Structural Changes of ZnO - Cr2O3 System during Mechanical Activation and Their Influence on the Spinel Synthesis
ZORICA V. MARINKOVIC1, TATJANA V. SRECKOVIC1, IREANA PETROVIC-PRELEVIC2 and MOMCILO M. RISTIC3
1Center for Multidisciplinary Studies, University of Belgrade,
Kneza Viseslava 1a, Belgrade 11000
2Faculty of Mining and Geology, University of Belgrade,
Kneza Viseslava 1a, Belgrade 11000
3Serbian Academy of Sciences and Arts,
Kneza Viseslava 1a, Belgrade 11000
E-mail: mzorica@mi.sanu.ac.yu,Yugoslavia
Страницы: 155-160
Аннотация
An equimolar ZnO and Cr2O3 powder mixture was mechanically activated by grinding using a high-energy vibrational mill for 0-180 min. Structural changes of the material that occur during mechanical treatment were analyzed using the surface characterization method (specific surface area, and based on the latter the calculated mean particle size) and X-ray diffraction line broadening theory. The characteristic temperatures within in the temperature range of 20-1100 °C that is the consequence of a solid state reaction were determined using differential thermal analysis. Evolution of the phase composition of the solid state reaction between zinc oxide and chromium oxide was followed using X-ray analysis of samples isothermally sintered at 900 °C for 15, 60, 120 and 240 min.
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