碳硅石压腔在高温高压拉曼光谱研究中的应用  

Applications of Moissanite Anvil Cell for Raman Spectroscopy un der High-Temperature and High-Pressure

作　　者：段体玉[1] 孙樯[1] 郑海飞[1] 

机构地区：[1]北京大学地球与空间科学学院

出　　处：《光谱学与光谱分析》2005年第6期902-905,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(项目编号:40173019;10299040);教育部博士点基金项目(项目编号:20030001053)资助

摘　　要：描述了碳硅石压腔的结构和特点。碳硅石压腔主要包括碳硅石压砧、支撑加压系统、加热系统和金属垫片等部分。合成碳硅石的硬度高、热导性好、膨胀系数小、热稳定性好,并且它的晶体颗粒大,透明度好,价格也很便宜,因此是一种很好的压砧材料。还介绍了应用碳硅石压腔对Na2 CO3溶液、Na2 SO4 溶液、水的拉曼光谱进行高温高压原位测量的实例。This paper introduces the structure and the feature of moissanite anvil cell, which is composed of moissanite anvil, supporting and creating pressure system, heater system and metal gasket. Because of its high hardness, high heat conductance, low thermal expansion, good thermal stability and low price, moissanite is a good material of anvil for high-temperature and high-pressure experimental studies. With this cell, the Raman spectrum of sodium carbonate solution, sodium sulfate solution and distilled water has been in situ measured under high-temperature and high-pressure. With increasing pressure, it can be observed that the 1 066 cm(-1) Raman modes of sodium carbonate solution and the 982 cm(-1) Raman modes of sodium sulfate solution shift to high wave numbers obviously. With increasing temperature, the frequency at maximum intensity shifts to high wave numbers, the full width at half-maximum intensity decreases in the Raman spectrum of water.

关 键 词：高温高压 碳硅石压腔 拉曼光谱 原位测量 

分 类 号：O657.3[理学—分析化学]