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 language | English (US) |
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Pages (from-to) | 300-306 |
Number of pages | 7 |
Journal | Journal of Alloys and Compounds |
Volume | 321 |
Issue number | 2 |
DOIs | |
State | Published - Jun 14 2001 |
Externally published | Yes |
Keywords
- Calorimetry
- Oxynitrides
- Thermochemistry
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry