Phase transformation of ZrO^sub 2^ nanoparticles produced from zircon

This article focuses on the phase transformation of zirconia (ZrO^sub 2^) nanoparticles produced from zircon using a bottom-up approach. The influence of mechanical milling and thermal annealing on crystalline phase transformation of ZrO^sub 2^ nanoparticles was explored. It was found that the iron...

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Bibliographic Details
Published inPhase transitions Vol. 85; no. 1-2; p. 13
Main Authors Rauta, PR, Manivasakan, P, Rajendran, V, Sahu, BB, Panda, BY, Mohapatra, P
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis Ltd 01.01.2012
Subjects
Annealing
Crystal structure
Nanoparticles
Phase transitions
Zirconium
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Summary:This article focuses on the phase transformation of zirconia (ZrO^sub 2^) nanoparticles produced from zircon using a bottom-up approach. The influence of mechanical milling and thermal annealing on crystalline phase transformation of ZrO^sub 2^ nanoparticles was explored. It was found that the iron oxide, as an inherent impurity present in ZrO^sub 2^ nanoparticles, produced from zircon stabilises the cubic phase after calcination at 600°C. The stabilised cubic phase of ZrO^sub 2^ nanoparticles was disappeared and transformed into partial tetragonal and monoclinic phases after mechanical milling. The phase transformation occurred on account of the crystal defect induced by high-energy mechanical milling. The destabilisation of cubic phase into monoclinic phase was observed after the thermal annealing of ZrO^sub 2^ nanoparticles at 1000°C. The phase transitions observed are correlated to the exclusion of iron oxide from the zirconia crystal structure. [PUBLICATION ABSTRACT]
ISSN:0141-1594
1029-0338