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Title

Ionic and electronic conductivity of 5% Ca-Doped GdNbO4

AuthorsHaugsrud, Reidar; Ballesteros, Belén CSIC ORCID; Lira-Cantú, Mónica CSIC ORCID; Norbuy, Truls
KeywordsCalcium
Gadolinium compounds
Ionic conductivity
Electric impedance
Electric potential
Issue Date5-Jun-2006
PublisherElectrochemical Society
CitationJournal of the electrochemical society 153(8): J87-J90 (2006)
AbstractThe ionic and electronic conduction of Gd0.95Ca0.05NbO4 has been determined with ac conductivity measurements and impedance spectroscopy in combination with transport number measurements using the open circuit voltage (electromotive force) of concentration cells. Depending on the reaction conditions, protons, oxygen ions, and electron holes are the main contributions to the total conductivity. The conductivity data have been modeled according to a point-defect structure where the acceptor, Ca, is predominantly compensated by oxygen vacancies and protons. Thermodynamic constants have been derived for the hydration of the oxygen vacancies and the transport properties of oxygen ions, protons, and electron holes.
Description4 pages.-- PACS: 66.30.Hs; 61.72.Ji; 65.60.+a
Publisher version (URL)http://dx.doi.org/10.1149/1.2203933
URIhttp://hdl.handle.net/10261/21809
DOI10.1149/1.2203933
ISSN0013-4651
Appears in Collections:(ICMAB) Artículos

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