摘要
作者采用差热分析、红外光谱、X射线衍射,X射线萤光分析等现代测试技术,对高岭石在680—980℃之间的结构变化及其产物进行了深入的研究。实验表明,高岭石在920—980℃之间,其结构发生了重大变化,可用反应式表示为:3(Al_2O_3·2SiO_2)→3Al_2O_3·2SiO_2+4SiO_2,其中Al^(3+)的配位数为4和6。
In this paper, the structural change and its products of kaolinite at 680-980℃ have been studied by DTA. IR. XRD and x-ray fluorescence spectronietric analysis. The experiment shows that the structural change occurs at 920-980℃, and it can be described as: 3(A1_2O_3 · 2SiO_2)-3Al_2O_3 · 2SiO_2 + 4SiO_2. The coordination of A1^(3+) here is 4 and 6.
关键词
高岭石
结构变化
高温
高岭土
kaolinite, structural change, product, at 680-980℃.
