| 摘要 |
The present invention relates to an pre-product (1) for producing a strip-like high-temperature superconductor (HTS), comprising a metallic strip-like substrate (10) which has a first strip side (11) and a second strip side (12), wherein on the first strip side (11) (a) the substrate (10) has a predefined texture as a template for a crystallographically oriented growth of a buffer layer or an HTS layer and (b) there is an exposed surface of the substrate (10) or there are one or more layers (20, 30) which are chosen from the group consisting of: buffer precursor layer, pyrolyzed buffer precursor layer, buffer layer, HTS precursor layer, pyrolyzed HTS buffer precursor layer and pyrolyzed and further compressed HTS buffer precursor layer, and on the second strip side (12) there is at least one ceramic barrier layer (40) protecting the substrate (10) from oxidation or a precursor which transforms into such during HTS crystallization annealing or pyrolysis, wherein if on the first strip side (11) there are one or more layers (20, 30), the ceramic barrier layer (40) or precursor thereof has a chemical composition and/or a texture different from those of the layer (20) on the first strip side (11) immediately adjacent to the substrate (10). In this case, the barrier layer (40) is a layer which is made of conductive ceramic material and delays or hinders the access of oxygen to the second strip side (12) or a precursor which transforms into such during HTS crystallization annealing or pyrolysis and the ceramic material is an electrically conductive metal oxide or an electrically conductive mixture of metal oxides, wherein the conductive metal oxide or one or more metal oxides in the conductive mixture is preferably a metal oxide doped with a foreign metal. |
