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将 YBCO 固相烧结坯料在高于1050℃温度下进行液相烧结,再在123相形成区域内缓冷,定向凝固,最后进行氧化处理。微观组织不同于传统的固相烧结样品,成分均匀的大尺寸的片状晶择优取向生长并以层状分布,定向生长的 YBCO 体材经氧化处理后孪晶密度明显提高,观察出大量的位错线。其性能在0场下大幅度提高。在77K、OT 下 J_c 大于2×10~4A/cm~2。在磁场下,下降幅度明显减少,H=1T,J_c≥6600A/cm~2;H=2T,J_c≥5800A/cm~2;H=5T,J_c≥3600A/cm~2。
The YBCO solid-phase sintered billet is liquid-phase sintered at a temperature higher than 1050 DEG C, then slowly cooled in the 123-phase forming region, and is directionally solidified, and finally is oxidized. Microstructure is different from the traditional solid-phase sintered samples. Large-sized sheet-like crystals with uniform composition preferred to grow and distribute in layers. The density of twinned crystals of YBCO with directional growth obviously increased after oxidation treatment. A large number of bits Wrong line. Its performance is greatly improved in 0 games. At 77K, J_c is greater than 2 × 10 ~ 4A / cm ~ 2 under OT. Under the magnetic field, the decrease range is obviously reduced. H = 1T, J_c≥6600A / cm ~ 2; H = 2T, J_c≥5800A / cm ~ 2; H = 5T, J_c≥3600A / cm ~ 2.