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REO1 .5 BaO CuOx 系统的氧化物超导体从材料成分的角度 ,可分为REBa2 Cu3 O7-δ化合物(如YBa2 Cu3 O7-δ,简称YBCO或Y1 2 3)和RE1 +xBa2 -xCu3 O7-δ固溶体 (如Nd1 +xBa2 -xCu3 O7-δ和Sm1 +xBa2 -xCu3 O7-δ,简称NdBCOss和SmBCOss) .YBCO超导材料非常容易获得精确化学计量比的 1 2 3成分 .而后者 ,作为固溶体材料的NdBCOss和SmBCOss,成分、结构和性能完全取决于晶体生长的热力学参数 .本研究通过提拉法研制REBa2 Cu3 O7-δ单晶体 ,并结合REO1 .5 BaO CuOx 系统的三元相图特征 ,讨论REBa2 Cu3 O7-δ单晶体生长中的成分、结构和性能的控制 .
The oxide superconductors of the REO1 .5 BaO CuOx system can be classified into REBa2 Cu3 O7-δ compounds (such as YBa2 Cu3 O7-δ, YBCO or Y1 2 3 for short) and RE1 + xBa2-xCu3 O7-δ solid solutions (Such as Nd1 + xBa2-xCu3O7-δ and Sm1 + xBa2-xCu3O7-δ, referred to as NdBCOss and SmBCOss) .The YBCO superconducting material is very easy to obtain the exact stoichiometric composition of 123. The latter, as a solid solution material NdBCOss and SmBCOss, composition, structure and properties depend entirely on the thermodynamic parameters of crystal growth.In this study, the REBa2 Cu3 O7-δ single crystal was prepared by the Czochralski method and the ternary phase diagram of REO1.5 BaO CuOx system was discussed to discuss the REBa2 Cu3 Composition, Structure and Property Control of O7-δ Single Crystal Growth.