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Author Arulraj, I. ♦ Tietz, F. ♦ Gupta, A. ♦ Jungen, W. ♦ Stover, D.
Source CSIR-Central Electrochemical Research Institute
Content type Text
Publisher Elsevier
File Format PDF
Copyright Year ©2001
Language English
Subject Domain (in DDC) Technology ♦ Chemical engineering ♦ Industrial oils, fats, waxes & gases
Subject Keyword Fuel Cells
Abstract The chemical reactivity between superconducting ceramic materials (YBa2Cu3O7-x, Bi2Sr2CaCu2O8+x and Bi2Sr2CuO6+x) and the cathode material of solid oxide fuel cells (La0.65Sr0.3MnO3) was investigated by long-term annealing experiments of pressed powder mixtures lasting two weeks at 850�C. The chemical properties at the operating temperature of a solid oxide fuel cell revealed that all three superconducting materials reacted with La0.65Sr0.3MnO3 and underwent changes in volume and density after annealing. The chemical compatibility between the superconductors and interconnect material, a ferritic steel (X 10 CrAl 18), was investigated using screen-printed thick layers of Bi2Sr2CuO6+x on steel substrates. The formation of undesirable products, especially SrCrO4, due to diffusion processes across the interface was confirmed by investigations of metallographic cross-sections. Efforts to stop the interfacial reaction by introducing a thin CuO barrier layer between the superconductor and steel did not solve the problem.
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2001-01-01
Journal PeerReviewed