Rapid reduction of titanium dioxide nano-particles by reduction with a calcium reductant

Tatsuya Kikuchi, Masumi Yoshida, Shiki Matsuura, Shungo Natsui, Etsuji Tsuji, Hiroki Habazaki, Ryosuke O. Suzuki

研究成果: Article査読

20 被引用数 (Scopus)


Micro-, submicron-, and nano-scale titanium dioxide particles were reduced by reduction with a metallic calcium reductant in calcium chloride molten salt at 1173 K, and the reduction mechanism of the oxides by the calcium reductant was explored. These oxide particles, metallic calcium as a reducing agent, and calcium chloride as a molten salt were placed in a titanium crucible and heated under an argon atmosphere. Titanium dioxide was reduced to metallic titanium through a calcium titanate and lower titanium oxide, and the materials were sintered together to form a micro-porous titanium structure in molten salt at high temperature. The reduction rate of titanium dioxide was observed to increase with decreasing particle size; accordingly, the residual oxygen content in the reduced titanium decreases. The obtained micro-porous titanium appeared dark gray in color because of its low surface reflection. Micro-porous metallic titanium with a low oxygen content (0.42 wt%) and a large surface area (1.794 m2 g-1) can be successfully obtained by reduction under optimal conditions.

ジャーナルJournal of Physics and Chemistry of Solids
出版ステータスPublished - 2014 9月

ASJC Scopus subject areas

  • 化学 (全般)
  • 材料科学(全般)
  • 凝縮系物理学


「Rapid reduction of titanium dioxide nano-particles by reduction with a calcium reductant」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。