고액용융성장법을 이용한 YBCO 단결정 제조

Abstract

YBCO bulks with fine Y2BaCuO5(Y211) particles have been prepared by the top-seed modified powder melting process method, Solid-Liquid Melt Growth(SLMG), with Y2O3, BaCuO2 and CuO mixing precursor. By using Y2O3 instead of Y2BaCuO5 as precursor, the processing became to be simpler and cheaper than the current powder melting process. The microstructures, trapped field and critical current density of the various conditioned YBCO bulks have been analyzed and the effect of Pt additive was studied. The different trapped magnetic field values of the several samples have been explained in the viewpoint of their microstructures. The fabrication of large-sized YBCO single domain has been conducted.