A new type of high-temperature, high-pressure cell for spectroscopic studies of hydrous silicate melts
A new type of high-temperature, high-pressure cell for spectroscopic studies of hydrous silicate melts
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一种用于水合硅酸盐熔体光谱研究的新型高温高压池
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
W. Johannes
中科院分区：
文献类型：
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作者：
M. Nowak;H. Behrens;W. Johannes
设计了一种新型的高温高压池，用于含水硅酸盐熔体的近红外光谱和光学光谱分析，压力可达3 kbar，温度可达800 °c。它由一个外部加热的池和一个盘形样品室（直径4 mm，高0.2 mm）组成，该样品室被压缩在碳化钨活塞和圆柱形蓝宝石窗口之间。样品周围的铂环可防止实验过程中熔体或水的损失。利用这种新的光谱池，用近红外光谱法直接测量铝硅酸盐熔体中的H2O物种。该电池的其他可能应用包括在UV-VIS-NIR中研究掺杂过渡金属离子的硅酸盐熔体，以及在原位条件下观察含水硅酸盐熔体中矿物的结晶和溶解。
Abstract A novel type of high-temperature, high-pressure cell has been designed for near-infrared and optical spectroscopy of hydrous silicate melts at pressures up to 3 kbar and temperatures up to 800 °c. It consists of an externally heated cell with a disk-shaped sample chamber (4 mm in diameter and 0.2 mm in height) that is compressed between a tungsten carbide piston and a cylindrical sapphire window. A platinum ring surrounding the sample prevents loss of melt or water during the experiment. The new spectroscopic cell was used for direct measurement of H2O species in aluminosilicate melts by near-infrared spectroscopy. Other possible applications of the cell include the study of silicate melts doped with transition metal ions in the UV-VIS-NIR and the observation of the crystallization and dissolution of minerals in hydrous silicate melts under in situ conditions.