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采用粉末熔化处理（ＰＭＰ）法制备了一系列元素替代体系的Ｙ１－ｘＬｎｘＢａ２Ｃｕ３Ｏｙ（Ｌｎ＝Ｈｏ，Ｅｒ或Ｇｄ）及ＹＢａ２Ｃｕ３－ｘＳｎｘＯｙ超导体，系统地研究了体系的熔化温度、临界温度、微观结构和磁通钉扎特性等随元素替代量的变化。发现添加Ｈｏ、Ｅｒ或Ｇｄ部分替代Ｙ能提高体系的临界电流密度Ｊｃ，使钉扎势有所增加，其原因除了２１１粒子细化之外，样品中存在的磁性钉扎和应力钉扎也十分重要。此外，在ＰＭＰ掺Ｈｏ的ＹＢＣＯ中有大量的集合式楼梯状的堆垛层错，这种层错是ＹＢＣＯ中强有力的钉扎中心。对掺Ｓｎ样品的研究表明，Ｓｎ部分替代Ｃｕ能减小２１１粒子尺寸，提高Ｊｃ，增强样品的钉扎能力。
A series of Y1-xLnxBa2Cu3Oy (Ln = Ho, Er or Gd) and YBa2Cu3-xSnxOy superconductors were prepared by powder melting process (PMP). The melting temperature, critical temperature, microstructure and magnetic Through pinning characteristics with the amount of elemental changes. It is found that the addition of Ho, Er or Gd partially replaced by Y can increase the critical current density Jc of the system, resulting in an increase in pinning potential. The reason for this is that in addition to the grain refinement of 211, the magnetic pinning and stress pinning in the sample are very important. In addition, there is a large number of collective stair-like stacking faults in PMP-doped YBCO, which is a strong pinning center in YBCO. Studies on Sn-doped samples show that the partial substitution of Sn for Sn can reduce the size of 211 particles, increase Jc and enhance the pinning ability of the samples.