Dielectric properties of Mg-doped Ba0.6Sr0.4TiO3 ceramic sintered at a low temperature with Li2O additve

被引：7
|
作者：
Chou, Xiujian [1 ]
Zhai, Jiwei [1 ]
Sun, Jianying [1 ]
Yao, Xi [1 ]
机构：
[1] Tongji Univ, Funct Mat Res Lab, Shanghai 200092, Peoples R China
来源：
FERROELECTRICS | 2007年 / 356卷
关键词：
barium strontium titanium; doping; low-temperature sintering; dielectric properties; tunability; MICROSTRUCTURE;
D O I：
10.1080/00150190701508845
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Dielectric properties of Mg-doped Ba0.6Sr0.4TiO3 ceramics with the aid of Li2O have been investigated. 3.0wt% Li2O additive samples can be sintered at 900 degrees C for 4h and sintering temperature remarkably decrease. Phase and microstructure of these samples were analyzed using XRD and SEM. Results show no obvious secondary phase and decreased grain-size as MgO content increased. Dielectric constant is decreased and the Curie temperature is shifted to low temperature and the peaks are suppressed and broaden with the increase of MgO. Tunability is decreased from about 30% to 15% with MgO content increasing from 0.15wt% to 5.0wt% under applied electric field of 40 kV/cm.
引用
收藏
页码：305 / 310
页数：6
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