Magnetic shields for SQUID applications were successfully fabricated using high Tc superconducting BSCCO. To produce shields with appropriate superconducting properties and close dimensional control, it was necessary to develop new processing techniques. Shields were produced by casting liquid BSCCO into molds, heat treating and machining. This technique is applicable to fabricating other types of superconducting devices requiring bulk superconductors with complex shapes and close dimensional control.
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Rayne, R.J., Toth, L.E., Bender, B.A. et al. The Fabrication and Magnetic Shielding Properties of Melt Cast Bi-Sr-Ca-Cu-O. MRS Online Proceedings Library 169, 1279–1282 (1989). https://doi.org/10.1557/PROC-169-1279