Novel fabrication of more homogeneous water-soluble binder system feedstock by surface modification of oleic acid |
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| Affiliation: | 1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100084, PR China;2. Sate Key Laboratory of New Ceramics and Fine processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, PR China;1. Laboratoire des Matériaux Ferroélectriques (LMF), Unité de Physique Mathématiques, 05UR15-04, Université de Sfax, Faculté des Sciences de Sfax (FSS), Route de Soukra km 3.5, B.P. 1171, 3000 Sfax, Tunisia;2. Laboratoire de Physique de la Matière Condensée (LPMC), Université de Picardie, Jules Verne, Pôle Scientifique, 33 rue Saint-Leu, 80039 Amiens Cedex 1, France;3. Laboratoire de Chimie Inorganique, Université de Sfax, Faculté des Sciences de Sfax, BP 1171, Tunisia;1. New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China;2. The Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, PR China;1. College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China;2. College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, China |
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| Abstract: | Compared to conventional debinding process of wax-based binders used in ceramic injection molding, polyethylene glycol-based binders (water-soluble binders) with its high efficiency and environmental acceptability have appeared as a good alternative. However, water-soluble binder feedstock still presents some problems such as powder–binder separation or particle segregation which limits injected parts’ final properties. In the present work, we have successfully prepared the more homogeneous water-soluble feedstock with lower shear viscosity by a prior ball milling treatment to induce a small quantity of oleic acid to the surface of zirconia powders before the mixing process. Also, the surface modification mechanism of oleic acid to zirconia powders has been systematically discussed. With the modified powder, as-leached part with less agglomeration and phase separation has been fabricated, which suggests a novel modification method for fabricating injection molded ceramic parts by using water-soluble binders. |
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| Keywords: | Ceramic injection molding (CIM) More homogeneous feedstock Oleic acid (OA) Water-soluble binders |
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