ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
SrFe0.6Cu0.3Ti0.1O3-δ (SFCTO) composite-oxide powder was synthesized by citric acid complexmethod and studied as mixed oxygen-ionic and electronic conducting membrane material. The formationprocess of the perovskite-type compound was detected by XRD, infra-red spectrum and thermo gravimetricanalysis; the effects of ethylene glycol added in the sol formation process on the size distribution ofthe powder and the oxygen permeation flux of the membrane were examined. A stable sol was formedwhen the molar ratio of total metal ions to citric acid and ethylene glycol was 1:2:3 and the pH value was5.5; the characteristic absorption peaks of citric acid in the dried gel, O-H and -COO-, moved toward lowfrequency direction for 200 cm-1 and 135 cm-1 respectively due to the complexing action of the metal ionsand citric acid. As the dried gel was heated in air up to 400°C, SrCO3 phase appeared by the combustionof citric acid and ethylene glycol. The perovskite phase started to form at 700 °C, SrCO3 phase reducedgradually and the single phase of SFCTO was obtained at 900 °C. The SFCTO dense membrane preparedunder the optimum conditions exhibited an oxygen permeation flux of 0.7 ml·min-1·cm-2 at 900°C
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.368-372.259.pdf
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