【摘要】 研究了主组成及少量外加物对Y_xBa_1-xCuO₃系超导陶瓷导电性与超导电性的影响.研究表明,当配料组成Y∶Ba≈1∶2时最容易制取稳定的、零电阻为88K以上的高临界温度T_c的超导材料;采用Bi、Pb、Na、Co等对阳离子进行部分替位更换,仍能获得超导特性,但对T_c值没有改进;少量外加物对YBa₂Cu₃O_7-δ系超导陶瓷的T_c值有明显的影响,微量钴离子的掺入可使T_c提高到110K,但掺入量较多时反使T_c降低.更多还原

【Abstract】 The effect of majority of compositions and small amount of additivs on The properties of(Y_xBa_1-x)CuO₃ system superconducting ceramics has been stu- died.It shows that high T_c superconducting ceramics,with T_co>88K,can be fabricated in Y:Ba≈1:2.When Y,Ba,Cu are substituted by Ce or Na,Pb,Co, respectively,the superconducting behaviors of the materials are kept.Small amount of ion additives（nitrate of Ba,Bi,Fe,Na,Co,Li and pb）exhibit important influence on T_c of the superconducting ceramics.A tract of cobalt ion additive can increace T_co up to 110K,but a little more of the additive can make T_c of the superconducting ceramics decrease.更多还原