한국세라믹학회지 (Journal of the Korean Ceramic Society)

  • 제25권2호
  • /
  • Pages.111-116
  • /
  • 1988
  • /
  • 1229-7801(pISSN)
  • /
  • 2234-0491(eISSN)
한국세라믹학회 (The Korean Ceramic Society)
권호 표지

침전법으로 제조한 Alumina 분말의 특성(1): 알루미늄 수산\ulcorner루

Properties of Alumina Powder Prepared by Precipitation Method(I): Aluminum Hydrate

  • 홍기곤 (연세대학교 공과대학 요업공학과) ;
  • 이홍림 (연세대학교 공과대학 요업공학과)
  • 발행 : 1988.02.01
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초록

Aluminum hydrates were prepared by precipitation method using Al2(SO4)3$.$18H2O as a starting material and NH4OH as precipitation agent. The phases of aluminum hydrate were changed from amorphous aluminum hydrate to pseudo-boehmite of AlOOH form and bayerite, gibbsite, hydragillite and norstrandite of Al(OH)3 form with increasing pH. As pH increased, agglomeration phenomena were reduced. Aluminum hydrates of AlOOH and Al(OH)3 form represented dehydration of structural water near 175$^{\circ}C$ and 385$^{\circ}C$, and 280$^{\circ}C$, respectively. As the ratio of Al(OH)3 to AlOOH increased, specific surface area was reduced.

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참고문헌

  1. Am. Ceram. Soc. Bull. v.66 no.2 Nonconventional Powder Preparation Techniques D. 0W. Johnson, Jr.
  2. Advances in Ceramics;Ceramic Powder Science v.21 Innovations in Ceramic Powder Preparation G. L. Messing(et. al.)
  3. Private Communication Preparation of Ceramic Fine Powders by the Solution Technique and Their Characteristics S. H. Hyun
  4. J. Am. Ceram. Soc. v.56 no.4 Effect of Anions on Hot-Pressing of MgO M. H. Leipold;C. M. Kapadia
  5. Mineral. Mag. v.43 The Development of Porous Microstructures during the Dchydration of Boehmite S. J. Wilson