Borate Glasses pp 539-548 | Cite as

Properties of Silica Glasses Containing Small Amounts of B2O3

  • William C. LaCourse
  • Harrie J. Stevens
Part of the Materials Science Research book series (MSR, volume 12)


In the classic mixed alkali effect a maximum occurs in the electrical resistivity and activation energy for conductivity (∆EA) when one progressively substitutes one alkali (R1) with another (R2). This effect is illustrated in Figure 1. LaCourse, 1 using the electrodynamic model of Hendrickson and Bray,2, 3 has predicted that in certain glasses containing a single alkali ion type, but with two dissimilar bonding sites for the alkali ion, an effect similar to the mixed alkali effect may be observed (Figure 2). Taylor and Rindone4 have postulated a similar effect to account for effects of water on the internal friction in glasses.


Activation Energy Vibrational Frequency Silica Glass Bonding Site Mixed Alkali 
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  1. 1.
    W. C. LaCourse, J. Non-Cryst. Solids 21 (1976) 431.CrossRefGoogle Scholar
  2. 2.
    J. R. Hendrickson and P. J. Bray, Phys. Chem. Glasses, 13 (1972) 45.Google Scholar
  3. 3.
    J. R. Hendrickson and P. J. Bray, Phys. Chem. Glasses, 13 (1972) 107.Google Scholar
  4. 4.
    T. D. Taylor and G. E. Rindone, J. Non-Cryst. Solids, 14 (1974) 157.CrossRefGoogle Scholar
  5. 5.
    M. E. Milberg, J. G. O’Keefe, R. A. Verhelst and H. O. Hooper, Phys. Chem. Glasses, 13 (1972) 79.Google Scholar
  6. 6.
    P. J. Bray, this volume.Google Scholar
  7. 7.
    J. Isard, J. Non-Cryst. Solids, 1 (1969) 235.CrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1978

Authors and Affiliations

  • William C. LaCourse
    • 1
  • Harrie J. Stevens
    • 1
  1. 1.New York State College of CeramicsAlfredUSA

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