Sol-gel synthesis and characterization of yttria stabilized zirconia membranes |
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| Institution: | 1. Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan;2. Interdisciplinary Graduate School of Science and Engineering, Shimane University, 1060 Nishikawatsu, Matsue 690-8504, Japan;3. Department of Electronic Engineering, Graduate School of Engineering, Tohoku University, 6-6-5 Aramaki, Aoba-ku, Sendai 980-8579, Japan;4. Department of Chemistry and Materials Science, Graduate School of Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro, Tokyo 152-8550, Japan;1. School of Mechanical Engineering, Korea University, Anam-dong, Seongbuk-gu, Seoul 136-713, Republic of Korea;2. High-temperature Energy Materials Research Center, Korea Institute of Science and Technology (KIST), Hawolgok-dong, Seongbuk-gu, Seoul 136-791, Republic of Korea;3. Nonmetallic Inorganic Materials, ETH Zurich, Wolfgang-Pauli-Str.10, CH-8093 Zurich, Switzerland;1. Department of Materials Science and Engineering, Sharif University of Technology, Azadi Avenue, P. O. Box 11155-9466, Tehran, Iran;2. Department of Metallurgy, Niroo Research Institute, P.O. Box: 1468613113, Tehran, Iran;3. Department of Renewable Energy, Niroo Research Institute, P.O. Box: 1468613113, Tehran, Iran |
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| Abstract: | Mesoporous yttria stabilized zirconia (YSZ) membranes can be used as supports for ultrathin dense ceramic or metallic membranes, and for ultrafiltration (UF) applications in harsh environments. This paper reports synthesis and characterization of sol-gel derived UF YSZ membranes. 0.25 M zirconia sol was prepared by hydrolysis and condensation of zirconium n-propoxide. A solution-sol mixing method was used to dope 8 mol% yttria in zirconia. Supported YSZ membranes were prepared by dip-coating the yttrium doped zirconia sol on the porous α-alumina substrate, followed by drying and calcining under controlled conditions. The membranes prepared in this study are of cubic fluorite phase. Helium permeation experiments show that the supported membranes are pin-hole (or crack) free. The 5 time dip-coated membrane determined by SEM micrograph is about 3.5 μm in thickness, with an average pore diameter of 3 nm. |
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