Formation of needle-like titanium oxynitride particles through nitridation of hydrated titanates

Hajime Kiyono, Tomoki Tsumura, Tateki Kiyo, Masahiro Toyoda, Shiro Shimada

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The process of nitridation of hydrated titanate wires was examined by thermal gravimetric (TG) analysis in an NH3/Ar (50/50 vol.%) gas mixture, X-ray diffraction (XRD) measurement, field emission scanning electron microscope (FE-SEM) and transmission electron microscope (TEM) observations and X-ray photoelectron spectroscopic (XPS) analysis. The nitridation of the hydrated titanate nanowires was accompanied by a two-stage weight loss. In the first stage, occurring in the temperature range of 50-400 °C, the hydrated titanate wires changed to anatase-type TiO2 nanoparticles with the releasing of H2O molecules. In the second stage, occurring in the temperature range of 700-1000 °C, the TiO2 nanoparticles were converted to rock-salt-type titanium oxynitride (TiNxOy) nanoparticles. Subsequently, the TiNxOy nanoparticles were sintered each other at around 1000 °C. Under a gas flow of 100% NH 3, the hydrated titanate wires were completely changed to TiN xOy particles at a temperature greater than 950 °C, which was maintained for 2 h. It is possible to fabricate needle-like TiN xOy particles by selecting thick hydrated titanate wires as the starting materials.

Original languageEnglish
Pages (from-to)1813-1817
Number of pages5
JournalCeramics International
Volume37
Issue number6
DOIs
Publication statusPublished - 2011 Aug
Externally publishedYes

Fingerprint

Nitridation
Titanium
Needles
Wire
Nanoparticles
Electron microscopes
Spectroscopic analysis
Gravimetric analysis
Photoelectrons
Gas mixtures
Field emission
Titanium dioxide
Temperature
Nanowires
Flow of gases
Salts
Rocks
Scanning
X ray diffraction
X rays

Keywords

  • Hydrated titanate
  • Needle-like particles
  • Nitridation
  • Titanium oxynitride

ASJC Scopus subject areas

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

Cite this

Formation of needle-like titanium oxynitride particles through nitridation of hydrated titanates. / Kiyono, Hajime; Tsumura, Tomoki; Kiyo, Tateki; Toyoda, Masahiro; Shimada, Shiro.

In: Ceramics International, Vol. 37, No. 6, 08.2011, p. 1813-1817.

Research output: Contribution to journalArticle

Kiyono, Hajime ; Tsumura, Tomoki ; Kiyo, Tateki ; Toyoda, Masahiro ; Shimada, Shiro. / Formation of needle-like titanium oxynitride particles through nitridation of hydrated titanates. In: Ceramics International. 2011 ; Vol. 37, No. 6. pp. 1813-1817.
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