Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Characterization of Alumina Gel Prepared by Hydrolysis of Al(OC3H7i)3

Al(OC3H7i)3의 가수분해로부터 얻어진 Al2O3 겔의 특성에 관한 연구

  • 이서우 (부산대학교 공과대학 무기재료공학과) ;
  • 문종수 (경남대학교 공과대학 무기재료공학과) ;
  • 조성백 (부산대학교 공과대학 무기재료공학과)
  • Published : 1988.02.01
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Abstract

Alumina gel was prepared by the hydrolysis of aluminum isopropoxide Al(OC3H7i)3 at low temperature. Sample were calcined at the various temperatures for 10 houres in the electric furnace, respectively. In order to investigate the various propertis-thermal properties, pore size and distribution, and the transition of crystals, infrared spectroscopy, thermal analysis, particle size analysis, scanning electron microscopy, and porosimetry were employed. Transparent alumina gel was opalized at 1200$^{\circ}C$. Porosity was about 87% with pores below 0.7$\mu\textrm{m}$ and 55% at 1200$^{\circ}C$. The gel was transformed along the rising of temperature as follows; Boehmite\longrightarrow$\delta$-Al2O3\longrightarrow$\theta$\longrightarrowAl2O3\longrightarrow${\alpha}$-Al2O3.

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