Effect of a Bi-Cr-O synthetic multi-phase on the microstructure and electrical properties of ZnO-Bi2O3 varistor ceramics

CORC > 上海硅酸盐研究所 > 中国科学院上海硅酸盐研究所 > 无机功能材料与器件重点实验室 > 期刊论文

	Effect of a Bi-Cr-O synthetic multi-phase on the microstructure and electrical properties of ZnO-Bi2O3 varistor ceramics
	Xu, Zhijun 1; Bai, Hairui 1; Ma, Shuai 1; Chu, Ruiqing 1; Hao, Jigong 1; Chen, Chong 1; Li, Guorong 2
刊名	CERAMICS INTERNATIONAL
	2016-10-01
卷号	42 期号:13 页码:14350-14354
关键词	Zno-Bi2O3-based varistors High nonlinear coefficient Low leakage current Synthetic multi-phase
英文摘要	ZnO-Bi2O3-MnO2 (ZBM)-based varistors were fabricated via doping a novel synthetic multi-phase (SMP) additive produced by calcining the mixture of 18Bi(2)O(3)center dot Cr2O3 at a given temperature. The effects of the SMP on the microstructural and electrical properties of ZBM varistors were investigated. It was found that the SMP dopant was a compound crystalline phases including Bi-Cr-O phases (Bi7.38Cr0.62O12+x and CrBi180O30) and small amounts of Bi2O3 rather than a synthesized polycrystal. The Bi-Cr-O phases were not emerged for samples with x=1, indicating that the amount of it is tiny and the small Bi2O3 may accelerate ZnO grain growth. With more SMP doping (x>1) in the ZBM ceramics, it acted as a barrier inhibiting grain growth. For samples with x=5, excellent electrical properties were obtained: the non-linear coefficient alpha increased up to 50.19 corresponding to the highly barrier height of 2.62 eV; the leakage current I-L reduced to 0.3 mu A. The dielectric constant epsilon(a) is proportional to the ratio of the grain size d to the thickness of the depletion layer width t, which explained the epsilon(a) increased at f=1 kHz for the samples with x=1 and 5. The improvement of the electrical properties can be explained by the oxygen absorption mechanism. (C) 2016 Published by Elsevier Ltd.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Materials Science, Ceramics
研究领域[WOS]	Materials Science
关键词[WOS]	ZINC-OXIDE CERAMICS ; ZNO VARISTORS ; GRAIN-GROWTH ; BI2O3 ; CR2O3 ; RESISTIVITY ; DEPENDENCE ; BOUNDARY ; MN
收录类别	SCI
语种	英语
WOS记录号	WOS:000381171600006
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/22869]
专题	上海硅酸盐研究所_无机功能材料与器件重点实验室_期刊论文
作者单位	1.Liaocheng Univ, Coll Mat Sci & Engn, Liaocheng 252059, Peoples R China 2.Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfinem, Shanghai 200050, Peoples R China
推荐引用方式 GB/T 7714	Xu, Zhijun,Bai, Hairui,Ma, Shuai,et al. Effect of a Bi-Cr-O synthetic multi-phase on the microstructure and electrical properties of ZnO-Bi2O3 varistor ceramics[J]. CERAMICS INTERNATIONAL,2016,42(13):14350-14354.
APA	Xu, Zhijun.,Bai, Hairui.,Ma, Shuai.,Chu, Ruiqing.,Hao, Jigong.,...&Li, Guorong.(2016).Effect of a Bi-Cr-O synthetic multi-phase on the microstructure and electrical properties of ZnO-Bi2O3 varistor ceramics.CERAMICS INTERNATIONAL,42(13),14350-14354.
MLA	Xu, Zhijun,et al."Effect of a Bi-Cr-O synthetic multi-phase on the microstructure and electrical properties of ZnO-Bi2O3 varistor ceramics".CERAMICS INTERNATIONAL 42.13(2016):14350-14354.