Influence of ammonia gas exposure on microstructure of nanocrystalline titanium nitride powder synthesized from titanium dioxide

Hanan Alhussain, Takuto Mise, Yasuyuki Matsuo, Hajime Kiyono, Kaoru Nishikiori, Takaya Akashi

Research output: Contribution to journalArticle

Abstract

In this study, we investigated the preparation conditions of titanium nitride (TiN) through nitridation of nano-sized titanium dioxide (TiO2) without particle agglomeration. Synthesis of nanocrystalline TiN powder was attempted via ammonia (NH3) nitridation of nanocrystalline TiO2 powder. The nitridation behavior was investigated using thermogravimetry (TG) in an NH3 atmosphere. Non-isothermal TG experiments showed that nitridation of the nanocrystalline TiO2 powder began at 3750°C. Two types of experiments were performed using isothermal TG. In the first experiment, an argon atmosphere was used while heating at 5 °C/min. On reaching the holding temperature (900 or 1,000°C), the atmosphere was changed to NH3/Ar (50/50 kPa). This atmosphere was used throughout the second experiment. The first experiment produced a nitride powder with severely agglomerated particles. In the second experiment, nano-sized powder particles with inhibited agglomeration were obtained, and long holding time of 6 h at 900 or 1,000°C was effective in obtaining the small nitrided particles.

Original languageEnglish
Pages (from-to)824-829
Number of pages6
JournalJournal of the Ceramic Society of Japan
Volume127
Issue number11
DOIs
Publication statusPublished - 2019 Jan 1

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Keywords

  • Agglomeration
  • Ammonia nitridation
  • Nanoparticle
  • TiN
  • TiO

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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