Abstract
We investigated the microstructure and superconducting properties of the Nd–Ba–Cu–O with 0–1.0 wt.% ZrO 2 and 0–2.24 wt.% BaZrO 3 synthesized by the oxygen-controlled melt-growth process in 1% O 2–Ar atmosphere. The microstructure of Zr-added NdBCO was not homogeneous, and one could observe the segregation of Nd422 particles, the residual liquid phase including the agglomeration of BaZrO 3 particles and the Nd422-free regions. Such inhomogeneity is caused by the strong influence of BaZrO 3 on the solid/liquid interfacial energy during the melt growth.
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