高温高压下硬水铝石状态方程研究

李明; 李立新; 杨伍明; 张培峰; 高春晓; 贺春元; 郝爱民; 李延春; 李晓东; 刘景; 等

doi:10.11858/gywlxb.2008.03.020

高温高压下硬水铝石状态方程研究

doi: 10.11858/gywlxb.2008.03.020

1.
河南理工大学物理化学系，河南焦作 454000；
2.
吉林大学超硬材料国家重点实验室，吉林长春 130012；
3.
中国科学院高能物理研究所，北京 100039

详细信息

通讯作者:
高春晓

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出版历程
- 收稿日期: 2007-06-09
- 修回日期: 2007-11-17
- 发布日期: 2008-09-05

The Behavior of Diaspore under High Pressure and High Temperature

1.
Department of Physics and Chemistry, Henan Polytechnic University, Jiaozuo 454000, China;
2.
National Laboratory of Superhard Materials, Jilin University, Changchun 130012, China;
3.
Beijing Synchrotron Radiation Laboratories, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039, China

摘要

摘要: 在金刚石压砧装置上，用氧化铝膜作绝热层，借助同步辐射和双面激光加温系统，分析了硬水铝石在高温高压下的结构变化，并分别用理论和实验的方法得出了其结构参数，得到了样品在不同压力温度下的体模量。这对于人们认识和研究地壳结构和地球内部物质的演化具有重要意义。研究发现，在常温和高温时其压缩率有明显不同，在高温高压范围内，其晶格常数和晶胞体积的变化非常接近样品在高压常温下的情况；而在高温低压范围内，情形和常温时有较大差别。在实验过程中并没有发现相变的产生。
- 状态方程 /
- 衍射 /
- 同步辐射 /
- 压缩率 /
- 体模量
Abstract: The high heat conductivity and the high temperature carbonization of diamond make it difficult to achieve high temperature on diamond anvil cell, and the temperature in sample chamber is difficult to control accurately. Here we used sputtered alumina film as heat resistant layer, and an experiment at high pressure and high temperature was performed for diaspore on diamond anvil cell. Most previous experiments about diaspore for structure studying were performed at ambient temperature, and few reports of high temperature experiments were found. The changes of lattice parameters and compressibility of a-, b- and c- axis were investigated. The disputed bulk modulus was obtained by combining the experimental and computational results, and the bulk modulus of sample at high temperature and ambient temperature was compared.
- equation of state /
- diffraction /
- synchrotron /
- compressibility /
- bulk modulus

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参考文献(12)

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