摘要
本文以湖北广济所产的海泡石石棉为研究对象，采用Ｘ射线衍射分析方法，对不同温度条件下，海泡石石棉的Ｘ射线衍射图谱特征进行了研究，阐明了热处理过程中海泡石石棉的成份、结构及性质变化特点，即３００℃以下海泡石失去吸附水，但结构性质基本保持不变；３００～８００℃海泡石失去结晶水，结构发生局部调整，形成无水海泡石矿物相；８００℃以上海泡石失去羟基水，结构破坏，矿物成份重新组合形成新矿物相斜顽辉石和方英石。
The sepiolite made in Guangji, Hunan has been studied by x-ray powder diffractiontechnique. The characteristic of x-ray powder diffraction patterns shows the structure of sepiolitechanges in three stages in the temperature ranging from 25 - 1000℃. (1 ) The zeolitlc water is removed below 300℃, but the structure of sepiolite is of no change. (2) The bound water is lostat the temperature between 300-800℃, the structure of sepiolite folds and the sepiolite turns into sepiolite anhydride. (3) The hydroxyl water disappears above 800℃, the structure of the sepiolite is broken completely and the sepiolite anhydride transfroms into enstatite and cristobalite.
关键词
海泡石
热处理
X射线衍射
石棉
sepiolite, heat, structure, x-ray powder diffraction
