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소대화,반점국 明知大學校 産業技術硏究所 1994 産業技術硏究所論文集 Vol.13 No.-
In this paper, by means of adding nonsuperconductive phase silver into YBCO matrix, the superconductivity of Melted Texture Growth(MTG) YBaCuO was improved remarkably. In order to eliminate the crack in the YBCO and the weak link in the grain boundary, Ag contents from 2wt% to 18wt% were doped in the YBCO. It was found that Jc of YBCO increases with the increasing Ag content till 14wt%, over 14wt% of Ag contenr, the Jc tends to stable. The grain size of YBCO became fine when Ag was added in the YBCO and X-ray diffraction showed that the YBCO crystal prepared by the above technique had (001) oriention and growing plane of YBCO was a-b plane. Using Bean´s medel, the Jc was calculated and the best result was Jc = 76000 A/cm²(77K, 100Gs).