| 关于MgF2氧化问题的 Rietveld 全谱拟合研究 |
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| 引用本文： | 刘艳美,赵宗彦,李爱侠,杨坤堂,韩家骅,孙兆奇.关于MgF2氧化问题的 Rietveld 全谱拟合研究[J].安徽大学学报(自然科学版),2002,26(4):46-50. |
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| 作者姓名： | 刘艳美 赵宗彦 李爱侠 杨坤堂 韩家骅 孙兆奇 |
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| 作者单位： | 安徽大学,物理系,安徽,合肥,230039 |
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| 基金项目： | 国家自然科学基金;59972001; |
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| 摘 要： | 用Rietveld全谱拟合方法研究了MgF2在大气中随着温度的升高转变为MgO的过程,确定了其转变条件、精化了转变前后的相关参数.结果表明:纯MgF2在大气中于800℃左右开始向MgO转变,Ag加MgF2与单纯MgF2在促成MgO的生成方面无异,MgF2在700℃左右存在一个异常膨胀区,MgF2的两个F原子随温度升高有一种围绕Mg原子转动的趋势.
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| 关 键 词： | MgF2氧化 Rietveld全谱拟合 固态相变 |
| 文章编号： | 1000-2162(2002)04-0046-05 |
Study of oxidization of MgF2 by the rietveld method of whole pattern fitting |
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| LIU Yan-mei,ZHAO Zong-yan,LI Ai-xia,YANG Kun-tang,HAN Jia-hua,SUN Zhao-qi.Study of oxidization of MgF2 by the rietveld method of whole pattern fitting[J].Journal of Anhui University(Natural Sciences),2002,26(4):46-50. |
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| Authors: | LIU Yan-mei ZHAO Zong-yan LI Ai-xia YANG Kun-tang HAN Jia-hua SUN Zhao-qi |
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| Abstract: | The transformation of MgF 2 to MgO with increasing temperature is investigated by Rietveld structure refinement.The condition of MgF 2changing into MgO has been determined,structural parameters at different temperatures refined.The refined results show that pure MgF 2 in air begins to change into MgO at 800℃ or so ,structural parameters of MgF 2 unusually change with increasing temperature and F atom'site always tends to turn round Mg'. |
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| Keywords: | MgF 2 oxidization the Rietveld method of whole pattern fitting solid transformation |
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