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| 纳米钛酸钡陶瓷的晶体结构 | |
| 引用本文： | 肖长江,靳常青,王晓慧.纳米钛酸钡陶瓷的晶体结构[J].功能材料,2007,38(10):1621-1623. |
| 作者姓名： | 肖长江 靳常青 王晓慧 |
| 作者单位： | 1. 河南工业大学,材料科学与工程学院,河南,郑州,450007;中国科学院物理研究所,北京,100080 2. 中国科学院物理研究所,北京,100080 3. 清华大学,材料科学与工程系,新型陶瓷和精细工艺国家重点实验室,北京,100084 |
| 基金项目： | 国家重点基础研究发展计划(973计划) , 河南工业大学校科研和教改项目 |
| 摘 要： | 致密的平均尺寸约为30nm钛酸钡陶瓷由压力辅助烧结得到.在变温Raman光谱的基础上,用Rietveld精修方法成功地确定了纳米钛酸钡陶瓷的晶体结构.在室温下,在30nm钛酸钡陶瓷中观测到四方相和正交相的多相共存.这种现象可以用相变产生的内应力来解释. |
| 关 键 词： | 纳米钛酸钡陶瓷 晶体结构 Raman光谱 Rietveld精修 多相共存 |
| 文章编号： | 1001-9731（2007）10-1621-03 |
| 修稿时间： | 2007-03-29 |
Crystal structure of dense nanocrystalline BaTiO3 ceramics |
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| XIAO Chang-jiang,JIN Chang-qing,WANG Xiao-hui.Crystal structure of dense nanocrystalline BaTiO3 ceramics[J].Journal of Functional Materials,2007,38(10):1621-1623. | |
| Authors: | XIAO Chang-jiang JIN Chang-qing WANG Xiao-hui |
| Affiliation: | 1. Department of Material Science and Engineering, Henan University of Technology, Zhengzhou 450007,China; 2. Institute of Physics, Chinese Academy of Science, Beijing 100080,China; 3. State Key Laboratory of New Ceramics and Fine Processing, Department of Material Science and Engineering,Tsinghua University,Beijing 100084,China |
| Abstract: | The dense nanocrystalline BaTiO3 ceramics with the average gram sine ot 30nm was preparea Dy me pressure assisted sintering. The Raman spectroscopy and the Rietveld refinement were employed to characterize the structural information of the nanocrystalline BaTiO3 ceramics. The structural parameters and the reliability factors for the nanocrystalline BaTiO3 ceramics were successfully determined by the Rietveld refinement based on the analysis of Raman spectra. A multiphase coexistence of tetragonal and orthorhombic phases at room temperature was observed in 30nm BaTiO3 ceramics. The phenomenon can be explained by the internal stress. |
| Keywords: | nanocrystalline BaTiO3 ceramics crystal structure Raman spectroscopy rietveld refinement multiphase coexistence |
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