等结构
四方晶系
共沉淀
相变
材料科学
拉曼光谱
粉末衍射
相(物质)
结晶学
电阻率和电导率
衍射
晶体结构
分析化学(期刊)
化学
凝聚态物理
无机化学
有机化学
光学
工程类
物理
电气工程
作者
Xiaotong Zhang,Yang Gao,Zhenfang Xing,Di Peng,Yonghao Han
摘要
In this work, we prepared a BiOBr powder sample by the coprecipitation method for in situ high-pressure AC impedance spectroscopy tests, in situ high-pressure Raman measurements and in situ high-pressure X-ray diffraction experiments to explore its structural properties and electrical transport processes under compression. Two pressure-driven isostructural phase transitions, T-T' and T'-T'' (T - tetragonal, T' - tetragonal 1 and T'' - tetragonal 2), were discovered at around 10.0 and 15.0 GPa, respectively. The pressure-induced changes in the crystal structure and electrical transport of BiOBr can provide a reference for explaining the mechanism of the isostructural phase transition of other similar compounds after compression.
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