Energetics of oxidation of RE-Si-Al-O-N glasses

Yahong Zhang, Alexandra Navrotsky, Dirk Matusch, Hans Jürgen Seifert

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Enthalpies of drop solution in molten 52 wt.% LiBO2-48 wt.% NaBO2 at 1078 K were measured for RE1.1Si1.7Al0.6O6-1.5xNx (x = 0, 0.2, 0.4, 0.6, 0.8) glasses for RE = Nd, Gd, Dy, Er, and Y. Linear relations between enthalpies of formation from elements and nitrogen content indicate that, within the experimental composition range, sites occupied by nitrogen ions are approximately equivalent in energy for a given substitutional series. The energetics of different rare-earth SiAlON glasses appears to be dominated by differences in the acid/base character of the cations. The onset glass-transition temperature increases linearly with increasing nitrogen content for the same rare earth and with decreasing rare-earth ionic radius for the same nitrogen content.

Original languageEnglish (US)
Pages (from-to)1607-1613
Number of pages7
JournalJournal of Materials Research
Volume18
Issue number7
DOIs
StatePublished - Jul 2003
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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