The Microstructure Control of SiC Ceramics Containing Porcelain Scherben

자기파를 함유한 SiCwlf 세라믹스의 미세구조 제어

  • 이성희 (홍익대학교 무기재료공학과)
  • Published : 1995.05.01


The SiC-porcelain powder mixtures containing 51.9wt% SiC are produced as by-products from the surface abrasion process of porcelain cores. This raw powders were used as starting materials for the synthesis of SiC containing ceramics. The specimen, which was fired at 135$0^{\circ}C$ from raw powders, had SiC, $Al_{2}O_{3}$, , cristobalite, mullite as crystalline phases, and the fractured microstructure showed dispersed SiC crystalline particles almost wetted with glassy matrix and spherical pores. Although the oxidation of SiC containing powder compacts wetted with glassy matrix and spherical pores. Although the oxidation of SiC containing powder compacts started at the range of 600~80$0^{\circ}C$ form the analysis of weight gain, the presence of $SiO_{2}$ crystallien phase and cristobalite was confirmed at 100$0^{\circ}C$ by XRD analysis. Mullitization of specimens was accelerated by preheating before the final firing. The specimen sintered at 135$0^{\circ}C$ after 100$0^{\circ}C$ preheating consisted of SiC, cristobalite, mullite as crystalline phases, and revealed 2.24g/$cm^{3}$ bulk density, 11.73% water adsorption, porous microstructure with small amount of glassy phase. SiC contents of specimens, which was 51.9 wt% in the raw powders, reduced to 37~22 wt% after firing at 135$0^{\circ}C$ depending on the preheating condition.


SiC containing ceramics;By-product;Weight gain;Oxidation;SiC;$Al_{2}O_{3}$ mullite;Microstructure


  1. The Properties of Glass G.W. Morey
  2. High Temperature Oxide A.M. Alper
  3. J. Kor. Ceram. Soc. v.17 no.3 The Effects of Various Anti-Oxidation Additives in Silicon Carbide Refractory Saggers J.G. Lee
  4. Ceramics and Glasses of the Engineered Materials Handbook S.J. Schneider, Jr.(ed.)
  5. Phase Diagrams for Ceramists The American Ceramic Society. Inc.
  6. J. Am. Ceram. Soc. v.69 no.12 Effective Sintering Aids for Silicon Carbide Ceramics: Refractories of Silicon Carbide with Various Additives K. Negita
  7. J. Am. Ceram. Soc. v.43 no.4 Effect of Oxygen Partial Pressure on Oxidation of Silicon Carbides M.E. Wadsworth;I.B. Cutler
  8. Ber. Dt Keram. Ges v.55 no.10 Dissociation of Silicon Carbide in Silicate-Bonded Refractories E.H.P. Wecht
  9. J. Kor. Ceram. Soc. v.19 no.1 Study on the Development of SiC-containing Technical Porcelain Body J.H. Park;W.T. Bae;O.H. Kwon
  10. J. Kor. Ceram. Soc. v.18 no.2 Oxidation Mechanism of SiC T.W. Choi;H.L. Lee
  11. J. Am. Ceram. Soc. v.64 no.6 Oxidation Kinetics of Hot-Pressed and Sintered α-SiC J.A. Costello;R.E. Tresseler
  12. Yogyo-Kyokai-Shi v.67 no.8 Effects of Bonds in the System K₂O-Al₂O₃-SiO₂ on the Oxidation of Silicon-Carbides Bodies H. Suzuki
  13. Chemical Approach to Glass M.B. Volf
  14. J. Am. Ceram. Soc. v.42 no.12 Oxidation of Silicon Carbides P.J. Jorgensen;M.E. Wadsworth;I.B. Cutler