Fabrication of transparent yttria ceramics by alcoholic slip-casting |
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| Affiliation: | 1. School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China;2. Key Laboratory of Materials for High Power Lasers, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Science, Shanghai 201800, China;3. University of Chinese Academy of Science, Beijing 100049, China;1. Key Laboratory of Materials for High Power Lasers, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;2. The University of Chinese Academy of Sciences, Beijing 100049, China;1. Key Laboratory of Materials for High-Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Science, Shanghai 201800, China;2. School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China;3. University of Chinese Academy of Sciences, Beijing 100049, China;1. Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;1. School of Electrical and Electronic Engineering, Nanyang Technological University, 639798 Singapore;2. School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China;3. School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore;1. School of Electrical and Electronic Engineering, Nanyang Technological University, 639798, Singapore;2. School of Materials Science and Engineering, Nanyang Technological University, 639798, Singapore;3. School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China |
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| Abstract: | Y2O3 transparent ceramics were prepared from alcoholic slurries of Y2O3 nanopowders via a slip-casting method to avoid the hydrolysis issue. Polyvinyl pyrrolidone (PVP), polyethylene glycol (PEG) and polyethylenimine (PEI) were used as dispersants to improve the rheological properties of the slurries. It was found that PEI is the most effective dispersant in ethanol. The adsorbed amount of PEI was evaluated by infrared absorption and rheology measurements. Y2O3 slurry with a solid loading of 20.8 vol% and a viscosity of <0.1 Pa s at the shear rate of 10 s−1 was obtained using 1.5 wt% PEI. The slurry yielded a homogeneous green body, and finally resulted in a high-quality Y2O3 ceramic with the in-line transmittance of 80% at 800 nm. |
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| Keywords: | Alcoholic slip-casting Rheological property Polyethylenimine |
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