In this work, two groups of single domain YBCO grains with c-axis perpendicular (Pe-Y123) and parallel (Pa-Y123) to the top surface, were fabricated by the RE + 011 TSIG method under different supercooling temperature (ΔT). The effect of ΔT on the a-axis and c-axis growth rates on the surface (R_as and R_cs) and interior part (R_ai and R_ci) of YBCO grains were systemically investigated, and the magnetic levitation properties of single domain YBCO bulk superconductors were studied. The results indicated that the top surface morphology exhibits square shape for Pe-Y123 group bulks and rectangular shape for Pa-Y123 group bulks. All growth rates increase nearly linear with the rising ΔT. R_as and R_cs are greater than the R_ai and R_ci, respectively. Both R_cs and R_ci are greater than R_as and R_ai under the same ΔT. Pe-Y123 superconductor is of greater levitation force, while Pa-Y123 superconductor is of relatively higher guidance force. These results are very helpful for understanding the crystal growth difference between the surface and internal of the single domain YBCO bulks, and provide a new way to fabricate REBCO bulks with designed grain orientation for different applications.

在这项工作中，通过RE + 011 TSIG方法在不同的过冷温度（ΔT）下制备了两组c轴垂直（Pe-Y123）和平行（Pa-Y123）顶面的单畴YBCO晶粒。系统研究了ΔT对YBCO晶粒表面（R _as和R _cs）和内部（R _ai和R _ci）_a轴和c轴生长速率的影响，以及单畴的磁悬浮特性研究了 YBCO 体超导体。结果表明，Pe-Y123 基团块体的顶面形态为方形，Pa-Y123 基团块体的顶面形态为矩形。所有增长率几乎都随着 ΔT 的增加呈线性增加。R _as和 R _cs分别大于R _ai和R _ci。在相同的ΔT下，R _cs和R _ci都大于R _as和R _ai。Pe-Y123超导体具有较大的悬浮力，而Pa-Y123超导体具有相对较高的导向力。这些结果对于理解单畴 YBCO 块体表面和内部晶体生长的差异非常有帮助，并为制造具有设计晶粒取向的 REBCO 块体提供了一种新方法，以用于不同的应用。