| LaxBi2-xTi4O11的合成及相变研究 |
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| 引用本文： | 孟进芳,邹广田,崔启良,赵永年.LaxBi2-xTi4O11的合成及相变研究[J].物理学报,1994,43(10):1739-1744. |
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| 作者姓名： | 孟进芳 邹广田 崔启良 赵永年 |
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| 作者单位： | 吉林大学超硬材料国家重点实验室 |
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| 摘 要： | 合成了ＬａxＢｉ2-xＴｉ4Ｏ11系列样品，并完成了它们的喇曼光谱和ｘ射线衍射测量；结果表明，该体系在Ｘ＝１．２经历了一次相变，且相变与最低频声子模随Ｘ的变化有关。Ｌａ0.2Ｂｉ1.8·Ｔｉ4Ｏ11的相变温度为２００℃。初步获得Ｌａ2Ｔｉ4Ｏ11的结构为正交结构。
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| 关 键 词： | 钛酸铋 镧 掺杂 合成 相变 |
| 收稿时间： | 1993-10-18 |
STUDY ON THE SYNTHESIS AND PHASE TRANSITION OF LaxBi2-xTi4O11 |
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| MENG JUN-FANG,ZOU GUANG-TIAN,CUI QI-LIANG and ZHAO YONG-NIAN.STUDY ON THE SYNTHESIS AND PHASE TRANSITION OF LaxBi2-xTi4O11[J].Acta Physica Sinica,1994,43(10):1739-1744. |
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| Authors: | MENG JUN-FANG ZOU GUANG-TIAN CUI QI-LIANG and ZHAO YONG-NIAN |
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| Abstract: | The system LaxBi2-xTi4O11 has been synthesised, their Raman spectra and powder X ray diffraction pattern as well as the high temperature Raman spectra of Ｌａ0.2Ｂｉ1.8Ｔｉ4Ｏ11 have been measured. The results show that the phase transition at x=1.2 occurring in LaxBi2-xTi4O11 is correlated with the lowest frequency phonon mode. The Phase transition temperature of Ｌａ0.2Ｂｉ1.8Ｔｉ4Ｏ11 is 200℃. The structure of La2Ti4O11 can be considered as an orthorhombic one. |
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