【摘要】 用液相烧结法研究了制备名义组成（123+211）织构的YBa₂Cu₃O_7-x超导体在123(YBa₂Cu₃O_7-x)粉中掺适量的211（Y₂BaCuO₅）粉消除BaCuO₂在晶界上沉积在包晶转变温度附近降低冷却速率允许有足够时间沿a—b面进行质量转移,a—b面是最快的生长面,晶粒长度受质量转移速率控制XRD,SEM,EDXA分析指出,晶粒是长条形,取向垂直于c轴,平行于表面样品123具有强织构更多还原

【Abstract】 To eliminate the deposition along BaCuO₂ grain boundaries, the 211（Y₂Ba₂CuO₅） powder was properly doped to the 123 (YBa₂Cu₃O_7-x compounds. Sufficienttime for mass transfer along a-b plane was allowed by lowering the cooling rate nearby thetemperature of peritectic transformation. Since the plane a-b is the fastest growing one, thelength of grains is controlled by the rate of mass transfer. XRD, SEM and EDXA analysesrevealed that the grains are strip-shaped, their orientation is perpendicular to c-axis and par-allel to surface a-b plane. Thus, the compound 123 (YBa₂Cu₃O_7-x has a strong texturalstructure.更多还原