Nonlinear current-voltage characteristics of sintered tungsten-vanadium oxide

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	Nonlinear current-voltage characteristics of sintered tungsten-vanadium oxide
	Z. L. Liu; L. F. Yang; Y. Wang; K. L. Yao; C. C. Wang
	2004
发表期刊	Chinese Physics
ISSN	1009-1963
卷号	13 期号:4 页码:522-528
摘要	We have studied the densification behaviour, microstructure and electrical properties of WO3 ceramics with V2O5 as the additive ranging from 0.5 to 15mol%. Scanning electron microscopic photos indicated that the grain size of WO3-V2O5 specimens is smaller than that of pure WO3. The addition of V2O5 to WO3 showed a tendency to enhance the densification rate and to restrict the grain growth. Electrical properties of all specimens were measured for different electrodes at different temperatures. The formation of the grain boundary barrier layer was confirmed by the non-ohmic I-V behaviour. The nonlinear coefficient was obtained at the current density J=0.01, 0.1 and 1mA/cm(2) for a series of WO3-V2O5 samples. The V0.5mol% specimen showed an abnormal phenomenon that the nonlinear characteristics appeared at 350degreesC and disappeared at lower and higher temperatures. This implies that it could be applied as a high-temperature varistor. The double Schottky barrier model was adopted to explain the phenomena for the WO3-V(2)o(5) varistors.
部门归属	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. chinese acad sci, int ctr mat phys, shenyang 110012, peoples r china.;yao, kl (reprint author), huazhong univ sci & technol, dept phys, wuhan 430074, peoples r china;klyao@hust.edu.cn
关键词	V2o5-wo3 Ceramics Current-voltage Characteristics Microstructure Varistors Tio2 Trioxide
URL	查看原文
WOS记录号	WOS:000220682200019
引用统计	被引频次：1[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/321006/35479
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. L. Liu,L. F. Yang,Y. Wang,et al. Nonlinear current-voltage characteristics of sintered tungsten-vanadium oxide[J]. Chinese Physics,2004,13(4):522-528.
APA	Z. L. Liu,L. F. Yang,Y. Wang,K. L. Yao,&C. C. Wang.(2004).Nonlinear current-voltage characteristics of sintered tungsten-vanadium oxide.Chinese Physics,13(4),522-528.
MLA	Z. L. Liu,et al."Nonlinear current-voltage characteristics of sintered tungsten-vanadium oxide".Chinese Physics 13.4(2004):522-528.