Microstructure and electrical properties of ZnO-Bi2O3-based varistor ceramics by different sintering processes

被引：118

作者：

Xu, Dong ^{[1
,2
]}

Shi, Liyi ^{[1
,2
]}

Wu, Zhenhong ^{[1
]}

Zhong, Qingdong ^{[2
]}

Wu, Xinxin ^{[3
]}

机构：

[1] Shanghai Univ, Res Ctr Nano Sci & Technol, Shanghai 200444, Peoples R China

[2] Shanghai Univ, Sch Mat Sci & Engn, Shanghai 200072, Peoples R China

[3] Shanghai Univ, Coll Sci, Shanghai 200444, Peoples R China

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2009年 / 29卷 / 09期

关键词：

Varistors; ZnO; Sintering; Final microstructure; Electrical properties; OXIDE BASED VARISTORS; DOPED-ZNO VARISTORS; ZINC-OXIDE; GRAIN-GROWTH; NANOCRYSTALLINE ZNO; CONSTITUENT PHASES; TEMPERATURE; BEHAVIOR; SB2O3; BI2O3;

D O I：

10.1016/j.jeurceramsoc.2008.10.020

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effect of sintering processes, such as open sintering, sintering inside a closed crucible, and sintering within a powder bed, on the microstructure and V-I characteristics of ZnO-Bi2O3-based varistor ceramics was investigated at sintering temperatures in the range 1000-1200 degrees C. The results from the experiments showed that the microstructure and electrical properties of the samples varied according to the sintering method and temperature. Optimal values for the electrical characteristics of the varistor ceramics by different sintering processes were obtained when the sintering was conducted at 1100 degrees C. At the same sintering temperature, the different processes affected the properties differently. At 1000 degrees C, the samples sintered within a powdered bed showed better electrical properties than those subjected to the other two processes, while at 1100 or 1200 degrees C, the samples sintered in an open crucible exhibited the best electrical properties. (C) 2008 Published by Elsevier Ltd.

引用

页码：1789 / 1794

页数：6

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