Microstructure and Electrical Properties of La2O3-doped ZnO-Bi2O3 based Varistor Ceramics

被引：27

作者：

Xu, Dong ^{[1
]}

Cheng, Xiaonong ^{[1
]}

Wang, Mingsong ^{[1
]}

Shi, Liyi ^{[2
]}

机构：

[1] Jiangsu Univ, Sch Mat Sci & Engn, Zhenjiang 212013, Peoples R China

[2] Shanghai Univ, Res Ctr Nano Sci & Technol, Shanghai 200041, Peoples R China

来源：

MULTI-FUNCTIONAL MATERIALS AND STRUCTURES II, PTS 1 AND 2 | 2009年 / 79-82卷

关键词：

varistors; zinc oxide; rare earth; electrical properties; microstructure; ZNO VARISTORS; VOLTAGE;

D O I：

10.4028/www.scientific.net/AMR.79-82.2007

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

La2O3-doped ZnO-Bi2O3-based varistor ceramics were obtained by a solid reaction route, and the microstructure and electrical properties of the varistor ceramics were studied in this paper. The results showed with addition of 0-1.00mol% La2O3, La2O3-doped ZnO-based varistor ceramics were prepared in this paper with the voltage gradient of 77-503V/mm, the nonlinear coefficient of 2.4-36.8, and the leakage current of 0.09-494 mu A. The results also showed with addition of 0.08mol% La2O3, La2O3-doped ZnO-based varistor ceramics exhibit comparatively ideal comprehensive electrical properties. Such as the threshold voltage was 320V/mm, the nonlinear coefficient was 36.8 and the leakage current was 0.29 mu A. The doping of La2O3 affects the form and decomposition of the pyrochlore.

引用

页码：2007 / +

页数：2

共 8 条

[1] Microstructural and compositional aspects of ZnO-based varistor ceramics prepared by direct mixing of the constituent phases and high-energy milling [J].

Bernik, S. ;

Brankovic, G. ;

Rustja, S. ;

Zunic, M. ;

Podlogar, M. ;

Brankovic, Z. .

CERAMICS INTERNATIONAL, 2008, 34 (06) :1495-1502

[2]

Clarke DR, 1999, J AM CERAM SOC, V82, P485

[3] ZnO varistors with high voltage gradient and low leakage current by doping rare-earth oxide [J].

He JinLiang ;

Hu Jun ;

Lin YuanHua .

SCIENCE IN CHINA SERIES E-TECHNOLOGICAL SCIENCES, 2008, 51 (06) :693-701

[4] Rare earth oxides effects on both the threshold voltage and energy absorption capability of ZnO varistors [J].

Houabes, Mourad ;

Metz, Renaud .

CERAMICS INTERNATIONAL, 2007, 33 (07) :1191-1197

[5] Influence of La2O3 additives on microstructure and electrical properties of ZnO-Pr6O11-CoO-Cr2O3-La2O3-based varistors [J].

Nahm, CW .

MATERIALS LETTERS, 2005, 59 (16) :2097-2100

[6] Effect of variations in grain size and grain boundary barrier heights on the current-voltage characteristics of ZnO varistors [J].

Nan, CW ;

Clarke, DR .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1996, 79 (12) :3185-3192

[7] Bi2O3 vaporization from ZnO-based varistors [J].

Peiteado, M ;

de la Rubia, MA ;

Velasco, MJ ;

Valle, FJ ;

Caballero, AC .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2005, 25 (09) :1675-1680

[8] Microstructure and electrical properties of ZnO-Bi2O3-based varistor ceramics by different sintering processes [J].

Xu, Dong ;

Shi, Liyi ;

Wu, Zhenhong ;

Zhong, Qingdong ;

Wu, Xinxin .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2009, 29 (09) :1789-1794

← 1 →