Effect of Sc2O3 on the electrical properties of (Co, Ta, Cr)-doped SnO2 varistors

被引：0

作者：

Zang, GZ ^{[1
]}

Wang, JF ^{[1
]}

Chen, HC ^{[1
]}

Su, WB ^{[1
]}

Wang, CM ^{[1
]}

Qi, P ^{[1
]}

机构：

[1] Shandong Univ, Sch Phys & Microelect, State Key Lab Crystal Mat, Jinan 250100, Peoples R China

来源：

PHYSICA B-CONDENSED MATTER | 2005年 / 367卷 / 1-4期

关键词：

varistor; nonlinear coefficient; Sc2O3; SnO2;

D O I：

10.1016/j.physb.2005.05.045

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The effects Of Sc2O3 doping on the electrical properties of (Co, Ta, Cr)-doped SnO2 varistors were investigated and the maximal nonlinear coefficient (alpha = 34) of the sample doped with 0.03 mol% Sc2O3 was obtained. It was found that the breakdown electrical field of samples increased significantly with increasing Sc2O3 concentration and the sample doped with 0.08 mol% Sc2O3 has the highest breakdown electrical field of 3336 V/mm. The measurement of grain size and sample impedances reveal that the increase of grain boundary resistance is the substantial reason for the increase of breakdown electrical field. The increase of grain boundary resistance may be caused by the increase of depletion layer thickness and it can be illustrated by the decrease of relative dielectric constant with increasing Sc2O3 concentration. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：29 / 34

页数：6

共 20 条

[11] VOLTAGE NONLINEARITY OF ZINC OXIDE CERAMICS DOPED WITH ALKALI EARTH METAL OXIDE [J].

MATSUOKA, M ;

MASUYAMA, T ;

IIDA, Y .

JAPANESE JOURNAL OF APPLIED PHYSICS, 1969, 8 (10) :1275-&

[12] HIGH-TEMPERATURE BEHAVIOR OF ZNO-BASED CERAMIC VARISTORS [J].

PHILIPP, HR ;

LEVINSON, LM .

JOURNAL OF APPLIED PHYSICS, 1979, 50 (01) :383-389

[13]

PIANARO SA, 1995, J MATER SCI LETT, V14, P692, DOI 10.1007/BF00253373

[14] Microstructure and electric properties of a SnO2 based varistor [J].

Pianaro, SA ;

Bueno, PR ;

Longo, E ;

Varela, JA .

CERAMICS INTERNATIONAL, 1999, 25 (01) :1-6

[15] EFFECT OF CR2O3 ON THE ELECTRICAL-PROPERTIES OF MULTICOMPONENT ZNO VARISTORS AT THE PREBREAKDOWN REGION [J].

PIANARO, SA ;

PEREIRA, EC ;

BULHOES, LOS ;

LONGO, E ;

VARELA, JA .

JOURNAL OF MATERIALS SCIENCE, 1995, 30 (01) :133-141

[16]

Wang CM, 2004, CHINESE PHYS LETT, V21, P716, DOI 10.1088/0256-307X/21/4/036

[17] Novel (Zn,Nb)-doped SnO2 varistors [J].

Wang, JF ;

Wang, YJ ;

Su, WB ;

Chen, HC ;

Wang, WX .

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 2002, 96 (01) :8-13

[18] Effects of Cr2O3 on the properties of (Co, Nb)-doped SnO2 varistors [J].

Wang, WX ;

Wang, JF ;

Chen, HC ;

Su, WB ;

Zang, GZ .

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 2003, 99 (1-3) :470-474

[19] Nects of In2O3 on the properties of (Co, Nb)-doped SnO2 varistors [J].

Wang, WX ;

Wang, JF ;

Chen, HC ;

Su, WB ;

Jiang, B ;

Zang, GZ ;

Wang, CM ;

Qi, P .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2003, 36 (08) :1040-1043

[20] Effects of Sc2O3 on the microstructure and varistor properties of (Co, Nb)-doped SnO2 [J].

Zang, GZ ;

Wang, JF ;

Chen, HC ;

Wang, WX ;

Su, WB ;

Wang, CM ;

Qi, P .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2005, 80 (05) :1093-1096

← 1 2 →