Michael Ellis Smith
Engineers at Paige Loop, Los Alamos, NM
License number
Colorado 7180
Issued Date
Aug 27, 1966
Renew Date
Oct 1, 2010
Expiration Date
Oct 31, 2013
Type
Professional Engineer
Address
Address
535 Paige Loop, Los Alamos, NM 87544
Professional information
Synthesis Of Bi.sub.1.8 Pb.sub.0.4 Sr.sub.2 Ca.sub.2 Cu.sub.3 O.sub.x Superconductor
US Patent:
5569641, Oct 29, 1996
Filed:
Apr 10, 1995
Appl. No.:
8/419485
Inventors:
Michael G. Smith - Los Alamos NM
Assignee:
University of California
Los Alamos National Laboratory
Los Alamos National Laboratory
International Classification:
C04B 35622, C04B 3564, H01B 1200
US Classification:
505433
Abstract:
Two-powder processes for the synthesis of superconducting (Bi, Pb)-2223/Ag-clad wires by the oxide-powder-in-the-robe are provided. The first precursor powder, of nominal stoichiometry CaCuO. sub. x, is a solution-synthesized mixture of Ca. sub. 45 Cu. sub. 55 O. sub. 2 and CaO. Using these oxide precursor mixtures, superconducting tapes with well-aligned grains and reproducible critical current densities J. sub. c in the range of 20,000 to 26,000 A/cm. sup. 2 at 75 K in self-field after annealing less than 200 hours were obtained.