| 氧化锌压敏陶瓷几何效应的统计法研究 |
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| 引用本文： | 李盛涛,刘辅宜,贾广平.氧化锌压敏陶瓷几何效应的统计法研究[J].无机材料学报,1997,12(4):525-530. |
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| 作者姓名： | 李盛涛 刘辅宜 贾广平 |
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| 作者单位： | 西安交通大学电气工程学院; 西安 710049 |
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| 基金项目： | 国家自然科学基金!59507005 |
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| 摘 要： | 本文实验研究了ZuO压敏陶瓷击穿、非线性指数α和脉冲大电流冲击后击穿场强E1mA变化率的几何效应．对ZuO晶粒尺寸的统计分析表明它基本服从正态分布．建立了微观结构模型，计算机模拟得到的击穿几何效应规律与实验规律相同．临界厚度dc与方差σ2和平均晶粒尺寸μ的乘积成正比．
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| 关 键 词： | ZnO陶瓷 几何效应 微观结构 |
| 收稿时间： | 1996-8-28 |
| 修稿时间： | 1996-10-28 |
A Study on Dimensional Effect of ZnO Varistors by Means of Statistics |
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| LI Shengtao,LIU Fuyi,JIA Guangping.A Study on Dimensional Effect of ZnO Varistors by Means of Statistics[J].Journal of Inorganic Materials,1997,12(4):525-530. |
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| Authors: | LI Shengtao LIU Fuyi JIA Guangping |
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| Affiliation: | School of Electrical Engineering; Xi an Jiaotong University Xi an 710049 China）（Xi an Radio Factory No.2 Xi an 710015 China |
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| Abstract: | The dimensional effects of breakdown strength, nonlinear coefficient and change in breakdown strength due to current impulse were experimentally studied. The distribution of ZnO grain size was statistically analyzed, which was obtained to be normal distribution. A microstructure model was proposed. The thickness dependence of the breakdown strength E1mA obtained by means of computer sinmlatiou is the same as cxperimental one. The critical thickness dc is proportional to the product of variance σ2 and average length μ of ZnO grains. |
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| Keywords: | ZnO ceramics dimensional effect microstructure |
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