用于硅酸盐熔体微结构研究的高温Ramam光谱技术

硅酸盐熔体微结构通常在熔态下进行实验研究，而不是采用淬冷物质或玻璃样品的间接研究方法。为此比较了当前若干微结构测试方法用于高温的可能性，方法的特点，适用范围和缺陷。此处介绍一种高温Raman光谱技术，它配备了显微热台，实现了高温达1623K的共焦显微Raman；并采用了光谱信号的时间分辨检测技术，实现了可达2023K温度下的宏观Raman，拓展了Raman光谱研究高温物质结构的应用。通过对硅酸盐等熔体的Raman光谱测定和相关淬冷玻璃光谱的比较研究，表明高温Raman光谱是实时和原位研究熔体微结构的有效实验方法，同时探讨了将电荷耦合探测技术引入高温Raman光谱技术的可行性。

HIGH TEMPERATURE RAMAN SPECTROSCOPY USED IN THE STUDY OF MICROSTRUCTURE OF SILICATE MELTS

Study on microstructure of silicate melts is usually on the base of experiments carried out directly in rnolten state. Following the analysis of this point of view, the possibility of using various experimental methods for analyzing microstructure of silicate melts under high temperature was discussed. A technology of high temperature Raman spectroscopy is reported. It is constructed of micro-Raman with the characteristics of up to l 623 K micro heating stage and high spatial resolution, and also it is assembled as up to 2023 K macro-Raman with time-resolved detect system by using pulsed semiconductor laser. Comparison made by Raman spectra measurement between melts and correspondent quenched glasses shows that high temperature Raman spectroscopy is effectively applied in micro-structure study in situ of materials at high temperature. Finally, the possible modi-fication by using charge coupled detector combined with high temperature Raman technique is also discussed.