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

Riccardo Polini*, Alessia Falsetti, Enrico Traversa, Oliver Schäf, Philippe Knauth

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

La0.8Sr0.2Ga0.8Mg0.2-xCo xO3-δ (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°C (10 h) and dense high-purity pellets were prepared by pressing (300 MPa) and sintering in air at 1475°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°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.

Original languageEnglish (US)
Article numberK3.15
Pages (from-to)211-216
Number of pages6
JournalMaterials Research Society Symposium Proceedings
Volume835
StatePublished - 2005
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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