A Study on Synthesis of High Purity $\beta$-SiC Fine Particle from Ethylsilicate(I) -Reaction Conditon, Yeild and Properties of $\beta$-SiC-

Ethyl Silicate를 고순도 $\beta$-SiC미분말 합성에 관한 연구(I) 반응조건과 $\beta$-SiC의 생성율 및 특성

  • 최용식 (국립공업시험원 도자기시험소) ;
  • 박금철 (한양대학교 공과대학 무기재료공학과)
  • Published : 1988.05.01


In order to obtain the high purity $\beta$-SiC powder that possesses the excellent sinterability and is close to the spherical shape, the carbon black was mixed into the composition of Si(OC2H5)4-H2O-NH3-C2H5OH which the monodispersed spherical fine particles is formed the hydrolysis of Ethylsilicate and the mixture was carbonized under an argon atmosphere. Particle shpae, size and the yield of $\beta$-SiC powder were investigated according to the molar ratio of carbon/alkoxide and variations of reaction temperature and reaction time. The results of this study are as follow ; 1) The yield of $\beta$-SiC gained from the reaction for one hour at 150$0^{\circ}C$ almost got near 100% and the particle size of $\beta$-SiC from the reaction for 15 hrs at 150$0^{\circ}C$ was 0.2${\mu}{\textrm}{m}$ on the average and close to the spherical shape agglomerate state. 2) When the molar ratio carbon/alkoxide is over 3.1 and the reaction occurs at 145$0^{\circ}C$ for 5hrs, the carbon content has not an effect on the kind of crystal of product.



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