Zirconia ultrafiltration membranes on silicon carbide substrate: microstructure and water flux |
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| Affiliation: | 1. School of Resources and Environmental Engineering, Shandong University of Technology, Zibo 255049, China;2. School of Materials Science and Engineering, Shandong University of Technology, Zibo 255049, China;1. Beijing Key Laboratory of Advanced Ceramic and Refractories, Central Iron & Steel Research Institute, Beijing, 100081, China;2. State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China;1. Korea University of Science & Technology (UST), Daejeon 305-350, Republic of Korea;2. Powder and Ceramics Division, Korea Institute of Materials Science (KIMS), Changwon, Gyeongnam 642-831, Republic of Korea;1. Inorganic Membranes, Department of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands;2. RWTH Aachen University, AVT.CVT – Chair of Chemical Product and Process Engineering, Turmstr. 46, 52064 Aachen, Germany;3. DWI – Leibniz Institute for Interactive Materials, Forckenbeckstr. 50, 52074 Aachen, Germany |
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| Abstract: | This study reported the preparation of ZrO2/SiC ceramic membrane with silicon carbide as the substrate and intermediate layers and zirconia as the selective layer. The substrate and intermediate layers were sintered by evaporation-condensation process at 2200 and 1900 ℃, respectively. After sintering, the intermediate layer presented layer thickness of 50 μm, pore size of 0.87 μm and pure water permeability of 2140 L/(m2·h). The selective lay was deposited on the silicon carbide substrate by dip-coating method and then sintered in the temperature range from 800 to 1000 ℃. For the membrane coated by one dip-coating cycle and sintered at 800 ℃, it presented average pores of 82 nm and water flux of 850 L/(m2·h). Due to the exclusion of low-melting oxides during sintering, the ZrO2/SiC ceramic membrane can satisfy the separation and purification of chemical corrosion and high temperature wastewater. |
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| Keywords: | Silicon carbide Zirconia Sintering Water flux Pore size |
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