Coagulation of mixed organic systems and alumina particles for paste production |
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| Affiliation: | 1. The State Key Laboratory on High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. Tokyo University of Agriculture and Technology, Tokyo 183-8538, Japan;1. Shenzhen Key Laboratory of New Lithium-ion Battery and Mesoporous Materials, College of Chemistry and Chemical Engineering, Shenzhen University, Shenzhen 518060, PR China;2. College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, PR China;3. College of Computer Science and Software Engineering, Shenzhen University, Shenzhen 518060, PR China;1. Centre Européen de la Céramique—Ecole Nationale Supérieure de Céramique Industrielle, Groupe d’Etudes des Matériaux Hétérogènes, 12 rue Atlantis, F-87068 Limoges, France;2. Centre Européen de la Céramique—Ecole Nationale Supérieure de Céramique Industrielle, Laboratoire Sciences des Procédés Céramiques et Traitements de Surface, 12 rue Atlantis, F-87068 Limoges, France;1. Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa, Sakyo-ku, Kyoto 606-8502, Japan;2. Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan |
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| Abstract: | Pastes of alumina with plastic properties were prepared by direct coagulation casting (DCC) of concentrated suspensions (≥50 vol%). Two polyelectrolytes were used to produce mixed systems of organic and mineral particles. An anionic polymer, bearing both sulfonate and carboxylate functions, was used to disperse efficiently alumina powder in water. A cationic polymer, the chitosan (CT), which complexes with the anionic one was added into the stable suspension to form an organic network dispersed into the ceramic matrix. The sequence of addition of the chitosan in the suspension appears to be a significant parameter in order to optimise the suspension formulation. After in situ coagulation, cylinders were extruded. |
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