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The effect of A-site nonstoichiometry on the microstructure, electric properties, and phase stability of NaNbO3 polycrystalline ceramics
Fan, Yuzhu; Zhou, Zhiyong; Liang, Ruihong; Zhou, Mingxing; Dong, Xianlin
2019-12-01
Source PublicationJOURNAL OF THE EUROPEAN CERAMIC SOCIETY
ISSN0955-2219
Volume39Issue:15Pages:4712
SubtypeArticle
AbstractThe impact of A-site nonstoichiometry on the microstructure, electric properties, and phase stability of sodium niobate ceramics (Na1+xNbO3, x = -2 to 1 mol %) was investigated. All the components maintained an orthorhombic antiferroelectric (AFE) structure. The grain size increased from 3.9 to 14.3 mu m with the variation in x from -2 to 1. The AFE-FE phase transition electric field dramatically increased from 100 kV cm(-1) at x = 0 to 170 kV cm(-1) at x = -2, confirming the enlarged energy barrier between AFE Pbma and FE P.mc2(1) phase under external field in A-site deficient components. This is attributed to the lattice compressive stress generated by introducing proper A-site vacancies. Combined results of transmission electron microscopy and Raman spectroscopy indicated that the AFE distortion of Pbma phase was significantly enhanced in A-site deficient components, which jointly contributed to the stability of AFE phase in A-site deficient NaNbO3 material.
KeywordNaNbO3 ceramics Antiferroelectric material A-site nonstoichiometry Phase stability
DOI10.1016/j.jeurceramsoc.2019.06.041
Language英语
WOS Research AreaMaterials Science
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/26706
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Fan, Yuzhu,Zhou, Zhiyong,Liang, Ruihong,et al. The effect of A-site nonstoichiometry on the microstructure, electric properties, and phase stability of NaNbO3 polycrystalline ceramics[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,2019,39(15):4712.
APA Fan, Yuzhu,Zhou, Zhiyong,Liang, Ruihong,Zhou, Mingxing,&Dong, Xianlin.(2019).The effect of A-site nonstoichiometry on the microstructure, electric properties, and phase stability of NaNbO3 polycrystalline ceramics.JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,39(15),4712.
MLA Fan, Yuzhu,et al."The effect of A-site nonstoichiometry on the microstructure, electric properties, and phase stability of NaNbO3 polycrystalline ceramics".JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 39.15(2019):4712.
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