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      https://www.ias.ac.in/article/fulltext/boms/021/03/0185-0187

    • Keywords

       

      Mullite; mechanochemistry; NMR

    • Abstract

       

      Aluminosilicate (mullite) precursor was prepared by mechanochemical treatment of gibbsite and fumed silica mixtures. The effect of grinding on its structure and thermal behaviour was examined by27Al and29Si MAS NMR, XRD, DTA-TG and FTIR. Thermal treatment of this precursor led to the crystallization of mullite at about 1200°C via a spinel-phase.27Al and29Si MAS NMR spectroscopies show lowering of mullitization temperature, which is associated with increased homogeneity of the precursor. Mechanochemical treatment of gibbsite and fumed silica mixtures resulted in the formation of a more homogeneous aluminosilicate precursor.

    • Author Affiliations

       

      J Temuujin1 2 T S Jadambaa1 2 K Okada1 3 K J D Mackenzie1 4

      1. Institute of Chemistry and Chemical Technology, Mongolian Academy of Sciences, Ulaanbaatar - 51, Mongolia
      2. Department of Inorganic Materials, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo - 152, Japan
      3. Department of Chemical Technology, Mongolian Technical University, Ulaanbaatar - 46, Mongolia
      4. New Zealand Institute for Industrial Research and Development, P.O. Box 31-310, Lower Hutt, New Zealand
    • Dates

       
  • Bulletin of Materials Science | News

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