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Journal of Materials Science

, Volume 32, Issue 15, pp 3933–3938 | Cite as

Synthesis of ultrafine titanium diboride particles by rapid carbothermal reduction in a particulate transport reactor

  • Takeyasu Saito
  • Tomoyuki Fukuda
  • Hideaki Maeda
  • Katsuki Kusakabe
  • Shigeharu Morooka
Article

Abstract

Ultrafine TiB2 powders were synthesized by rapid carbothermal reduction in a vertical tubular reactor through which the particles fell freely. The starting materials were TiO2, H3BO3 and cornstarch, which were mixed and calcined at 400°C for 1 h. The calcined precursor was milled, sieved and then fed into the top of the reactor. The reduction was carried out between 1786–1791°C in a downward flow of argon. Product particles were recovered at the bottom of the reactor. When the precursor molar composition ratio was TiO2 : B2O3 : C=1 : 2 : 5.5, the carbon content in the product was 5 wt% and the crystallite size was 80 nm. The carbon content in the product was reduced to 2.9 wt% by a heat treatment in an H2 atmosphere for 9 h.

Keywords

Carbon Content Cornstarch Product Particle Boron Carbide Carbothermal Reduction 

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Copyright information

© Chapman and Hall 1997

Authors and Affiliations

  • Takeyasu Saito
    • 1
  • Tomoyuki Fukuda
    • 1
  • Hideaki Maeda
    • 1
  • Katsuki Kusakabe
    • 1
  • Shigeharu Morooka
    • 1
  1. 1.Department of Chemical Science and TechnologyKyushu UniversityHigashi-ku FukuokaJapan

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