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Microwave synthesis of nanocrystalline, a tailing-based glass-ceramic extraordinaire

： A comparison of tailing-based nanocrystalline glass-ceramics prepared by microwave and conventional heat treatment has been made to investigate the effect of slightly microstructure differences on the mechanical properties and thermal stability. Contrast conventional heat treatment, the flexural strength of the samples increased from 169 MPa to 219.9 MPa under the microwave radiation, and the temperature of the hemisphere-stage increased by 81 o C during the melting. The main factors affecting materials properties under microwave radiation are the increased Si-O stretching vibrations frequency and bond force, and the substitution effectively of Ce 3+ /Ce 4+ in the diopside during crystallization. Besides, the polymeric character of silicon-oxygen network can be reduced by microwave radiation to promote the nucleation. Microwave radiation is an energy-efficient technology for the preparation of rare earth tailing-based material.