Reactive sintering of Bi2Sr2CaCu2Ox superconductors |
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| Authors: | Y F Li M E Loomans K C Goretta S E Dorris M T Lanagan R B Poeppel J J Wenzlaff P M Winandy C A Youngdahl U Balachandran P Kostic |
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| Affiliation: | (1) Energy Technology Division, Argonne National Laboratory, 60439-4838 Argonne, IL;(2) Materials Science Division, Argonne National Laboratory, 60439-4838 Argonne, IL |
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| Abstract: | Three phase assemblages were used to produce Bi2Sr2CaCu2Ox (2212) during sintering: a mixture of 20% Ca-rich 2212+80%2212, partially synthesized 2212, and Bi2Sr2CuOx (2201)+(1/2 Ca2 CuO3+1/2 CuO) (denoted 0011). The mixture of 2201+0011 produced highly pure 2212 within 50 h of heating in air at ≈850°C. Ag tubes
were filled with a mixture of 2201+0011 and worked into tapes by a powder-in-tube process. Heat treatments produced microstructures
consisting of small, highly textured 2212 grains. Tc values were ≈70K. Transport Jc values at 4.2K were ≈104 A/cm2. |
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| Keywords: | Bi-based superconductors sintering synthesis |
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