Structure and electrical properties of Bi0.5Ba0.5FeO3-Y2O3 composite NTC ceramics

doi:10.1016/j.mseb.2019.114421

	Structure and electrical properties of Bi0.5Ba0.5FeO3-Y2O3 composite NTC ceramics
	Fu, Peng; Miao, Guangtan; Yin, Ming; Li, Wei; Hao, Jigong; Li, Guorong; Wang, Chuming
刊名	MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
	2019-10-01
卷号	249
关键词	NTC ceramics Structure Electrical properties
ISSN号	0921-5107
DOI	10.1016/j.mseb.2019.114421
文献子类	Article
英文摘要	(1 - x) Bi0.5Ba0.5FeO3 (BBF)-xY(2)O(3) negative temperature coefficient (NTC) ceramics were prepared by solid-state reaction method. With increasing Y2O3 contents, the grain sizes of the samples increase. All (1 - x) BBF-xY(2)O(3) ceramics have the typical NTC effect. The conductive mechanism of BBF based ceramics is largely the electron hopping. The thermistor constants B-25/75 of the (1 - x) BBF-xY(2)O(3) ceramics keep the lager values in the range of 6441 to 7611 K. The resistivity at 25 degrees C decreases from 7.82 x 10(7) Omega cm for the pure BBF ceramic to 10(6) Omega cm magnitudes for the 0.80 BBF-0.20Y(2)O(3) ceramic. The activation energy E-a of samples is in the range of 0.5003-0.5529 eV. The impedance analysis indicates that the grain boundary resistances are higher than intragrain resistances in BBF based ceramics. All samples have the single relaxation process, and the relaxation phenomena are attributed to hopping of oxygen vacancies.
WOS研究方向	Materials Science ; Physics
语种	英语
出版者	ELSEVIER
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/26785]
专题	中国科学院上海硅酸盐研究所
推荐引用方式 GB/T 7714	Fu, Peng,Miao, Guangtan,Yin, Ming,et al. Structure and electrical properties of Bi0.5Ba0.5FeO3-Y2O3 composite NTC ceramics[J]. MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS,2019,249.
APA	Fu, Peng.,Miao, Guangtan.,Yin, Ming.,Li, Wei.,Hao, Jigong.,...&Wang, Chuming.(2019).Structure and electrical properties of Bi0.5Ba0.5FeO3-Y2O3 composite NTC ceramics.MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS,249.
MLA	Fu, Peng,et al."Structure and electrical properties of Bi0.5Ba0.5FeO3-Y2O3 composite NTC ceramics".MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS 249(2019).