The influence of mechanical activation on structural evolution of nanocrystalline SrTiOb>3b> powders

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• 作者：Jelena Živojinović^a ; ^{zivojinovic.jelena@gmail.com} ; Vera P. Pavlović^b ; Darko Kosanović^a ; Smilja Marković^a ; Jugoslav Krstić^c ; Vladimir A. Blagojević^a ; Vladimir B. Pavlović^a
• 关键词：Mechanical activation ; SrTiO3 ; Microstructure ; Ball milling ; Size dependence
• 刊名：Journal of Alloys and Compounds
• 出版年：2017
• 出版时间：25 February 2017
• 年：2017
• 卷：695
• 期：Complete
• 页码：863-870
• 全文大小：2481 K
• 卷排序：695

文摘

SrTiO3 nanocrystalline powders were prepared using mechanical activation. Powders mechanically activated for 30 min have narrowest size distribution. Shift in TO polar modes to higher frequencies due to introduction of micro-strains. Observed relaxation of the inversion symmetry in SrTiO3 due to activation. Band gap decreases due to TiO2 contamination, due to milling in air.