Correlation Between Grain Sizes and Electrical Properties of CaBi2Nb2O9 Piezoelectric Ceramics

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	Correlation Between Grain Sizes and Electrical Properties of CaBi2Nb2O9 Piezoelectric Ceramics
	Chen Huanbei; Shen Bo; Xu Jinbao; Kong Lingbing; Zhai Jiwei
刊名	JOURNAL OF THE AMERICAN CERAMIC SOCIETY
	2012
卷号	95 期号:11 页码:3514-3518
ISSN号	0002-7820
英文摘要	Calcium bismuth niobate (CaBi2Nb2O9, CBN) is a high Curie temperature (T-C=930 degrees C) ferroelectrics material and a promising candidate for high-temperature piezoelectric applications. This study focuses on the effect of the grain size on the electric properties and thermal stability of CBN ceramics. The CBN ceramics with different grain sizes were prepared by three different sintering methods: normal sintering, two-step sintering, and hot pressing sintering. Result shows that a strong dependence of piezoelectric properties on the grain size. The d(33) of two-step sintering samples with 1.4 mu m grain size is 13.5 pC/N which is more than double of that the normal sintering sample with only about 6 pC/N. With the grain size increasing, the unit-cell volume of CBN ceramic is expanded and the T-C shift to higher temperature for enhanced stability of the orthorhombic structure. The thermal stability of piezoelectric properties is enhanced from room temperature to near Curie temperature when the grain size is larger than that of 4.3 mu m. However, the thermal stability is decreased with decreasing of the grain size since internal stresses provide an additional driving force that assists the thermal depolarization.
学科主题	Materials Science
收录类别	SCI
WOS记录号	WOS:000310600900028
公开日期	2013-11-07
内容类型	期刊论文
源URL	[http://ir.xjipc.cas.cn/handle/365002/2753]
专题	新疆理化技术研究所_材料物理与化学研究室
作者单位	Tongji Univ, Funct Mat Res Lab, Shanghai 200092, Peoples R China;Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Urumqi 830011, Peoples R China;Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore
推荐引用方式 GB/T 7714	Chen Huanbei,Shen Bo,Xu Jinbao,et al. Correlation Between Grain Sizes and Electrical Properties of CaBi2Nb2O9 Piezoelectric Ceramics[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY,2012,95(11):3514-3518.
APA	Chen Huanbei,Shen Bo,Xu Jinbao,Kong Lingbing,&Zhai Jiwei.(2012).Correlation Between Grain Sizes and Electrical Properties of CaBi2Nb2O9 Piezoelectric Ceramics.JOURNAL OF THE AMERICAN CERAMIC SOCIETY,95(11),3514-3518.
MLA	Chen Huanbei,et al."Correlation Between Grain Sizes and Electrical Properties of CaBi2Nb2O9 Piezoelectric Ceramics".JOURNAL OF THE AMERICAN CERAMIC SOCIETY 95.11(2012):3514-3518.