摘要
该文研究了名义成分为Bi_2Sr_2CaCu_(1.2)Li_(0.8)O_x材料的处理工艺与超导性能之间的关系。我们发现烧结温度对样品超导性能及晶粒尺寸都有明显影响,通过优化热处理工艺,我们得到了零电阻温度为92K的超导样品。X射线衍射及样品T_C测量的实验结果表明,Li的加入,抑制了2223相的形成,并提高了2212相的T_C。该文还就冷却速度对样品性能的影响进行了研究。
The effects of the heat treatment on some properties of Li-doped BS-CCO(Bi2Sr2CaCu1.2Li0.8Ox) material have been. investigated in this p-aper. It has been found that the sintering temperature has great influence on the superconducting properties and the grain size. A Tc with z-ero resistance of about 92K can be obtained by a optimized heat treatment. X-ray diffraction analysis and AC magnetic susceptibility measurements show that the Li addition could depress the formation of 2223 phase. The influence of the cooling rate is also discussed.
出处
《低温与超导》
CAS
CSCD
北大核心
1991年第4期15-19,共5页
Cryogenics and Superconductivity
