Effect of A-site substitution on crystal component and dielectric properties in Bi0.5Na0.5TiO3 ceramics

被引：46
作者：
Qu, YF [1 ]
Shan, D [1 ]
Song, JJ [1 ]
机构：
[1] Tianjin Univ, Key Lab Adv Ceram & Machining Technol, Minist Educ, Tianjin 300072, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY | 2005年 / 121卷 / 1-2期
关键词：
bismuth sodium titanate; dielectric properties; doping effects; phase transitions;
D O I：
10.1016/j.mseb.2005.03.023
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A-site replacement is common used in optimizing the electric properties of Bi0.5Na0.5TiO3 (abbreviated to BNT). The effect of Ba2+ doping in BNT capacitor ceramics is investigated here. After the samples containing 6 at.% Ba2+, was sintered at 1180 degrees C for 2 h, capacitor ceramics with enhanced dielectric properties was fabricated, compared with pure BNT ceramics. It can be concluded from the experiment results that Ba2+ replaced the ions in A-site, and the lattice structure was altered, which led to the improvement of dielectric properties in BNT ceramics. Then we discussed the phase transformation process from room temperature to 400 degrees C according to the dielectric properties-temperature graphs. (c) 2005 Elsevier B.V. All rights reserved.
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收藏
页码：148 / 151
页数：4
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