Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Preparation of Alumina by the Sol-Gel Process(I) - Characteristics of Polymeric Alumina Sol

졸겔법에 의한 알루미나의 제조(I) - 중합 알루미나 졸의 특성

  • 이해욱 (연세대학교 요업공학과) ;
  • 김구대 (한국과학기술연구원 세라믹스부) ;
  • 정형진 (한국과학기술연구원 세라믹스부) ;
  • 김창은 (연세대학교 요업공학과)
  • Published : 1991.01.01
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Abstract

The polymeric alumina sol was prepared by partial hydrolysis of aluminum sec-butoxide reacted with acetylacetone and its characteristics was investigated. The effects of alcohol solvent, acetylacetone, and acid concentration to the sol were investigated. FT-IR and Al27-MASNMR were used to study hydrolysis and polymerization reaction of aluminum complex. Synthesized sol showed the characteristics of polymeric alumina sol. To make a clear polymeric alumina sol, the optimum contents of acetylacetone, H2O and alcohol solvent were 0.4-0.6 mole, 0.25-1.25 mole, 3-5 mole per one mole alkoxide respectively. As a result of the Al27-MASNMR analysis, it was noted that hexa-penta-coordinated Al were main structure.

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References

  1. Sol-Gel Technology for Thin Films, Fibers, Preforms, Electronics and Speciality Shapes L.C. Klein
  2. Sol-Gel Science and Technology J. Livage;M.A. Aegerter;M. Jafel icci Jr.;D.F. Souza;E.D. Zanotto
  3. J. Non-Cryst. Solids v.100 Precursors for Sol-Gel Preparations M. Guglielmi;G. Carturan
  4. J. Non-Crystalline Solids v.100 Chemical Modification of Alkoxide Precursors C. Sanchez;J. Livage;M. Henry;Babonneau
  5. Metal Alkoxides D.C. Bradley;R.C. Mehrotra;D.P. Gaur
  6. J. Non-Cryst. Solids v.100 Synthesis and Reactions of Metal Alkoxides R.C. Mehrotra
  7. J. Mat. Sci. v.10 Alumina Gels that Form Porous Transparent Al₂O₃ B.E. Yoldas
  8. Amer. Ceram. Soc. Bull. v.54 no.3 Alumina Sol Preparation from Alkoxides B.E. Yoldas
  9. Sol-Gel Science C.J. Brinker;G.W. Scherer
  10. IR Data Book Aldrich Co.
  11. J. Am. Ceram. Soc. v.71 no.2 Early Stages of Alumina Sol-Gel Formation in Acidic Media;An (TEX)$^27Al$(/TEX) Nuclear Magnetic Resonance Spectroscopy Investigation L.F. Nazar;L.C. Klein