Abstract: Aiming at exploring the phase transition behavior of BaCO3 under high temperature and high pressure, the differential scanning calorimeter (DSC) was employed to characterize the process of phase transition of BaCO3 from room temperature to 1 200 ℃, and Raman spectrometer was adopted to analyze the phase transition features of BaCO3 from atmospheric pressure to 15.2 GPa. According to the DSC analysis results, there were two endothermic peaks of BaCO3 at 808 ℃ and 955 ℃, which corresponded to the transitions of orthorhombic phase to trigonal phase and trigonal phase to cubic phase, respectively. When the pressure rose from atmospheric pressure to 10.6 GPa, the frequency shift of all Raman modes of BaCO3 increased monotonically, and no phase transition of BaCO3 was found under the pressure below 10.6 GPa. The phase transition of BaCO3 from orthorhombic (Pmcn) to trigonal (P31c) structure occurred around 10.6 GPa, and no further change in BaCO3 phases could be recognized in the spectra when the pressure exceeded 10.6 GPa. From the Raman spectra of pressure released BaCO3, v1 symmetric stretching band of the [CO3] did not retrogress from high pressure phase (trigonal structure) of BaCO3 to ambient phase (orthorhombic structure).
作者简介: 穆巴拉克·木里提江,2015年6月毕业于新疆大学,获得理学学士学位。现为新疆大学硕士研究生,在艾尼瓦尔·吾术尔博士的指导下进行研究。目前主要研究方向为高压物理;艾尼瓦尔·吾术尔博士,新疆大学学士 (1995),日本筑波大学硕士, 博士 (2006)。2006年4月至2011年4月在美国夏威夷大学Manoa校区的地球物理和天体学学院工作。现为新疆大学物理科学与技术学院老师。2012 年入选中国新疆自治区引进高层次人才计划。2013年入选中组部海外高层次人才引进计划“千人计划新疆项目”。主要研究方向为高压高温下制备新材料,并利用X射线衍射和光散射技术在高温高压下研究地球物质和材料特性。目前为止已在SCI国际权威期刊上发表了相关论文33篇,包括Journal of Physics、 Journal of Solid State Chemistry、 American Mineralogist、 Journal of Applied Physics、 Physical Review B等, 被引用347次, H指数11。13次参加国际学术会议并做会议报告。
引用本文:
穆巴拉克·木里提江, 艾尼瓦尔·吾术尔, 王静, 鲁雅荣. 碳酸钡在高温及高压下的相变行为[J]. 材料导报, 2019, 33(24): 4062-4065.
Mubarak Molutjan, Anwar Hushur, WANG Jing, LU Yarong. Phase Transition of BaCO3 Under High Temperature and High Pressure. Materials Reports, 2019, 33(24): 4062-4065.
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2019, Vol. 33 
