Varistor effect of WO3-based ceramics at high temperatures

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	Varistor effect of WO3-based ceramics at high temperatures
	Y. Wang; X. S. Yang; Z. L. Liu; K. L. Yao
	2004
发表期刊	Materials Letters
ISSN	0167-577X
卷号	58 期号:6 页码:1017-1019
摘要	Tb4O7-doped WO3 ceramics were fabricated with conventional ceramic technique and current-voltage properties were measured from room temperature to 500degreesC. The sample, with atom ratio of W to Tb equal to 95/5, exhibits nonlinear I-V property characterized with symmetry and smooth below 100degreesC. With temperature increasing, nonlinearity of the samples decreases, but, beyond 300degreesC, the varistor effect of the sample reappears to some extent and the nonlinear coefficient alpha is around 4 at 500degreesC in the current density range of 10(-3) to 10(-2) A/cm(2). The coexistence of two phases in Tb-WO3 ceramics was observed by means of XRD at high temperature, and net polarization from two different phases at grain boundaries was related to electrical nonlinearity. (C) 2003 Elsevier B.V. All rights reserved.
部门归属	huazhong univ sci & technol, dept phys, wuhan 430074, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110015, peoples r china. huazhong univ sci & technol, dept phys, wuhan 430074, peoples r china. huazhong univ sci & technol, state key lab laser technol, wuhan 430074, peoples r china.;wang, y (reprint author), huazhong univ sci & technol, dept phys, wuhan 430074, peoples r china;mpywang@mail.hust.edu.cn
关键词	Varistor Effect Ceramics Current-voltage Properties Oxide
URL	查看原文
WOS记录号	WOS:000188288600036
引用统计	被引频次：25[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/35596
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. Wang,X. S. Yang,Z. L. Liu,et al. Varistor effect of WO3-based ceramics at high temperatures[J]. Materials Letters,2004,58(6):1017-1019.
APA	Y. Wang,X. S. Yang,Z. L. Liu,&K. L. Yao.(2004).Varistor effect of WO3-based ceramics at high temperatures.Materials Letters,58(6),1017-1019.
MLA	Y. Wang,et al."Varistor effect of WO3-based ceramics at high temperatures".Materials Letters 58.6(2004):1017-1019.