The trifluoroacetate metal-organic deposition (TFA-MOD) is one of the most appealing routes for the growth of high-quality YBa₂Cu₃O_7-δ (YBCO) coated conductors (CCs) due to its advantages of low cost and high efficiency. However, the puzzle of the inhomogeneities in microstructures and superconducting properties of YBCO CCs prepared based on the TFA-MOD route remain still a challenge. In this paper, 10 cm long YBCO films were prepared under different low-pressure conditions. These YBCO films were deposited on buffered Hastelloy C276 tapes using a dip coater. The effect of different ambient pressures on the microstructure and critical current density of YBCO films was investigated. High critical current density (J_C) YBCO coated conductors with good homogeneity were obtained. The J_C values (77 K, self-field) at different positions along the length direction of YBCO coated conductor were around 3.5–4 MA/cm². The results showed that only under a suitable pressure the homogeneities of the microstructure and critical current density along the length direction of coated conductor can be greatly improved. The improvement was mainly ascribed to good texture and the absence of impurity phases BaF₂ and Ba₄Y₂O₇ in the films.

三氟乙金属有机沉积（TFA-MOD）是高品质的YBa生长的最吸引人的途径之一₂的Cu ₃ ö _7-δ（YBCO）涂覆的导体（CCS）由于成本低和高的它的优点效率。然而，基于TFA-MOD路线制备的YBCO CC的微观结构不均匀和超导特性的难题仍然是一个挑战。本文在不同的低压条件下制备了10 cm长的YBCO薄膜。使用浸涂机将这些YBCO薄膜沉积在缓冲的Hastelloy C276胶带上。研究了不同环境压力对YBCO薄膜的微观结构和临界电流密度的影响。高临界电流密度（J _C获得了具有良好均匀性的YBCO涂层导体。沿YBCO涂层导体的长度方向在不同位置的J _C值（77 K，自磁场）约为3.5–4 MA / cm ²。结果表明，只有在适当的压力下，沿涂层导体长度方向的微观结构的均匀性和临界电流密度才能大大提高。该改善主要归因于良好的织构和膜中不存在杂质相BaF ₂和Ba ₄ Y ₂ O ₇。