Aggregatively stable suspensions of micrometer powders of doped barium cerate for electrophoretic deposition of thin-film coatings of solid-oxide fuel cells |
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| Authors: | E. G. Kalinina E. Yu. Pikalova V. D. Zhuravlev S. V. Scherbinin A. P. Safronov |
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| Affiliation: | 1.Institute of Electrophysics, Ural Branch, Russian Academy of Sciences,Yekaterinburg,Russia;2.Ural Federal University named after the first President of Russia B.N. Yeltsin,Yekaterinburg,Russia;3.Institute of High-Temperature Electrochemistry, Ural Branch,Russian Academy of Sciences,Yekaterinburg,Russia;4.Institute of Solid-State Chemistry, Ural Branch,Russian Academy of Sciences,Yekaterinburg,Russia |
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| Abstract: | ![]()
Potentialities of the method of electrophoretic deposition of thin-film coatings based on micrometer powders of multidoped barium cerate BaCe0.8Sm0.19Cu0.01O3–δ (BCSCuO) and BaCe0.89Gd0.1Cu0.01O3–δ (BCGCuO) were considered. Micrometer powders of BCSCuO and BCGCuO were produced by the methods of solid-phase and citrate-nitrate syntheses, respectively. The dispersity, fraction composition, and electrokinetic potential of nonaqueous suspensions of these powders and the electrokinetic parameters of the electrophoretic deposition process were examined. An ultrasonic treatment and ultracentrifugation produced aggregatively stable suspensions of BCGCuO and BCSCuO micrometer particles in a mixed (70/30 vol %) isopropanol–acetyl acetone medium. These suspensions are characterized by high positive values of the zeta potential (+24 and +28 mV, respectively). Thin film coatings of the electrolyte materials BCSCuO and BCGCuO, which are of interest for the technology of medium-temperature solid-oxide fuel cells, were produced by the electrophoretic deposition onto a dense model cathode. |
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