Glass formation and transition temperatures in sodium and lithium borate and aluminoborate melts up to 72 mol.% alkali

S. W. Martin, C. A. Angell

Research output: Contribution to journalArticle

68 Scopus citations

Abstract

We report continuous glass formation and glass transition temperatures Tg for the pseudo-binary systems xM2O (1 - x) (0.87B2O30.13Al2O3) to x = 0.675 for M = Na and 0.575 for M = Li. A dependence of both Tg and glass-forming range on starting materials is found at high alkali contents, and attributed to retained CO2. Maxima in Tg for both binary and pseudo-binary systems are quantitatively described in terms of two effects: (i) creation of 4-coordinated borons (increasing Tg), and (ii) creation of non-bridging [BO3] oxygens (decreasing Tg. To first approximation we find the latter imparting a stronger effect on Tg.

Original languageEnglish (US)
Pages (from-to)429-442
Number of pages14
JournalJournal of Non-Crystalline Solids
Volume66
Issue number3
DOIs
StatePublished - Aug 2 1984
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

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