DyBa2Cu3O7-x growth on different polycrystalline Dy2O3 interacting layers

We have considered two types of interacting substrates for testing the melt-textured growth of DyBa2Cu3O7-x, i.e., a sintered Dy2O3 or a compacted Dy2O3 powder. Resulting microstructures are compared. Compacted powders are found to provide the most developed 123 grains. Physical and chemical arguments are given for such findings.