Low-temperature synthesis of superfine barium strontium titanate powder by the citrate method

被引：22
作者：
Zhang, Xiao-Fei [1 ]
Xu, Qing [1 ]
Huang, Yu-Heng [1 ]
Liu, Han-Xing [1 ]
Huang, Duan-Ping [1 ]
Zhang, Feng [1 ]
机构：
[1] Wuhan Univ Technol, Sch Mat Sci & Engn, Wuhan 430070, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2010年 / 36卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Calcination; Powders: chemical preparation; Sintering; Pervoskites; BST THICK-FILMS; DIELECTRIC-PROPERTIES; PRECIPITATION;
D O I：
10.1016/j.ceramint.2010.02.004
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Ba0.6Sr0.4TiO3 powder was synthesized by a citrate method. The phase development was examined with respect to calcining temperature and heating rate during the calcining process. The results reveal a crucial role of the heating rate to the formation of a pure perovskite phase at low calcining temperatures. It was found that keeping relatively low heating rates <= 0.7 degrees C/min during the calcining process after 300 degrees C was favorable to a sufficient decomposition of (Ba,Sr)(2)Ti2O5 center dot CO3 intermediate phase at low temperatures and consequently led to the formation of a pure perovskite phase at 550 degrees C. Ba0.6Sr0.4TiO3 powder calcined at the temperature under the heating rate of 0.7 degrees C/min showed a superfine and uniform particle morphology and high sintering reactivity. As a result, the ceramic specimens prepared from the powder attained reasonable relative densities (94-95%) at sintering temperatures of 1250-1270 degrees C. (C) 2010 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码：1405 / 1409
页数：5
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