发明名称 |
PROCESS FOR MANUFACTURING WIRE OR STRIP FROM HIGH-TEMPERATURE SUPERCONDUCTORS AND SHEATHS USED FOR IMPLEMENTING SAID PROCESS |
摘要 |
<p>PCT No. PCT/DE88/00763 Sec. 371 Date Jun. 11, 1990 Sec. 102(e) Date Jun. 11, 1990 PCT Filed Dec. 13, 1988 PCT Pub. No. WO89/06053 PCT Pub. Date Jun. 29, 1989.In a known process, oxide powders derived from the four-component systems yttrium-barium-copper-oxygen or lanthanum-strontium-copper-oxygen are mixed, pressed, sintered, ground and then heat-treated to produce a superconducting material which can be shaped to the desired cross-section. According to the invention, the powder is compacted by isostatic pressing and the blank so obtained is extruded at a temperature>/=500 DEG C. to form a metallic sheath with a deformation ratio of at least 50%. The extruded blank is then converted to wire or strip. The current-carrying capacity of the high-temperature superconductor is improved by the extrusion and the resulting alignment of the crystallites. The process can be implemented using known high-temperatures superconducting material.</p> |
申请公布号 |
EP0396581(B1) |
申请公布日期 |
1992.01.15 |
申请号 |
EP19890900190 |
申请日期 |
1988.12.13 |
申请人 |
SIEMENS AKTIENGESELLSCHAFT |
发明人 |
GUNZELMANN, KARL-HEINZ;MUELLER, REINER;HERKERT, WERNER;GROSSE, JOACHIM;TIEFEL, GUENTER |
分类号 |
B21F19/00;B30B11/00;B30B11/22;C04B35/45;C04B35/645;H01B12/04;H01B13/00;H01L39/24 |
主分类号 |
B21F19/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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