Investigation on Electrical Properties and Microdefects of Nb5+-Doped BaTiO3 Based Ceramics by Positron Annihilation Techniques

被引：0
|
作者：
Cheng, Xuxin [1 ]
Wang, Yuxin [2 ]
Chen, Xiaoming [1 ]
Cui, Haining [1 ]
机构：
[1] Zhaoqing Univ, Sch Elect & Elect Engn, Zhaoqing Rd, Zhaoqing 526061, Guangdong, Peoples R China
[2] Jiangsu Univ Sci & Technol, Sch Mat Sci & Engn, Zhenjiang 212003, Jiangsu, Peoples R China
来源：
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS | 2019年 / 22卷
基金：
中国国家自然科学基金;
关键词：
BaTiO3; PTC effect; Positron annihilation; Defect; Electroceramics; BARIUM-TITANATE; NB; DEFECTS; DIFFUSION;
D O I：
10.1590/1980-5373-MR-2018-0921
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The influence of the Nb5+-doped content and the doping CaCO3 on the electrical properties and the microdefects of BSTN ceramics by Positron Annihilation Techniques were studied, which were fired at 1350 degrees C for 2 hours in air. The PTCR characteristics in the BSTN samples were also investigated. Moreover, the information on microdefects in BSTN ceramics was demonstrated by coincidence Doppler broadening spectrum measurements and positron annihilation lifetime spectra. Meanwhile, the influence of the defects on the electrical properties of the ceramics was also revealed. Furthermore, the critical donor-dopant content was 0.4 mol%, which corresponding room-temperature resistivity and the resistivity jumping ratio was 714.3 Omega.cm and 2.77 x 10(2), respectively. In addition, the average positrons annihilate lifetime tau of the BSTN ceramics was investigated as well.
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页数：6
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