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

Abstract

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.

Keywords

References

  1. Science of Ceramics W. Boker;H. Hausner;K. T. De Vries(ed.)
  2. J. Appl. Physics v.19 Statistical Factors Affecting the Intensity of X-ray Diffracted by Crystalline Powders H. P. Klug;L. Alezander;E. Kummer
  3. Yogyo-Kyokai-Shi v.88 no.10 Energy Stred in a Gran Boundary Formed by a Rotation Along a Hexagonal Lattice Plane in SiC Crystals Y. Inomate;Y. Uemura;Z. Inoue;H. Tanaka
  4. Mass Transport Phenomena in Ceramics S. Prochazka;A. R. Copper(ed.);A. H. Heer(ed.)
  5. X-ray Diffraction Procedures, (2nd Ed.) H. P. Klug;L. E. Alexander
  6. J. Mater. Sci v.16 A Grain Boundary of α-SiC by Crystals Y. Uemura;Y. Inomata;Z. Inoue
  7. 한국요업학회지 v.24 no.5 Ethy1 Silicate의 가수분해에 의한 단분산구성 SiO₂미립자의 합성 (Ⅰ) 오일환;박금철
  8. J. Am. Cera. Soci. v.63 Self-diffusion of Carbon-14 in High Purity and N-doped α-SiC Single Crystal J. D. Hong;R. F. Davis
  9. Yogyo-Kyokai-Shi v.87 Sinterability of Submicron SiO Prepared from Siliconzation of Carbon Black und Presence of Al Addive T. Hase;H. Suzuki
  10. Anal Chem v.25 Direci Quantitative X-Ray Analysis by Diffraction- Absorption Technique Leroux;Jean;Lennox D. H.;Kay;Kingsley