Energetics of cubic Si3N4

Yahong Zhang, Alexandra Navrotsky, Toshimori Sekine

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

High-temperature oxide melt drop solution calorimetry was used to study the energetics of formation of cubic silicon nitride prepared at high pressure. The standard enthalpy of formation of c-Si3N4 is -776.3 ± 9.5 kJ/mol. The calorimetric measurement of Si3N4 in 3Na2O·4MoO3 solvent was validated by comparing the enthalpy of formation for β-Si3N4 with previous work using alkali borate solvent. The enthalpy of transformation from β- to c-Si3N4 is 80.2 ± 9.6 kJ/mol. This value appears consistent with the observed synthesis conditions, which do not represent reversed equilibrium reactions.

Original languageEnglish (US)
Pages (from-to)41-44
Number of pages4
JournalJournal of Materials Research
Volume21
Issue number1
DOIs
StatePublished - Jan 2006
Externally publishedYes

ASJC Scopus subject areas

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

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