AC ageing characteristics of Y2O3-doped ZnO varistors with high voltage gradient

被引：37

作者：

He, Jinliang ^{[1
]}

Liu, Jun ^{[1
]}

Hu, Jun ^{[1
]}

Long, Wangcheng ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Elect Engn, State Key Lab Power Syst, Beijing 100084, Peoples R China

来源：

MATERIALS LETTERS | 2011年 / 65卷 / 17-18期

关键词：

ZnO; Varistors; Electrical properties; Defects; ZINC-OXIDE VARISTORS; ELECTRICAL CHARACTERISTICS; ENERGY-ABSORPTION; CERAMICS; DEGRADATION;

D O I：

10.1016/j.matlet.2011.06.022

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, AC ageing characteristics of high voltage gradient ZnO varistors doped with different Y2O3 concentration were investigated. The voltage gradient of these samples is markedly improved by increasing Y2O3 content, however, the nonlinear coefficient decreases and the leakage current increases at the same time. Y2O3-doped ZnO samples exhibit lower stability under accelerated AC ageing stress of 0.85 V-1mA/135 degrees C/168 h, compared with samples without Y2O3. Double-Schottky barrier(DSB) parameters before and after ageing tests indicate that the decrease of barrier height for traditional sample is less than that for high voltage gradient sample, which should be ascribed to its slight variation in the interface state density. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：2595 / 2597

页数：3

共 15 条

[11] The effect of sintering temperature on electrical properties and accelerated aging behavior of PCCL-doped ZnO varistors [J].

Nahm, Choon-Woo .

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 2007, 136 (2-3) :134-139

[12] Microstructure and electrical properties of Y2O3-doped ZnO-Pr6O11-based varistor ceramics [J].

Nahm, CW .

MATERIALS LETTERS, 2003, 57 (07) :1317-1321

[13] Effect of long-term electrical degradation on the distribution of donor impurities in ZnO varistor ceramics [J].

Tonkoshkur, AS ;

Lyashkov, AY ;

Gomilko, IV ;

Ivanchenko, AV .

INORGANIC MATERIALS, 2000, 36 (07) :745-748

[14]

Wang H, 1998, J AM CERAM SOC, V81, P2013, DOI 10.1111/j.1151-2916.1998.tb02582.x

[15] Electrical characteristics and stability of low voltage ZnO varistors doped with Al [J].

Wang, Mao-Hua ;

Hu, Ke-Ao ;

Zhao, Bin-Yuan ;

Zhang, Nan-Fa .

MATERIALS CHEMISTRY AND PHYSICS, 2006, 100 (01) :142-146

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