利用赤泥制备钙铝榴石微晶玻璃的实验研究  

Experimental Study on Preparation of Grossular Glass-ceramics from Red Mud

作　　者：邢净[1] 李金洪[1] 张凯[1] 

机构地区：[1]中国地质大学矿物材料国家专业实验室,北京100083

出　　处：《矿物岩石地球化学通报》2007年第2期181-184,共4页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：国家自然科学基金资助项目(40602008);矿物材料国家专业实验室开放基金资助项目(A05005)

摘　　要：在1300℃下将赤泥和石英砂熔制成基础玻璃,经粉磨、筛选后,通过二次热处理工艺获得了以钙铝榴石为主晶相的微晶玻璃。采用XRD和SEM等研究赤泥和微晶玻璃后表明,赤泥主要由方解石和霰石等钙质成分组成;热处理温度对微晶玻璃性能和钙铝榴石晶体结构的影响较大。优化的制备条件为:核化900℃,1h,晶化1105℃,2h,该条件下所得的微晶玻璃晶相含量较高,晶体发育完整,性能良好,相应的体积密度为2.79g/cm3,显微硬度为6.52。The glass-ceramics have been prepared through sintering of red mud and quartz sand. The based glasses were obtained by melting materials of designed batch at 1300℃, and then were milled, sieved, and then were used to prepare grossular glass-ceramics through double heating treatment. XRD and SEM were applied to study the red mud and glass-ceramics. The results showed that the red mud is mainly composed of calcite and aragonite. The properties of glass-ceramics and the crystal structure of grossular are relative strongly affected by the heating tem- perature. The optimum condition for the preparation of grossular glass-ceramics is nucleating at 900℃ for 1 hour and crystallizing at 1105℃ for 2 hours. The glass-ceramics prepared under this condition contain high crystal contents with euhedral crystals, good properties, bulk density of 2.79 g/cm^3 , and micro hardness of 6.52.

关 键 词：微晶玻璃 赤泥 钙铝榴石 

分 类 号：P579[天文地球—矿物学]