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http://hdl.handle.net/20.500.11960/3022
Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Gomes, Eduarda | - |
dc.contributor.author | Mather, Glenn C. | - |
dc.contributor.author | Figueiredo, Filipe M. | - |
dc.contributor.author | Marques, Fernando M. B. | - |
dc.date.accessioned | 2022-12-20T16:02:38Z | - |
dc.date.available | 2022-12-20T16:02:38Z | - |
dc.date.issued | 2009 | - |
dc.identifier.citation | Gomes, E., Mather, G. C., Figueiredo, F. M., & Marques, F. M. B. (2009). Microstructure and electrical properties of aluminium-substituted La(Sr)Ga(Mg)O3-δ-based solid electrolytes. Monatshefte für Chemie, 140(9), 1041-1052. https://doi.org/10.1007/s00706-009-0139-1 | pt_PT |
dc.identifier.issn | 0026-9247 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.11960/3022 | - |
dc.description.abstract | A study of the influence of the substitution of Al for Ga in the ceramic processing and electrical properties of La0.95Sr0.05Ga0.90–xAlxMg0.10O3–d (0 B x B 0.3) solid electrolytes is presented. The materials retained orthorhombic symmetry over the entire substitution range, whereas a deviation from Vegard’s law for x[0.20 suggested a maximum Al solubility of x = 0.20. Scanning electron microscopy analysis of ceramic samples revealed that grain growth was inhibited for x C 0.2. This microstructural change was related to an apparent deterioration of mechanical properties, as suggested by room-temperature Vickers hardness measurements. Impedance spectroscopy revealed a significant degradation of the grain-boundary electrical properties for x C 0.20, whereas the bulk conductivity was enhanced for 0.10 B x B 0.15. Oxygenpermeability measurements confirmed that the studied materials remain essentially pure ionic conductors. An ionic conductivity maximum of 0.047 S/cm at 700 C was obtained for x = 0.10. The effect of aluminium in the grainbulk ionic conductivity is discussed in terms of defect cluster models and assuming fast oxygen diffusion along domain walls. | pt_PT |
dc.language.iso | por | pt_PT |
dc.rights | openAccess | pt_PT |
dc.subject | Solid electrolytes | pt_PT |
dc.subject | Grain boundaries | pt_PT |
dc.subject | Impedance spectroscopy | pt_PT |
dc.subject | Oxides | pt_PT |
dc.subject | Electrochemistry | pt_PT |
dc.subject | Ceramics | pt_PT |
dc.title | Microstructure and electrical properties of aluminium-substituted La(Sr)Ga(Mg)O3-δ-based solid electrolytes | pt_PT |
dc.type | article | pt_PT |
dc.date.updated | 2022-12-05T11:30:30Z | - |
dc.description.version | 371C-9F16-EBDE | Eduarda Gomes | - |
dc.description.version | N/A | - |
dc.identifier.slug | cv-prod-93953 | - |
dc.peerreviewed | yes | pt_PT |
degois.publication.firstPage | 1041 | pt_PT |
degois.publication.lastPage | 1052 | pt_PT |
degois.publication.volume | 140 | pt_PT |
degois.publication.issue | 9 | pt_PT |
degois.publication.title | Monatshefte für Chemie | pt_PT |
dc.identifier.doi | 10.1007/s00706-009-0139-1 | - |
dc.identifier.eid | 2-s2.0-68949177302 | - |
Appears in Collections: | ESTG - Artigos indexados à WoS/Scopus |
Files in This Item:
File | Description | Size | Format | |
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s00706-009-0139-1.pdf | 696.92 kB | Adobe PDF | View/Open |
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