Microstructural evolution during sintering of Bi2O3-doped ZnO

被引:0
|
作者
H. R. Chen
Y. R. Wang
C. Y. Chang
R. T. Chang
T. L. Tsai
Y. W. Lao
S. T. Kuo
C. L. Hsieh
W. H. Tuan
机构
[1] Walsin Technology Corporation,Department of Material Science & Engineering
[2] National Taiwan University,undefined
来源
Journal of Electroceramics | 2008年 / 21卷
关键词
ZnO; Sintering; Microstructure; Grain size distribution;
D O I
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中图分类号
学科分类号
摘要
The electrical properties of a ceramic varistor depend strongly on its microstructural uniformity. In the present study, the microstructure of the Bi2O3-doped ZnO after sintering is characterized. A very small amount, 0.04 mol%, of Bi2O3-addition may induce density inhomogeneity in the early stage of sintering. A critical amount, >0.09 mol%, of Bi2O3 is needed to result in density uniformity. The addition of Bi2O3 can enhance the coarsening rate of ZnO grains; nevertheless, the grain size distribution is not affected.
引用
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页码:361 / 364
页数:3
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