| 烧结温度对WO_3系电容-压敏复合陶瓷电性能的影响(英文) |
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| 引用本文： | 王天国,邵刚勤,李喜宝,张文俊.烧结温度对WO_3系电容-压敏复合陶瓷电性能的影响(英文)[J].稀有金属材料与工程,2009,38(Z2). |
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| 作者姓名： | 王天国 邵刚勤 李喜宝 张文俊 |
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| 作者单位： | 武汉理工大学,材料复合新技术国家重点实验室,湖北,武汉,430070 |
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| 基金项目： | National Science Development Foundation of China (No.2008-80) |
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| 摘 要： | 研究了烧结温度对WO_3系电容-压敏复合陶瓷显微结构、非线性电学性能及介电性能的影响.随着烧结温度从1050 ℃到1200 ℃的升高,WO_3陶瓷的晶粒尺寸增大,压敏电压随之降低.在1150 ℃烧结条件下,掺杂0.8 mol% Y_2O_3 的WO_3 压敏陶瓷样品表现出优良的综合电性能,其非线性系数为3.5,相对介电常数为1.13×10~4.然而,过高的烧结温度,不利于样品的非线性电学性能.WO_3系电容-压敏复合陶瓷较适合的烧结温度为1150 ℃,这是因为,在此温度下最有利于样品的晶界势垒结构的形成.
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| 关 键 词： | 电容 非线性系数 电学性能 烧结温度 复合陶瓷 压敏电压 介电性能 |
Effect of Sintering Temperature on Electrical Properties of WO_3-Based Capacitor-Varistor Ceramics |
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| Wang Tianguo,Shao Gangqin,Li Xibao,Zhang Wenjun.Effect of Sintering Temperature on Electrical Properties of WO_3-Based Capacitor-Varistor Ceramics[J].Rare Metal Materials and Engineering,2009,38(Z2). |
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| Authors: | Wang Tianguo Shao Gangqin Li Xibao Zhang Wenjun |
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| Affiliation: | Wang Tianguo,Shao Gangqin,Li Xibao,Zhang Wenjun (State Key Laboratory of Advanced Technology for Materials Synthesis & Processing,Wuhan University of Technology,Wuhan 430070,China) |
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| Abstract: | The effect of sintering temperature on the microstructure, nonlinear electrical behavior, and dielectric properties of the Y_2O_3-doped WO_3 ceramics was studied. The decrease in breakdown voltage directly relates to the grain growth of WO_3 grains when increasing the sintering temperatures from 1050 to 1200 ℃. The capacitor-varistor of WO_3- 0.8 mol% Y_2O_3 composite sintered at 1150 ℃ exhibits the maximal nonlinear coefficient of 3.5 and the highest dielectric constant of 1.13 × 10~4. However, higher sintering temperature than 1150 ℃ is not favorable for the nonlinear electrical behavior of the WO_3 ceramics. The best nonlinear properties of the samples sintered at 1150 ℃ can be explained by the most efficient boundary barrier layer with can be formed sintered at the proper temperature. |
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| Keywords: | varistors sintering temperature tungsten trioxide electrical properties |
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