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Reactions in the formation of Na3Zr2Si2PO12

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Abstract

Nasicon ceramics of formula Na3Zr2Si2PO12 were prepared from two systems, namely NH4H2PO4-Na2CO3-SiO2-ZrO2 and Na3PO4-SiO2-ZrO2. The partial reactions and sequence of reactions was studied using differential thermal analysis and X-ray diffraction analysis. Kinetic restraints to completeness of reaction are indicated and sodium oxide volatilization is shown to occur. The rate-determining partial reaction involves zirconia and a sodium phosphosilicate intermediate.

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Authors and Affiliations

  1. National Institute for Materials Research, Council for Scientific and Industrial Research, Pretoria, Republic of South Africa

    V. A. Nicholas, A. M. Heyns, A. I. Kingon & J. B. Clark

  2. Department of Chemistry, University of Pretoria, Republic of South Africa

    A. M. Heyns

Authors
  1. V. A. Nicholas
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  2. A. M. Heyns
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  3. A. I. Kingon
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  4. J. B. Clark
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Nicholas, V.A., Heyns, A.M., Kingon, A.I. et al. Reactions in the formation of Na3Zr2Si2PO12 . J Mater Sci 21, 1967–1973 (1986). https://doi.org/10.1007/BF00547935

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  • DOI: https://doi.org/10.1007/BF00547935

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