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ReactionSequencing During Processingof the 123 Superconductor

Summary: ReactionSequencing During Processingof the
123 Superconductor
William J. Thornson,* Hong Wang, David B. Parkman, and Dong X. Li
Departmentof Chemical Engineering, Washington State University, Pullman, Washington 99164-2710
Michael Strasik and Thomas S. Luhman*
BoeingAerospace, Seattle, Washington 98124-2207
Chan Han and llhan A. Aksay*
Departmentof MaterialsScience and Engineering, University of Washington,
Seattle, Washington 98195
Reaction sequencing studies were
conducted for two precursors to the
123 superconductor in air and helium
environments. In air, the reactants in
both precursor systems produce an
intermediate 123 phase at lo00 K with-
out going through the BaCuOz and
Y,BaCuO, intermediate phases, ob-
served in earlier work with mixed
powder precursors. In helium, the
fully developed 123 tetragonal phase


Source: Aksay, Ilhan A. - Department of Chemical Engineering, Princeton University


Collections: Materials Science