Abstract

In this study, nanopowder Се0.8(Sm0.75Sr0.2Ba0.05)0.2O2−δ (CSSBO) with average diameter of particles of 15nm and specific area of 53m2/g prepared by the method of laser evaporation was used for a cyclic electrophoretic deposition (EPD) from a non-aqueous suspension on a functionally graded cathode substrate with a LaNi0.6Fe0.4O3−δ (LNFO) collector layer and a La2NiO4±δ (LNO) functional layer. Thick LNFO support (1mm) with 20% of pore former had a porosity of 45% after sintering at 1400°С. The values of gas-permeability which was measured by means of the computerised experimental set, varied from 31.60×10−3 to 25.71×10−3μm2. A thin LNO functional layer was brush painted on the top of the support and pre-sintered at 1350°С, 2h. Green CSSBO film with a thickness of 8μm was stepwise deposited on the graded cathode substrate and sintered at 1400°С, 4h. The critical load for fracture of the film (approximately 5μm thick after sintering) was 111±14mN, conductivity was equal to 2.40×10−2S/cm at 750°C.

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