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Issue 10, 2001
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Preparation of nano-sized TiN coated α-Si3N4 particles

Shuichi Kawano,a  Kenichi Tsukurimichi,a  Junichi Takahashia  and  Shiro Shimada*a 
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* Corresponding authors

a Graduate School of Engineering, Hokkaido University, Sapporo, Japan
E-mail: shimashi@eng.hokudai.ac.jp
Fax: +81. 11. 706. 6576
Tel: +81. 11. 706. 6576

Abstract

α-Si3N4 particles coated with 10 and 25 vol% nano-sized TiN were prepared by coating the surface of the Si3N4 particles with TiO2, followed by nitridation. Coating by TiO2 was accomplished by dispersing α-Si3N4 powders (0.16 and 1.6 g l−1) in a solution of TiCl4, urea and aqueous HCl, and heating at 105 °C for 130 and 190 min. The success of the coating procedure was confirmed by TEM observation with electron diffraction and EDX analysis. Zeta potential measurements suggest that the TiO2 coating on the surface of Si3N4 particles occurs at a pH between 3.7 and 4.3 by the attractive force of opposite charges. When the TiO2 on the surface of the Si3N4 is nitrided with NH3 gas at 1000 °C, it is completely changed to TiN of uniform particle size (20 nm).

Graphical abstract: Preparation of nano-sized TiN coated α-Si3N4 particles

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Publication details

The article was received on 27 Mar 2001, accepted on 15 Jun 2001 and first published on 06 Aug 2001


Article type: Paper
DOI: 10.1039/B102794H
Citation: J. Mater. Chem., 2001,11, 2625-2628
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    Preparation of nano-sized TiN coated α-Si3N4 particles

    S. Kawano, K. Tsukurimichi, J. Takahashi and S. Shimada, J. Mater. Chem., 2001, 11, 2625
    DOI: 10.1039/B102794H

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