Fabrication of Highly Porous Samaria-Doped Ceria by Acid Leaching Magnesia from Magnesia–Samaria-Doped Ceria Ceramics |
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| Authors: | Feng-Yun Wang Guo-Bin Jung Ay Su Shih-Hong Chan Xiang-Ai Li Lifen Xiao |
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| Affiliation: | Fuel Cell Center and Department of Mechanical Engineering, Yuan Ze University, Taoyuan County 320, Taiwan; School of Chemistry, Huazhong Normal University, Hubei 430079, China |
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| Abstract: | ![]()
Highly porous Ce0.8Sm0.2O1.9 (CSO) was prepared by acid leaching MgO from CSO–MgO (CSM) ceramics with acetic acid solution. The effects of leaching conditions and MgO content were studied. Using 60 vol% acetic acid at 85°C for 8.5 h, the MgO in CSM ceramics was effectively leached out but no CSO was dissolved; thus highly porous CSO with an open porosity of 68% was successfully prepared. The open porosity of sufficiently leached pellet increased with the MgO content, but when the vol% of MgO exceeded 60%, the flexural strength of the leached pellets decreased from 25 to 1 MPa. The leaching approach allows the fabrication of porous CSO with the vol% of MgO up to 60%. |
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