Varistor effect of WO3-based ceramics at high temperatures

doi:10.1016/j.metlet.2003.08.039

IMR OpenIR

	Varistor effect of WO3-based ceramics at high temperatures
	Wang, Y ; Yang, XS ; Liu, ZL ; Yao, KL
通讯作者	Wang, Y(mpywang@mail.hust.edu.cn)
	2004-02-01
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.
关键词	varistor effect ceramics current-voltage properties
DOI	10.1016/j.metlet.2003.08.039
收录类别	SCI
语种	英语
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Physics, Applied
WOS记录号	WOS:000188288600036
出版者	ELSEVIER SCIENCE BV
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/81487
通讯作者	Wang, Y
作者单位	1.Huazhong Univ Sci & Technol, Dept Phys, Wuhan 430074, Peoples R China 2.Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110015, Peoples R China 3.Huazhong Univ Sci & Technol, Dept Phys, Wuhan 430074, Peoples R China 4.Huazhong Univ Sci & Technol, State Key Lab Laser Technol, Wuhan 430074, Peoples R China
推荐引用方式 GB/T 7714	Wang, Y,Yang, XS,Liu, ZL,et al. Varistor effect of WO3-based ceramics at high temperatures[J]. MATERIALS LETTERS,2004,58(6):1017-1019.
APA	Wang, Y,Yang, XS,Liu, ZL,&Yao, KL.(2004).Varistor effect of WO3-based ceramics at high temperatures.MATERIALS LETTERS,58(6),1017-1019.
MLA	Wang, Y,et al."Varistor effect of WO3-based ceramics at high temperatures".MATERIALS LETTERS 58.6(2004):1017-1019.