Preparation of faceted TaN grains by heating Ta-containing oxides in BN crucible with Na

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Abstract

Single-crystal grains of TaN were synthesized by heating Ta2O5, FeTa2O6, or FeTaO4 in a BN crucible together with Na metal in an Ar atmosphere at 1100 °C. The BN crucible acted a solid source of nitrogen. Aggregates of columnar ε-TaN single crystals 10–150 μm in size were formed on the inner wall of the BN crucible when either Ta2O5 or FeTa2O6 was used. On the other hand, platelet-like single crystals of θ-TaN 1–50 μm in size were obtained from FeTaO4. The results of wavelength-dispersive X-ray spectrometry indicated that the compositions of the ε-TaN and θ-TaN crystals were close to the stoichiometric ideal.

Original languageEnglish
Pages (from-to)10817-10820
Number of pages4
JournalCeramics International
Volume48
Issue number8
DOIs
Publication statusPublished - 2022 Apr 15

Keywords

  • Nitrides
  • Powders: chemical preparation
  • Solid nitrogen source

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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