In Situ observations of phase transition using high-temperature neutron and synchrotron X-ray powder diffractometry
In Situ observations of phase transition using high-temperature neutron and synchrotron X-ray powder diffractometry
复制标题
使用高温中子和同步加速器 X 射线粉末衍射法原位观察相变
DOI：
10.1111/j.1151-2916.2002.tb00557.x
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发表时间：
2003
影响因子：
3.9
通讯作者：
M. Yashima
中科院分区：
文献类型：
--
作者：
M. Yashima
原位研究高温下的无扩散相变点对相图的研究具有重要意义。我们开发了高温技术来测量原位中子和同步辐射X射线粉末衍射轮廓。本文综述了我们最近的研究，使用这些方法。用于高温中子衍射研究的新炉不会产生由加热器和耐火材料引起的额外峰值;因此，我们能够从样品中测量非常小的中子信号。使用Rietveld方法分析了各种材料（如氧化锆固溶体和钛酸钙）在高达1590°C的高温下的高质量中子衍射数据。高分辨率同步辐射X射线衍射仪能够精确测定钙钛矿相关材料的相变温度。
It is of vital importance for the study of phase diagrams to investigate in situ diffusionless phase transition points at high temperatures. We have developed high-temperature techniques to measure in situ neutron and synchrotron X-ray powder diffractometry profiles. This paper reviews our recent studies obtained using these methods. The new furnace for high-temperature neutron diffraction study yields no extra peaks caused by heaters and refractory; thus, we have been able to measure very small neutron signals from the sample. Quality neutron diffraction data at high temperatures up to ∼1590°C have been analyzed using the Rietveld method for various materials, such as zirconia solid solutions and calcium titanate. High-resolution synchrotron X-ray diffractometry enables exact determination of the phase transition temperatures of perovskite-related materials.