Fabrication of superconducting wires and rods

Details Fabrication of superconducting wires and rods Fabrication of superconducting wires and rods

1995-01-13

1997-08-12

Lieberman, Paul

Superconductor technology: apparatus, material, process

High temperature , per se

Bismuth containing

505125, 505230, 505440, 505471, 252521, 106 125, H01B 1200, H01L 3912, C04B 3501, C04B 35505

Patent

active

056565747

ABSTRACT:
The fabrication of superconducting wires and rods having desired and consistent electrical and mechanical properties, in particular those based on Yttrium Barium Copper Oxide (YBCO) and Bismuth Strontium Calcium Copper Oxide (BSCCO), is disclosed. The first fabrication step is to form an extrudable paste by mixing YBCO or BSCCO superconducting powder with a set of organic additives, which include binder, plasticizer, lubricant, dispersant, and a solvent. The following additional steps are performed on both YBCO and BSCCO based wires or rods: (i) using a piston extruder to extrude the superconducting wire or rod; (ii) drying the wire or rod to remove the solvent; and (iii) subjecting the wire or rod to a binder burn-out treatment to remove the remaining organic additives. In addition, YBCO wires and rods also require a sintering step, while BSCCO wires and rods also require cold isostatic pressing and heat treatment steps. The formation of cracks in thicker YBCO and BSCCO based rods during the drying and heating process steps is avoided by extruding hollow rods. The additives, processing parameters, and processing stages used to fabricate the superconducting wires and rods help achieve desired and consistent electrical and mechanical properties.

REFERENCES:
patent: 4965249 (1990-10-01), De With et al.
patent: 4997812 (1991-03-01), Huang
patent: 5091221 (1992-02-01), Chu et al.
patent: 5166130 (1992-11-01), Enomoto et al.
patent: 5260263 (1993-11-01), Enomoto et al.
patent: 5338507 (1994-08-01), Anderson et al.
Kato et al "Critical Current Densities of Hot Pressed YBa.sub.2 Cu.sub.3 0.sub.7 -Ag Thick Film" Physica C 185-189 (1991) pp. 2423-2424.
S. Jin, R.C. Sherwood, R.B. Van Dover, T.H. Tiefel and D.W. Johnson, Jr., Appl. Phys. Lett., 51, 203 (1987), Jul.
M.T. Lanagan, R.B. Poeppel, J.P. Singh, D.I. Dos Santos, J.K. Lumpp, U. Balachandran, J.T. Dusek and K.C. Goretta, J. Less Comnon Metals, 149, 305 (1989). No Month Available.
S.R. Su, M. O'Connor, M. Levinson and P.G. Rossoni, Physica C, 178, 81 (1991). No Month Available.
L.D. Woolf, W.A. Raggio, F.E. Elsner, M.V. Fisher, R.B. Stephens, T.L. Figueroa, C.H. Shearer, J.D. Rose, K.M. Schaubel, R.A. Olstad, T. Ohkawa, D.M. Duggan, M. DiMartino and R.L. Fagaly, Appl. Phys. Lett., 58, 534 (1991). Feb.
H. Shimizu, H. Kumakura and K. Togano, Jpn. J. Appl. Phys., 27, L414 (1988). Mar.
G.Y. Onoda, L.L. Hench, "The Rheology of Organic Binder Solutions" in Ceramic Processing Before Firing, by G.Y. Onoda, John Wiley, 1978. No Month Available.
H. Kumakura, K. Togano and H. Maeda, J. of Appl. Phys., 67 (1990). Apr.
S.S. Oh and K. Osamura, J. of Mat. Sci., 26 (1991). No Month Available.
U. Endo, S. Koyama and T. Kawai, Jap. J. of Appl. Phys., 27 (1988). No Month Available.
S.S. Oh and K. Osamura, Supercond. Sci. Tech., 4 (1991). No Month Available.
I. Bransky and J. Bransky, J. Appl. Phys., 66, 5510 (1989). Dec.
M.K. Ihm, B.R. Powell and R.L. BIoink, J. Mat. Sci., 25, 1664 (1990). No Month Available.
F. Yeh and K.W. White, J. Appl. Phys., 70, 4989 (1991). Nov.
D. Ponnusamy and K. Ravi-Chandar, "Extrusion of Superconducting Wires of YBa.sub.2 Cu.sub.3 0.sub.7-x," J. Mater. Res., vol. 8, No. 2, Feb. 1993, pp. 268-273.
Suguru Suzuki, "Effect of Extrusion on the Critical Current Density of Bi.sub.1.4 Pb.sub.0.6 Sr.sub.2 Ca.sub.2 Cu.sub.3 0.sub.x Superconducting Wires," J. Am. Ceram. Soc., 74[4], pp. 714-717 (Apr. 1991).
Roger N. Wright, et al., "Mechanical Considerations in the Processing of High T.sub.C Superconductors," The Minerals, Metals & Materials Society, 1990, pp. 217-239. No Month Available.

Affiliated with

Also associated with

Rating

Fabrication of superconducting wires and rods does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fabrication of superconducting wires and rods, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fabrication of superconducting wires and rods will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-160321