Superconductor technology: apparatus – material – process – Processes of producing or treating high temperature... – Process of making wire – tape – cable – coil – or fiber
Patent
1993-08-18
1996-08-27
Bonner, Melissa
Superconductor technology: apparatus, material, process
Processes of producing or treating high temperature...
Process of making wire, tape, cable, coil, or fiber
505432, 505433, 505705, 505704, H01B 1204, H01B 1300
Patent
active
055501036
ABSTRACT:
A method of producing a high temperature long length coil of superconductor wire or tape having improved critical current densities by utilizing an in-line pressing operation to heal the microcracks in the tape or wire which were introduced in rolling and coiling operations. The material can be Bismuth-2223, Bismuth 2212, Thallium-1234 or any other high temperature superconducting material. In the case of the Bismuth-2223, an improved "powder-in-tube" processing operation is provided to utilize excess bismuth, calcium, and copper in the initial composition material, and forming a partially developed Bi-2223 phase in the precursor powder introduced into the silver tubes. The final product has a 90-100% Bi-2223 phase with fine dispersions of secondary phases, to provide improved flux pinning thereby improving the critical current density of the material.
REFERENCES:
patent: 4906609 (1990-03-01), Yamauchi
patent: 5004722 (1991-04-01), Tallman
patent: 5057488 (1991-10-01), Arendt
patent: 5221663 (1993-06-01), Assmann
Haldar, Pradeep et al., "Enhancement in Critical Current Density of Bi-Pb-Sr-Ca-Cu-O Tapes by Thermomechanical Processing: Cold Rolling Versus Untaxial Pressing" Applied Physics Letters, vol. 60, No. 4, Jan. 27, 1992, pp. 495-497.
Shibuta, Nobuhiro et al. "Transport Critical Current Properties of Silver-Sheathed B. Based Superconducting Tapes and Coils at 4.2K" Japanese Journal of Applied Physics, vol. 30, N. 12B, Dec. 1991, pp. L2083-L2084.
Fukiger, R. "The Deformation of B (223) Tapes by Hot Rolling" High Temp. Superconductivity Spring Symposium, Apr. 12-16, 1993.
Halder et al, "Bulk Superconductivity at 112K in Tl(Ba,Ca).sub.2 Ca.sub.3 Cu.sub.4 O.sub.10.5+.gamma. with Four Consecutive Copper Layers", Science, vol. 241, Sep. 2, 1988, pp. 1198-1200.
Haldar Pradeep
Motowidlo Leszek
Bonner Melissa
IGC/Advanced Superconductors, Inc.
LandOfFree
Superconductor tapes and coils and method of manufacture does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Superconductor tapes and coils and method of manufacture, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Superconductor tapes and coils and method of manufacture will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1056202