Preparation and characterization of glass-ceramics with α-cordierite as the main crystalline phase from bluestone tailings
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The bluestone tailings are quickly expanded in China with the continuous utilization and mining of bluestone resources. Theincremental recycling of bluestone tailings is important to solve the resources waste and environmental pollution. This studyaims to reuse the bluestone tailings as the main material to prepare α-cordierite glass-ceramics based on melting process. Theresults show that the nucleation temperature, crystallization peak temperature and the activation energy for crystallizationdecreased gradually with increasing the percentage of bluestone tailings. The complete preparation parameters of α-cordieriteglass-ceramics include a bluestone tailings percentage of 70%, a heating rate of 5 oC·min^-1, a crystallization duration of 1.5h, a crystallization temperature of 970 oC, a nucleation temperature of 830 oC, and a nucleation duration of 1.0 h. Theperformances analyses reveals that the α-cordierite glass-ceramics based on the optimized parameters exhibits high densityand Vickers hardness, low dielectric loss and water absorption, and strong chemical resistance.
Abstract
The bluestone tailings are quickly expanded in China with the continuous utilization and mining of bluestone resources. Theincremental recycling of bluestone tailings is important to solve the resources waste and environmental pollution. This studyaims to reuse the bluestone tailings as the main material to prepare α-cordierite glass-ceramics based on melting process. Theresults show that the nucleation temperature, crystallization peak temperature and the activation energy for crystallizationdecreased gradually with increasing the percentage of bluestone tailings. The complete preparation parameters of α-cordieriteglass-ceramics include a bluestone tailings percentage of 70%, a heating rate of 5 oC·min^-1, a crystallization duration of 1.5h, a crystallization temperature of 970 oC, a nucleation temperature of 830 oC, and a nucleation duration of 1.0 h. Theperformances analyses reveals that the α-cordierite glass-ceramics based on the optimized parameters exhibits high densityand Vickers hardness, low dielectric loss and water absorption, and strong chemical resistance.
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