Pressure-Induced Phase Transition in BaTiO3 Nanocrystals

LI Feng-Ying; CHEN Liang-Chen; JIN Chang-Qing; YOU Shu-Jie; XIAO Chang-Jiang; YU Ri-Cheng; WANG Xiao-Hui; LIU Jing; LI Xiao-Dong; LI Yan-Chun

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Pressure-Induced Phase Transition in BaTiO3 Nanocrystals

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@@ The crystalstructure 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 BaTiO3nanocrystals that are tetragonal phase with grain sizes more than 100nm, but also in the samples of BaTiO3nanocrystals that are cubic phase with grain sizes less than 100 nm. The pressures of phase transition are found to increase with decrease of the grain size from about 4 to 10 GPa 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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《中国物理快报：英文版》 |2006年第5期|1249-1252|共4页
作者
LI Feng-Ying; CHEN Liang-Chen; JIN Chang-Qing; YOU Shu-Jie; XIAO Chang-Jiang; YU Ri-Cheng; WANG Xiao-Hui; LIU Jing; LI Xiao-Dong; LI Yan-Chun;
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Institute of Physics, Chinese Academy of Sciences, Beijing 100080;

Institute of Physics, Chinese Academy of Sciences, Beijing 100080;

Institute of Physics, Chinese Academy of Sciences, Beijing 100080;

Institute of Physics, Chinese Academy of Sciences, Beijing 100080;

Institute of Physics, Chinese Academy of Sciences, Beijing 100080;

Department of Materials, Tsinghua University, Beijing 100084;

Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039;

Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039;

Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039;

Institute of Physics, Chinese Academy of Sciences, Beijing 100080;

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正文语种 chi
中图分类物理学;
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Pressure-Induced Phase Transition in BaTiO3 Nanocrystals

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