Influence of Crucible Material on the Microstructure and Properties of Iron Rich Glass-Ceramics

邓磊波¹，张雪峰²，LI Baowei¹，JIA Xiaolin³，ZHANG Mingxing¹，OUYANG Shunli¹

1. Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology2. School of Mathematics, Physics and Biological Engineering, Inner Mongolia University of Science &Technology3. School of Material Science and Engineering, Zhengzhou University

摘 要：Slag glass melting is usually performed on a laboratory scale in crucibles, which are economically viable tools for the production of slag glass-ceramics. In this work, quaternary CaO-Al₂O₃-MgO-SiO₂（CAMS） glass-ceramics were prepared by melting the tailing of Bayan Obo mine tailing, blast furnace slag, and fly ash in alumina and graphite crucibles. The effect of the crucible material on the microstructure and properties of the glass-ceramics was investigated using differential scanning calorimetry, X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy and inductively coupled plasma atomic emission spectroscopy. Results indicated that the contents of Al₂O₃ and Fe₂O₃ in the initial glass were significantly changed by the corrosion of the alumina crucibles during the glass melting process and by the reducing action of the graphite crucibles. The main crystal phases of glass-ceramics melted in alumina crucibles and graphite crucibles were Ca（Mg, Fe, Al）（Si, Al）₂O₆, coesite and Ca（Mg, Al）（Si, Al）₂O₆, respectively. According to these findings, we conclude that the microstructure and properties of the glass-ceramics are affected by the crucibles.

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