| LiCoO2陶 瓷 的 力 学 谱 和 电 导 特 性 |
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| 引用本文： | 欧阳红群，刘文峰，桑茂，陈岚，朱可，熊小敏.LiCoO2陶 瓷 的 力 学 谱 和 电 导 特 性[J].上海交通大学学报,2010,44(5):679-0682. |
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| 作者姓名： | 欧阳红群，刘文峰，桑茂，陈岚，朱可，熊小敏 |
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| 作者单位： | （中山大学 物理科学与工程技术学院， 广州 510275） |
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| 摘 要： | 摘要： 以Li2CO3、Co3O4和C2H5OH为原料，用固相反应法制备LiCoO2陶瓷，利用动态力学分析仪分析其在123～573 K时内耗与温度的关系，并利用四端法结合低温测试装置测量150～320 K范围内的LiCoO2陶瓷电导率.结果表明，LiCoO2陶瓷在170 K附近出现一个相变内耗峰，且其电导率随温度升高而明显增大.这是由于LiCoO2陶瓷在170 K附近产生了相变并使热激发的电导性质发生变化，从而使其激活能成倍增加.
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| 关 键 词： | 钴酸锂 内耗 相变 电导率 |
| 收稿时间： | 2009-3-1 |
Characteristic of Mechanical Spectra and Electronic Transport Property of LiCoO2 Ceramic |
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| OU YANG Hong qun,LIU Wen feng,SANG Mao,CHEN Lan,ZHU Ke,XIONG Xiao min.Characteristic of Mechanical Spectra and Electronic Transport Property of LiCoO2 Ceramic[J].Journal of Shanghai Jiaotong University,2010,44(5):679-0682. |
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| Authors: | OU YANG Hong qun LIU Wen feng SANG Mao CHEN Lan ZHU Ke XIONG Xiao min |
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| Institution: | （School of Physics and Engineering, Sun Yat Sen University, Guangzhou 510275, China） |
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| Abstract: | LiCoO2 ceramics were synthesized by solid state reaction. An internal friction peak of phase transition type was observed around 170 K for LiCoO2 ceramics via dynamic mechanical analysis (DMA) in the temperature range of 123-573 K, which corresponds to the turning point in the plot of the logarithm of conductivity versus the inverse of temperature (ln σ-1/T). It shows that the phase transition at 170 K could change the electronic transport property and the activation energy doubles in the high temperature portion in LiCoO2 . |
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