TY  - JOUR
AU  - Jugović, Dragana
AU  - Mitrić, Miodrag
AU  - Milović, Miloš
AU  - Jokić, Bojan
AU  - Vukomanović, Marija
AU  - Suvorov, Danilo
AU  - Uskoković, Dragan
PY  - 2013
UR  - https://dais.sanu.ac.rs/123456789/753
AB  - In this study, nanocrystalline LiFePO4/C composite powder has been synthesized via a cellulose matrix-assisted method. In an experiment conducted under extreme conditions involving rapid heating, short high-temperature delay, and subsequent quenching, well-ordered 35-nm crystallites have been obtained within 5 min. A quantitative filter paper has served both as a template and carbon source. It degrades pyrolytically through fragmentation reactions and formation of volatiles when exposed to rapid heating, which further has an impact on powder morphology, as revealed by electron microscopy studies. The electrochemical measurements in terms of galvanostatic cycling have shown that the approach presented in this study may enable to reach good rate capability and excellent cycling stability.
T2  - Powder Technology
T1  - Properties of quenched LiFePO4/C powder obtained via cellulose matrix-assisted method
SP  - 539
EP  - 544
VL  - 246
DO  - 10.1016/j.powtec.2013.06.021
UR  - https://hdl.handle.net/21.15107/rcub_dais_753
ER  - 

@article{
author = "Jugović, Dragana and Mitrić, Miodrag and Milović, Miloš and Jokić, Bojan and Vukomanović, Marija and Suvorov, Danilo and Uskoković, Dragan",
year = "2013",
abstract = "In this study, nanocrystalline LiFePO4/C composite powder has been synthesized via a cellulose matrix-assisted method. In an experiment conducted under extreme conditions involving rapid heating, short high-temperature delay, and subsequent quenching, well-ordered 35-nm crystallites have been obtained within 5 min. A quantitative filter paper has served both as a template and carbon source. It degrades pyrolytically through fragmentation reactions and formation of volatiles when exposed to rapid heating, which further has an impact on powder morphology, as revealed by electron microscopy studies. The electrochemical measurements in terms of galvanostatic cycling have shown that the approach presented in this study may enable to reach good rate capability and excellent cycling stability.",
journal = "Powder Technology",
title = "Properties of quenched LiFePO4/C powder obtained via cellulose matrix-assisted method",
pages = "539-544",
volume = "246",
doi = "10.1016/j.powtec.2013.06.021",
url = "https://hdl.handle.net/21.15107/rcub_dais_753"
}

Jugović, D., Mitrić, M., Milović, M., Jokić, B., Vukomanović, M., Suvorov, D.,& Uskoković, D.. (2013). Properties of quenched LiFePO4/C powder obtained via cellulose matrix-assisted method. in Powder Technology, 246, 539-544.
https://doi.org/10.1016/j.powtec.2013.06.021
https://hdl.handle.net/21.15107/rcub_dais_753

Jugović D, Mitrić M, Milović M, Jokić B, Vukomanović M, Suvorov D, Uskoković D. Properties of quenched LiFePO4/C powder obtained via cellulose matrix-assisted method. in Powder Technology. 2013;246:539-544.
doi:10.1016/j.powtec.2013.06.021
https://hdl.handle.net/21.15107/rcub_dais_753 .

Jugović, Dragana, Mitrić, Miodrag, Milović, Miloš, Jokić, Bojan, Vukomanović, Marija, Suvorov, Danilo, Uskoković, Dragan, "Properties of quenched LiFePO4/C powder obtained via cellulose matrix-assisted method" in Powder Technology, 246 (2013):539-544,
https://doi.org/10.1016/j.powtec.2013.06.021 .,
https://hdl.handle.net/21.15107/rcub_dais_753 .

TY  - JOUR
AU  - Jugović, Dragana
AU  - Mitrić, Miodrag
AU  - Milović, Miloš
AU  - Jokić, Bojan
AU  - Vukomanović, Marija
AU  - Suvorov, Danilo
AU  - Uskoković, Dragan
PY  - 2013
UR  - https://dais.sanu.ac.rs/123456789/356
AB  - In this study, nanocrystalline LiFePO4/C composite powder has been synthesized via a cellulose matrix-assisted method. In an experiment conducted under extreme conditions involving rapid heating, short high-temperature delay, and subsequent quenching, well-ordered 35-nm crystallites have been obtained within 5 min. A quantitative filter paper has served both as a template and carbon source. It degrades pyrolytically through fragmentation reactions and formation of volatiles when exposed to rapid heating, which further has an impact on powder morphology, as revealed by electron microscopy studies. The electrochemical measurements in terms of galvanostatic cycling have shown that the approach presented in this study may enable to reach good rate capability and excellent cycling stability.
PB  - Elsevier
T2  - Powder Technology
T1  - Properties of quenched LiFePO4/C powder obtained via cellulose matrix-assisted method
SP  - 539
EP  - 544
VL  - 246
DO  - 10.1016/j.powtec.2013.06.021
UR  - https://hdl.handle.net/21.15107/rcub_dais_356
ER  - 

@article{
author = "Jugović, Dragana and Mitrić, Miodrag and Milović, Miloš and Jokić, Bojan and Vukomanović, Marija and Suvorov, Danilo and Uskoković, Dragan",
year = "2013",
abstract = "In this study, nanocrystalline LiFePO4/C composite powder has been synthesized via a cellulose matrix-assisted method. In an experiment conducted under extreme conditions involving rapid heating, short high-temperature delay, and subsequent quenching, well-ordered 35-nm crystallites have been obtained within 5 min. A quantitative filter paper has served both as a template and carbon source. It degrades pyrolytically through fragmentation reactions and formation of volatiles when exposed to rapid heating, which further has an impact on powder morphology, as revealed by electron microscopy studies. The electrochemical measurements in terms of galvanostatic cycling have shown that the approach presented in this study may enable to reach good rate capability and excellent cycling stability.",
publisher = "Elsevier",
journal = "Powder Technology",
title = "Properties of quenched LiFePO4/C powder obtained via cellulose matrix-assisted method",
pages = "539-544",
volume = "246",
doi = "10.1016/j.powtec.2013.06.021",
url = "https://hdl.handle.net/21.15107/rcub_dais_356"
}

Jugović, D., Mitrić, M., Milović, M., Jokić, B., Vukomanović, M., Suvorov, D.,& Uskoković, D.. (2013). Properties of quenched LiFePO4/C powder obtained via cellulose matrix-assisted method. in Powder Technology
Elsevier., 246, 539-544.
https://doi.org/10.1016/j.powtec.2013.06.021
https://hdl.handle.net/21.15107/rcub_dais_356

Jugović D, Mitrić M, Milović M, Jokić B, Vukomanović M, Suvorov D, Uskoković D. Properties of quenched LiFePO4/C powder obtained via cellulose matrix-assisted method. in Powder Technology. 2013;246:539-544.
doi:10.1016/j.powtec.2013.06.021
https://hdl.handle.net/21.15107/rcub_dais_356 .

Jugović, Dragana, Mitrić, Miodrag, Milović, Miloš, Jokić, Bojan, Vukomanović, Marija, Suvorov, Danilo, Uskoković, Dragan, "Properties of quenched LiFePO4/C powder obtained via cellulose matrix-assisted method" in Powder Technology, 246 (2013):539-544,
https://doi.org/10.1016/j.powtec.2013.06.021 .,
https://hdl.handle.net/21.15107/rcub_dais_356 .

TY  - CHAP
AU  - Marković, Smilja
AU  - Lukić, Miodrag J.
AU  - Jovalekić, Čedomir
AU  - Škapin, Srečo Davor
AU  - Suvorov, Danilo
AU  - Uskoković, Dragan
PY  - 2013
UR  - https://dais.sanu.ac.rs/123456789/512
AB  - CCTO powders were prepared by solid state reaction and mechanochemically, respectively. Synthesized powders were characterized by XRD, FE-SEM and PSA techniques. The sinterability of CCTO powders was investigated by heating microscopy. Powders were uniaxially pressed into pellets and sintered up to 1100 °C, with heating rates of 2, 5, 10 and 20 °/min. The recorded shrinkage curves were used for choosing conventional and two step sintering (TSS) conditions. By TSS the samples were heated up to 1070 °C and after retention for 10 min cooled down to 1020 °C and kept for 20 h. The microstructure of CCTO ceramics sintered by conventional and TSS techniques was examined by FE-SEM method; the electrical properties were investigated in medium frequency (MF) range (42 Hz-5 MHz) and in the microwave (MW) range of frequencies. Electrical properties of the sintered CCTO ceramics were correlated to the samples microstructure. Finally, we have shown that appropriate choice of sintering conditions is important for preparation of high-quality CCTO ceramics with high dielectric permittivity in the kilohertz range as well as at the resonant frequency.
PB  - Hoboken, NJ : John Wiley & Sons
T2  - Processing and Properties of Advanced Ceramics and Composites V
T1  - Sintering Effects on Microstructure and Electrical Properties of CaCu3Ti4O12 Ceramics
SP  - 337
EP  - 348
DO  - 10.1002/9781118744109.ch37
UR  - https://hdl.handle.net/21.15107/rcub_dais_512
ER  - 

@inbook{
author = "Marković, Smilja and Lukić, Miodrag J. and Jovalekić, Čedomir and Škapin, Srečo Davor and Suvorov, Danilo and Uskoković, Dragan",
year = "2013",
abstract = "CCTO powders were prepared by solid state reaction and mechanochemically, respectively. Synthesized powders were characterized by XRD, FE-SEM and PSA techniques. The sinterability of CCTO powders was investigated by heating microscopy. Powders were uniaxially pressed into pellets and sintered up to 1100 °C, with heating rates of 2, 5, 10 and 20 °/min. The recorded shrinkage curves were used for choosing conventional and two step sintering (TSS) conditions. By TSS the samples were heated up to 1070 °C and after retention for 10 min cooled down to 1020 °C and kept for 20 h. The microstructure of CCTO ceramics sintered by conventional and TSS techniques was examined by FE-SEM method; the electrical properties were investigated in medium frequency (MF) range (42 Hz-5 MHz) and in the microwave (MW) range of frequencies. Electrical properties of the sintered CCTO ceramics were correlated to the samples microstructure. Finally, we have shown that appropriate choice of sintering conditions is important for preparation of high-quality CCTO ceramics with high dielectric permittivity in the kilohertz range as well as at the resonant frequency.",
publisher = "Hoboken, NJ : John Wiley & Sons",
journal = "Processing and Properties of Advanced Ceramics and Composites V",
booktitle = "Sintering Effects on Microstructure and Electrical Properties of CaCu3Ti4O12 Ceramics",
pages = "337-348",
doi = "10.1002/9781118744109.ch37",
url = "https://hdl.handle.net/21.15107/rcub_dais_512"
}

Marković, S., Lukić, M. J., Jovalekić, Č., Škapin, S. D., Suvorov, D.,& Uskoković, D.. (2013). Sintering Effects on Microstructure and Electrical Properties of CaCu3Ti4O12 Ceramics. in Processing and Properties of Advanced Ceramics and Composites V
Hoboken, NJ : John Wiley & Sons., 337-348.
https://doi.org/10.1002/9781118744109.ch37
https://hdl.handle.net/21.15107/rcub_dais_512

Marković S, Lukić MJ, Jovalekić Č, Škapin SD, Suvorov D, Uskoković D. Sintering Effects on Microstructure and Electrical Properties of CaCu3Ti4O12 Ceramics. in Processing and Properties of Advanced Ceramics and Composites V. 2013;:337-348.
doi:10.1002/9781118744109.ch37
https://hdl.handle.net/21.15107/rcub_dais_512 .

Marković, Smilja, Lukić, Miodrag J., Jovalekić, Čedomir, Škapin, Srečo Davor, Suvorov, Danilo, Uskoković, Dragan, "Sintering Effects on Microstructure and Electrical Properties of CaCu3Ti4O12 Ceramics" in Processing and Properties of Advanced Ceramics and Composites V (2013):337-348,
https://doi.org/10.1002/9781118744109.ch37 .,
https://hdl.handle.net/21.15107/rcub_dais_512 .

TY  - CHAP
AU  - Marković, Smilja
AU  - Lukić, Miodrag J.
AU  - Jovalekić, Čedomir
AU  - Škapin, Srečo Davor
AU  - Suvorov, Danilo
AU  - Uskoković, Dragan
PY  - 2013
UR  - https://dais.sanu.ac.rs/123456789/511
AB  - CCTO powders were prepared by solid state reaction and mechanochemically, respectively. Synthesized powders were characterized by XRD, FE-SEM and PSA techniques. The sinterability of CCTO powders was investigated by heating microscopy. Powders were uniaxially pressed into pellets and sintered up to 1100 °C, with heating rates of 2, 5, 10 and 20 °/min. The recorded shrinkage curves were used for choosing conventional and two step sintering (TSS) conditions. By TSS the samples were heated up to 1070 °C and after retention for 10 min cooled down to 1020 °C and kept for 20 h. The microstructure of CCTO ceramics sintered by conventional and TSS techniques was examined by FE-SEM method; the electrical properties were investigated in medium frequency (MF) range (42 Hz-5 MHz) and in the microwave (MW) range of frequencies. Electrical properties of the sintered CCTO ceramics were correlated to the samples microstructure. Finally, we have shown that appropriate choice of sintering conditions is important for preparation of high-quality CCTO ceramics with high dielectric permittivity in the kilohertz range as well as at the resonant frequency.
PB  - Hoboken, NJ : John Wiley & Sons
T2  - Processing and Properties of Advanced Ceramics and Composites V
T1  - Sintering Effects on Microstructure and Electrical Properties of CaCu3Ti4O12 Ceramics
SP  - 337
EP  - 348
DO  - 10.1002/9781118744109.ch37
UR  - https://hdl.handle.net/21.15107/rcub_dais_511
ER  - 

@inbook{
author = "Marković, Smilja and Lukić, Miodrag J. and Jovalekić, Čedomir and Škapin, Srečo Davor and Suvorov, Danilo and Uskoković, Dragan",
year = "2013",
abstract = "CCTO powders were prepared by solid state reaction and mechanochemically, respectively. Synthesized powders were characterized by XRD, FE-SEM and PSA techniques. The sinterability of CCTO powders was investigated by heating microscopy. Powders were uniaxially pressed into pellets and sintered up to 1100 °C, with heating rates of 2, 5, 10 and 20 °/min. The recorded shrinkage curves were used for choosing conventional and two step sintering (TSS) conditions. By TSS the samples were heated up to 1070 °C and after retention for 10 min cooled down to 1020 °C and kept for 20 h. The microstructure of CCTO ceramics sintered by conventional and TSS techniques was examined by FE-SEM method; the electrical properties were investigated in medium frequency (MF) range (42 Hz-5 MHz) and in the microwave (MW) range of frequencies. Electrical properties of the sintered CCTO ceramics were correlated to the samples microstructure. Finally, we have shown that appropriate choice of sintering conditions is important for preparation of high-quality CCTO ceramics with high dielectric permittivity in the kilohertz range as well as at the resonant frequency.",
publisher = "Hoboken, NJ : John Wiley & Sons",
journal = "Processing and Properties of Advanced Ceramics and Composites V",
booktitle = "Sintering Effects on Microstructure and Electrical Properties of CaCu3Ti4O12 Ceramics",
pages = "337-348",
doi = "10.1002/9781118744109.ch37",
url = "https://hdl.handle.net/21.15107/rcub_dais_511"
}

Marković, S., Lukić, M. J., Jovalekić, Č., Škapin, S. D., Suvorov, D.,& Uskoković, D.. (2013). Sintering Effects on Microstructure and Electrical Properties of CaCu3Ti4O12 Ceramics. in Processing and Properties of Advanced Ceramics and Composites V
Hoboken, NJ : John Wiley & Sons., 337-348.
https://doi.org/10.1002/9781118744109.ch37
https://hdl.handle.net/21.15107/rcub_dais_511

Marković S, Lukić MJ, Jovalekić Č, Škapin SD, Suvorov D, Uskoković D. Sintering Effects on Microstructure and Electrical Properties of CaCu3Ti4O12 Ceramics. in Processing and Properties of Advanced Ceramics and Composites V. 2013;:337-348.
doi:10.1002/9781118744109.ch37
https://hdl.handle.net/21.15107/rcub_dais_511 .

Marković, Smilja, Lukić, Miodrag J., Jovalekić, Čedomir, Škapin, Srečo Davor, Suvorov, Danilo, Uskoković, Dragan, "Sintering Effects on Microstructure and Electrical Properties of CaCu3Ti4O12 Ceramics" in Processing and Properties of Advanced Ceramics and Composites V (2013):337-348,
https://doi.org/10.1002/9781118744109.ch37 .,
https://hdl.handle.net/21.15107/rcub_dais_511 .

TY  - CONF
AU  - Marković, Smilja
AU  - Škapin, Srečo Davor
AU  - Suvorov, Danilo
AU  - Uskoković, Dragan
PY  - 2013
UR  - https://dais.sanu.ac.rs/123456789/397
AB  - Materials exhibiting a high dielectric constant with low sensitivity to temperature variation have great technological significance. Recently, the colossal permittivity of ~104-105 in the kilohertz region at room temperature, and good stability over the temperature range from 100 to 600 K was discovered for compounds of general formula AC3B4O12, where CaCu3Ti4O12 (CCTO) has remarkable interest. However, it was found that CCTO ceramic-electrode interfaces have an impact on electrical properties; actually, energy barriers could be induced by low ceramicelectrode contact resulting in the decrease of permittivity. The ceramic-electrode contact problem could be solved by introducing interlayer material with crystal structure and close lattice parameters as CCTO and with metallic cation (at B position) as it’ll be further used for electrode. In this work, materials used for preparation of electronic ceramics were CCTO and CaCu3Ru4O12 (CCRO). The role of CCRO was to decrease the strains at the CCTO-electrode interfaces. CCTO and CCRO powders were prepared by precipitation, and successive calcinations to obtained single phased materials. The synthesized powders were characterized by XRD, FE-SEM and TEM techniques. The sinterability of CCTO and CCRO powders was investigated by heating microscopy. Powders were uniaxially pressed into pellets (ø 6 mm) and sintered up to 1100 °C,with 2, 5, 10 and 20 o/min. The recorded densification curves were used for: (1) estimation of linear coefficient of thermal expansion (CTE), and furthermore, (2) for choosing sintering conditions for fabrication of functionally graded CCRO/CCTO/CCRO ceramics. The microstructure of prepared FGMs was examined by FE-SEM method. The electrical properties of FGMs were investigated in medium frequency (MF) and microwave (MW) regions. For the MF measurements, Au electrodes were deposited at CCRO surfaces of FGMs. Measurements were done in frequency interval 42 Hz - 5 MHz, in air atmosphere, during cooling from 400 to 25 °C; an applied ac voltage was 1 V. The resonance measurements in the 10 MHz - 67 GHz range were done in a conventional set up (without electrodes). Electrical properties of the FGMs were correlated to the microstructure and sample-electrode interfaces.
PB  - Belgrade : Materials Research Society of Serbia
C3  - The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts
T1  - CaCu3Ru4O12/CaCu3Ti4O12/CaCu3Ru4O12 functionally graded electronic ceramics
SP  - 94
EP  - 94
UR  - https://hdl.handle.net/21.15107/rcub_dais_397
ER  - 

@conference{
author = "Marković, Smilja and Škapin, Srečo Davor and Suvorov, Danilo and Uskoković, Dragan",
year = "2013",
abstract = "Materials exhibiting a high dielectric constant with low sensitivity to temperature variation have great technological significance. Recently, the colossal permittivity of ~104-105 in the kilohertz region at room temperature, and good stability over the temperature range from 100 to 600 K was discovered for compounds of general formula AC3B4O12, where CaCu3Ti4O12 (CCTO) has remarkable interest. However, it was found that CCTO ceramic-electrode interfaces have an impact on electrical properties; actually, energy barriers could be induced by low ceramicelectrode contact resulting in the decrease of permittivity. The ceramic-electrode contact problem could be solved by introducing interlayer material with crystal structure and close lattice parameters as CCTO and with metallic cation (at B position) as it’ll be further used for electrode. In this work, materials used for preparation of electronic ceramics were CCTO and CaCu3Ru4O12 (CCRO). The role of CCRO was to decrease the strains at the CCTO-electrode interfaces. CCTO and CCRO powders were prepared by precipitation, and successive calcinations to obtained single phased materials. The synthesized powders were characterized by XRD, FE-SEM and TEM techniques. The sinterability of CCTO and CCRO powders was investigated by heating microscopy. Powders were uniaxially pressed into pellets (ø 6 mm) and sintered up to 1100 °C,with 2, 5, 10 and 20 o/min. The recorded densification curves were used for: (1) estimation of linear coefficient of thermal expansion (CTE), and furthermore, (2) for choosing sintering conditions for fabrication of functionally graded CCRO/CCTO/CCRO ceramics. The microstructure of prepared FGMs was examined by FE-SEM method. The electrical properties of FGMs were investigated in medium frequency (MF) and microwave (MW) regions. For the MF measurements, Au electrodes were deposited at CCRO surfaces of FGMs. Measurements were done in frequency interval 42 Hz - 5 MHz, in air atmosphere, during cooling from 400 to 25 °C; an applied ac voltage was 1 V. The resonance measurements in the 10 MHz - 67 GHz range were done in a conventional set up (without electrodes). Electrical properties of the FGMs were correlated to the microstructure and sample-electrode interfaces.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts",
title = "CaCu3Ru4O12/CaCu3Ti4O12/CaCu3Ru4O12 functionally graded electronic ceramics",
pages = "94-94",
url = "https://hdl.handle.net/21.15107/rcub_dais_397"
}

Marković, S., Škapin, S. D., Suvorov, D.,& Uskoković, D.. (2013). CaCu3Ru4O12/CaCu3Ti4O12/CaCu3Ru4O12 functionally graded electronic ceramics. in The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts
Belgrade : Materials Research Society of Serbia., 94-94.
https://hdl.handle.net/21.15107/rcub_dais_397

Marković S, Škapin SD, Suvorov D, Uskoković D. CaCu3Ru4O12/CaCu3Ti4O12/CaCu3Ru4O12 functionally graded electronic ceramics. in The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts. 2013;:94-94.
https://hdl.handle.net/21.15107/rcub_dais_397 .

Marković, Smilja, Škapin, Srečo Davor, Suvorov, Danilo, Uskoković, Dragan, "CaCu3Ru4O12/CaCu3Ti4O12/CaCu3Ru4O12 functionally graded electronic ceramics" in The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts (2013):94-94,
https://hdl.handle.net/21.15107/rcub_dais_397 .

TY  - CONF
AU  - Marković, Smilja
AU  - Lukić, Miodrag J.
AU  - Jovalekić, Čedomir
AU  - Škapin, Srečo Davor
AU  - Suvorov, Danilo
AU  - Uskoković, Dragan
PY  - 2012
UR  - https://dais.sanu.ac.rs/123456789/437
AB  - A perovskite-type compound, calcium copper titanate (CaCu3Ti4O12, CCTO) attracted ever increasing attention for its practical applications in microelectronics, especially for preparation of capacitors and memory devices. CCTO ceramics are very attractive because of their giant dielectric constant (∼104−105) in the kilohertz region at room temperature, and their good stability over a wide temperature range from 100 to 600 K. Here, CCTO powder was prepared by solid state reaction between CaCO3, CuO and TiO2 at 1000 °C for 12 hours. Synthesized powder was characterized by XRD, FTIR and FESEM techniques. The sinterability of CCTO powders was investigated by heating microscopy. Powder was uniaxially pressed into pallets (Ø 6 mm) and sintered up to 1100 °C, with 2, 5, 10 and 20 °/min. The recorded shrinkage curves were used for calculation of activation energy for sintering process, and furthermore, for choosing two step sintering (TSS) conditions. By TSS the samples were heated up to 1050 (1070) °C and after retention for 10 min the cooled down to 1000 (1020) °C and kept for 20 h. The microstructure of CCTO ceramics sintered by conventional and TSS techniques was examined by FESEM method; the electrical properties were investigated by ac impedance spectroscopy over the ranges 1000 - 25 °C and 40 Hz - 5 MHz. Electrical properties of the sintered CCTO ceramics were correlated to the samples microstructure. Finally, we have shown that appropriate choice of sintering conditions is important for preparation of high-quality CCTO ceramics with giant dielectric permittivity.
PB  - Belgrade : Materials Research Society of Serbia
C3  - The Fourteenth Annual Conference YUCOMAT 2012: Programme and the Book of Abstracts
T1  - Sintering effects on microstructure and dielectric properties of CCTO ceramics
SP  - 74
EP  - 74
UR  - https://hdl.handle.net/21.15107/rcub_dais_437
ER  - 

@conference{
author = "Marković, Smilja and Lukić, Miodrag J. and Jovalekić, Čedomir and Škapin, Srečo Davor and Suvorov, Danilo and Uskoković, Dragan",
year = "2012",
abstract = "A perovskite-type compound, calcium copper titanate (CaCu3Ti4O12, CCTO) attracted ever increasing attention for its practical applications in microelectronics, especially for preparation of capacitors and memory devices. CCTO ceramics are very attractive because of their giant dielectric constant (∼104−105) in the kilohertz region at room temperature, and their good stability over a wide temperature range from 100 to 600 K. Here, CCTO powder was prepared by solid state reaction between CaCO3, CuO and TiO2 at 1000 °C for 12 hours. Synthesized powder was characterized by XRD, FTIR and FESEM techniques. The sinterability of CCTO powders was investigated by heating microscopy. Powder was uniaxially pressed into pallets (Ø 6 mm) and sintered up to 1100 °C, with 2, 5, 10 and 20 °/min. The recorded shrinkage curves were used for calculation of activation energy for sintering process, and furthermore, for choosing two step sintering (TSS) conditions. By TSS the samples were heated up to 1050 (1070) °C and after retention for 10 min the cooled down to 1000 (1020) °C and kept for 20 h. The microstructure of CCTO ceramics sintered by conventional and TSS techniques was examined by FESEM method; the electrical properties were investigated by ac impedance spectroscopy over the ranges 1000 - 25 °C and 40 Hz - 5 MHz. Electrical properties of the sintered CCTO ceramics were correlated to the samples microstructure. Finally, we have shown that appropriate choice of sintering conditions is important for preparation of high-quality CCTO ceramics with giant dielectric permittivity.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "The Fourteenth Annual Conference YUCOMAT 2012: Programme and the Book of Abstracts",
title = "Sintering effects on microstructure and dielectric properties of CCTO ceramics",
pages = "74-74",
url = "https://hdl.handle.net/21.15107/rcub_dais_437"
}

Marković, S., Lukić, M. J., Jovalekić, Č., Škapin, S. D., Suvorov, D.,& Uskoković, D.. (2012). Sintering effects on microstructure and dielectric properties of CCTO ceramics. in The Fourteenth Annual Conference YUCOMAT 2012: Programme and the Book of Abstracts
Belgrade : Materials Research Society of Serbia., 74-74.
https://hdl.handle.net/21.15107/rcub_dais_437

Marković S, Lukić MJ, Jovalekić Č, Škapin SD, Suvorov D, Uskoković D. Sintering effects on microstructure and dielectric properties of CCTO ceramics. in The Fourteenth Annual Conference YUCOMAT 2012: Programme and the Book of Abstracts. 2012;:74-74.
https://hdl.handle.net/21.15107/rcub_dais_437 .

Marković, Smilja, Lukić, Miodrag J., Jovalekić, Čedomir, Škapin, Srečo Davor, Suvorov, Danilo, Uskoković, Dragan, "Sintering effects on microstructure and dielectric properties of CCTO ceramics" in The Fourteenth Annual Conference YUCOMAT 2012: Programme and the Book of Abstracts (2012):74-74,
https://hdl.handle.net/21.15107/rcub_dais_437 .

TY  - CONF
AU  - Vukomanović, Marija
AU  - Repnik, U.
AU  - Škapin, Srečo Davor
AU  - Uskoković, Dragan
AU  - Suvorov, Danilo
PY  - 2011
UR  - https://dais.sanu.ac.rs/123456789/689
AB  - Hydroxyapatite, as a major constituent of the inorganic part of natural human bones, is a natural choice and one of the most frequently applied materials for the reparation and regeneration of bone tissue. The formation of composites based on HAp, the incorporation of foreign ions within its structure and/or the functionalization of their surfaces allow improvements to the morphological, structural and surface properties. Such improvements can be utilized to increase the material quality for applications in dentistry and orthopedics as well to extend the potential applicability in other fields of biomedicine. Hydroxyapatite/silver (HAp/Ag) nanocomposite particles were formed using the sonochemical method. Particles were formed from HAp rods with silver (present in the form of ions) incorporated within the apatite structure and/or metallic particles, embedded into apatite rods and metallic particles attached to the surfaces of these rods. The so obtained materials were tested for antibacterial activity. The p presence of the bacterial growth-inhibition zone around the discs made of composite material and the fluorescence dye detection on the surface of the HAp/Ag composite (corresponding to the labeled live and dead bacteria) proved that the composite was active against both Gram-positive and Gram-negative bacteria. In addition, it was determined that the minimal inhibition concentration (MIC), i.e., the minimal concentration of HAp/Ag composite, which is able to inhibit the growth of bacteria, was higher for Grampositive (MIC = 0.7-0.8 mg/ml) when compared to Gram-negative (MIC = 0.6-0.7 mg/ml) bacteria. The same effect was determined during the investigation of the minimal bactericidal concentration (MBC) of the HAp/Ag composite against the same representatives of Grampositive and Gram-negative bacteria. The obtained concentrations of the HAp/Ag composite which were able to manifest the bactericidal effect were used for an investigation of the toxicity against the representatives of healthy and cancer-modified cell lines. The toxicity of a composite was investigated in vitro and for that purpose the IMR-90 human lung embryonic fibroblast and U-2 OS human osteosarcoma cell lines were applied. In the presentation the antibacterial activity of the HAp/Ag composite and its toxicity against human cells will be discussed.
PB  - Belgrade : Materials Research Society of Serbia
C3  - The Thirteenth Annual Conference YUCOMAT 2011: Programme and the Book of Abstracts
T1  - Antibacterial activity and cytotoxicity of hydroxyapatite/silver nanocomposites synthesized by a sonochemical approach
SP  - 69
EP  - 69
UR  - https://hdl.handle.net/21.15107/rcub_dais_689
ER  - 

@conference{
author = "Vukomanović, Marija and Repnik, U. and Škapin, Srečo Davor and Uskoković, Dragan and Suvorov, Danilo",
year = "2011",
abstract = "Hydroxyapatite, as a major constituent of the inorganic part of natural human bones, is a natural choice and one of the most frequently applied materials for the reparation and regeneration of bone tissue. The formation of composites based on HAp, the incorporation of foreign ions within its structure and/or the functionalization of their surfaces allow improvements to the morphological, structural and surface properties. Such improvements can be utilized to increase the material quality for applications in dentistry and orthopedics as well to extend the potential applicability in other fields of biomedicine. Hydroxyapatite/silver (HAp/Ag) nanocomposite particles were formed using the sonochemical method. Particles were formed from HAp rods with silver (present in the form of ions) incorporated within the apatite structure and/or metallic particles, embedded into apatite rods and metallic particles attached to the surfaces of these rods. The so obtained materials were tested for antibacterial activity. The p presence of the bacterial growth-inhibition zone around the discs made of composite material and the fluorescence dye detection on the surface of the HAp/Ag composite (corresponding to the labeled live and dead bacteria) proved that the composite was active against both Gram-positive and Gram-negative bacteria. In addition, it was determined that the minimal inhibition concentration (MIC), i.e., the minimal concentration of HAp/Ag composite, which is able to inhibit the growth of bacteria, was higher for Grampositive (MIC = 0.7-0.8 mg/ml) when compared to Gram-negative (MIC = 0.6-0.7 mg/ml) bacteria. The same effect was determined during the investigation of the minimal bactericidal concentration (MBC) of the HAp/Ag composite against the same representatives of Grampositive and Gram-negative bacteria. The obtained concentrations of the HAp/Ag composite which were able to manifest the bactericidal effect were used for an investigation of the toxicity against the representatives of healthy and cancer-modified cell lines. The toxicity of a composite was investigated in vitro and for that purpose the IMR-90 human lung embryonic fibroblast and U-2 OS human osteosarcoma cell lines were applied. In the presentation the antibacterial activity of the HAp/Ag composite and its toxicity against human cells will be discussed.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "The Thirteenth Annual Conference YUCOMAT 2011: Programme and the Book of Abstracts",
title = "Antibacterial activity and cytotoxicity of hydroxyapatite/silver nanocomposites synthesized by a sonochemical approach",
pages = "69-69",
url = "https://hdl.handle.net/21.15107/rcub_dais_689"
}

Vukomanović, M., Repnik, U., Škapin, S. D., Uskoković, D.,& Suvorov, D.. (2011). Antibacterial activity and cytotoxicity of hydroxyapatite/silver nanocomposites synthesized by a sonochemical approach. in The Thirteenth Annual Conference YUCOMAT 2011: Programme and the Book of Abstracts
Belgrade : Materials Research Society of Serbia., 69-69.
https://hdl.handle.net/21.15107/rcub_dais_689

Vukomanović M, Repnik U, Škapin SD, Uskoković D, Suvorov D. Antibacterial activity and cytotoxicity of hydroxyapatite/silver nanocomposites synthesized by a sonochemical approach. in The Thirteenth Annual Conference YUCOMAT 2011: Programme and the Book of Abstracts. 2011;:69-69.
https://hdl.handle.net/21.15107/rcub_dais_689 .

Vukomanović, Marija, Repnik, U., Škapin, Srečo Davor, Uskoković, Dragan, Suvorov, Danilo, "Antibacterial activity and cytotoxicity of hydroxyapatite/silver nanocomposites synthesized by a sonochemical approach" in The Thirteenth Annual Conference YUCOMAT 2011: Programme and the Book of Abstracts (2011):69-69,
https://hdl.handle.net/21.15107/rcub_dais_689 .

TY  - CONF
AU  - Vukomanović, Marija
AU  - Uskoković, Dragan
AU  - Škapin, Srečo Davor
AU  - Suvorov, Danilo
PY  - 2011
UR  - https://dais.sanu.ac.rs/123456789/700
AB  - Sonochemical method has a significant role in structural and morphological properties especially for the synthesis of noble metal nanoparticles. Ln the case of these materials reactive radicals formed during sonification are involved in reduction process. Depends on the rate of formation of these particles the rate of their growth is affected resulting in different structure and morphology. Homogeneous sonochemically-assisted precipitation was applied for the synthesis of platinum (Pt) nanoparticles and their composite with hydroxyapatite (HAp/Pt). In this method urea was used for complexation of Pt and/or precipitation of HAp while chloroplatinic acid (H2PtCI6, Tm=60oC) and platinum(ll)2,4 pentanedionat (CIOH140,J>t, Tm=250oC) were applied as Pt-precursors with different thermal and reduction potential properties. In the case of H2PtCI6, pre-fonned platinum-complex formed submicrometer spheres with smooth surfaces. After reduction these spheres kept their size and turned into nanostructures. A similar transformation was noticed when C lOH l40 4Pt was applied. However, in this case pre-formed platinum-complex particles had polyhedral shapes and further reduction resulted in the same shape of formed Pt nanostructures. Morphological and structural properties of Pt obtained during formation of their composites with HAp changed further on. Application of both precursors resulted in formation of plate- and rod- like shape of Hap. However, composites obtained from H2PtCl6 resulted in formation of nanosized while CloHI404Pt resulted in formation of micrometer sized HAp particles. Pt particles attached on the surface of Hap particles were nanosized and non-agglomerated spheres. Obtained results show that sonochemical method can be Llsed for tailoring the properties of Pt nanoparticles by selection of the type of precursor.
PB  - Ljubljana : Institut "Jožef Stefan"
C3  - 5. dan mladih raziskovalcev, Ljubljana, Februar 2011: [Program in povzetki]
T1  - Sonochemical synthesis of platinum nanoparticles and their composite with hydroxyapatite
SP  - 70
EP  - 70
UR  - https://hdl.handle.net/21.15107/rcub_dais_700
ER  - 

@conference{
author = "Vukomanović, Marija and Uskoković, Dragan and Škapin, Srečo Davor and Suvorov, Danilo",
year = "2011",
abstract = "Sonochemical method has a significant role in structural and morphological properties especially for the synthesis of noble metal nanoparticles. Ln the case of these materials reactive radicals formed during sonification are involved in reduction process. Depends on the rate of formation of these particles the rate of their growth is affected resulting in different structure and morphology. Homogeneous sonochemically-assisted precipitation was applied for the synthesis of platinum (Pt) nanoparticles and their composite with hydroxyapatite (HAp/Pt). In this method urea was used for complexation of Pt and/or precipitation of HAp while chloroplatinic acid (H2PtCI6, Tm=60oC) and platinum(ll)2,4 pentanedionat (CIOH140,J>t, Tm=250oC) were applied as Pt-precursors with different thermal and reduction potential properties. In the case of H2PtCI6, pre-fonned platinum-complex formed submicrometer spheres with smooth surfaces. After reduction these spheres kept their size and turned into nanostructures. A similar transformation was noticed when C lOH l40 4Pt was applied. However, in this case pre-formed platinum-complex particles had polyhedral shapes and further reduction resulted in the same shape of formed Pt nanostructures. Morphological and structural properties of Pt obtained during formation of their composites with HAp changed further on. Application of both precursors resulted in formation of plate- and rod- like shape of Hap. However, composites obtained from H2PtCl6 resulted in formation of nanosized while CloHI404Pt resulted in formation of micrometer sized HAp particles. Pt particles attached on the surface of Hap particles were nanosized and non-agglomerated spheres. Obtained results show that sonochemical method can be Llsed for tailoring the properties of Pt nanoparticles by selection of the type of precursor.",
publisher = "Ljubljana : Institut "Jožef Stefan"",
journal = "5. dan mladih raziskovalcev, Ljubljana, Februar 2011: [Program in povzetki]",
title = "Sonochemical synthesis of platinum nanoparticles and their composite with hydroxyapatite",
pages = "70-70",
url = "https://hdl.handle.net/21.15107/rcub_dais_700"
}

Vukomanović, M., Uskoković, D., Škapin, S. D.,& Suvorov, D.. (2011). Sonochemical synthesis of platinum nanoparticles and their composite with hydroxyapatite. in 5. dan mladih raziskovalcev, Ljubljana, Februar 2011: [Program in povzetki]
Ljubljana : Institut "Jožef Stefan"., 70-70.
https://hdl.handle.net/21.15107/rcub_dais_700

Vukomanović M, Uskoković D, Škapin SD, Suvorov D. Sonochemical synthesis of platinum nanoparticles and their composite with hydroxyapatite. in 5. dan mladih raziskovalcev, Ljubljana, Februar 2011: [Program in povzetki]. 2011;:70-70.
https://hdl.handle.net/21.15107/rcub_dais_700 .

Vukomanović, Marija, Uskoković, Dragan, Škapin, Srečo Davor, Suvorov, Danilo, "Sonochemical synthesis of platinum nanoparticles and their composite with hydroxyapatite" in 5. dan mladih raziskovalcev, Ljubljana, Februar 2011: [Program in povzetki] (2011):70-70,
https://hdl.handle.net/21.15107/rcub_dais_700 .

TY  - CONF
AU  - Vukomanović, Marija
AU  - Otoničar, Mojca
AU  - Uskoković, Dragan
AU  - Škapin, Srečo Davor
AU  - Suvorov, Danilo
PY  - 2010
UR  - https://dais.sanu.ac.rs/123456789/217
AB  - Poster presented at Adriatic School of Nanoscience – ASON-1, Dubrovnik, Croatia, September 19–23, 2010
T1  - Silver nanoparticels obtained by sonochemical route
UR  - https://hdl.handle.net/21.15107/rcub_dais_217
ER  - 

@conference{
author = "Vukomanović, Marija and Otoničar, Mojca and Uskoković, Dragan and Škapin, Srečo Davor and Suvorov, Danilo",
year = "2010",
abstract = "Poster presented at Adriatic School of Nanoscience – ASON-1, Dubrovnik, Croatia, September 19–23, 2010",
title = "Silver nanoparticels obtained by sonochemical route",
url = "https://hdl.handle.net/21.15107/rcub_dais_217"
}

Vukomanović, M., Otoničar, M., Uskoković, D., Škapin, S. D.,& Suvorov, D.. (2010). Silver nanoparticels obtained by sonochemical route. .
https://hdl.handle.net/21.15107/rcub_dais_217

Vukomanović M, Otoničar M, Uskoković D, Škapin SD, Suvorov D. Silver nanoparticels obtained by sonochemical route. 2010;.
https://hdl.handle.net/21.15107/rcub_dais_217 .

Vukomanović, Marija, Otoničar, Mojca, Uskoković, Dragan, Škapin, Srečo Davor, Suvorov, Danilo, "Silver nanoparticels obtained by sonochemical route" (2010),
https://hdl.handle.net/21.15107/rcub_dais_217 .

TY  - CONF
AU  - Vukomanović, Marija
AU  - Repnik, U.
AU  - Zavašnik, T.
AU  - Škapin, Srečo Davor
AU  - Uskoković, Dragan
AU  - Suvorov, Danilo
PY  - 2010
UR  - https://dais.sanu.ac.rs/123456789/3452
AB  - Hydroxyapatite containing silver nanoparticles (HAp/Ag) was synthesized by homogeneous sonochemical metod. Morphology of obtained particles was formed of micrometer-sized rod-like HAp with nanosized silver sphere-like particles attached to their surface. So obtained material was tested for interaction with bacteria. For that purpose composites with three different contents of silver were prepared and their interactions with two different types of bacteria were studied. Escherichia coli was used as a representative of Gram negative while Staphylococcus aureus was applied as a representative of Gram positive bacteria. In the case of E. coli wider inhibition zone without presence of bacteria and with a layer of inactive bacteria near the surface of material was obtained. In this case obtained antibacterial effect was not concentration dependant. In the case of S. aureus, inhibition zone was narrower with the presence of modified bacteria in inhibition zone. Obtained antibacterial response pronounced dependence on concentration of silver within composite. According to results achieved with this investigation we concluded that HAp/Ag composite is effective against both, Gram positive and Gram negative bacteria and shows stronger activity against E. coli.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - Program and the Book of Abstracts / Ninth Young Researchers Conference Materials Sciences and Engineering, December 20–22, 2010, Belgrade, Serbia
T1  - Antibacterial activity of hydroxyapatite/silver nanocomposite
SP  - 15
EP  - 15
UR  - https://hdl.handle.net/21.15107/rcub_dais_3452
ER  - 

@conference{
author = "Vukomanović, Marija and Repnik, U. and Zavašnik, T. and Škapin, Srečo Davor and Uskoković, Dragan and Suvorov, Danilo",
year = "2010",
abstract = "Hydroxyapatite containing silver nanoparticles (HAp/Ag) was synthesized by homogeneous sonochemical metod. Morphology of obtained particles was formed of micrometer-sized rod-like HAp with nanosized silver sphere-like particles attached to their surface. So obtained material was tested for interaction with bacteria. For that purpose composites with three different contents of silver were prepared and their interactions with two different types of bacteria were studied. Escherichia coli was used as a representative of Gram negative while Staphylococcus aureus was applied as a representative of Gram positive bacteria. In the case of E. coli wider inhibition zone without presence of bacteria and with a layer of inactive bacteria near the surface of material was obtained. In this case obtained antibacterial effect was not concentration dependant. In the case of S. aureus, inhibition zone was narrower with the presence of modified bacteria in inhibition zone. Obtained antibacterial response pronounced dependence on concentration of silver within composite. According to results achieved with this investigation we concluded that HAp/Ag composite is effective against both, Gram positive and Gram negative bacteria and shows stronger activity against E. coli.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "Program and the Book of Abstracts / Ninth Young Researchers Conference Materials Sciences and Engineering, December 20–22, 2010, Belgrade, Serbia",
title = "Antibacterial activity of hydroxyapatite/silver nanocomposite",
pages = "15-15",
url = "https://hdl.handle.net/21.15107/rcub_dais_3452"
}

Vukomanović, M., Repnik, U., Zavašnik, T., Škapin, S. D., Uskoković, D.,& Suvorov, D.. (2010). Antibacterial activity of hydroxyapatite/silver nanocomposite. in Program and the Book of Abstracts / Ninth Young Researchers Conference Materials Sciences and Engineering, December 20–22, 2010, Belgrade, Serbia
Belgrade : Institute of Technical Sciences of SASA., 15-15.
https://hdl.handle.net/21.15107/rcub_dais_3452

Vukomanović M, Repnik U, Zavašnik T, Škapin SD, Uskoković D, Suvorov D. Antibacterial activity of hydroxyapatite/silver nanocomposite. in Program and the Book of Abstracts / Ninth Young Researchers Conference Materials Sciences and Engineering, December 20–22, 2010, Belgrade, Serbia. 2010;:15-15.
https://hdl.handle.net/21.15107/rcub_dais_3452 .

Vukomanović, Marija, Repnik, U., Zavašnik, T., Škapin, Srečo Davor, Uskoković, Dragan, Suvorov, Danilo, "Antibacterial activity of hydroxyapatite/silver nanocomposite" in Program and the Book of Abstracts / Ninth Young Researchers Conference Materials Sciences and Engineering, December 20–22, 2010, Belgrade, Serbia (2010):15-15,
https://hdl.handle.net/21.15107/rcub_dais_3452 .