中国物理B ›› 2019, Vol. 28 ›› Issue (4): 47401-047401.doi: 10.1088/1674-1056/28/4/047401
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
Li-Jun Cui(崔利军), Ping-Xiang Zhang(张平祥), Jin-Shan Li(李金山), Guo Yan(闫果), Yong Feng(冯勇), Xiang-Hong Liu(刘向宏), Jian-Feng Li(李建峰), Xi-Feng Pan(潘熙峰), Fan Yang(杨帆), Sheng-Nan Zhang(张胜楠), Xiao-Bo Ma(马晓波), Guo-Qing Liu(刘国庆)
Li-Jun Cui(崔利军)1,2, Ping-Xiang Zhang(张平祥)1,2,3, Jin-Shan Li(李金山)1, Guo Yan(闫果)2, Yong Feng(冯勇)2, Xiang-Hong Liu(刘向宏)2, Jian-Feng Li(李建峰)2, Xi-Feng Pan(潘熙峰)2, Fan Yang(杨帆)2, Sheng-Nan Zhang(张胜楠)3, Xiao-Bo Ma(马晓波)3, Guo-Qing Liu(刘国庆)3
摘要:
The phase evolution of Bi-2223 precursor powder prepared by spray pyrolysis method is studied with different heat treatment parameters. The results show that the reaction temperature and phase composition of precursor powder depend on heat treatment atmosphere. Phase assemblage of (Bi,Pb)-2212, AEC, CuO, and small Bi-2201 can be obtained by heat-treated in N2-0.1%O2 atmosphere. For precursor powder, there is sufficient reaction process at 770℃, and the dimension of Bi-2212 phase increases rapidly with the increase of heat treatment temperature and time. The dimension of AEC phase also increases by extending heat treatment time. As a balance among phase assemblage, dimension of particle and adequate reaction, a reasonable precursor powder can be obtained by heat-treated at 770℃ for 12 h-16 h in N2-0.1%O2 atmosphere. Critical current of 37-filament Bi-2223 tape is about 120 A, which confirms that these heat treatment parameters are reasonable.
中图分类号: (Transport properties)