Ceramics-Silikáty 55, (3) 246 - 250 (2011) |
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PREPARATION AND CHARACTERIZATION OF LIGHTWEIGHT MULLITE-SILICA RICH GLASS AGGREGATES
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Li Yuanyuan, Li Nan, Yan Wen,
Liu Guangping
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The Key State Laboratory Breeding Base of Refractories and Ceramics,
Wuhan University of Science and Technology, Qingshan District, Wuhan, China, 430081
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Keywords: Lightweight, Mullite, Silica rich glass, Viscosity, Composition
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Phase compositions, microstructures and properties of four lightweight mullite-silica rich glass aggregates with high
strength were investigated by X-ray diffractometry (XRD), scanning electron microscopy (SEM), and FactSage6.2 software.
It was found that the lightweight aggregates with higher Al₂O₃ content had higher mullite content, porosity and larger mullite
crystallites, but lower content and viscosity of melt at elevated temperature. Most of Fe₂O₃ and TiO₂ were incorporated in
mullite and most of K₂O and Na₂O were in glass to reduce viscosity of melt at elevated temperature. |
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