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Mechanical strengthening of Sm-doped CeO2 ceramics by 1 mol% cobalt oxide for solid oxide fuel cell application |
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| Authors: | Yingchao Dong Stuart HampshireJian-er Zhou Xinfa DongBin Lin Guangyao Meng |
| Affiliation: | a Materials and Surface Science Institute (MSSI), University of Limerick (UL), Ireland b Key Lab of Jiangxi Universities for Inorganic Membranes, Jingdezhen Ceramic University, China c USTC Lab for Solid State Chemistry and Inorganic Membranes, University of Science and Technology of China (USTC), China d School of Chemistry and Chemical Engineering, South China University of Technology (SCUT), China |
| Abstract: | Combustion processed nano-sized Ce0.79Sm0.20Co0.01O2−δ (CSCoO) and Ce0.80Sm0.20O2−δ (CSO) were sintered at various temperatures, and mechanical properties and microstructures were characterized. The results demonstrate that besides a lowering of sintering temperature to achieve sufficient densification, the doping of very minor amounts of CoO (1 mol%) to CSO significantly enhanced mechanical properties. The CSCoO sintered at 1100 °C exhibits a biaxial flexural strength of 354 ± 42 MPa which compared with 194 ± 57 MPa for CSO with a similar relative density sintered at 1400 °C. This slight modification in chemical composition also resulted in a slight improvement in micro-hardness. |
| Keywords: | SOFC electrolyte Sm-doped CeO2 CoO co-doping Mechanical strengthening |
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