• 3 Structural, morphological and electrical properties of sintered Fe2O3/TiO2 nanopowder mixtures 

      Đurić, Zorka; Aleksić, Obrad; Nikolić, Maria Vesna (Belgrade : Institute of Technical Sciences of SASA, 2013)
      Starting nanopowders of TiO2 (anatase 99.7%) and a-Fe2O3 (hematite) were mixed in the weight ratio 60:40 and 40:60. Green samples were sintered in the temperature range 750-1250oC in air. Structural, morphological and ...
    • Analysis and modeling of sintering of Sr-hexaferrite produced by PIM technology 

      Zlatkov, B. S.; Nikolić, Maria Vesna; Zeljković, Vladimir; Obradović, Nina; Pavlović, Vladimir B.; Aleksić, Obrad (Belgrade : International Institute for the Science of Sintering, 2011)
      The powder injection moulding (PIM) technology is lately becoming more and more significant due to complex design possibilities and good repeatability. This technology requires optimization of all steps starting with ...
    • Analysis and optimization of a thermal sensor system for measuring water flow 

      Aleksić, Obrad; Nikolić, Maria Vesna; Luković, Miloljub D.; Aleksić, S. O.; Nikolić, Pantelija (Elsevier, 2013)
      A simple thermal sensor system was designed for measuring water flow in the water mains using the heat loss principle with a NTC thick film segmented thermistor as a self-heating sensor. Thick film segmented thermistors ...
    • Analysis of electronic properties of pseudobrookite thick films with possible application for NO gas sensing 

      Mišković, Goran; Luković, Miloljub D.; Nikolić, Maria Vesna; Vasiljević, Zorka; Nicolics, Johann; Aleksić, Obrad (IEEE, 2016)
      Two pseudobrookite (PSB) containing pastes were composed of a mixture of starting nanopowders of hematite (a-Fe2O3) and anatase (TiO2) in the molar ratios 1:1 (referred to as PSB-1) and 1:1.5 (referred to as PSB-1.5), ...
    • Changes of Structural, Optical and Electrical Properties of Nickel-Manganite Ceramics Induced by Additional Mechanical Activation 

      Nikolić, Maria Vesna; Savić, Slavica; Aleksić, Obrad; Paraskevopoulos, Konstantinos M.; Zorba, T. T.; Blagojević, Vladimir; Nikolić, Pantelija (2007)
      Poster presented at the 10th International Conference and Exhibition of the European Ceramic Society, Berlin, June 17-21, 2007
    • Characterisation of Mn0.63Zn0.37Fe2O4 powders after intensive milling and subsequent thermal treatment 

      Labus, Nebojša; Vasiljević, Zorka; Aleksić, Obrad; Luković, Miloljub D.; Marković, Smilja; Pavlović, Vladimir B.; Mentus, Slavko; Nikolić, Maria Vesna (Science of Sintering, 2017)
      Commercial Mn-Zn powder (Mn0.63Zn0.37Fe2O4, 93 wt. % and Fe2O3 7 wt. %) was milled 0.5, 1, 2 and 4 hours in a planetary ball mill. The goal was to observe intensive milling influences on oxidation and reduction processes ...
    • Characterisation of Mn0.63Zn0.37Fe2O4 powders after intensive milling and subsequent thermal treatment 

      Labus, Nebojša; Vasiljević, Zorka; Aleksić, Obrad; Vuković, Miloljub; Marković, Smilja; Pavlović, Vladimir B.; Mentus, Slavko; Nikolić, Maria Vesna (Belgrade : Serbian Ceramic Society, 2016)
      Commercial Mn-Zn powder (Mn0.63Zn0.37Fe2O4, 93 wt. % and Fe2O3 7 wt. %) was milled 0.5, 1, 2 and 4 hours in a planetary ball mill. Powders were characterized with XRD, SEM and particle seizer. Subsequent heating was monitored ...
    • Dielectric properties, complex impedance and electrical conductivity of Fe2TiO5 nanopowder compacts and bulk samples at elevated temperatures 

      Nikolić, Maria Vesna; Sekulić, D. L.; Vasiljević, Zorka; Luković, Miloljub D.; Pavlović, Vladimir B.; Aleksić, Obrad (Springer US, 2016)
      In this work we have investigated changes in dielectric properties, electrical conductivity and complex impedance of Fe2TiO5 nanopowder compacts and bulk samples as a function of elevated temperature (room to 423 K compacts, ...
    • Fabrication, characterization and photoelectrochemical behavior of Fe2TiO5 screen printed thick films 

      Vasiljević, Zorka; Aleksić, Obrad; Luković, Miloljub D.; Vujković, Milica; Pavlović, Vladimir B.; Labus, Nebojša; Nikolić, Maria Vesna (Belgrade : Institute of Technical Sciences of the Serbian Academz of Sciences and Arts, 2016)
      Pseudobrookite paste was composed of a mixture of starting nanopowders of hematite (α-Fe2O3) and anatase (TiO2) in the molar ratio 1:1.5, organic vehicle and glass frit. The paste was screen printed on on fluorine-doped ...
    • Far infrared properties of sintered PbTe doped with boron 

      Nikolić, Pantelija; Paraskevopoulos, Konstantinos M.; Zorba, T. T.; Pavlidou, Eleni; Kantiranis, N.; Vujatović, Stevan S.; Aleksić, Obrad; Nikolić, Maria Vesna; Ivetić, Tamara; Savić, Slavica; Labus, Nebojša; Blagojević, Vladimir (Belgrade : International Institute for the Science of Sintering, 2007)
      Far infrared spectra of sintered PbTe doped with boron were analyzed. The measured infrared spectra were fitted using a modified plasmon-phonnon interaction model with two additional oscillators (at about 195 cm-1 and 285 ...
    • Far infrared reflectivity spectra of lead-telluride doped with Mn and Yb 

      Nikolić, Pantelija; Paraskevopoulos, Konstantinos M.; Zorba, T. T.; Đurić, Zorka; Pavlidou, Eleni; Vujatović, Stevan S.; Blagojević, Vladimir; Aleksić, Obrad; Nikolić, Maria Vesna (INOE Publishing House, 2013)
      PbTe single crystal samples doped with Mn and Yb were grown using the Bridgman method. Far infrared reflectivity spectra were measured at room temperature for samples with different impurity concentrations (total impurity ...
    • Far infrared study of local impurity modes of Boron-doped PbTe 

      Nikolić, Pantelija; Paraskevopoulos, Konstantinos M.; Zachariadis, G.; Valasiadis, O.; Zorba, T. T.; Vujatovic, S.; Nikolić, N.; Aleksić, Obrad; Ivetić, Tamara; Cvetković, O.; Blagojević, Vladimir; Nikolić, Maria Vesna (Springer US, 2012)
      PbTe single crystals, doped with B, were grown using the Bridgman method. Far infrared spectra were measured in the temperature range between 10 K and room temperature. The experimental spectra were numerically analyzed, ...
    • Geometrical and electrical properties of NTC polycrystalline thermistors vs. Changes of sintering parameters 

      Savić, Slavica; Aleksić, Obrad; Nikolić, Pantelija; Luković, Danijela (Belgrade : International Institute for the Science of Sintering, 2006)
      NTC thermistor powder was made of a Mn, Ni, Fe and Co oxide mixture calcinated at 1050°C / 60 min. The powder was milled in a ball mill down to an average particle diameter of 0.9 μm. Small disc shaped pills of the powder ...
    • Impedance response of pseudobrookite thick films with a sandwich configuration 

      Luković, Miloljub D.; Nikolić, Maria Vesna; Vasiljević, Zorka; Blaž, Nelu; Luković, Snežana; Aleksić, Obrad (IEEE, 2017)
      We have investigated the impedance response of pseudobrookite thick films screen printed on alumina substrate in the temperature interval from room temperature to 350 °C in the frequency range 100 Hz-1 MHz. Two thick film ...
    • Influence of starting powder milling on magnetic properties of Mn-Zn ferrite 

      Milutinov, Miodrag M.; Nikolić, Maria Vesna; Luković, Snežana G.; Blaž, Nelu; Labus, Nebojša; Aleksić, Obrad; Živanov, Ljiljana D. (Novi Sad : Faculty of Technology, University of Novi Sad, 2017)
      In this paper, the influence of additional sieving and milling of starting industrial Mn-Zn powders on magnetic properties was investigated. The starting powder was milled for 60 minutes, followed by sieving through 325 ...
    • Influence of starting powder milling on structural properties, complex impedance, electrical conductivity and permeability of Mn–Zn ferrite 

      Milutinov, M.; Nikolić, Maria Vesna; Luković, Miloljub D.; Blaž, Nelu; Labus, Nebojša; Živanov, Lj. D.; Aleksić, Obrad (Springer, 2016)
      In this work we have analyzed how milling starting commercial Mn–Zn powder prior to the sintering process has an influence on electrical conductivity, relative permittivity and complex impedance in the frequency range from ...
    • Intrinsic resistivity of sintered nickel manganite vs. powder activation time and density 

      Savić, Slavica; Nikolić, Maria Vesna; Aleksić, Obrad; Slankamenac, Miloš; Živanov, M.; Nikolić, Pantelija (2007)
      Poster presented at the conference Fizika i tehnologija materijala (Physics and Technology of Materials), FITEM '07, Čačak, Serbia, August 6-8, 2007.
    • Intrinsic resistivity of sintered Nickel Manganite vs. powder activation time and density 

      Savić, Slavica; Nikolić, Maria Vesna; Aleksić, Obrad; Slankamenac, Miloš; Živanov, M.; Nikolić, Pantelija (Belgrade : International Institute for the Science of Sintering, 2008)
      In this work the DC resistivity of sintered nickel manganite NiMn2O4 (NTC thermistor material) was studied as a function of additional powder activation time in a planetary ball mill (0, 5, 15, 30, 45 and 60 min). The ...
    • Investigation of Zinc-Stannate Synthesis Using Photoacoustic Spectroscopy 

      Ivetić, Tamara; Aleksić, Obrad; Nikolić, Maria Vesna; Nikolić, Pantelija; Blagojević, Vladimir; Srećković, T.; Ristić, Momčilo M. (2005)
      Poster presented at the conference Fizika i tehnologija materijala - FITEM '05, Čačak, 2-5. avgust 2005.
    • Microstructure development and electrical properties of NiO doped alpha-Fe2O3 

      Ivetić, Tamara; Nikolić, Maria Vesna; Nikolić, Pantelija; Pavlović, Vladimir B.; Nikolić, Nataša; Aleksić, Obrad (2010)
      Poster presented at the 4th Serbian Congress for Microscopy, Belgrade, Serbia, 2010, October 11-12, 2010