✍ Scribed by M.L. Fontaine; Y. Larring; J.B. Smith; H. Raeder; Ø.S. Andersen; M.-A. Einarsrud; K. Wiik; R. Bredesen
No coin nor oath required. For personal study only.
A versatile fabrication process combining three techniques easy to scale up was successfully developed to prepare advanced multilayered structures integrating proton conducting ceramic materials. This enables the production of novel solid oxide fuel cells with proton conducting electrolytes (PCFCs) and asymmetric membranes designed as thin dense layers coated on thick porous mechanical supports. The manufacturing process makes use of ceramic powders synthesized by spray-pyrolysis using water-based solutions. Porous supports of membranes and anodes of PCFCs were prepared by tape-casting and their porosity was tuned by addition of corn starch filler. Membrane and electrolyte layers were prepared by spincoating colloidal ceramic suspensions. A single coating-sintering step was carried out to produce gas tight layers with thickness ranging from 4 to 26 m. Cathodes of PCFCs were screen-printed using commercial Pt ink. This paper describes the successful preparation of SrCe 0.95 Yb 0.05 O 3-δ asymmetric membranes and novel concepts of PCFCs integrating BaZr 0.9 Y 0.1 O 3-δ and La 0.995 Sr 0.005 NbO 4+δ electrolytes.
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Papers from The American Ceramic Society's 31st International Conference on Advanced Ceramics and Composites, held in Daytona Beach, Florida, January 21-26, 2007. Topics include processing and manufacturing technologies for a wide variety of non-oxide and oxide based structural ceramics, particulate