- Volume 40 Issue 8
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
- Chung, Jong Jae (Department of Chemistry Koyungpook National University) ;
- Kim, Chang Hyun (Department of engineering Kaya University) ;
- Lee, Byung Kyo (Department of Inorganic Material Engineering, Kyungpook National University) ;
- Ri, Chang Seop (Department of Chemistry Keimyung University) ;
- Lee, Hae Wook (Department of engineering Kaya University)
- 정종재 (경북대학교 자연과학대학 화학과) ;
- 김창현 (가야대학교 공학부) ;
- 이병교 (경북대학교 공과대학 무기재료공학과) ;
- 이창섭 (계명대학교 자연과학대학 화학과) ;
- 이해욱 (가야대학교 공학부)
- Published : 19960800
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.
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