High strength lightweight glass-ceramics were fabricated with coal gangue and
clay as main raw materials. The utilization ratio of coal gangue, the ratio
of the coal gangue with clay, mineralization agents, forming process and
sintering process on the properties of the fabricated glass-ceramics were
optimized. The utilization ratio of coal gangue reached 75, and the ratio of
coal gangue to clay was 3/1, as an optimal property was observed. The
optimal sintering temperature was found to be 1370?C. At this optimal
temperature, the sintered glass-ceramics showed the main phase of mullite
and spindle and so showed high strength, low density, and low water
absorbance. The appropriate amounts of codoping of the TiO2, ZnO, and
MnO2/dolomite as mineralization agents obviously enhanced the properties of
the glass-ceramics. Process optimizations further determined reasonable and
optimal process parameters. The high strength lightweight glass-ceramics
fabricated in this work may be very suitable for various applications
including building materials, cooking ceramics, and proppant materials, et
al.