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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
2019-10-01
Source PublicationMATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
ISSN0921-5107
Volume249
SubtypeArticle
Abstract(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.
KeywordNTC ceramics Structure Electrical properties
DOI10.1016/j.mseb.2019.114421
Language英语
WOS Research AreaMaterials Science ; Physics
PublisherELSEVIER
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Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/26785
Collection中国科学院上海硅酸盐研究所
Recommended Citation
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).
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