Sol-gel synthesis and characterization of Ba(1-x)SrxTiO3 ceramics

被引：31
作者：
Li, Wei [1 ]
Xu, Zhijun [1 ]
Chu, Ruiqing [1 ]
Fu, Peng [1 ]
Hao, Jigong [1 ]
机构：
[1] Liaocheng Univ, Coll Mat Sci & Engn, Liaocheng 252059, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 499卷 / 02期
基金：
国家高技术研究发展计划(863计划); 中国国家自然科学基金;
关键词：
Barium strontium titanate; Sol-gel process; Microstructure; Dielectric properties; DIELECTRIC-PROPERTIES; TITANATE CERAMICS; BATIO3; SUBSTITUTION; BEHAVIOR; LA;
D O I：
10.1016/j.jallcom.2010.03.180
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：
Ba(1-x)SrxTiO3 (x=0, 0.1, 0.2, 0.3) nanopowders were synthesized from alkoxide solution precursor by sol-gel process. The Ba(1-x)SrxTiO3 powders calcined at 800 degrees C for 2 h were maintained in cubic phase and the cell parameters were in the range of 4.0282-3.9786. The effects of Sr doping and sintering temperature on structure and dielectric characteristics of the Ba(1-x)SrxTiO3 ceramics were investigated. The increase of Sr content in the Ba(1-x)SrxTiO3 ceramics causes the inhibition of grain growth and downward shift of Curie temperature (T-c). The T-c shift rate is 2.5 degrees C/mol% with increasing Sr content. At T-c, the dielectric constants of Ba(1-x)SrxTiO3 ceramics increase with the increasing of sintering temperature, and the highest permittivity (7032) is obtained for x=0.1 sample sintered at 1400 degrees C. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：255 / 258
页数：4
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