Microstructure and permeability of porous zirconia ceramic foams prepared via direct foaming with mixed surfactants |
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| Affiliation: | 1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China;1. Henan Key Laboratory of High Temperature Functional Ceramics, School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China;2. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China;1. School of Metallurgical Engineering, Anhui University of Technology, Ma’anshan 243032, China;2. School of Chemistry and Resources Engineering, Honghe University, Mengzi 661199, China;3. State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Panzhihua 617000, China;4. Institute of Energy, Hefei Comprehensive National Science Center, Hefei 230041, China;5. The State key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China;6. Bengbu Institute of Metrology, Anmin Road 100, Economic Development Zone, Bengbu 233017, China;7. College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China;1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China;2. National-provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology, Wuhan University of Science and Technology, Wuhan 430081, China;3. Chair of Ceramics, Montanuniversitaet Leoben, A-8700 Leoben, Austria;4. School of Chemical Engineering, Qinghai University, Xining 810016, China |
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| Abstract: | The permeability performance of porous ceramics from particle-stabilized foams is closely associated with the connectivity between bubble-evolved pores. In order to regulate the connectivity of pore structure, the zirconia ceramic foams were fabricated by direct foaming with mixed surfactants of cetyltrimethyl ammonium bromide (CTAB) and sodium N-lauroyl sarcosinate (SLS). Different solid loadings and CTAB:SLS mixing ratios were used in this study. The results indicate that the pore structures of zirconia ceramic foams were interconnected by open windows on the cell walls, and the porosity and average size of cell and cell windows could be tailored by adjusting the solid loading and CTAB:SLS mixing ratio. The decrease in solid loading and CTAB:SLS mixing ratio caused larger porosity and size of cells and cell windows, and thus resulted in the obvious augment of Darcian (k1) and non-Darcian (k2) permeability constants. The ranges of k1 and k2 of the as-fabricated zirconia ceramic foams are 6.92 × 10?13-4.05 × 10?10 m2 and 2.09 × 10?5-3.19 × 10?9 m respectively. |
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| Keywords: | Ceramic foams Zirconia Mixed surfactants Permeability Direct foaming |
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