半熔化法制备Tl—1223超导体及冷加工对其超导带的影响  

Preparation Of Tl-1223 And Effect Of Cold Word On Its Silver Sheathed Tape

作　　者：周思海[1] 彭获田 彭秋云[1] 刘向东 

机构地区：[1]长沙矿冶研究院

出　　处：《低温与超导》1995年第1期33-37,共5页Cryogenics and Superconductivity

摘　　要：该文研究了制备Ｔｌ—１２２３超导体的半熔融方法及冷加工对其复银带的影响，与一次烧结法相比较，半熔融法制备的样品杂相较少。通过对差热曲线和磁滞回线的综合分析，认为半熔化温度在９８３℃附近比较合适。在带材制备过程中，冷拉以后不退火直接轧制，采用大的道次压下量，均有利于提高临界电流。各种不同直径的复合丝轧制成的超导带，都有一临界电流最高的厚度范围。Partial melt method of preparing Tl-1223 superconductor and the effect of cold working on properties of its silver sheathed tape was investigated. Sample made by partial melt method has less impurity than that made by sintering method. Analysising of samples’ M-H curve and size of grain indicated that 985℃ is suit for partial melting temperature.During preparing silve sheathed tape, rolling after cold drawing without annealing、adopting large draught perpass were both benefit improving Jc. To the tapes made from composit silk with different diameter, there is a thickness range in which Jc is higher.

关 键 词：半熔化法 Tl-1223超导体 冷加工 超导带 

分 类 号：TM261[一般工业技术—材料科学与工程] O511.2[电气工程—电工理论与新技术]