Solid State Ionics, Vol.302, 126-132, 2017
Cyclic electrophoretic deposition of electrolyte thin-films on the porous cathode substrate utilizing stable suspensions of nanopowders
In this study, nanopowder Ce-0.8(Sm0.75Sr0.2Ba0.05)(0.2)O2 - delta (CSSBO) with average diameter of particles of 15 nm and specific area of 53 m(2)/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 - delta (LNFO) collector layer and a La2NiO4 +/- delta (LNO) functional layer. Thick LNFO support (1 mm) with 20% of pore former had a porosity of 45% after sintering at 1400 degrees C. The values of gas-permeability which was measured by means of the computerised experimental set, varied from 31.60 x 10(-3) to 25.71 x 10(-3) mu m(2). A thin LNO functional layer was brush painted on the top of the support and pre-sintered at 1350 degrees C, 2 h. Green CSSBO film with a thickness of 8 pm was stepwise.deposited on the graded cathode substrate and sintered at 1400 C,4 h. The critical load for fracture of the film (approximately 5 pm thick after sintering) was 111 +/- 14 mN, conductivity was equal to 2.40 x 10(-2) S/cm at 750 degrees C. (C) 2017 Elsevier B.V. All rights reserved.