Cobalt spinel CoAl2O4 via sol-gel process: elaboration and surface properties
Identifieur interne : 000110 ( Istex/Curation ); précédent : 000109; suivant : 000111Cobalt spinel CoAl2O4 via sol-gel process: elaboration and surface properties
Auteurs : S. Chemlal [Maroc] ; A. Larbot [France] ; M. Persin [France] ; J. Sarrazin [France] ; M. Sghyar [Maroc] ; M. Rafiq [Maroc]Source :
- Materials Research Bulletin [ 0025-5408 ] ; 2000.
English descriptors
Abstract
In this work the preparation of cobalt spinel CoAl2O4 is described. The technique of colloidal solution destabilization was used as the sol-gel process. The powder obtained from the dried gel was characterized by thermal analysis (thermogravimetric and differential), X-ray diffraction, infrared spectroscopy, and specific surface area measurement. Crystallization of CoAl2O4 spinels occurs at about 400°C. The study of surface properties (surface charge and electrophoretic mobility) of the spinel powder fired at 600°C, in suspension in different electrolyte solutions (10−3 molar ionic strength), shows that the spinel material charge depends on the pH of the solution. The spinel sol was used for the preparation of membrane by the slip-casting method.
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DOI: 10.1016/S0025-5408(00)00444-X
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<front><div type="abstract" xml:lang="en">In this work the preparation of cobalt spinel CoAl2O4 is described. The technique of colloidal solution destabilization was used as the sol-gel process. The powder obtained from the dried gel was characterized by thermal analysis (thermogravimetric and differential), X-ray diffraction, infrared spectroscopy, and specific surface area measurement. Crystallization of CoAl2O4 spinels occurs at about 400°C. The study of surface properties (surface charge and electrophoretic mobility) of the spinel powder fired at 600°C, in suspension in different electrolyte solutions (10−3 molar ionic strength), shows that the spinel material charge depends on the pH of the solution. The spinel sol was used for the preparation of membrane by the slip-casting method.</div>
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