• 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 ...
    • Changes of Structural, Optical and Electrical Properties of Nickel-Manganite Ceramics Induced by Additional Mechanical Activation 

      Nikolić, Maria Vesna; Savić, Slavica; Aleksić, Obrad; Paraskevopoulos, K. M.; Zorba, T. T.; Blagojević, V.; 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; 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, K. M.; Zorba, T. T.; Pavlidou, E.; Kantiranis, N.; Vujatović, S. S.; Aleksić, Obrad; Nikolić, Maria Vesna; Ivetić, Tamara; Savić, Slavica; Labus, Nebojša; Blagojević, V. (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, K. M.; Zorba, T. T.; Đurić, Zorka; Pavlidou, E.; Vujatović, S. S.; Blagojević, V.; 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, K. M.; Zachariadis, G.; Valasiadis, O.; Zorba, T. T.; Vujatovic, S.; Nikolić, N.; Aleksić, Obrad; Ivetić, Tamara; Cvetković, O.; Blagojević, V.; 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 ...
    • 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, V.; 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
    • Nanostructured Fe2O3/TiO2 thick films prepared by screen printing 

      Aleksić, Obrad; Đurić, Zorka; Nikolic, Maria Vesna; Tasić, Nikola; Vuković, Marina; Marinković Stanojević, Zorica; Nikolić, Nenad; Nikolić, Pantelija (Novi Sad : University of Novi Sad, Faculty of Technology, 2013)
      Nanostructured single layered (pure TiO2 , pure α-Fe2O3 and mixed Fe2O3 /TiO2 with two different oxide ratios, 2 : 3 and 3 : 2) and double layered (TiO2 layer over a Fe2O3 layer) thick films have been fabricated by screen ...
    • Nanostructured SnO2 thick films for gas sensor application: analysis of structural and electronic properties 

      Misković, Goran; Aleksić, Obrad; Nikolić, Maria Vesna; Nicolics, Johann; Radosavljević, Goran; Vasiljević, Zorka; Luković, Miloljub D.; Smetana, Walter (IOP Publishing, 2016)
      This research is focused on structural and electrical characterisation of tin oxide (SnO2) applied as a thick film and investigation of its properties as gas sensitive material. Micron sized SnO2 powder was milled in an ...
    • Optimization and Application of NTC Thick Film Segmented Thermistors 

      Nikolić, Maria Vesna; Aleksić, Obrad; Radojčić, B. M.; Luković, Miloljub D.; Nikolić, N.; Đurić, Zorka (Zurich : Trans Tech Publications Inc., 2013)
      NTC thermistor paste for printing thermal sensors on alumina was formed of very fine Ni0.5Cu0.2Zn1.0Mn1.3O4 thermistor powder obtained by a combined mechanical activation/thermal treatment process, organic vehicle and glass ...
    • Preparation and characterization of Cu and Zn modified nickel manganite NTC powders and thick film thermistors 

      Aleksić, Obrad; Nikolić, Maria Vesna; Luković, Miloljub D.; Nikolić, N.; Radojčić, B. M.; Radovanović, M.; Đurić, Zorka; Mitrić, Miodrag; Nikolić, Pantelija (Elsevier, 2013)
      A simple ball milling/thermal treatment procedure was applied to obtain fine thermistor powders. Three different powder compositions were analyzed–Cu0.2Ni0.5Zn1.0Mn1.3O4, Cu0.25Ni0.5Zn1.0Mn1.25O4 and Cu0.4Ni0.5Mn2.1O4. XRD ...
    • Pseudobrookite TiFe2O5 nanostructured thick films 

      Vasiljević, Zorka; Aleksić, Obrad; Luković, Miloljub D.; Nikolić, Maria Vesna; Tasić, Nikola B. (Belgrade : Institute of Technical Sciences of SASA, 2015)
      TiO2 (anatase) and Fe2O3 (hematite) nanopowders were mixed in the weight ratio 1:1.5 and 1:2 and homogenized in a planetary ball mill for an hour. After that pastes were prepared of the two powder mixtures, organic vehicle ...