Preparation of titanium nitride: Microwave-induced carbothermal reaction of titanium dioxide

Ramesh D. Peelamedu, Mary Fleming, Dinesh K. Agrawal, Rustum Roy

Research output: Contribution to journalArticlepeer-review

53 Scopus citations

Abstract

Carbothermal reduction and nitridation of TiO2 was performed in a 2 kW, 2.45 GHz microwave furnace. Carbon, generally added for the removal of oxygen from TiO2 lattice also served as the low-temperature susceptor in these experiments. At temperatures >1200°C, the mixtures started reacting vigorously (self-burn), which was never observed with the respective pure compounds. In the self-burning state, the minimum duration required for complete titanium nitride transformation was ∼20 min with stoichiometric amounts of carbon. With excess C, the transformation duration dropped to just 1 min. CO removal and subsequent Ni fixation occur more directly in microwave-induced reactions than in conventional nitridation procedures. Intermediate formation of successive Magneli phases (Ti2nO2n-1) was not found in the microwave-induced reactions. The combination of microwave processing and combustion makes this route of economical interest.

Original languageEnglish (US)
Pages (from-to)117-122
Number of pages6
JournalJournal of the American Ceramic Society
Volume85
Issue number1
DOIs
StatePublished - Jan 2002

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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