Study on dry grinding of gibbsite (hydrargillite)

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Author(s)

    • SAITO Fumio
    • Institute for Advanced Materials Processing (AMP), Tohoku University
    • WASEDA Yoshio
    • Institute for Advanced Materials Processing (AMP), Tohoku University

Abstract

The structural change of gibbsite induced by dry grinding has been investigated by means of BET analysis, SEM observation, XRD, MAS/NMR spectroscopy and TG-DTA. The crystalline structure of gibbsite changes into a disordered one with the progress of grinding and subsequent RDF analysis of ground gibbsite samples suggests the structural variation in the local atomic arrangement around aluminum. MAS/NMR measurement also supports this change and indicates the formation of a tetra- and penta-coordinated aluminum at the expense of parent octahedral ones. Low temperature dehydroxylation reaction and new exothermic peaks at about 800 and 1000°C of ground samples were detected in TG-DTA.

Journal

  • Mineralogical Journal

    Mineralogical Journal 17(3), 101-110, 1994-07-01

    Japan Association of Mineralogical Sciences

References:  11

Cited by:  5

Codes

  • NII Article ID (NAID)
    10008770980
  • NII NACSIS-CAT ID (NCID)
    AA00739590
  • Text Lang
    ENG
  • Article Type
    Journal Article
  • ISSN
    05442540
  • Data Source
    CJP  CJPref  J-STAGE 
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