Single grain (Gd, Dy)BCO bulks were fabricated via cold-top-seeded infiltration growth process in air. Microstructural observations clarified that the size and dispersion of embedded (Gd, Dy)₂BaCuO₅ (211) secondary phase particles strongly varied in dependence of the grain refiners. The combined addition of Pt and CeO₂ in each amount of 0.2 wt% increased the critical current density (J_c^ab, B‖c-axis) to 10⁵ A/cm² at 77 K and self-field. The microstructural and magnetic properties of Pt and CeO₂ doped sample exhibited high homogeneity throughout the bulk sample. The optimum amount of Dy-211 is added to GdBCO along with Pt and CeO₂ resulted in highest superconducting J_c^ab of 72 kA/cm² at an applied magnetic field of 2.2 T with improved flux pinning which is confirmed by high values of the reduced fields (h_max = H_a/H_irr).

单粒（Gd，Dy）BCO块是通过在空气中冷顶播种的渗透生长过程制成的。微观结构观察表明，嵌入的（Gd，Dy）₂ BaCuO ₅（211）次级相颗粒的大小和分散度根据晶粒细化剂的不同而有很大差异。将合并的加入Pt的CeO和的₂中的0.2％（重量）的每个增加量的临界电流密度（Ĵ _Ç ^AB，乙‖ Ç轴）至10 ⁵ A /厘米²在77K和自场。Pt和CeO ₂的微观结构和磁性掺杂样品在整个样品中均表现出高均质性。Dy-211的最佳添加量与Pt和CeO ₂一起添加到GdBCO中，在2.2 T的施加磁场下产生的最高超导J _c ^ab为72 kA / cm ²，并且通量钉扎得到改善，这可以通过以下方法来确定：缩小场（h _max  = H _a / H _irr）。