INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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Preparation and Properties of Black Glass-Ceramics by Reaction Crystallization with Waste Glass |
SI Wei
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School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, China |
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Abstract Black glass-ceramics were prepared by reactive crystallization method at 900 ℃ using waste glass powder and self-made black pigment as raw materials, fluoromica, gehlenite and enstatite as reaction crystallization promoters. The crystal structure and morphology of the samples were characterized by X-ray diffraction and scanning electron microscopy, and their physical and mechanical properties were determined. The results show that the phase structure of black glass-ceramics has not changed after adding different crystallization promoters, but the bonding strength between the precipitated crystals and glass is different, resulting in different physical and mechanical properties of the samples. Without adding crystallization promoter and adding gehlenite black glass-ceramics, it can meet the requirements of building materials: the density is more than 2.00 g/cm3, the water absorption is less than 0.5% and the modulus of rupture is more than 35.0 MPa. Among them, the black glass-ceramics with adding gehlenite shows the best properties: the density is 2.46 g/cm3, the water absorption is 0.003%, the modulus of rupture is 49.0 MPa, and it has good acid and alkali resistance.
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Published: 24 July 2020
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Fund:This work was financially supported by the Liaoning Provincial Natural Science Foundation of China (20180550569) and Scientific Research Fund of Liaoning Provincial Education Department of China (JDL2019024) and the Program of Science-Technology Star for Young Scholars by the Dalian Municipality of China (2016RQ051). |
About author:: Wei Siis an associate professor and master supervisor in Dalian Jiaotong University. She mainly engages in the preparation and performance research of glass ceramics and nanomaterials. In 2015, she was awared as Dalian Youth Technology Talent. She has presided over and participated in more than 10 projects with some belonging to National Natural Science Foundation of China and the National Key Research and Development Project. She has published more than 40 academic papers as the first author, and obtained 3 national invention patents. |
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