采用50%以上的煤矸石与粉煤灰废弃物为主要原料,并添加少量的CaO、Al2O3、SiO2、MgO、K2O、Na2O等矿物原料,以CaF2/TiO2为晶核剂,经过1400～1500℃熔制、水淬和晶化热处理等过程制备出CaO-Al2O3-SiO2系微晶玻璃.首先对微晶玻璃的CaO、Al2O3、SiO2等成分进行优化设计,用TDA研究核化温度、核化时间、晶化温度、晶化时间及升温速率等热处理工艺参数的影响,采用SEM和XRD分析微晶玻璃的形貌与晶相结构,并检测其密度、吸水率、抗折强度、显微硬度、耐腐蚀性等物理力学性能.所制备的40%SiO2-15%A12O3-30%CaO(质量百分数)微晶玻璃以黄长石为主晶相,晶粒度约4 μm,具有优异的物理力学性能,在建筑材料领域有良好的应用前景.%Glass ceramics was prepared from coal gangue and coal fly ash for comprehensive utilization of coal industry wastes.Up to 50％ coal wastes and CaO, Al2O3 , SiO2 , MgO, K2O, Na2O were used as raw materials, and CaF2/TiO2 were used as nucleating agent.CaO-Al2O3-SiO2 glass ceramics were prepared following 1 400 - 1 500 ℃ melting, water quenching and crystallization.The chemical compositions such as CaO, Al2O3, SiO2 were designed, the effects of heat treatment schedule were investigated by DTA;the microstructure and morphology were analyzed by SEM and XRD;the density, adsorption rate,bending strength, microhardness, corrosion resistance of the glass ceramics were measured.The prepared 40％ SiO2-15％ Al2O3-30％ CaO glass ceramics had a major crystal phase of gehlenite with a size of 4 μm.The glass ceramics has large prospect in construction industry due to the excellent properties.
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