【摘要】 研究了Ba(Y_1-xLax)(Cu_1-yLiy)₂O_6-n系统的陶瓷,测量表明,该材料具有高Tc（90K）,零电阻温度为82K.在Tc以下表现出抗磁性。SEM的观测表明,陶瓷体主要是由2—10μm的长方形晶粒组成。其中还有一些无定形的相成分。X射线衍射结果表明,该超导陶瓷基本上呈现单相结构,属正交系,晶格参数为α=3.895A,b=3.888A和c=11.598A,与没有置换的Ba-Y-Ca-O超导陶瓷作了对比。更多还原

【Abstract】 The compounds with the composition Ba (Y1-xLax) (Cu1-yLiy)2O6-a have been prepared in ceramic form.It has been discovered that this ceramic(x=0.33,y=0.10) exhibits high-Tc superconductivity with Tc ( middle point) of 90K an T of 82K.By SEM analysis,it was shown that the main phase is some rectangle grains with size of 2-10μm.From X-ray powder diffraction,the structure of main phase,which belongs to the orthorhombic crystal class with the latticeparameters of a=3.895A,b = 3.888A,and c = 11.598A at room temperature,was determinated.更多还原