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Conductivity of doped LaGaO3 prepared by citrate sol-gel method

Stijepovic, I. ; Darbandi, A. J. ; Srdic, V. V. (2010)
Conductivity of doped LaGaO3 prepared by citrate sol-gel method.
In: Journal of Optoelectronics and Advanced Materials, 12
Artikel, Bibliographie

Kurzbeschreibung (Abstract)

Lanthanum-gallate powders (LSGM), with composition La1-xSrxGa1-yMgyO3-δ (0 ≤ x, y ≤ 0.2), were prepared using citrate solgel method. As-synthesized powders were calcined at 900°C, uniaxially pressed and sintered in air at different temperatures (up to 1450°C). Sintered samples contained cubic perovskite phase, while only pure LaGaO3 had small amount of the secondary orthorhombic phase. Sintering temperature of 1450°C with dwell time of 2 hours was sufficient to obtain samples with densities higher than 95% TD, with exception of pure LaGaO3. Impedance spectroscopy measurements confirmed that obtained LSGM ceramics have total conductivity an order of magnitude higher than zirconiabased electrolyte. Thus, citrate sol-gel method used in this work is a promising synthesis route for production of the doped lanthanum-gallate for intermediate temperature solid oxide fuel cells.

Typ des Eintrags: Artikel
Erschienen: 2010
Autor(en): Stijepovic, I. ; Darbandi, A. J. ; Srdic, V. V.
Art des Eintrags: Bibliographie
Titel: Conductivity of doped LaGaO3 prepared by citrate sol-gel method
Sprache: Englisch
Publikationsjahr: 15 Mai 2010
Verlag: National Institute of Optoelectronics, Romania
Titel der Zeitschrift, Zeitung oder Schriftenreihe: Journal of Optoelectronics and Advanced Materials
Jahrgang/Volume einer Zeitschrift: 12
Kurzbeschreibung (Abstract):

Lanthanum-gallate powders (LSGM), with composition La1-xSrxGa1-yMgyO3-δ (0 ≤ x, y ≤ 0.2), were prepared using citrate solgel method. As-synthesized powders were calcined at 900°C, uniaxially pressed and sintered in air at different temperatures (up to 1450°C). Sintered samples contained cubic perovskite phase, while only pure LaGaO3 had small amount of the secondary orthorhombic phase. Sintering temperature of 1450°C with dwell time of 2 hours was sufficient to obtain samples with densities higher than 95% TD, with exception of pure LaGaO3. Impedance spectroscopy measurements confirmed that obtained LSGM ceramics have total conductivity an order of magnitude higher than zirconiabased electrolyte. Thus, citrate sol-gel method used in this work is a promising synthesis route for production of the doped lanthanum-gallate for intermediate temperature solid oxide fuel cells.

Freie Schlagworte: Sol-gel processes, Ionic conductivity, Impedance, Perovskite, LSGM, LaGaO3
Fachbereich(e)/-gebiet(e): 11 Fachbereich Material- und Geowissenschaften
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Gemeinschaftslabor Nanomaterialien
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Strukturforschung
Hinterlegungsdatum: 15 Feb 2013 09:58
Letzte Änderung: 16 Aug 2018 08:16
PPN:
Sponsoren: The research was supported by the Serbian Ministry of Science and Technological Development, under the Project "Synthesis of nanopowders and processing of ceramics and nanocomposites for application in novel technologies",, No. 142059 and COST 539 Project ELENA.
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