Preparation of ZrB 2 and HfB 2 by metallothermic reduction of ZrO 2, ZrSiO 4, and HfO 2

Takahiro Ohkubo, Tetsuo Ono, Katsuhiro Nishiyama, Susumu Niwa, Hideki Sakai, Masumi Koishi, Masahiko Abe

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


ZrB 2 and HfB 2 were prepared by metallothermic reduction (MTR) of ZrO 2, ZrSiO 4, and HfO 2 with Mg or Mg and MgO mixtures. We understood that the theory of function-building fine particle preparation was able to be applied to synthesize nano-atomized fine particles of ZrB 2. ZrB 2 can also be obtained directly from mixture of ZrSiO 4, B 2O 3, and Mg by MTR method. This sample has no borides such as silicon boride except for ZrB 2. Therefore, this result shows the possibility to obtain ZrB 2 easily from natural source. In addition, HfB 2 can also be synthesized by MTR method using HfO 2 which was calcined over 750°C.

Original languageEnglish
Pages (from-to)664-669
Number of pages6
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Issue number9
Publication statusPublished - Sep 2005
Externally publishedYes


  • Function-building fine particle preparation
  • Hafnium diboride
  • Metallothermic reduction
  • Zirconium diboride

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry


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