dc.creator | Vega Castillo, Jesús Eduardo | |
dc.creator | Ravella, Uday K. | |
dc.creator | Corbel, Gwenaël | |
dc.creator | Lacorre, Philippe | |
dc.creator | Caneiro, Alberto | |
dc.date.accessioned | 2016-01-13T15:12:10Z | |
dc.date.available | 2016-01-13T15:12:10Z | |
dc.date.created | 2016-01-13T15:12:10Z | |
dc.date.issued | 2013-11 | |
dc.identifier | Vega Castillo, Jesús Eduardo; Ravella, Uday K.; Corbel, Gwenaël; Lacorre, Philippe; Caneiro, Alberto; Thermodynamic stability of La2Mo2−yWyO9, La2Mo2−yWyO8.96+0.02y and La7Mo7(2−y)/2W7y/2O30 (y = 0, 0.5 and 1.0); Royal Society of Chemistry; Dalton Transactions; 43; 6; 11-2013; 2661-2669 | |
dc.identifier | 1477-9226 | |
dc.identifier | http://hdl.handle.net/11336/3576 | |
dc.description.abstract | The role of W content on the limit oxygen partial pressure (pO2) for stability of fast oxygen-ion conductors La2Mo2−yWyO9 with y = 0, 0.5 and 1.0 has been studied by means of thermogravimetric analysis (TGA) under controlled atmospheres. At 718 °C, below the pO2 stability limit of La2Mo2−yWyO9, the perovskite related compounds La7Mo7(2−y)/2W7y/2O30 were stabilized even for y = 1.0. At 608 °C, the first stage of reduction of β-La2Mo2−yWyO9 leads to the formation of the crystallized oxygen deficient La2Mo2−yWyO8.6+0.02y phase. X-ray powder diffraction shows that the stabilization of the high temperature β-form through tungsten substitution observed in fully oxidized La2Mo2−yWyO9 samples is preserved upon slight reduction. The n-type conductivity arising from the mixed valence state of molybdenum becomes less and less predominant as the W content increases. Further reduction causes amorphization. At both temperatures, W substitution does not enhance the thermodynamic stability of the La2Mo2−yWyO9 ion conductor under a reducing atmosphere but only slows down the kinetics of reduction. | |
dc.language | eng | |
dc.publisher | Royal Society of Chemistry | |
dc.relation | info:eu-repo/semantics/altIdentifier/url/http://pubs.rsc.org/en/Content/ArticleLanding/2014/DT/C3DT52174E#!divAbstract | |
dc.relation | info:eu-repo/semantics/altIdentifier/url/http://dx.doi.org/DOI:10.1039/C3DT52174E | |
dc.rights | https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ | |
dc.rights | info:eu-repo/semantics/restrictedAccess | |
dc.subject | Lamox | |
dc.subject | Thermodynamic | |
dc.subject | Stability | |
dc.title | Thermodynamic stability of La2Mo2−yWyO9, La2Mo2−yWyO8.96+0.02y and La7Mo7(2−y)/2W7y/2O30 (y = 0, 0.5 and 1.0) | |
dc.type | info:eu-repo/semantics/article | |
dc.type | info:ar-repo/semantics/artículo | |
dc.type | info:eu-repo/semantics/publishedVersion | |