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Preparation of B2O3-P2O5-SiO2 coating films by the sol-gel method

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Abstract

ThexB2O3 · (20-x) P2O5 · 80SiO2 (in mol%) glass films withx=0, 10 and 20 have been prepared from metal alkoxides by carrying out the coating in a dry atmosphere. These coating films have shown a larger value of load at scratch and a smaller shrinkage during heat-treatment by replacing P2O5 in the films with B2O3. It has been found that B2O3 more effectively reduces the glass transition temperature of SiO2 glass than P2O5. The concentrations of sodium ions, which migrated from soda-lime-silica glass substrates during the film formation, were higher in phosphosilicate and borophosphosilicate films than in borosilicate and pure silica films. This finding should be ascribed to the gettering effects of phosphorus for sodium ions.

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Authors and Affiliations

  1. Tsukuba Research Laboratory, Nippon Sheet Glass Company Limited, 5-4 Tokodai, Tsukuba-Shi, 300-26, Ibaraki, Japan

    A. Matsuda

  2. Department of Applied Chemistry, University of Osaka Prefecture, Mozu-Umemachi, Sakai-Shi, 591, Osaka, Japan

    N. Tohge & T. Minami

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  1. A. Matsuda
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  2. N. Tohge
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  3. T. Minami
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Matsuda, A., Tohge, N. & Minami, T. Preparation of B2O3-P2O5-SiO2 coating films by the sol-gel method. J Mater Sci 27, 4189–4194 (1992). https://doi.org/10.1007/BF01105125

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  • DOI: https://doi.org/10.1007/BF01105125

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