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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