induce phase transition and to obtain stabile Zn2TiO4 and TiO2 according to phase diagram [2]. Reheated samples obtained at different characteristic temperatures in air were analyzed by X-ray diffraction (XRD). The infrared attenuated total reflectivity measurements confirmed XRD results. In order to estimate theoretical stability of these perovskite structure, Goldschmidt tolerance factor Gt and global instability index GII were calculated. Furthermore, the Ti valence states were determined by bond valence calculations (BVC). Also, we have investigated the formation of new phases (Zn2Ti3O8, TiO2 and Zn2TiO4) originating from ZnTiO3 with temperature change, as well as the relation between the crystal structures which have been predicted and the structure of the phases we have experimentally observed.
PB  - Belgrade : Institute for Multidisciplinary Research
C3  - Programme and the Book of Abstracts / 5th Conference of The Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia
T1  - Theoretical and experimental study of polycrystalline phases obtained by the nanometric ZnTiO3 powder sintering
SP  - 110
EP  - 110
UR  - https://hdl.handle.net/21.15107/rcub_dais_7001
ER  - 

@conference{
author = "Labus, Nebojša and Rosić, Milena and Čebela, Maria and Jordanov, Dragana and Dodevski, Dragan and Radović, Ivana",
year = "2019",
abstract = "In this study we have combined two research methods: structure prediction of ZnTiO3 using computational SPuDS software, and the characterization of binary oxides obtained from ZnO TiO2 system. Pure nanosized ZnTiO3 (99.5%), was compacted in cylindrical shape specimens by uniaxial double sided compaction and then sintered in air atmosphere in a dilatometric device [1,2]. One compact was sintered up to 915 °C to retain metastabile ZnTiO3 and held 5 minutes on that temperature, and another one at the same conditions, but now up to 970 °C to induce phase transition and to obtain stabile Zn2TiO4 and TiO2 according to phase diagram [2]. Reheated samples obtained at different characteristic temperatures in air were analyzed by X-ray diffraction (XRD). The infrared attenuated total reflectivity measurements confirmed XRD results. In order to estimate theoretical stability of these perovskite structure, Goldschmidt tolerance factor Gt and global instability index GII were calculated. Furthermore, the Ti valence states were determined by bond valence calculations (BVC). Also, we have investigated the formation of new phases (Zn2Ti3O8, TiO2 and Zn2TiO4) originating from ZnTiO3 with temperature change, as well as the relation between the crystal structures which have been predicted and the structure of the phases we have experimentally observed.",
publisher = "Belgrade : Institute for Multidisciplinary Research",
journal = "Programme and the Book of Abstracts / 5th Conference of The Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia",
title = "Theoretical and experimental study of polycrystalline phases obtained by the nanometric ZnTiO3 powder sintering",
pages = "110-110",
url = "https://hdl.handle.net/21.15107/rcub_dais_7001"
}

Labus, N., Rosić, M., Čebela, M., Jordanov, D., Dodevski, D.,& Radović, I.. (2019). Theoretical and experimental study of polycrystalline phases obtained by the nanometric ZnTiO3 powder sintering. in Programme and the Book of Abstracts / 5th Conference of The Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia
Belgrade : Institute for Multidisciplinary Research., 110-110.
https://hdl.handle.net/21.15107/rcub_dais_7001

Labus N, Rosić M, Čebela M, Jordanov D, Dodevski D, Radović I. Theoretical and experimental study of polycrystalline phases obtained by the nanometric ZnTiO3 powder sintering. in Programme and the Book of Abstracts / 5th Conference of The Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia. 2019;:110-110.
https://hdl.handle.net/21.15107/rcub_dais_7001 .

Labus, Nebojša, Rosić, Milena, Čebela, Maria, Jordanov, Dragana, Dodevski, Dragan, Radović, Ivana, "Theoretical and experimental study of polycrystalline phases obtained by the nanometric ZnTiO3 powder sintering" in Programme and the Book of Abstracts / 5th Conference of The Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia (2019):110-110,
https://hdl.handle.net/21.15107/rcub_dais_7001 .