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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.120  No.1400 (April) (2012)  >  pp.155-157

Journal of the Ceramic Society of Japan
<<Previous article Vol.120  No.1400 (April) (2012)   pp.155 - 157 Next article>>

Preparation of Ca-α SiAlON powder by reduction-nitridation in a gas mixture of C3H8 and NH3

Mikinori HOTTA1), Hideki KITA1), Tomohiro YAMAKAWA2), Junichi TATAMI2), Katsutoshi KOMEYA2) and Takeshi MEGURO2)
1) Advanced Manufacturing Research Institute, National Institute of Advanced Industrial Science and Technology (AIST)
2) Graduate School of Environment and Information Science, Yokohama National University


  Ca-α SiAlON powders were synthesized from a SiO2–Al2O3–CaCO3 powder mixture by reduction-nitridation with C3H8–NH3 gas. Ca-α SiAlON with small amounts of AlN and β-SiAlON phases was produced at 1450°C for 120 min. Angular particles and agglomerated and bonded particles with irregular shapes were formed. In the product prepared at 1450°C without any holding time, Si2N2O was detected as an intermediate phase, in addition to the Ca-α SiAlON, β-SiAlON and AlN phases. A large number of agglomerated and bonded particles were observed.


Keyword:
SiAlON, Powder, Reduction-nitridation, Gas, Morphology, Formation process

Received: December 13, 2011
Accepted: February 02, 2012 , Published online: March 28, 2012
Copyright (c) 2012 The Ceramic Society of Japan

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