La0.8Sr0.2Ga0.8Mg0.2-xCoxO3-delta (LSGMC) powders containing different amounts of Co (X = 0.05 and 0.085) were prepared by a citrate sol-gel method. Crystalline powders were obtained by firing at 1000 degrees C (10 h) and dense high-purity pellets were prepared by pressing (300 MPa) and sintering in air at 1475 degrees C (5, 10 and 20 h). The sintered pellets of LSGMC were characterized by X-Ray Diffraction (XRD) Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS). The conductivity of sintered LSGMC pellets containing different amounts of Co ions in the B sites of the perovskite lattice was assessed by electrochemical impedance spectroscopy (EIS) in the 250-750 degrees C temperature range. Conductivity Values and apparent activation energies were in good agreement with previously published data referring to materials with same composition, but prepared by solid-state reaction.

Polini, R., Falsetti, A., Traversa, E., Schaef, O., Knauth, P. (2005). Electrochemical behaviour of Co-doped LSGM perovskltes prepared by sol-gel synthesis. In Solid State Ionics-2004 (pp.211-216). WARRENDALE : MATERIALS RESEARCH SOCIETY.

Electrochemical behaviour of Co-doped LSGM perovskltes prepared by sol-gel synthesis

POLINI, RICCARDO;TRAVERSA, ENRICO;
2005-01-01

Abstract

La0.8Sr0.2Ga0.8Mg0.2-xCoxO3-delta (LSGMC) powders containing different amounts of Co (X = 0.05 and 0.085) were prepared by a citrate sol-gel method. Crystalline powders were obtained by firing at 1000 degrees C (10 h) and dense high-purity pellets were prepared by pressing (300 MPa) and sintering in air at 1475 degrees C (5, 10 and 20 h). The sintered pellets of LSGMC were characterized by X-Ray Diffraction (XRD) Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS). The conductivity of sintered LSGMC pellets containing different amounts of Co ions in the B sites of the perovskite lattice was assessed by electrochemical impedance spectroscopy (EIS) in the 250-750 degrees C temperature range. Conductivity Values and apparent activation energies were in good agreement with previously published data referring to materials with same composition, but prepared by solid-state reaction.
Symposium on Solid State Ionics
Boston, MA
NOV 29-DEC 02, 2004
Materials Research Society, MRS
Rilevanza internazionale
2005
Settore CHIM/03 - CHIMICA GENERALE E INORGANICA
Settore ING-IND/22 - SCIENZA E TECNOLOGIA DEI MATERIALI
English
Fuel Cells; Ionic conductors; Sol-gel synthesis; Perovskites; lanthanum gallate
Intervento a convegno
Polini, R., Falsetti, A., Traversa, E., Schaef, O., Knauth, P. (2005). Electrochemical behaviour of Co-doped LSGM perovskltes prepared by sol-gel synthesis. In Solid State Ionics-2004 (pp.211-216). WARRENDALE : MATERIALS RESEARCH SOCIETY.
Polini, R; Falsetti, A; Traversa, E; Schaef, O; Knauth, P
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/34086
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