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Borate Glasses pp 567-575 | Cite as

Effect of Water Content on Density, Refractive Index, and Transformation Temperature of Alkali Borate Glasses

  • Helmut Franz
Part of the Materials Science Research book series (MSR, volume 12)

Abstract

The solubility of water vapor in boric oxide [1] and binary alkali borate melts [2] has been found to be proportional to the square root of the partial pressure PH2O, indicating that water vapor introduced at PH20< 1 atm is dissolved in the form of hydroxyl groups (−OH), in analogy to the incorporation of water in silicate melts [3–6]. Correlations between the bond state of dissolved hydroxyl groups and the structure of alkali borate [2] and alkali silicate [7] glasses have been derived from solubility data and infrared absorption spectra. The effect of water content on some properties of silicate glasses have been discussed previously [8]. This study will present experimental data on the effect of the hydroxyl concentration on density, refractive index, and transformation temperature of binary lithium, sodium, and potassium borate glasses containing 0 to 33 mole percent R20. The corresponding properties of water-free alkali borate glass systems have been extrapolated. Results are discussed in terms of a simplified structural model interpreting the effects of incorporated hydroxyl groups on structure sensitive properties of alkali borate glasses.

Keywords

Refractive Index Transformation Temperature Interstitial Space Borate Glass Infrared Absorption Spectrum 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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    H. Franz, Glastechn. Ber. 38 (1965), 54–59.Google Scholar
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    H. Franz, J. Amer. Ceram. Soc. 49 (1966), 473–477.CrossRefGoogle Scholar
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    H. Scholze, H. O. Mulfinger, and H. Franz, Advances in Glass Technology, Plenum Press, Inc., New York (1962), 230–248.Google Scholar
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    H. Franz and H. Scholze, Glastechn. Ber. 36 (1963), 347–356.Google Scholar
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    C. R. Kurkjian and L. E. Russell, J. Soc. Glass Technol. 42 (1958), 130–144T.Google Scholar
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    H. Franz and T. Kelen, Glastechn. Ber. 40 (1967), 141–148.Google Scholar
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    H. Scholze, H. Franz, and L. Merker, Glastechn. Ber. 32 (1959), 421–426.Google Scholar
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    D. L. Griscom, “Borate Glass Structure”, pp. 1–128, this volume.Google Scholar

Copyright information

© Plenum Press, New York 1978

Authors and Affiliations

  • Helmut Franz
    • 1
  1. 1.Glass Research CenterPPG INDUSTRIES, Inc.PittsburghUSA

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