Effect of particle size on the shaping of ceramics by slip casting |
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| Authors: | Carolina Tallon Monika Limacher George V. Franks |
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| Affiliation: | 1. Chemical and Biomolecular Engineering, University of Melbourne, 3010 VIC, Australia;2. Department of Nonmetallic Inorganic Materials, ETH Zurich, Switzerland;1. Waikato Centre for Advanced Materials (WaiCAM), School of Engineering, University of Waikato, Private Bag 3105, Hamilton, New Zealand;2. School of Engineering and Advanced Technology, Massey University, Private Bag 102904, North Shore City 0745, Auckland, New Zealand;1. School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing 100083, PR China;2. Department of Chemical & Materials Engineering, The University of Auckland, Private Bag 92019, New Zealand;1. Institute for Research on Ceramics (IRCER), UMR CNRS 7315, Univ. Limoges, F-87068 Limoges, France;2. Israel Ceramic and Silicate Institute (ICSI), Technion City, 32000 Haifa, Israel;3. SOLCERA, F-45063 Evreux, France;4. CILAS, F-45100 Orléans, France |
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| Abstract: | The effect of the nanometric-ranged particle size of the starting powder through a simple and well-established shaping method, slip casting, has been studied. Several alumina suspensions with the same viscosity (but different solid content suspensions) and different particle size (11, 44, 190 and 600 nm) were prepared and shaped into a dense body. The green and sintered densities ranged between 30–67% and 63–99% of the theoretical value, respectively. These values, together with the microstructure observations reveal the effect of the solid content of the suspensions and the characteristics of the ceramic powder, leading to the determination of an optimal particle size. Based on both processability (rheological behaviour) and microstructure (density and grain size) it has been determined that particles with sizes ranging 100–300 nm are the best for preparing concentrated suspensions with low viscosity and bodies with density close to the theoretical value when using conventional pressureless sintering densification. |
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