A new route to synthesize β-Si6-zAlzOzN8-z powders

Kazuhiko Aoyagi, Takehito Hiraki, Ramasamy Sivakumar, Toshiyuki Watanabe, Tomohiro Akiyama

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24 Citations (Scopus)


β-Sialons (Si6-zAlzOzN8-z) of z values ranging between 1 and 4 were tried for combustion synthesis using mechanically activated powders of Si, Al and Al2O3 with desired mixing ratio in a pressurized nitrogen atmosphere of 1 MPa. The starting materials were milled to 18 min using a planetary ball mill for mechanical activation (MA). Unsuccessful propagations of z values 1 and 2 were explained in terms of amount of Al present in the raw material. Waste Si, of 94.8 mass% in purity, obtained from semiconductor industry was also introduced as a raw material to replace commercially available Si for the combustion synthesis.

Original languageEnglish
Pages (from-to)236-240
Number of pages5
JournalJournal of Alloys and Compounds
Issue number1-2
Publication statusPublished - 2007 Aug 30


  • Ceramics
  • Gas-solid reaction
  • SEM
  • X-ray diffraction


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