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采用MgO单晶与NdBa2Cu3O7-δ(Nd123)粉体的2-2复合体籽晶可以充分利用MgO与NdBCO籽晶的优势,对SmBCO晶体的生长起到了很好的诱导作用,成功制备出单畴SmBCO超导块材.本文采用不同厚度的Nd123片层和MgO单晶作为2-2复合体籽晶通过顶部籽晶熔渗生长工艺(TSIG)制备SmBCO超导块材,研究了Nd123片层的厚度对SmBCO样品生长的影响.结果表明,随着Nd123片层厚度的增加,样品的单畴形貌逐渐消失,并且出现了随机成核.通过对样品的生长特性和微观结构的研究,阐明了不同厚度的Nd123片层对SmBCO晶体生长形貌的影响机制.
The use of 2-2 composite seed crystals of MgO single crystal and NdBa2Cu3O7-δ (Nd123) powder can make full use of the advantages of MgO and NdBCO seed crystals and induce the growth of SmBCO crystal successfully. Single-domain SmBCO superconducting bulk material.In this paper, different thickness of Nd123 lamella and MgO single crystal were used as 2-2 composite seed to fabricate SmBCO superconducting bulk material by top seed infiltration growth process (TSIG) Thickness on the growth of SmBCO samples.The results show that with the increase of the Nd123 lamella thickness, the morphology of the single-domain disappears gradually, and the random nucleation occurs.According to the growth characteristics and microstructure of the samples, Effect of different thickness of Nd123 lamella on the growth morphology of SmBCO crystal.