| Effect of CeO2 on Electrical Properties of （Nb, Mn）-Doped TiO2 Varistor Ceramics |
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| 引用本文： | 王茂华,胡克鳌,赵斌元,张南法.Effect of CeO2 on Electrical Properties of （Nb, Mn）-Doped TiO2 Varistor Ceramics[J].中国稀土学报(英文版),2005,23(6):706-709. |
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| 作者姓名： | 王茂华 胡克鳌 赵斌元 张南法 |
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| 作者单位： | State Key Laboratory of MMCs Shanghai Jiaotong University Shanghai 200030 China，State Key Laboratory of MMCs Shanghai Jiaotong University Shanghai 200030 China，State Key Laboratory of MMCs Shanghai Jiaotong University Shanghai 200030 China，Changzhou Chuangjie Lightning Protection Co. Ltd Changzhou 213016 China |
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| 摘 要： | Varistor ceramics are a class of semiconductor de-vices with high non-linearity in their current-voltage(V-I)characteristics.Among these,ZnO varistor isthe most typical material and is commercially used asvoltage suppressor to protect electronic componentsand power systems1~4].However,ZnOis a kind ofpure resistance component and has low permittivity,high dielectric dissipation,lowresponse speed,andpoor ability to absorb high frequency noise and pulsesurge.Soits applicationis restrictedin el…
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| 关 键 词： | TiO2 电工陶瓷 电性能 CeO2 掺杂 稀土 |
| 文章编号： | 1002-0721（2005）06-0706-04 |
| 收稿时间： | 2004-12-29 |
| 修稿时间： | 2005-04-17 |
Effect of CeO2 on Electrical Properties of (Nb,Mn)-Doped TiO2 Varistor Ceramics |
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| Wang Maohua,Hu Keao,Zhao Binyuan,Zhang Nanfa.Effect of CeO2 on Electrical Properties of (Nb,Mn)-Doped TiO2 Varistor Ceramics[J].Journal of Rare Earths,2005,23(6):706-709. |
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| Authors: | Wang Maohua Hu Keao Zhao Binyuan Zhang Nanfa |
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| Abstract: | The electrical properties of TiO2-based varistor ceramics with different amount of CeO2 were investigated by measuring the properties of V-I, permittivity, density and boundary defect barriers. It is found that an optimal composition doped with 0.7% CeO2 exhibits the highest nonlinear coefficient of 10.5, the highest breakdown voltage of 12.77consistent with the highest and narrowest grain-boundary defect barriers. In order to illustrate the grain boundary barriers formation in TiO2-Nb2O5-MnCO3-CeO2 varistor, an grain-boundary defect barrier model was also introduced. |
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| Keywords: | varistor defect barrier model TiO2 CeO2 electrical properties rare earths |
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