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采用高温淬火方法制备了Ｔｃ在２７．４Ｋ至９２．４Ｋ之间的一组不同氧含量的ＰＭＰ（粉末熔融工艺）法ＹＢＣＯ超导体。通过对这些超导体样品的磁滞回线及不可逆线的研究发现，随着氧空位的增加，超导体的磁通钉扎力减小
A group of PMP (powder melting process) YBCO superconductors with different oxygen contents with Tc between 27.4K and 92.4K were prepared by high temperature quenching method. By studying the hysteresis loop and the irreversible line of these superconductor samples, it is found that the flux pinning force of the superconductor decreases as the oxygen vacancy increases