我国蕴藏着丰富的稀土元素,利用镧代替钇,研究高T_c超导体具有一定的经济意义。但镧和钡的原子半径相近而比钇大得多,这给制备工作带来了困难。国内曾有几个单位制备出了T_c80K的超导相,但都难以重复。日本A.Maeda等人合成了T_c80K的正交LaBa_2Cu_3O_(7-δ)超导相,测定了晶体结构和相转变温度。最近我们也开展了对这个体系的研究,本文将给出隐定的高T_cLaBa_2Cu_3O_(7-δ)超导相的制备方法、相变温度、晶体结构以及超导性能与正交性的关系。 Our country is rich in rare earth elements, the use of lanthanum instead of yttrium, high T_c superconductor has some economic significance. However, the atomic radii of lanthanum and barium are similar but much larger than that of yttrium, which poses difficulties for preparation. Several domestic units have prepared a superconducting phase T_c80K, but are difficult to repeat. Japan A. Maeda et al synthesized T_c80K orthorhombic LaBa_2Cu_3O_ (7-δ) superconducting phase and measured the crystal structure and phase transition temperature. Recently, we also carried out the research on this system. In this paper, we will present the relationship between the fabrication method, phase transition temperature, crystal structure, superconductivity and orthogonality of the superconducting high TcLaBa2Cu3O7 (7-δ).