Articles
  • A preparation and performance study of glass-ceramic glazes derived from blast furnace slag and fly ash
  • Hong-xia Lua,*, Man Hea, Yuan-yuan Liua, Jing-fei Guoa, Li-wei Zhanga,b, De-liang Chena, Hai-long Wanga, Hong-liang Xua and Rui Zhanga,c
  • a School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450002, China b Xinxiang University, Xinxiang 453003, China c Zhengzhou Institute of Aeronautical Industry Management, Zhengzhou 450005, China
Abstract
Glass-ceramic glazes have been prepared successfully via crystallization from blast-furnace slag (BFS), fly ash (FA) fluxed with potash feldspar and borax. The crystalline behavior of glass-ceramic glazes was investigated using differential thermal analysis and thermogravimetric analysis (DTA/TG), X-ray diffraction (XRD) and scanning electron microscopy (SEM). Results revealed that the major crystalline phases are anorthite (CaAl2Si2O8) and akermanite (Ca2MgSi2O7) and crystalline phases disperse well in glassy phases with a uniform size of 1 μm. Glass-ceramic glazes possess low density, low water absorption, perfect stain resistance, acid resistance and alkali resistance. The thermal expansion coefficient of glass-ceramic glazes is steady up to 800 oC with an average value of 7.2 × 10−6 /K. Final results suggest that BFS and FA have potential to be vitrified into economically and environmentally low-cost glass-ceramic glaze materials

Keywords: Blast-furnace slag (BFS), Fly ash (FA), Glass-ceramic glazes, Anorthite, Akermanite

This Article

  • 2011; 12(5): 588-591

    Published on Oct 31, 2011

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