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自K.A.Müller等人发现氧化物超导体以来,在二年的时间内,寻找更高T_c超导材料的工作在世界范围内发展很快,目前已在Bi-Sr-Ca-Cu-O和Tl-Ba-Ca-Cu-O二个体系中分别获得零电阻转变温度为110K和120K的超导体。相对而言,获得120K的Tl_2Ba_2Ca_2Cu_3O_(10)[简记为TI-2223]超导体要容易一些,我们研究室已经测定了这个超导相的结构。但是Tl_2O_3的高温易挥发性和剧毒性,给Tl系超导体的制备带来了困难,从而限制了达个体
Since the discovery of oxide superconductors by KAMüller et al., In two years, the search for higher Tc superconducting materials has been rapidly developed around the world. At present, the work of Bi-Sr-Ca-Cu-O and Tl- Ba-Ca-Cu-O two systems were obtained zero resistance transition temperature of 110K and 120K of the superconductor. In contrast, it is easier to obtain a 120K Tl_2Ba_2Ca_2Cu_3O_ (10) [abbreviated as TI-2223] superconductor. Our laboratory has determined the structure of this superconducting phase. However, the high temperature of Tl_2O_3 is highly volatile and highly toxic, which makes it difficult to prepare Tl superconductors,