| 多晶BaTiO3陶瓷的纳米非均匀性与电性能 |
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| 引用本文： | 孙鸿涛 张良莹. 多晶BaTiO3陶瓷的纳米非均匀性与电性能[J]. 硅酸盐学报, 1994, 22(2): 134-140 |
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| 作者姓名： | 孙鸿涛 张良莹 |
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| 作者单位： | 西安交通大学电子材料与器件研究室 |
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| 摘 要： | 发现了多晶ＢａＴｉＯ３陶瓷晶界附近的化学组成具有纳米尺度上的非均匀性，研究了非均匀性对陶瓷电性能的作用。ＰＴＣ热敏电阻器的电阻温度关系可用势垒模型说明：ＢＬ电容器的介电温谱要用壳层模型才能解释，这种差别主要由于晶界区的纳米非均匀性。
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| 关 键 词： | 钛酸钡 陶瓷 多晶 非均匀性 电性能 |
NANOMETER INHOMOGENEITY AND ELECTRIC PROPERTIES OF POLYCRYSTALLINE BaTiO_3 CERAMICS |
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| Sun Hongtao,ZhangLiangying,YaoXi. NANOMETER INHOMOGENEITY AND ELECTRIC PROPERTIES OF POLYCRYSTALLINE BaTiO_3 CERAMICS[J]. Journal of The Chinese Ceramic Society, 1994, 22(2): 134-140 |
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| Authors: | Sun Hongtao ZhangLiangying YaoXi |
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| Abstract: | Nanometer inhomogeneity in chemical composition is found in the vicinity of grain boundary ofpolycrystalline BaTiO_3 ceramics,Based on the inhomogeneity,the effects of grain and grain boundary on electricproperties are analysed and discussed.For boundary-dominated ceramics,teml)erature-dependent resistancesof PTC thermistor can be simulated by the barrier model.However,dielectric temperature spectra of BL capacitorhave to be simulated by shell model.The difference is mainly due to ceramic nanometer inhomogeneity in thevicinity of grain boundary. |
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| Keywords: | barium titanate ceramics inhomogeneity grain boundary |
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