High-temperature stability study of the oxygen-ion conductor La0.9Sr0.1Ga0.8Mg0.2O3-x
Because of their high oxygen-ion conductivity, LaGaO3-based perovskites substituted on the A and B sites, such as La0.9Sr0.1Ga0.8Mg0.2O3-x (LSGM), are considered to be promising alternatives to replace YSZ currently used in SOFCs. LSGM was prepared by a complexing sol-gel process and characterised b...
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| Veröffentlicht in: | Journal of materials chemistry 2000, Vol.10 (8), p.1829-1833 |
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| container_title | Journal of materials chemistry |
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| creator | SHANWEN TAO POULSEN, F. W GUANGYAO MENG SØRENSEN, O. T |
| description | Because of their high oxygen-ion conductivity, LaGaO3-based perovskites substituted on the A and B sites, such as La0.9Sr0.1Ga0.8Mg0.2O3-x (LSGM), are considered to be promising alternatives to replace YSZ currently used in SOFCs. LSGM was prepared by a complexing sol-gel process and characterised by XRD, TG-DTA and conventional weight analysis. The room- temperature structure is orthorhombic, space group Pnma, with a = 0.5534, b = 0.5507, c = 0.7800 nm. After heating at 1000 C, the lattice parameters of LSGM shift a little, and La4SrO7 and SrLaGaO4 separate from the parent phase, which may further affect other properties. The weight change of LSGM at 750 C is insignificant and the phase is also stable after heating at 750 C in H2 for a total of 132 h. Defect chemistry modelling supports the view that LSGM is not single phase at 1000 C. 19 refs. |
| doi_str_mv | 10.1039/b003890n |
| format | Article |
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The weight change of LSGM at 750 C is insignificant and the phase is also stable after heating at 750 C in H2 for a total of 132 h. 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After heating at 1000 C, the lattice parameters of LSGM shift a little, and La4SrO7 and SrLaGaO4 separate from the parent phase, which may further affect other properties. The weight change of LSGM at 750 C is insignificant and the phase is also stable after heating at 750 C in H2 for a total of 132 h. Defect chemistry modelling supports the view that LSGM is not single phase at 1000 C. 19 refs.</abstract><cop>Cambridge</cop><pub>Royal Society of Chemistry</pub><doi>10.1039/b003890n</doi><tpages>5</tpages></addata></record> |
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| source | Royal Society of Chemistry Journals Archive (1841-2007); Royal Society Of Chemistry Journals 2008- |
| subjects | Condensed matter: structure, mechanical and thermal properties Exact sciences and technology Inorganic compounds Physics Structure of solids and liquids crystallography Structure of specific crystalline solids Water, oxides, hydroxides, peroxides |
| title | High-temperature stability study of the oxygen-ion conductor La0.9Sr0.1Ga0.8Mg0.2O3-x |
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