论文部分内容阅读
基于热处理制度对微晶玻璃析晶行为的重要影响,研究了核化温度和晶化温度对CaO-MgO-SiO2系温石棉尾矿微晶玻璃析晶行为的影响。通过DTA分析初步确定基础玻璃成核和晶化温度范围;采用X射线衍射和扫描电镜分析微晶玻璃的物相组成和显微形貌。结果表明:随着核化和晶化温度的升高,微晶玻璃样品主晶相由铁橄榄石转变为黄长石,且样品的析晶能力逐渐增强;次晶相镁橄榄石和透辉石逐渐消失。且通过热处理过程使石棉纤维相变为对环境无害的硅酸盐矿物。
Based on the important influence of heat treatment on the crystallization behavior of glass-ceramics, the influence of nucleation temperature and crystallization temperature on the crystallization behavior of CaO-MgO-SiO2 as-chitosan tailings glass ceramics was studied. The basic glass nucleation and crystallization temperature range were determined by DTA analysis. The phase composition and micro-morphology of glass-ceramic were analyzed by X-ray diffraction and scanning electron microscopy. The results show that with the increase of nucleation temperature and crystallization temperature, the main crystalline phase of the glass-ceramic sample changes from fayalite to feldspar, and the crystallization ability of the sample gradually increases; the forsterite and diopside gradually disappear . And the asbestos fibers are transformed into environmentally friendly silicate minerals by the heat treatment process.