It is important to understand the coarsening behavior of the Y2BaCuO5 phase particles in Ba-Cu-O melts, since the particle-size distribution of the Y2BaCuO5 particles entrapped in the YBa2Cu3Ox superconducting phase largely affect the superconducting properties. In this paper, we have investigated the dependence of the volume fractions of the high-temperature stable phase Y2BaCuO5 particles in the Ba-Cu-O melt on the coarsening behavior. Consequently, it was found that the coarsening rate constants between the volume fraction of Vf=10-15% and Vf=20-30% were significantly different. Furthermore, the particle-size-distributions for the Vf=20 and 30%, were investigated and discussed.
