高温高压下物质的相变研究是十分重要的课题.精确地了解高压腔内的压力和温度是非常重要的。目前,常温下的压力定标工作已经做得很多.由于高温下传压介质的力学性质的变化,常温下标定的压力值已不适用于高温情况,高温下压腔内的压力得重新标定.有人采用高温高压X射线技术进行标 It is very important to study the phase transition under high temperature and high pressure.It is very important to understand the pressure and temperature in the high pressure chamber accurately. At present, pressure calibration has done a lot at room temperature.Because of the change of mechanical properties of pressure transfer medium under high temperature, the pressure value calibrated at room temperature is not suitable for high temperature conditions, and the pressure in high pressure cavity is recalibrated. Some people use high temperature and pressure X-ray technology to carry out the standard