Claims
- 1. A method of preparing an oxide superconducting wire, comprising the steps of:
- filling up a metal billet with raw material powder for an oxide superconductor;
- degassing said metal billet;
- sealing said degassed metal billet;
- applying hydrostatic extrusion on said sealed metal billet;
- deformation processing said extruded metal billet to elongate said extruded metal billet; and
- heat treating the extruded metal billet for sintering said raw material powder to form the oxide superconductor.
- 2. A method of preparing an oxide superconducting wire in accordance with claim 1, wherein at least the inner surface of said billet is made of silver.
- 3. A method of preparing an oxide superconducting wire in accordance with claim 2, wherein said metal billet is made of silver.
- 4. A method of preparing an oxide superconducting wire in accordance with claim 1, wherein said step of applying hydrostatic extrusion comprises a step of heating said metal billet at a temperature of not more than 600.degree. C.
- 5. A method of preparing an oxide superconducting wire in accordance with claim 4, wherein said step of applying hydrostatic extrusion comprises a step of heating said metal billet at a temperarature in a range from about room temperature to about 400.degree. C.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3-56685 |
Mar 1991 |
JPX |
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Parent Case Info
This is a continuation, of application Ser. No. 07/854,127 filed Mar. 19, 1992, now U.S. Pat. No. 5,369,088.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
5145835 |
Takeshita et al. |
Sep 1992 |
|
5206211 |
Meyer |
Apr 1993 |
|
Foreign Referenced Citations (4)
Number |
Date |
Country |
63-271824 |
Nov 1988 |
JPX |
1-138167 |
May 1989 |
JPX |
1-311514 |
Dec 1989 |
JPX |
3-149712 |
Jun 1991 |
JPX |
Non-Patent Literature Citations (1)
Entry |
Matsuda et al., "Superconducting Tape-Shaped Wire by Y.sub.1 Ba.sub.2 Cu.sub.3 O.sub.7-8 with Jc.apprxeq.2000 A/cm.sup.2 ", MRS vol. 99, Nov. 1987, pp. 695-698. |
Continuations (1)
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Number |
Date |
Country |
Parent |
854127 |
Mar 1992 |
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