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Correlation between electrical and mechanical properties in La1-xSrxGa1-yMgyO3-d ceramics used as electrolytes for solid oxide fuel cells
dc.contributor.author | Morales Comas, Miguel |
dc.contributor.author | Roa Rovira, Joan Josep |
dc.contributor.author | Pérez Falcón, José Manuel |
dc.contributor.author | Moure Arroyo, Alberto |
dc.contributor.author | Tartaj, Jesus |
dc.contributor.author | Espiell Álvarez, Ferran |
dc.contributor.author | Segarra Rubi, Merce |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica |
dc.date.accessioned | 2013-11-15T11:03:24Z |
dc.date.created | 2014 |
dc.date.issued | 2014 |
dc.identifier.citation | Morales, M. [et al.]. Correlation between electrical and mechanical properties in La1-xSrxGa1-yMgyO3-d ceramics used as electrolytes for solid oxide fuel cells. "Journal of power sources", 2014, vol. 246, p. 918-925. |
dc.identifier.issn | 0378-7753 |
dc.identifier.uri | http://hdl.handle.net/2117/20620 |
dc.description.abstract | The relation between the electrical and the mechanical properties in Sr and Mg doped LaGaO3 ceramics, which can be used as electrolyte for solid oxide fuel cells, was investigated in terms of hardness and ionic conductivity. For this purpose, ceramic materials corresponding to the compositions of La1−xSrxGa1−yMgyO3−δ (LSGM), with x = 0.1 and y = 0.2, and x = 0.15 and y = 0.2, were prepared. LSGM powders synthesized by the ethylene glycol complex solution method were shaped into disks by isostatic pressing method. The variation in the microstructure of samples was achieved by varying the sintering temperature between 1300 and 1450 °C. While the effect of the different microstructures on the electrical properties of the LSGM electrolytes was determined by impedance spectroscopy, the influence of the hardness was extracted by instrumented indentation technique. The results showed a linear correlation between the hardness and total ionic conductivity within the temperature range of 500–660 °C, thus indicating that both properties were strongly influenced on the relative density and purity of the samples. It has a potential practical implication: by measuring the LSGM hardness at room temperature, one can achieve an approach to the ionic conductivity within the studied temperature range. |
dc.format.extent | 8 p. |
dc.language.iso | eng |
dc.rights | Attribution-NonCommercial-NoDerivs 3.0 Spain |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
dc.subject | Àrees temàtiques de la UPC::Enginyeria dels materials |
dc.subject.lcsh | Fuel cells |
dc.subject.lcsh | Ceramics |
dc.subject.other | Solid oxide fuel cell |
dc.subject.other | electrolyte |
dc.subject.other | lanthanum-gallate |
dc.subject.other | hardness |
dc.subject.other | ionic conductivity |
dc.subject.other | instrumented indentation technique |
dc.title | Correlation between electrical and mechanical properties in La1-xSrxGa1-yMgyO3-d ceramics used as electrolytes for solid oxide fuel cells |
dc.type | Article |
dc.subject.lemac | Piles de combustible |
dc.subject.lemac | Materials ceràmics |
dc.contributor.group | Universitat Politècnica de Catalunya. CIEFMA - Centre d'Integritat Estructural, Fiabilitat i Micromecànica dels Materials |
dc.identifier.doi | 10.1016/j.jpowsour.2013.08.028 |
dc.description.peerreviewed | Peer Reviewed |
dc.relation.publisherversion | http://www.sciencedirect.com/science/article/pii/S0378775313013682 |
dc.rights.access | Restricted access - publisher's policy |
local.identifier.drac | 12825147 |
dc.description.version | Postprint (published version) |
dc.date.lift | 10000-01-01 |
local.citation.author | Morales, M.; Roa, J.; Pérez, J.; Moure, A.; Tartaj, J.; Espiell, F.; Segarra, M. |
local.citation.publicationName | Journal of power sources |
local.citation.volume | 246 |
local.citation.startingPage | 918 |
local.citation.endingPage | 925 |
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