A Study on the Synthesis of Alkoxides and Sialon

알콕사이드와 사이알론 합성에 관한 연구

  • Ho Ha (Department of Chemical Engineering, Inha University) ;
  • Heecheol Lee (Department of Chemical Engineering, Inha University)
  • 하호 (인하대학교 화학공학과) ;
  • 이희철 (인하대학교 화학공학과)
  • Published : 1988.06.20


Fine powders of amorphous $Al_2O_3,\;SiO_2,\;Al_2O_3-SiO_2$ system were prepared by hydrolysis of solutions containing alkoxides, aluminium tri-isopropoxide and silicon tetra-ethoxide. High purity ultrafine ${\beta}-sialon$ powders were prepared by the carbothermal reduction-nitridation of amorphous $Al_2O_3-SiO_2$ powders mixed with carbon black as a reducing agent. In the hydrolysis step the effect of the factors such as pH, reaction temperature and amount of water on the conversion rate of alkoxides to oxides was investigated. In the carbothermal reduction-nitridation the reaction path was assumed by the analysis of intermediates formed in the process of ${\beta}-sialon$ synthesis and the reaction kinetics of ${\beta}-sialon$ formation was considered.



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