Comprehensively utilizing waste coal gangue to fabricate high strength glass-ceramics
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초록
Waste coal gangue was utilized for the fabrication of strength glass-ceramics for environmental management. The optimalutilization rate of coal gangue is 55 wt.% when the utilization rate of another mineral material bauxite is 35 wt.%. The mulliteshowing high strength is the main crystal phase in the sintered glass-ceramics. The effect of various processing parameters onthe microstructure and mechanical performances of the sintered glass-ceramics was systematically studied. Mineralizationagent BaCO3 and MnCO3 resulted in remarkable enhancement of the mechanical properties of the sintered glass-ceramics. The strength of 148.36-156.12 MPa, water absorption of 0.17-0.02%, and a density of 2.66-2.68 g/cm3 were achieved for thesintered glass-ceramics. The process of forming and sintering also showed a remarkable effect on the microstructural andmechanical properties. By optimization experiments, optimal processing parameters were also determined.
Abstract
Waste coal gangue was utilized for the fabrication of strength glass-ceramics for environmental management. The optimalutilization rate of coal gangue is 55 wt.% when the utilization rate of another mineral material bauxite is 35 wt.%. The mulliteshowing high strength is the main crystal phase in the sintered glass-ceramics. The effect of various processing parameters onthe microstructure and mechanical performances of the sintered glass-ceramics was systematically studied. Mineralizationagent BaCO3 and MnCO3 resulted in remarkable enhancement of the mechanical properties of the sintered glass-ceramics. The strength of 148.36-156.12 MPa, water absorption of 0.17-0.02%, and a density of 2.66-2.68 g/cm3 were achieved for thesintered glass-ceramics. The process of forming and sintering also showed a remarkable effect on the microstructural andmechanical properties. By optimization experiments, optimal processing parameters were also determined.
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