Combustion synthesis and characterization of Pr0.8Sr 0.2Co1-xFxO3 nanocrystalline powders

Edoardo Magnone*, Masaru Miyayama, Enrico Traversa

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

6 Scopus citations

Abstract

Different sets of perovskite-type oxides of general formula Pr 0.8Sr0.2Co1-xFexO3 (x = 0.0, 0.2, 0.5, 0.8 and 1.0) were successfully prepared by the amorphous citrate method and auto-combustion synthesis at low temperature. Simultaneous thermogravimetric and differential thermal analysis (TG-DTA) was carried out on dried precursor gels to determine the perovskite-phase formation process, and thus discriminate the ignition temperature, actual combustion temperature, and temperature synthesis of the oxide. The calcination behaviour was studied at temperatures up to 1273 K. Single-phase nanocrystalline powders were obtained with controllable grain size from 30 to 100 nm as a function of the heating. Induced couple plasma (ICP) spectroscopy results indicated that for the prepared samples the actual metal contents were nearly equal to the nominal values. X-Ray diffraction (XRD) results showed that Pr0.8Sr 0.2Co1-xFexO3 as-combusted compounds possessed a rhombohedral to orthorhombic structure, depending on the iron content. Composition dependence of lattice constants was observed to follow the Vegard's law. Moreover, the perovskite-type nano-powder oxides were characterized as electrodes on Ce0.8Sm0.2O2-x pellets in symmetrical cells, and the electrochemical properties of the electrode/electrolyte interfaces were investigated using electrochemical impedance spectroscopy (EIS). copyright The Electrochemical Society.

Original languageEnglish (US)
Title of host publicationSolid State Ionic Devices IV
Pages313-322
Number of pages10
Volume1
Edition7
DOIs
StatePublished - 2005
Externally publishedYes
Event4th International Symposium on Solid-State Ionic Devices - 208th Meeting of the Electrochemical Society - Los Angeles, CA, United States
Duration: Oct 16 2005Oct 21 2005

Other

Other4th International Symposium on Solid-State Ionic Devices - 208th Meeting of the Electrochemical Society
CountryUnited States
CityLos Angeles, CA
Period10/16/0510/21/05

ASJC Scopus subject areas

  • Engineering(all)

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