Thermochemistry of Charge‐Coupled Substitutions in Silicate Glasses: The Systems Ml/nn+ AlO2‐SiO2 (M = Li, Na, K, Rb, Cs, Mg, Ca, Sr, Ba, Pb)

BIMALENDU N. ROY, ALEXANDRA NAVROTSKY

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116 Scopus citations

Abstract

Enthalpies of solution of framework aluminosilicate glasses xMl/nn+ AlO2‐(1‐x)SiO2 (M = Cs, Rb, K, Na, Li, Ba, Pb, Sr, Ca, Mg) in molten 2PbO.B2O3 near 973 K were measured. The sequence above represents increasing ability of the nonframework cation M to bond to the bridging oxygen. In that sequence, the enthalpy of the substitution Si4+→+ Al3++ 1/nMn+ in the glass becomes less exothermic, the enthalpy of vitrification increases, and the tendency toward glass‐glass immiscibility becomes more pronounced. These parameters correlate smoothly with the ionic potential, z/r, of the substituting cation.

Original languageEnglish (US)
Pages (from-to)606-610
Number of pages5
JournalJournal of the American Ceramic Society
Volume67
Issue number9
DOIs
StatePublished - Sep 1984

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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