【摘要】 Bi-Sr-Ca-Cu-O系中掺入适量的Sb,其高温相（110K相）含量明显多于不掺Sb样品。Sb具有加速高温相形成的作用。对于各义组分为Bi_2-xSb_xSr₂Ca_2.5Cu_3.7O_y的样品,x=0.1最有利于高温相的形成。用液氮中淬火后低温回火的方法,发现在865℃烧结时样品中首先形成的是低温相（80K相）,然后再逐渐转变为高温相。T_c值随烧结时间的延长而增大。如在低于865℃的温度下退火,高温相又可转变为低温相。据此,我们用高温长时间烧结后快速降温,用较低温度下退火的办法制成零电阻温度为113K的高T_c单相超导材料。更多还原

【Abstract】 In the samples of Sb proper doping Bi-Sr-Ca-Cu-O system, the content of the high temperature phase (110K phase) is obviously much higher than that of the Sb-free samples’. Sb has a function of accelerating the formation of the high Tc phase. For the nominal composition of Bi2-x Sb_x Sr2 Ca2.5 Cu3.7 Oy x = 0.1 is most beneficial to the formation of the high T_c phase, After quenching in liquid nitrogen and annealing at low teperatures, it is found that the low Tc phase (80K phase) is firstly formed when the samples are sintered at 865℃, then the low T_c phase changes to the high Tc phase, until all materials become the high T_c phase eventually. The value of Tc increases continuously with time lasting. If annealed at lower em-perature, the high Tc phase will change to the low Tc phase. Based on this discovering, after sintering at high temperature, for a long time, fast cooling to a low temperature, annealing for some time, then naturally cooling to room temperature, we have successfully prepared the high Tc single phase superconductor with zero resistance temperature 113K.更多还原