铝的等温状态方程  

Isothermal Equation of State of Aluminium

作　　者：张剑[1] 谢燕武[1] 潘跃武[1] 焦虎军[1] 戴全钦[1] 崔启良[1] 刘景[2] 邹广田[1] 

机构地区：[1]吉林大学超硬材料国家重点实验室,吉林长春130012 [2]中国科学院高能物理研究所同步辐射站,北京100039

出　　处：《高压物理学报》2004年第1期75-77,共3页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金(10076005)

摘　　要：采用原位高压同步辐射X射线衍射技术,利用金刚石对顶砧(DAC)装置产生高压,选用高纯NaCl粉末作为传压介质与标压物质,在室温下、21.5GPa的压力范围内,测定了铝的等温状态方程。利用Murnaghan方程对实验结果进行了数值拟合,得到铝的零压体弹模量及其一级压力导数分别为B0=(77±2)GPa,B0′=4.8±0.3。该结果同相关文献资料报导的值在误差范围内符合得很好,略显得较大,这是由于传压介质NaCl的非静水压效应所致。在实验所达到的压力范围内,未发现明显的相变迹象。We have studied the equation of state (EOS) of aluminium by using energy dispersive synchrotron radiation X-ray diffraction technique at room temperature under in situ pressures up to 21.5 GPa. The data were fitted to Murnaghan equation of state and gave the bulk modulus and its first order derivative of aluminum: B_0=(77±2) GPa,B_0′= 4.8±0.3.We attributed the small deviation of our result from those in the literature to the nonhydrostatic effects caused by the pressure transmitting medium NaCl. Yet we have not found any convincing evidence for a phase transformation in the experimental pressure range.

关 键 词：铝 等温状态方程 高压同步辐射 DAC 零压体弹模量 X射线衍射技术 

分 类 号：O614.31[理学—无机化学] O521.2[理学—化学]