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A study of the crystallization process of Na1.6Zn0.8Si1.2O4 glass and the ionic conductivity properties of partially crystallized samples

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Abstract

The crystallization process of Na1.6Zn0.8Si1.2O4 glass was studied by means of differential scanning calorimetry, X-ray powder diffraction and the platinum/carbon replication technique. Partially crystallized samples were made by rapidly cooling samples from elevated temperatures using the DSC apparatus, and the ionic conductivity of the materials was determined by means of impedance measurements conducted at lower temperatures where the crystallization rate was negligible. The glass was found to crystallize at 830 K by precipitation and three-dimensional grain-growth of a crystobalite-type phase with the same composition as the glass. The overall activation energy for the crystallization process was determined from isothermal DSC measurements to be 340 kJ mol−1. The bulk ionic conductivity for partially crystallized samples increases smoothly from 9.3 x 10−5(Ω cm)−1 at 600 K for the glass to 2.4 x 10−3(Ω cm)−1 for the crystallized material.

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Authors and Affiliations

  1. Department of Inorganic Chemistry, Arrhenius Laboratory, University of Stockholm, S-106 91, Stockholm, Sweden

    Jekabs Grins

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  1. Jekabs Grins
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Grins, J. A study of the crystallization process of Na1.6Zn0.8Si1.2O4 glass and the ionic conductivity properties of partially crystallized samples. J Mater Sci 21, 887–894 (1986). https://doi.org/10.1007/BF01117369

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  • DOI: https://doi.org/10.1007/BF01117369

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