大尺寸YBa_2Cu_3O_(7-δ)超导体的研制

THE PREPARATION OF THE LARGE YBa_2Cu_3O_(7-δ) SUPERCONDUCTOR

利用固相反应法成功地制备了直径为100mm,厚为5mm的大尺寸YBa_2Cu_3O_(7-δ)超导体。在通氧,930℃热处理45min后,超导体的上限转变温度为94K,零电阻温度为92K。x射线衍射进行物相定性,扫描电镜进行形貌和超导电性关系的对比观察。选区电子衍射给出YBa_2Cu_3O_(7-δ)超导体的晶格参数为a=0.348nm,b=0.377nm,c=0.716nm,属于正交晶系。

This paper presents a way to make YBa_2Cu_3O_(7-δ) superconductor, 100mm in diameter, 5mm in depth with solid-state reaction. After heat treament with Oxygen at 930℃ for 45 minutes, the upper transition temperature of the superconductor is 94k and zero resistance temperature is 92K. X-ray diffraction is used for analysing, electronic-microscope scanning is used to observe superconductivity and morphology. The parameters of its selected electronic diffraction of the YBa_2Cu_3O_7(-δ): a=0.348nm, b=0.377nm, c=0.716nm, it is orthorhombic structure.