Condition and Mechanism of Precipitation of Intravesicular Aluminum Ion in Preparation of Monodispersed Spherical Fine Particles With Use of Vesicles

베시클을 이용한 단분산 구형 미분체 합성에서 베시클 내 알루미늄 이온의 침전조건과 침전메카니즘

  • 정종재 (경북대학교 자연과학대학 화학과) ;
  • 김창현 (가야대학교 공학부) ;
  • 이병교 (경북대학교 공과대학 무기재료공학과) ;
  • 이창섭 (계명대학교 자연과학대학 화학과) ;
  • 이해욱 (가야대학교 공학부)
  • Published : 19960800

Abstract

In preparation of fine alumina powders with use of vesicle, the effect of variation of pH in extravesicular dispersion system to mechanism of precipitation and shape and size distribution of precipitate was investigated. The results of observation by TEM and turbidimeter were obtained as follows. Reaction between aluminum ion and hydroxyl ion to produce precipitate within vesicle was initiated at pH 11.4 and spherical fine precipitates, about 50 nm size, were formed at pH 12.0. About pH 12.3, size of precipitates in vesicle grew twice as great as those formed below pH 12.0 because of the agglomeration and coalescence of vesicleswith time.

Keywords

References

  1. Mat. Res. Soc. Symp. Proc. v.180 Calvert, P.
  2. Am. Ceram. Soc. Bull. v.64 Johnson, Jr, W. D.
  3. 세라믹분체의 역할;요업회보 이희수
  4. J. Am. Ceram. Soc. v.56 Cobled, R. L.
  5. Sol-Gel Science Brinker, C. T.;Harcourt, B. J.(ed.)
  6. J. Colloid Int. Sci. v.180 Bdhandarkar, S. J.
  7. J. Colloid Int. Sci. v.135 Bhandarkar, S.;Bose, A. J.
  8. Modern Ceramic Engineering Richerson, D. W.
  9. J. Colloid Int. Sci. v.122 Mann, S.;Hannington, J. P.
  10. 세라믹고체반응총론; 日本化學會編 Lee, H. J.
  11. Relation between Power Characterization and Sinterability Matsuda, S. I.
  12. Introduction to Ceramics Kingery, W. D.;Bowen, H. K.;Uhlmann, D. R.
  13. J. Colloid Int. Sci. v.139 Bhandarkar, S.;Bose, A. J.
  14. J. Chem. Soc. Dalton Trans Mann, S.
  15. 엔지니어링 세라믹스 이홍림
  16. セラミシクスの製造ブロセス-粉末製造と成形 窯業協會
  17. J. Am. Ceram. Soc. v.64 Rhodes, W. H.
  18. J. Am. Ceram. Soc. v.48 Mazdiyasn, K.S.;Lynch, C. T.;Smith Ⅱ, J. S.
  19. Formation, Packing and Sintering of Monodispersed TiO₂ Power; Barringer, E.A.;Bowen, H. K.
  20. Am. Ceram. Soc. Bull. v.48 Bratton, R. J.