Structural and magnetic properties of steel slag based glass–ceramics
ADVANCES IN APPLIED CERAMICS(2015)
摘要
Crystallisation of magnetite in multicomponent glass melts was investigated. Structural features and magnetic properties were tested using X-ray diffraction, scanning electron microscope techniques, vibrating sample magnetometer and Mossbauer spectroscopy at room temperature. The results show that the magnetite phase was detected in the glass-ceramic samples after heat treatment at higher crystallisation temperature (over 900 degrees C). Fe2+ and Fe3+ ions contribute to the formation of magnetite crystal. Various crystal morphologies were observed. Isomer shift values suggest that Fe3+ and Fe2+ are in tetrahedral and octahedral coordination respectively. The saturation magnetisation tends to increase with the crystallisation temperature.
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关键词
Molten steel slag,Magnetic class ceramic,Magnetite crystallisation,Resource utilisation
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