About The Journal
  Aims and Scope
  Editorial Board
  Submit a Manuscript 
  Subscription Information
Articles & Issues
  Issue
  Search
For Authors
  Instructions to Authors
  Ethics in Publishing
  Peer Review Process
  Author's Checklist
  Copyright Transfer Form
Contact us
 
 
 
 
Issue
HWAHAK KONGHAK,
Vol.35, No.6, 832-837, 1997
γ-Al2O3 막의 미세구조 조절을 위한 γ-AlO(OH) 졸 제조시 숙성의 영향
Effect of Aging among γ-AlO(OH) Sol Preparation Steps Variables to Control Microstructure of γ-Al2O3 Particles
유승준, 이정운, 황운연, 윤호성, 박형상
본 연구는 γ-Al2O3 막의 미세구조 특성을 조절하기 위한 연구 목적의 일환으로 졸 제조 공정 변수의 영향을 고찰하였다. 알루미늄 이소프로폭사이드를 출발물질로 사용하여 가수분해/축중합반응, 숙성, 해교과정을 거쳐서 γ-AlO(OH) 졸을 제조하였고, 600℃의 열처리를 거쳐 고온에서 안정한 γ-Al2O3 입자를 제조하였다. 본 연구결과, 숙성이 γ-AlO(OH) 입자 특성은 물론 γ-Al2O3 입자 특성에 이르기까지 큰 영향을 미침을 알았다. 숙성에 따라 γ-AlO(OH) 및 γ-Al2O3 입자의 결정도의 증가, 비표면적 감소 및 평균 기공경 증가를 나타냈으며, 제조된 γ-AlO(OH) 입자의 입도분포를 조절할 수 있었다. 숙성에 의해 조절된 γ-AlO(OH) 졸 입자의 특성은 소결처리후의 γ-Al2O3 입자 특성에 직결되는 결과를 가져왔으므로 γ-Al2O3 막의 미세구조 특성을 제어하기 위해서는 γ-AlO(OH) 졸 제조공정 가운데 숙성의 영향이 중요하다는 사실을 밝혔다.
In this study, we investigated the effects of sol preparation process variables in order to control microstructure characterization of γ-Al2O3 particles. Using aluminum isopropoxide as a starting material, we prepared γ-AlO(OH) sol solution through the process of hydrolysis/polycondensation, aging, peptization and then manufactured stable γ-Al2O3 particles at high temperature through thermal treatment at 600℃. As a result of this study, we knew that aging among the sol preparation step had an influence upon characterization of γ-Al2O3 particles as well as γ-AlO(OH) particles. According to aging, we could control the crystallinity and microstructure of γ-AlO(OH) and γ-Al2O3 particles. And we could also control the size distribution of average γ-AlO(OH) sol particles. The microstructure of γ-AlO(OH) particles controlled by aging had an influence the microstructure of γ-Al2O3 particles. Hence, we knew that the aging was the most important step to control microstructure of γ-Al2O3 membrane.
Keywords: Sol-Gel; Hydrolysis; Polycondensation; Aging; Peptization; Microstructure; γ-AlO(OH); γ-Al2O3 Membranes
[References]
  1. Chan KC, Brownstein AK, Ceram. Bull., 70(4), 703, 1991
  2. Larcot A, Fabre JP, Guizard C, Cot L, J. Membr. Sci., 39, 203, 1988
  3. Uhlhorn RJR, Keizer K, Burggraaf AJ, J. Membr. Sci., 66, 271, 1992
  4. Lin YS, Burggraaf AJ, J. Membr. Sci., 79, 65, 1993
  5. Yoldas BE, Am. Ceram. Soc. Bull., 54(3), 289, 1975
  6. Yoldas BE, J. Mater. Sci., 10, 1856, 1975
  7. Yoldas BE, J. Appl. Chem. Biotechnol., 23, 803, 1973
  8. Leenaars AFM, Keizer K, Burggraaf AJ, J. Mater. Sci., 19, 1077, 1984
  9. Wilson MJ, "Clay Mineralogy: Spectroscopic and Chemical Determinative Methods," CHAPMAN & HALL, 1994
  10. Yoldas BE, "Molecular and Microstructural Effects of Condensation Reactions in Alkoxide-Based Alumina Systems," eds. Mackenzie, J.D. and Ulrich, D.R., John Wiley & Sons, 333, 1988
[Cited By]
  1. Yoo SJ, Lee JW, Hwang UY, Park HS, Park DR, Jang HD, Yoon HS, Korean Journal of Chemical Engineering, 17(4), 438, 2000
  2. Yoo SJ, Baek WS, Park HJ, Lee JW, Kim SG, Hwang UY, Park HS, Yoon HS, HWAHAK KONGHAK, 40(3), 371, 2002
  3. Yoo SJ, Lee JW, Hwang UY, Yoon HS, Park HS, HWAHAK KONGHAK, 36(5), 695, 1998
  4. Kim SY, Lee KH, Bae SY, Yoo KP, HWAHAK KONGHAK, 36(2), 293, 1998
  5. Yoo SJ, Yoon HS, Jang HD, Lee JW, Hong ST, Lee MJ, Lee SI, Jun KW, Korean Journal of Chemical Engineering, 23(4), 683, 2006
  6. Yoo SJ, Kwak DH, Kim HK, Hwang UY, Park HS, Yoon HS, Jang HD, Korean Chemical Engineering Research, 46(3), 545, 2008
참고문헌정보(참고문헌, 인용문헌)는 화학공학소재연구정보센터에 의해 제공되고 있습니다.