Strengthening of Gadolinia‐Doped Ceria (Ce0.80Gd0.20O2‐δ) Thick Ceramic Membranes with Co‐Doping of 1 mol% CuO |
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| Authors: | Jingjie Cao Xinfa Dong Yingchao Dong Xuyong Feng |
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| Affiliation: | 1. School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, People's Republic of China;2. Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, People's Republic of China;3. Ningbo Urban Environment Observation and Research Station‐NUEORS, Chinese Academy of Sciences, Ningbo, People's Republic of China |
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| Abstract: | Nano‐sized Ce0.79Gd0.2Cu0.01O2‐δ (CGCO) and Ce0.80Gd0.2O2‐δ (CGO) powders were synthesized via a facile PVA‐assisted combustion method. Full densification can be achieved at much lower temperature (950°C) with minor CuO doping (1 mol%, CGCO) as compared with CGO (1400°C); meanwhile, mechanical strength can be enhanced with CuO co‐doping. The CGCO sintered at 1100°C possesses a relative density of 98.80% and biaxial flexural strength of 302 ± 35 MPa, which is higher than those of CGO sintered at 1400°C (96.43%, 250 ± 39 MPa). A tentative microstructural analysis indicates that this strength enhancement can be attributed to a change in fracture mode from partial to complete transgranule dominant. |
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