Thermochemical studies of nitrides and oxynitrides by oxidative oxide melt calorimetry

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27 Scopus citations

Abstract

High temperature oxidative solution calorimetry is a versatile technique for obtaining enthalpies of formation of nitrides and oxynitrides. In this method, the solid phase is dissolved in a molten oxide solvent (sodium molybdate or an alkali borate) while oxygen gas is bubbled through the melt. The nitrogen is evolved as N2 and the final state is a dilute solution of dissolved oxides in the solvent. A thermochemical cycle may then be written to obtain the enthalpy of formation. The energetics of silicon nitride and of binary and ternary nitrides are discussed to illustrate the methodology.

Original languageEnglish (US)
Pages (from-to)300-306
Number of pages7
JournalJournal of Alloys and Compounds
Volume321
Issue number2
DOIs
StatePublished - Jun 14 2001
Externally publishedYes

Keywords

  • Calorimetry
  • Oxynitrides
  • Thermochemistry

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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