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Synthesis and characterization of La0.85Sr0.15Ga0.85Mg0.15O3-delta electrolyte by steric entrapment synthesis method
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap, Keramteknologi.
2006 (engelsk)Inngår i: Journal of the European Ceramic Society, ISSN 0955-2219, E-ISSN 1873-619X, Vol. 26, nr 12, s. 2357-2364Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Strontium and magnesium doped lanthanum gallate La0.85Sr0.15Ga0.85Mg0.15O3-delta (LSGM) oxygen ionic conducting ceramics were prepared by a steric entrapment synthesis (SES) method, which is a polymeric precursor synthesis method by using polyvinyl alcohol in aqueous solution. The perovskite LSGM phase formed essentially at a calcination temperature of 900 degrees C. Pure and single perovskite LSGM phase with high relative density of 97.1% was obtained after sintering at 1450 degrees C, while the relative density of the LSGM sample sintered at the same temperature by solid state reaction (SSR) method was 80.6% in present experiment. Comparing with SSR synthesis method, the sintering temperature by SES can be reduced at least 100 degrees C. Impedance spectra revealed that the grain-boundary resistivity of LSGM synthesized by SES was smaller than that by SSR method. and the conductivities of the samples by SES were higher than those by SSR method at all measuring temperatures.

sted, utgiver, år, opplag, sider
2006. Vol. 26, nr 12, s. 2357-2364
Emneord [en]
(La,Sn) (Ga,Mg)O-3, powders-chemical preparation, X-ray methods, ionic, conductivity, doped-lanthanum gallate, oxide-ion conductor, solution polymerization, impedance spectroscopy, electrical-properties, magnesium, strontium, lagao3, route, perovskites
Identifikatorer
URN: urn:nbn:se:kth:diva-15755DOI: 10.1016/j.jeurceramsoc.2005.04.028ISI: 000238338900021Scopus ID: 2-s2.0-33645924714OAI: oai:DiVA.org:kth-15755DiVA, id: diva2:333797
Merknad
QC 20100525Tilgjengelig fra: 2010-08-05 Laget: 2010-08-05 Sist oppdatert: 2017-12-12bibliografisk kontrollert

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