Superconductor technology: apparatus – material – process – Processes of producing or treating high temperature... – Process of making wire – tape – cable – coil – or fiber
Patent
1992-07-31
1994-11-01
King, Roy
Superconductor technology: apparatus, material, process
Processes of producing or treating high temperature...
Process of making wire, tape, cable, coil, or fiber
505704, 505742, 427 62, 29599, 1741251, H01B 1300, H01B 1204
Patent
active
053607848
ABSTRACT:
An oxide superconducting material is coated with silver or an alloy thereof and shaped into a linear body, and the linear body is subjected to diameter reduction by means of groove roll rolling, a swaging machine and the like, and then differential speed rolling and heat treatment are repeatedly performed, whereby the linear body is shaped into a tape-shaped wire material. The microstructure control in the longitudinal direction is performed uniformly and efficiently, and a superconducting wire having a high c-axis orientation ratio and a large critical current density Jc at a service temperature is obtained.
REFERENCES:
patent: 5100865 (1992-03-01), Yamamoto et al.
patent: 5104849 (1992-04-01), Furukawa
Sekine et al., "Comparison of Bi-system 2223 and 2212 thick superconducting tapes: grain alignment, current density, and strain effects", J. Appl. Phys. 70(3) Aug., 1991, pp. 1596-1599.
Enomoto et al, "The high field magnetic dependence of critical current density at 4.2 K for Ag-sheathed Bi.sub.2 Sr.sub.2 Ca Cu.sub.2 O.sub.y superconducting tape", Jpn. J. Appl. Phys. 29(3) Mar. 1990, pp. L447-L449.
Suzuki et al, "Preparation of Silver-Sheathed Superconducting Wires based on Bismuth Lead Strontium Calcium Copper Oxide", Adv. Supercond. IV, Proc. Int. Symp. Supercond., 4th, Meeting Date 1991, pp. 569-572 (Abstract).
Patent Abstracts of Japan, vol. 13, No. 468 (E-834) Oct. 1989 & JP-A-11 83 102 (Fujikura) (Same as Item (AL) above).
Cryogenics 1990, vol. 30, May 1990, pp. 430-433-Dependence of critical current density on microstructure in Ag sheathed Ba.sub.2 YCu.sub.3 O.sub.6+x -K. Osamura, et al.
IEEE Transactions on Magnetics, vol. 27, No. 2, Mar. 1991, pp. 890-893-Bi-based high temperature superconducting tapes by cold rolling method-G. Kozlowski et al.
Superconducting Science and Technology, vol. 2, No. 2, 1989, pp. 111-114-Effect of cold-working on the critical current density of Ag-sheathed Ba.sub.2 YCu.sub.3 O.sub.6+x tapes-K. Osamura, et al.
Kimura Toshio
Suzuki Motokazu
Takeshita Takuo
King Roy
Mitsubishi Materials Corporation
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