Abstract
This study examined the effects of a side seed on the phase distribution of YSmBaCuO 5 (2 1 1) within Y 0.5Sm 0.5Ba 2Cu 3O 7− x (1 2 3) phases and the superconducting properties of 1 2 3 superconductors. The superconductors were fabricated by infiltration and side-seeded melt-growth (ISSMG) processing. The optimum condition for preparing the 1 2 3 superconductor with well-distributed 2 1 1 phase was obtained when the 2 1 1 to Ba 3Cu 5O 8 (0 3 5) ratio was 1:1.2. The particle size of the 2 1 1 phases was sensitive to the heat-treatment temperature, atmosphere, and crystallographic planes in the 1 2 3 phases at high temperature. The size of the pores and 2 1 1 phases decreased when the fabrication method was changed from a top seed to a side seed, and all the second phase was distributed homogeneously. Overall, the superconducting characteristics of 1 2 3 superconductors were also enhanced by the improved microstructure.
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