Preparation of hard nanoceramics of borides and functionalization of titania by metallothermic reduction method

Takahiro Ohkubo, Hideki Sakai, Masahiko Abe, Katsuhiro Nishiyama

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Fine particles of TiB2, ZrB2, and HfB2 were prepared by metallothermic reduction (MTR) of their oxides with Mg. As a result, we found that theory of function-building fine particle preparation was able to be applied to synthesize nano-atomized fine particles of borides. ZrB2 can also be obtained directly from mixture of ZrSiO4, B2O3, and Mg by MTR method. This sample has no borides such as silicon boride except for ZrB2. Therefore, this result shows the possibility to obtain ZrB2 easily from natural source. On the other hand, B doped TiO2 samples were prepared by the calcination of TiB2 in the air condition and MTR method. As a result, we could effectively dope B atoms to TiO2 samples by this method. These samples also show the photocatalytic activity for the oxidation of 2-propanol even under the visible-light irradiation.

Original languageEnglish
Pages (from-to)251-259
Number of pages9
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume54
Issue number4
DOIs
Publication statusPublished - Apr 2007
Externally publishedYes

    Fingerprint

Keywords

  • Function-building fine particle preparation
  • Metallothermic reduction
  • Photocatalyst

ASJC Scopus subject areas

  • Mechanical Engineering
  • Metals and Alloys

Cite this