| Pressure-Induced Phase Transition in BaTiO3 Nanocrystals |
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| 引用本文： | 李凤英 靳常青 游淑洁 肖长江 禹日成 王晓慧 刘景 李晓东 李延春 陈良辰. Pressure-Induced Phase Transition in BaTiO3 Nanocrystals[J]. 中国物理快报, 2006, 23(5): 1249-1252 |
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| 作者姓名： | 李凤英 靳常青 游淑洁 肖长江 禹日成 王晓慧 刘景 李晓东 李延春 陈良辰 |
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| 作者单位： | [1]Institute of Physics, Chinese Academy of Sciences, Beijing 100080 [2]Department of Materials, Tsinghua University, Beijing 100084 [3]Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos 50371099 and 50321101, and the National Key Basic Research and Development Programme of China under Grant No 2002CB613301. |
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| 摘 要： |
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| 关 键 词： | 压力诱导 相转换 BaTiO3微晶 晶体结构 电特性 |
| 收稿时间： | 2005-08-16 |
| 修稿时间： | 2005-08-16 |
Pressure-Induced Phase Transition in BaTiO3 Nanocrystals |
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| LI Feng-Ying, JIN Chang-Qing, YOU Shu-Jie, XIAO Chang-Jiang, YU Ri-Cheng, WANG Xiao-Hui, LIU Jing, LI Xiao-Dong, LI Yan-Chun, CHEN Liang-Chen. Pressure-Induced Phase Transition in BaTiO3 Nanocrystals[J]. Chinese Physics Letters, 2006, 23(5): 1249-1252 |
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| Authors: | LI Feng-Ying JIN Chang-Qing YOU Shu-Jie XIAO Chang-Jiang YU Ri-Cheng WANG Xiao-Hui LIU Jing LI Xiao-Dong LI Yan-Chun CHEN Liang-Chen |
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| Affiliation: | 1 Institute of Physics, Chinese Academy of Sciences, Beijing 100080; 2 Department of Materials, Tsinghua University, Beijing 100084; 3 Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039 |
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| Abstract: | The crystal structure and electric properties of BaTiO3 nanocrystals are studied by in situ high-pressure synchrotron radiation x-ray powder diffraction. The phase transition takes place not only in the samples of BaTiO3 nanocrystals that are tetragonal phase with grain sizes more than 100nm, but also in the samples of BaTiO3 nanocrystals that are cubic phase with grain sizes less than 100nm. The pressures of phase transition are found to increase with decrease of the grain size from about 4 to 10GPa for crystallites ranging from 200 to 10nm in radius. The bulk moduli are calculated according to Birch-Murnaghan state equation before and after the phase transition. |
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