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Densification and crystallisation of celsian glass derived from alkoxide gel

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Abstract

High density (98% of theoretical) was achieved at 900°C for an all-alkoxide derived bulk celsian gel prior to crystallisation. TEM indicated that crystallisation was dominated by volume nucleation and growth of hexagonal disc shaped hexacelsian. Kinetic studies using SEM indicate a maximum nucleation rate at 980°C and an activation energy for crystal growth of 566 KJ/mol. The high rates of densification and of nucleation are attributed to the high OH content in the gel-derived glass.

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Authors and Affiliations

  1. Department of Engineering Materials, University of Sheffield, Sir Robert Hadfield Building, 4DU, Sheffield S1, UK

    M. Chen, P. F. James & W. E. Lee

Authors
  1. M. Chen
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  2. P. F. James
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  3. W. E. Lee
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Chen, M., James, P.F. & Lee, W.E. Densification and crystallisation of celsian glass derived from alkoxide gel. J Sol-Gel Sci Technol 2, 233–237 (1994). https://doi.org/10.1007/BF00486247

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