Study of thermally treated dickite by infrared and micro-Raman spectroscopy using curve-fitting technique
Study of thermally treated dickite by infrared and micro-Raman spectroscopy using curve-fitting technique
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DOI：
10.1023/a:1019954227093
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发表时间：
2002-07
影响因子：
4.4
通讯作者：
S. Shoval;K. Michaelian;M. Boudeulle;G. Panczer;I. Lapides;S. Yariv
中科院分区：
文献类型：
--
作者：
S. Shoval;K. Michaelian;M. Boudeulle;G. Panczer;I. Lapides;S. Yariv
利用透射光谱、光声红外光谱和显微拉曼光谱的曲线拟合研究了地开石在1000 ~ 1300°C空气中加热的产物。并与莫来石、铝尖晶石、方石英、无定形二氧化硅和偏地开石的光谱进行了比较。表征结晶相的谱带出现在1100°C，并且随着温度的升高而变得更强。莫来石、铝尖晶石、尖晶石和无定形二氧化硅的特征谱带被鉴定。方石英的特征红外光谱带与莫来石和无定形二氧化硅的特征红外光谱带重叠，因此根据相应谱带的强度比确定了方石英的存在。该研究清楚地表明，在利用红外和拉曼光谱研究高岭土类矿物的热处理过程中，使用曲线拟合识别高温相的优势。这种技术似乎是一种有用的方法，在陶瓷工业的材料分析。
The products of dickite heated in air at 1000 to 1300°C were studied using curve-fitting of transmission and photoacoustic infrared and micro-Raman spectra. The spectra were compared with those of mullite, Al-spinel, corundum, cristobalite, amorphous silica and meta-dickite. Bands that characterize crystalline phases appeared at 1100°C and became stronger with increasing temperature. Mullite, Al-spinel, corundum and amorphous silica were identified by their characteristic bands. The characteristic IR bands of cristobalite overlap those of mullite and amorphous silica, and its presence was therefore established from intensity ratios of the appropriate bands. The research clearly demonstrated the advantage of using curve-fitting for the identification of high temperature phases in the study of the thermal treatment of kaolin-like minerals by infrared and Raman spectroscopy. This technique seems to be a useful method for materials analysis in the ceramic industry.