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- W965867573 abstract "Preparation of High Te superconducting ceramic powders based on Bi-Sr-Ca-Cu-O by solid state and wet-chemical reaction. In the present investigation two different processing routes to obtain high critical temperature superconduc ting compounds based in Bi-Sr-Ca-Cu-O with 2212 and 2223 stoichiometrics are studied. One route is based in solid state reactions from the initial mixing of oxides or carbonates precursors and the other one by wet-chemical process based on the simultaneous coprecipitation of cooper and bismuth salts as hydroxides in a aqueous CaCOa and SrCOa suspension. SbiOa and PbO have been used as dopants, these compounds favor the formation of the 2223 phase of higher critical temperature, since the materials processed without these dopants showing a scarce presence of 2223 phase. The sintered materials have been microstructural and morphologically charac terized and the electrical properties were also examined. The obtained results indicate that the coprecipitation method increases the reactivity of the process, and decreases the synthesis and sintering temperature and times." @default.
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- W965867573 date "1993-01-01" @default.
- W965867573 modified "2023-10-17" @default.
- W965867573 title "Preparación de polvos cerámicos superconductores de alta Te basados en Bi-Sr-Ca-Cu-O por vía convencional y química" @default.
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