Effects of Sintering Temperature on Microstructure, Electric Properties of Ba0.7Sr0.3TiO3 Ceramics

被引：1
作者：
He, Haifeng [1 ]
Cai, Wei [1 ,2 ]
Gao, Rongli [1 ,2 ]
Chen, Gang [1 ,2 ]
Deng, Xiaoling [1 ,2 ]
Fu, Chunlin [1 ,2 ]
机构：
[1] Chongqing Univ Scince & Technol, Sch Met & Mat Engn, Chongqing 401331, Peoples R China
[2] Chongqing Key Lab Nanomicro Composite Mat & Devic, Chongqing 401331, Peoples R China
来源：
ADVANCED FUNCTIONAL MATERIALS (CMC 2017) | 2018年
关键词：
Ba(0.7)sr(0.3)tio(3); Microstructure; Electrical properties; Relaxor; FERROELECTRIC PROPERTIES; BARIUM; BEHAVIOR;
D O I：
10.1007/978-981-13-0110-0_65
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Barium strontium titanate is an important electronic functional ceramics, which has a strong dielectric nonlinearity and excellent ferroelectricity. In the present study Ba0.7Sr0.3TiO3 ceramics were synthesized by conventional solid state reaction method. The effects of sintering temperature on the microstructure, dielectric and ferroelectric properties of Ba0.7Sr0.3TiO3 ceramics have been investigated. The XRD results show that Ba0.7Sr0.3TiO3 ceramics sintered at 1350-1450 degrees C were single tetragonal phase. The lattice constant and tetragonality decreased as sintering temperature increasing. The grain size increased with the rise of sintering temperature. The dielectric properties of Ba0.7Sr0.3TiO3 ceramics sintered at 1350 degrees C were superior to that of the ceramic samples sintered at 1400 and 1450 degrees C. The decrease of tetragonality with the rise of sintering temperature leaded to the fall of the Curie temperature of Ba0.7Sr0.3TiO3 ceramics. Ba0.7Sr0.3TiO3 ceramics sintered at 1350-1450 degrees C were relaxor ferroelectrics. The diffuseness weakened as sintering temperature increase. The remnant polarization and coercive field gradually increased with the rise of sintering temperature.
引用
收藏
页码：587 / 598
页数：12
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