High-temperature dielectric relaxation mechanism in Ba4SmFe0.5Nb9.5O30 tungsten bronze ceramics

被引：4
作者：
Hu, Changzheng [1 ]
Guo, Zhe [1 ]
Wu, Shan [1 ]
Sun, Zhen [1 ]
Li, Chunchun [1 ]
Liu, Laijun [1 ]
Fang, Liang [1 ]
机构：
[1] Guilin Univ Technol, Guangxi Univ Key Lab Nonferrous Met Oxide Elect F, Key Lab New Proc Technol Nonferrous Met & Mat, Minist Educ,Coll Mat Sci & Engn, Guilin 541004, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2018年 / 44卷
基金：
中国国家自然科学基金;
关键词：
Tungsten bronze ceramics; Dielectric properties; Relaxation; ELECTRICAL-CONDUCTION; BATIO3; CERAMICS; SPECTRA; XPS;
D O I：
10.1016/j.ceramint.2018.08.109
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The high temperature dielectrics properties of unfilled tungsten bronze ceramics, Ba4SmFe0.5Nb9.5O30, were studied. The temperature dielectric properties and the variable temperature XRD data, in addition to the XPS data indicated that BSFN ceramics have no phase changes from 25 degrees C to 450 degrees C; the high temperature relaxation behaviour around 350 degrees C is closely related to the oxygen defects. Frequency dependence of temperature electrical conductivity relaxation of Ba4SmFe0.5Nb9.5O30 ceramics was well fitted by the Arrhenius relationship with E-a similar to 0.65 eV.
引用
收藏
页码：S224 / S227
页数：4
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