Synthesis of Bi-Pb-Ca-Sr-Cu-O oriented polycrystal superconducto

Details Synthesis of Bi-Pb-Ca-Sr-Cu-O oriented polycrystal superconducto Synthesis of Bi-Pb-Ca-Sr-Cu-O oriented polycrystal superconducto

1990-03-05

1991-10-15

Lieberman, Paul

Superconductor technology: apparatus, material, process

High temperature , per se

Having tc greater than or equal to 150 k

252521, 423604, 423617, 423618, 423635, 501123, 505727, 505782, C01F 1102, C01G 302, C01G 2102, C01G 2900

Patent

active

050574868

ABSTRACT:
A particulate mixture comprised of Bi.sub.2 CaSr.sub.2 Cu.sub.2 O.sub.8.+-.x where x ranges from 0 to 0.5, Ca.sub.2 CuO.sub.3, cupric oxide and lead oxide, wherein the Bi.sub.2 CaSr.sub.2 Cu.sub.2 O.sub.8.+-.x crystals are oriented with their c-axis at least sufficiently parallel to each other so as not to differ significantly from a common direction, is initially reacted producing an intermediate swollen partially reacted product which is pressed to remove the swelling and then sintered to produce a superconductive Bi.sub.2 yPb.sub.y Ca.sub.2 Sr.sub.2 Cu.sub.3 O.sub.10.+-.z body where y ranges from 0.1 to 0.5 and z ranges from zero to less than 1.

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