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| TiO_2压敏电阻表面层的测定与分析 | |
| 引用本文： | 张小文,甘国友,严继康,季惠明,姬荣斌.TiO_2压敏电阻表面层的测定与分析[J].电子元件与材料,2006,25(10):41-43. |
| 作者姓名： | 张小文 甘国友 严继康 季惠明 姬荣斌 |
| 作者单位： | 1. 昆明物理研究所,云南,昆明,650223;昆明理工大学,材料与冶金工程学院,云南,昆明,650093 2. 昆明理工大学,材料与冶金工程学院,云南,昆明,650093 3. 天津大学材料科学与工程学院,天津,300072 4. 昆明物理研究所,云南,昆明,650223 |
| 摘 要： | 采用电子陶瓷工艺制备了(Nb,La)掺杂的TiO2压敏电阻。用电子探针微区成分分析方法测定了样品中氧含量随深度的变化关系。结果表明,样品表面处氧的含量高于理论值,内部低于理论值,表面“氧化层”的厚度约为20μm。利用缺陷反应和扩散原理对表面层效应进行了初步分析,指出表面层效应的研究对改善和调节材料的电学性能具有重要的指导意义。 |
| 关 键 词： | 电子技术 二氧化钛 压敏电阻 表面效应 缺陷反应 扩散 |
| 文章编号： | 1000-2028（2006）10-0041-03 |
| 收稿时间： | 2006-04-25 |
| 修稿时间： | 2006-04-25 |
Mensuration and Analysis of Surface Layer for TiO2 Varistor |
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| ZHANG Xiao-wen,GAN Guo-you,YAN Ji-kang,JI Hui-ming,JI Rong-bin.Mensuration and Analysis of Surface Layer for TiO2 Varistor[J].Electronic Components & Materials,2006,25(10):41-43. | |
| Authors: | ZHANG Xiao-wen GAN Guo-you YAN Ji-kang JI Hui-ming JI Rong-bin |
| Affiliation: | 1, Kunming Institute of Physics, Kunming 650223, China; 2, Faculty of Materials and Metallurgical Engineering, Kunming University of Science and Technology, Kunming 650093, China; 3. School of Material Science and Engineering, Tianjin University, Tianjin 300072, China |
| Abstract: | The preparation of (Nb, La)-doped TiO2 varistor by electroceramic technology was introduced. The distribution of oxygen in the sample was mensurated by electron probe microanalysis. Compared with the theoretical value of oxygen, the value mensurated is higher at surface and lower inside. The thickness of “oxidized surface layer” for TiO2 varistor is about 20 μm. The analysis of surface effect is based on defect reaction and diffusion theory, the study for surface effect will have good guidance to the improvement of electrical properties. |
| Keywords: | electronic technology titanium dioxide varistor surface effect defect reaction diffusion |
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