A novel method to fabricate the PMP YBCO samples using Y₂O₃ as the original ingredient instead of Y-211

The Y₂O₃ powder was used as the original ingredient, instead of Y-211 powder, to form the Y-123 phase by the PMP process. The super-conductive properties of this new Y₂O₃-original samples have been investigated. Results reveal that, the precalcination temperature of this kind of samples should not be higher than 700°C to avoid the formation of Y-123 phase, which is much lower than that of the classical PMP samples. The finer Y-211 particles of Y₂O₃-original samples with similar microstructure to the Y-211-original samples cause more pinning-center, which results better conducting behavior. The Jc value of Y₂O₃-o-riginal samples in high field is higher than that of Y-211-original samples, and the anisotropy is restrained remarkably. That means, this novel method is a potential method to improve the super-conductive properties of the PMP samples.