大学化学 >> 2023, Vol. 38 >> Issue (8): 186-191.doi: 10.3866/PKU.DXHX202209057

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二氧化钛相变的原位高温X射线衍射分析——介绍一个仪器分析拓展性实验

张万群(), 邵伟, 杨凯平, 胡万群   

  • 收稿日期:2022-09-22 录用日期:2022-11-03 发布日期:2022-11-28
  • 通讯作者: 张万群 E-mail:wqz@ustc.edu.cn
  • 基金资助:
    国家自然科学基金(GG2060190383);中国科学技术大学教改项目(2022xjyxm020);首批教育部虚拟教研室(大学化学实验课程群虚拟教研室)

In Situ High-Temperature X-ray Diffraction Study of Titanium Dioxide Phase Transformation: An Extended Instrumental Analysis Experiment

Wanqun Zhang(), Wei Shao, Kaiping Yang, Wanqun Hu   

  • Received:2022-09-22 Accepted:2022-11-03 Published:2022-11-28
  • Contact: Wanqun Zhang E-mail:wqz@ustc.edu.cn

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摘要：

介绍一个仪器分析拓展性实验——二氧化钛相变的原位高温X射线衍射分析。该实验的主要内容包括：利用原位高温X射线衍射检测二氧化钛锐钛矿到金红石相变过程，并分析相变过程中结构变化，涵盖物相、定量、晶格常数、晶粒尺寸和微观应力计算分析。通过本实验将基础晶体材料结构理论知识和多种X射线衍射分析技能相融合，培养了学生综合知识的运用能力、科研能力和创新能力。

关键词: 二氧化钛, 相变, 原位高温, X射线衍射, 仪器分析实验

Abstract:

An extended instrumental analysis experiment "In situ high-temperature X-ray diffraction study of titanium dioxide phase transformation" is recommended for undergraduates. In this experiment, the phase transformation of TiO2 was carefully investigated using in situ high-temperature X-ray powder diffraction. The structural changes, including the composition, quantification, lattice constant, grain size, and lattice strains, were analyzed during the phase transformation process. Theoretical knowledge of the basic crystal material structure and a variety of X-ray diffraction analysis skills were combined with the experiments. It is useful for students to acquire knowledge on application, scientific research, and innovation.

Key words: Titanium dioxide, Phase transformation, In situ high-temperature, X-ray diffraction, Instrumental analysis experiment