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物理学报. 1991, 40(11): 1869-1874.
doi: 10.7498/aps.40.1869.
含Sb的Bi系超导体的研究
- 收稿日期: 1990-12-03
- 刊出日期: 2005-06-28
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Bi2-xSbxSr2Ca2.5Cu3.7Oy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。Tc值随烧结时间的延
English Abstract
STUDY ON Sb-DOPED Bi SYSTEM SUPERCONDUCTOR
- Received Date:
03 December 1990
- Published Online:
28 June 2005
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-xSbxSr2Ca2.5Cu3.7Oy x = 0.1 is most beneficial to the formation of the high Tc 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 Tc phase changes to the high Tc phase, until all materials become the high Tc 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.
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