The Synthesis of Hydrated Aluminum Sulfate from Kaolin Using Microwave Energy

카올린으로부터 마이크로파 에너지를 이용한 무기고분자인 수화 황산 알루미늄의 합성

  • 박성수 (부산대학교 무기재료공학과) ;
  • 황은희 (LG실트론 단결정사업2팀) ;
  • 박희찬 (부산대학교 무기재료공학과)
  • Received : 1997.11.03
  • Accepted : 1998.05.23
  • Published : 1998.08.10


Hydrated aluminum sulfate, an inorganic polymer, was synthesized from kaolin in $H_2SO_4$ solution using microwave energy. The maximum rates of alumina extracted from calcined kaolin were 72.8% in a conventional process ($80^{\circ}C$, 1M, and 180min) and 99.9% in a microwave process ($90^{\circ}C$, 1M, and 60 min). Compared with the conventional one, the hydrated aluminum sulfate synthesized under the microwave process had layer structure consisting of plate-shaped large grains. After synthesis and then calcination at $1100^{\circ}C$, both products on conventional and microwave processes were ${\gamma}-Al_2O_3$ with agglomerated powders of spherical shape. The specific area of the products in conventional and microwave processes were 113.5 and $106.6m^2/g$, and their average grain sizes were 46.5 an $26.3{\mu}m$, respectively.


  1. Ceram. Trans. v.59 W. H. Sutton
  2. MRS Proc. v.347 S. J. Oda
  3. Zeolites v.13 A. Arafat;J. C. Jansen;A. R. Ebaid;H. van Beckkum
  4. J. Mater. Sci. v.26 S. S. Park;T. T. Meek
  5. Ceram. Trans. v.59 J. G. P. Binner;P. A. Davis;T. E. Cross;J. A. Fernie
  6. J. Mater. Sci. v.32 M. A. Janney;H. D. Kimrey;W. R. Allen;J. O. Kiggans
  7. J. Mater. Sci. v.30 J. Jacob;L. H. L. Chia;F. Y. C. Boey
  8. Ceram. Trans. v.21 J. D. Karz;R. D. Blake
  9. Am. Ceram. Soc. Inc. OH L. D. Hart
  10. Am.Ceram. Soc.Bull. v.76 H. M. Juarez (et al.)
  11. Anal. Chem. v.58 L. B. Fischer
  12. Am. Ceram. Soc. Bull. v.68 W. H. Sutton
  13. Ceram. Trans. v.59 M. J. Kennedy
  14. Am. Chem. Soc. Bull. v.76 M. Madono;R. P. Racher;M. K. Kunka
  15. Ceram. Trans. v.36 Z. Fathi;D. C. Folz;D. E. Clark;R. Hutcheon
  16. MRS symp. Proc. v.347 B. Krieger
  17. J. Am. Ceram. Soc. v.80 S. A. Nightingale;H. K. Wormer;D. P. Dunne
  18. 요업학회지 v.19 백용혁
  19. MRS Symp. Proc. v.124 I. J. Chabinsky
  20. MRS Symp. Proc. v.347 E. R. Peterson
  21. MRS Symp. Proc. v.347 J. Herz;J. Chang;M. Brodwin
  22. J. Am. Ceram. Soc. v.64 E. Kato;K. Daimon;M. Nanbu
  23. Anal. Chem. v.58 H. M. Kingson;L. B. Jassie
  24. J. Mater. Sci. Lett. v.14 H. K. Kang;K. H. Kim;H. C. Park