高压下石英的激光拉曼光谱研究

Study of Quartz's Roman Spectrum at High Pressure and Room Temperature

在高压实验中,石英的相变被广泛作为实验仪器压力校正的标准,而在压力较低的情况下,石英通常还被用作压力指示剂,用来指示金刚石压腔中的压力。Christian等曾经论述了石英的拉曼特征峰的漂移小于20cm-1时,其漂移量与压力的关系式。为了扩大关系式的适用范围,笔者利用金刚石压腔,以目前广泛使用的压力指示剂—红宝石作为压力指示剂,通过实验讨论了该关系式,拟合出了与该关系式不同的一种新的关系式:P(MPa)=-1.094 83E7+67 495.237 31×ΔV-138.706 91(ΔV)2+0.095 04(ΔV)3。

Phase transition of quartz is widely used in the high pressure experiment as the standard of pressure correcting of the laboratory instrument.And the quartz is usually used as the pressure sensor in the experiment when the pressure is low.Christian S et al discussed the function between the pressure and the shift of quartz＇s Raman spectrum peak when the shift isn＇t exceeding 20 cm-1.In order to extend the applying range,the authors discussed the function again using the diamond anvil cell,and used ruby as the pressure sensor which is widely used in the high pressure experiment.After discussing the function,we obtained a new function that is P（MPa）=-1.094 83E7＋67 495.237 31×ΔV-138.706 91（ΔV）2＋0.095 04（ΔV）3 which is different from the Christian＇s function.