| 摘要 |
The invention relates to engineering superconductivity, in particular, to a device for and a method of producing wide flat superconductors aimed at manufacturing electrical-engineering products. The method for producing flat superconductors comprises: forming a hollow metallic ampoule, filling the ampoule with superconducting compound or semi-product powder calculated on a basis of the final monofilamentary conductor filling factor of 20-75%, reducing the resultant ampoule-powder system to a thickness of 0.35-5 mm at a reduction ratio of 1-20% per pass, cutting the thus-reduced ampoule-powder system into specified-length component parts, forming a complex billet by placing in a sheath of the complex billet appearing as a hollow section having an oval or rectangular cross-section, a required amount of specified-lengths component parts or of specified-lengths component parts and reinforcing elements calculated on a basis of the final multifilamentary conductor filling factor of 25-70%, reducing the complex billet to the required dimensions at a reduction ratio of 1-18% per pass, and thermomechanical treatment of the billet. The resultant superconductors are comprised of the elements of high-temperature superconducting ceramics put in layers into a sheath, or of the elements of high-temperature superconducting ceramics put in layers into a sheath and of the reinforcing elements placed between the elements of high-temperature superconducting ceramics, the ratio between a total area of the elements of high-temperature superconducting ceramics and a maximum overall dimension is 0.03 m-2 m and 0.03 m-3 m, respectively. A minimum critical current of the resultant flat superconductors having a width of up to 1 m (up to 1.5 m 1.5 m when using the reinforcing elements) is as high as 560 A. The fields of application of the flat superconductors are extended due to an increased width of both short-length and long-length multifilamentary superconductors.
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