Thermochemistry of a new class of materials containing dinitrogen pairs in an oxide matrix

Franck Tessier, Laurent Le Gendre, François Cheviré, Roger Marchand, Alexandra Navrotsky

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

A series of N 2-containing perovskite phases was prepared in the La-(Ba)-Ti-O system in order to study the dinitrogen retention phenomenon from a thermochemical viewpoint. High-temperature oxide melt solution calorimetry was undertaken to determine the energetics of the corresponding starting oxynitrides, intermediate phases, and oxides. Calorimetric results show that nitrogen is weakly bound within the oxide matrix and most of the enthalpy of oxidation of the intermediate phase is devoted to its structure change between the starting perovskite structure and the formation of a layered-perovskite La 2Ti 2O 7 oxide.

Original languageEnglish (US)
Pages (from-to)3570-3574
Number of pages5
JournalChemistry of Materials
Volume17
Issue number13
DOIs
StatePublished - Jun 28 2005
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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