Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Fabrication and Sintering Characteristic of MgO-Al2O3-SiO2 System Ceramic Raw Materials(Mullite, Spinel and Cordierite) II. Powder and Mechanical Properties of Mg-Al Spinel Ceramics Prepared by Alkoxide

MgO-Al2O3-SiO2계 요업원료(Mullite, Spinel, Cordierite)의 제조 및 소결특성 II. Alkoxide로 제조한 Mg-Al Spinel분말 및 소결체의 특성

  • 김창은 (연세대학교 공과대학 요업공학과) ;
  • 이홍림 (연세대학교 공과대학 요업공학과) ;
  • 안용진 (연세대학교 공과대학 요업공학과) ;
  • 김배연 (연세대학교 공과대학 요업공학과)
  • Published : 1989.05.01
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Abstract

Fine spinel powder was prepared from the Mg-Al double alkoxide synthesized using magnesium powder, aluminum foil and sec-butyl alcohol. This powder was compared with powder prepared by mixing two commercial alkoxides. The spinelization was started at 50$0^{\circ}C$ and was almost completed at 100$0^{\circ}C$ with a good crystallinity in the double alkoxide system. In mixed alkoxide system, homogeneous spinel powder was not obtained and MgO existed as a second phase because of solubility and hydrolysis rate differences of two alkoxides. The relative density of specimen prepared by double alkoxide was 99% and specimen prepared by mixed alkoxide was 95%. The modulus of rupture of specimens prepared by double alkoxide and mixed alkoxide was 49.9kg/$\textrm{mm}^2$ and 41.6kg/$\textrm{mm}^2$, respectively.

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