The sol-gel formation of Bayerite, Al(OH)3, precipitated from AlCl3·6H2O (13.6 g/l) and NH4OH (4N) at a basic pH 9 was studied. The resulting Bayerite was in the form of prisms ~3 µm in length. The transformation of this Bayerite to α-alu...
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https://www.riss.kr/link?id=A104500152
2004
-
KCI등재후보,SCIE,SCOPUS
학술저널
196-202(7쪽)
10
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
The sol-gel formation of Bayerite, Al(OH)3, precipitated from AlCl3·6H2O (13.6 g/l) and NH4OH (4N) at a basic pH 9 was studied. The resulting Bayerite was in the form of prisms ~3 µm in length. The transformation of this Bayerite to α-alu...
The sol-gel formation of Bayerite, Al(OH)3, precipitated from AlCl3·6H2O (13.6 g/l) and NH4OH (4N) at a basic pH 9 was studied. The resulting Bayerite was in the form of prisms ~3 µm in length. The transformation of this Bayerite to α-alumina was [Al(OH)3 ] → γ-Al2O3 → δ-Al2O3 → θ-Al2O3 → α- Al2O3. The slowest of these transitions, the one which controls the transformation by nucleation and growth kinetics, is the θ-Al2O3 to α-Al2O3. This rate-controlling transformation was studied by two different thermal treatments. One was isothermal and the other had two steps, the first of which created “in situ” nuclei, to enhance the transformation rate. The latter treatment reduced the time for the transformation at 1100oC from >80 h to only ~13 h and reduced the activation energy from 419.02 kJ mol−1 to 317.52 kJ mol−1. It produced a finer crystal size of α-alumina.
참고문헌 (Reference)
1 C.J. Brinker, "ThePhysics and Chemistry of Sol-Gel Processing" Academic Press 589-609, 1990
2 A. Salvador-Morales, "Study of the TransformationKinetics of a Bayerite Gel to α-alumina with and withoutSeds M Sc. Thesis with Specialization inMetalurgical Enginering" 14-45, 1996
3 L. Carrasco-Mondragon, "Proc-edings of the XV Annual Meeting of MetalurgyResearch" 1-20, 1993
4 W.D. Kingery, "Intro-duction to Ceramics^pp. 320-447^Wiley Interscience-Second edition" 2000
5 J. Aguilar-Santiln, "Influence of the Heat Treatment inthe Kinetics and Grain Size of α-alumina Transformedfrom θ-alumina Obtained by Calcination of Bayerite B Sc. Thesis in Metalurgical Engineering" 1-32, 1997
1 C.J. Brinker, "ThePhysics and Chemistry of Sol-Gel Processing" Academic Press 589-609, 1990
2 A. Salvador-Morales, "Study of the TransformationKinetics of a Bayerite Gel to α-alumina with and withoutSeds M Sc. Thesis with Specialization inMetalurgical Enginering" 14-45, 1996
3 L. Carrasco-Mondragon, "Proc-edings of the XV Annual Meeting of MetalurgyResearch" 1-20, 1993
4 W.D. Kingery, "Intro-duction to Ceramics^pp. 320-447^Wiley Interscience-Second edition" 2000
5 J. Aguilar-Santiln, "Influence of the Heat Treatment inthe Kinetics and Grain Size of α-alumina Transformedfrom θ-alumina Obtained by Calcination of Bayerite B Sc. Thesis in Metalurgical Engineering" 1-32, 1997
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학술지 이력
연월일 | 이력구분 | 이력상세 | 등재구분 |
---|---|---|---|
2023 | 평가예정 | 해외DB학술지평가 신청대상 (해외등재 학술지 평가) | |
2022-10-24 | 학회명변경 | 한글명 : 세라믹연구소 -> 청정에너지연구소영문명 : Ceramic Research Institute -> Clean-Energy Research Institute | |
2020-01-01 | 평가 | 등재학술지 유지 (해외등재 학술지 평가) | |
2019-08-19 | 학회명변경 | 한글명 : 세라믹공정연구센터 -> 세라믹연구소영문명 : Ceramic Processing Research Center -> Ceramic Research Institute | |
2011-01-01 | 평가 | 등재학술지 유지 (등재유지) | |
2006-01-01 | 평가 | SCI 등재 (등재후보1차) | |
2003-01-01 | 평가 | 등재후보학술지 선정 (신규평가) |
학술지 인용정보
기준연도 | WOS-KCI 통합IF(2년) | KCIF(2년) | KCIF(3년) |
---|---|---|---|
2016 | 0 | 0 | 0 |
KCIF(4년) | KCIF(5년) | 중심성지수(3년) | 즉시성지수 |
0 | 0 | 0 | 0 |