Obtaining the highly pure barium titanate nanocrystals by a new approach

被引:25
作者
Ashiri, Rouholah [1 ]
Moghadam, Ali Heidary [1 ]
Ajami, Reza [1 ]
机构
[1] Islamic Azad Univ, Dezful Branch, Dept Mat Sci & Engn, Dezful, Iran
关键词
Nanocrystals; Innovative synthesis; Barium titanate; Powder technology; THIN-FILMS; BATIO3; MICROWAVE; EVOLUTION; CRYSTALS; POWDER; BACO3;
D O I
10.1016/j.jallcom.2015.06.234
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Purity and synthesis temperature of nanocrystals are key challenges facing the scientific community. Herein a novel solid-state approach to synthesize fine BaTiO3 nanocrystals with narrow size distribution using a high-speed ball-milling process is reported. In order to improve the kinetics of this reaction, the starting materials, BaCO3 and TiO2, were milled for 10 h before mixing and initiating the synthesis reaction. The contribution of this step to the BaTiO3 formation is analyzed by XRD diffractometry and FE-SEM techniques. It was found that the use of the mechanically activated starting materials favors the decomposition of BaCO3 at low temperatures and improves the Ba2+ diffusion through the formed BaTiO3 layer. In consequence, very fine BaTiO3 nanocrystals free from the secondary phases were obtained at a lower temperature in contrast to the previous works. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码:265 / 268
页数:4
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