Патент США № | 6694600 |
---|---|
Автор(ы) | Li и др. |
Дата выдачи | 24 февраля 2004 г. |
A method is described to prepare a highly textured oxide superconductor article in a single deformation-sinter process. A precursor article including a plurality of filaments comprising a precursor oxide having a dominant amount of a tetragonal BSCCO 2212 phase and a constraining member substantially surrounding each of the filaments is provided. Each of the filaments extends along the length of the article. The oxide article is subjected to a heat treatment at an oxygen partial pressure and temperature selected to convert a tetragonal BSCCO 2212 oxide into an orthorhombic BSCCO 2212 oxide and, thereafter, roll worked in a high reduction draft in a range of about 40% to 95% in thickness so that the filaments have a constraining dimension is substantially equivalent to a longest dimension of the oxide superconductor grains. The rolled article is sintered to obtain a BSCCO 2223 oxide superconductor.
Авторы: | Qi Li (Marlborough, MA), Eric R. Podtburg (Natick, MA), Patrick John Walsh (Newton, MA), William L. Carter (Chelmsford, MA), Gilbert N. Riley, Jr. (Marlborough, MA), Martin W. Rupich (Framingham, MA), Elliott Thompson (Coventry, RI), Alexander Otto (Chelmsford, MA) |
---|---|
Заявитель: | American Superconductor Corporation (Westborough, MA) |
ID семейства патентов | 23858393 |
Номер заявки: | 09/990,953 |
Дата регистрации: | 21 ноября 2001 г. |
Application Number | Filing Date | Patent Number | Issue Date | ||
---|---|---|---|---|---|
843041 | Apr 11, 1997 | 6331675 | |||
468089 | Jun 6, 1995 | 6247224 | |||
Класс патентной классификации США: | 29/599; 505/501; 505/739; 505/742 |
Класс совместной патентной классификации: | B22F 3/18 (20130101); C04B 35/4521 (20130101); C22C 29/12 (20130101); H01L 39/248 (20130101); B22F 3/1216 (20130101); C22C 5/00 (20130101); Y10S 505/887 (20130101); Y10S 505/739 (20130101); Y10S 505/742 (20130101) |
Класс международной патентной классификации (МПК): | B22F 3/18 (20060101); B22F 3/00 (20060101); C04B 35/45 (20060101); C04B 35/01 (20060101); C22C 29/00 (20060101); C22C 29/12 (20060101); H01L 39/24 (20060101); H01L 039/24 () |
Область поиска: | ;29/599 ;505/740,739,742,501 |
4988669 | January 1991 | Dersch |
5093314 | March 1992 | Takahashi et al. |
5132278 | July 1992 | Stevens et al. |
5187149 | February 1993 | Jin et al. |
5204316 | April 1993 | Arendt et al. |
5208215 | May 1993 | Chen et al. |
5246917 | September 1993 | Hikata et al. |
5284823 | February 1994 | Chou et al. |
5288699 | February 1994 | Sato et al. |
5317008 | May 1994 | Imai |
5330969 | July 1994 | Finnemore et al. |
5635456 | June 1997 | Riley, Jr. et al. |
5661114 | August 1997 | Otto et al. |
5981444 | November 1999 | Sawada et al. |
6069116 | May 2000 | Li et al. |
6247224 | June 2001 | Li et al. |
6284712 | September 2001 | Otto et al. |
6331675 | December 2001 | Li et al. |
0 281 474 | Sep 1988 | EP | |||
0 283 313 | Sep 1988 | EP | |||
0431 643 | Jun 1991 | EP | |||
0 435 286 | Jul 1991 | EP | |||
0 447 994 | Sep 1991 | EP | |||
0 449 161 | Oct 1991 | EP | |||
0 496 281 | Jul 1992 | EP | |||
504 908 | Sep 1992 | EP | |||
0 504 909 | Sep 1992 | EP | |||
0 536 730 | Apr 1993 | EP | |||
0 551 523 | Jul 1993 | EP | |||
0 475 315 | Dec 1995 | EP | |||
0 710 993 | May 1996 | EP | |||
4237910 | Jul 1992 | JP | |||
4277410 | Oct 1992 | JP | |||
6162842 | Jun 1994 | JP | |||
6349358 | Dec 1994 | JP | |||
230 404 | May 1991 | NZ | |||
Yoshida et al. "High-Resolution Lattice Images of ErBa2Cu3Ox and Bi2Sr2CaCu2Ox Observed at 4.2 K*". Journal of the Less Common Metals, 151 (1989) 243-248. . Dao et al. "Interface instability in the bulk processing of 2223 BSCCO powders". Philosophical Magazine A, vol. 78 No. 4 (1998) 857-877. . Korzekwa, D.A. et al., "Deformation Processing of Wires and Tapes Using the Oxide-Powder-in-Tube Method," Applied Superconductivity 2(3/4):261-270 (1994). . Lotgering, "Topotactical Reactions with Ferrimagnetic Oxides Having Hexagonal Crystal Structures-I," J. Iorg. Nucl. Chem. 9:113-123 (1959). . Motowidlo, L.R. et al., "Mechanical and Electrical Properties of BSCCO Multifilament Tape Conductors," Presented at Materials Research Society Meeting, San Francisco, CA, Apr. 12-15, 1993. . Sandhage, K.H. et al., "Critical Issues in the OPIT Processing of High-J.sub.c BSCCO Superconductors," JOM 1991:21-25 (1991). . Tenbrink, J. et al., "Development of Technical High-J.sub.c Superconductor Wires and Tapes," Applied Superconductivity Conference, Chicago, IL, Aug. 23-28, 1992. . Korzekwa, D.A. et al. "Deformation Processing of Wires and Tapes Using the Oxide-Powder-in-Tube Method" Applied Superconductivity 2(3/4):261-270 (1994). . Asaro, R.J. et al. "Mechanical Processing of High J.sub.c BSCCO Superconductors" Philosophical Magzine 66(4):517-38 (1992), Preprint available (Dec., 1991). . Li, Q. et al. "Critical Current Density Enhancement in Ag-Sheathed Bi-2223 Superconducting Tapes" Physica C 217:360-366 (1993).. |