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Synthesis and characterization of La0.85Sr0.15Ga0.85Mg0.15O3-delta electrolyte by steric entrapment synthesis method
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Ceramics.
2006 (English)In: Journal of the European Ceramic Society, ISSN 0955-2219, Vol. 26, no 12, 2357-2364 p.Article in journal (Refereed) 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.

Place, publisher, year, edition, pages
2006. Vol. 26, no 12, 2357-2364 p.
Keyword [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
URN: urn:nbn:se:kth:diva-15755DOI: 10.1016/j.jeurceramsoc.2005.04.028ISI: 000238338900021ScopusID: 2-s2.0-33645924714OAI: diva2:333797
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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