一维热传播模型下高温超导带的失超特性研究  

Quench propagation in HTS tapes in 1D heat propagation model

作　　者：孔令启[1] 李晓航[1] 杜晓纪[1] 张正臣[1] 周微微[1] 杨晓乐[1] 叶立阳[1] 

机构地区：[1]中国科学院超导重点试验室

出　　处：《低温与超导》2008年第2期19-23,共5页Cryogenics and Superconductivity

基　　金：国家自然科学基金项目(50777063)支持

摘　　要：对Bi-2223/Ag高温超导带材的失超传播特性进行了研究。测量了Bi-2223/Ag带材在有绝缘材料包裹和液氮浸泡环境下的电压变化曲线,同时利用一维热流方程模型,模拟出超导体失超传播过程中由超导态过渡到正常态的温度变化行为,同时还对传输电流和触发能量对失超传播速度的影响进行了实验研究。这些工作对高温超导磁体及电力系统的应用有着重要的参考价值。The quench propagation characteristics in HTS Bi -2223/Ag tapes have been studied in this paper. The time dependence of voltage of Bi - 2223/Ag tapes with insulating sheath materials were measured in liquid nitrogen immersion. The temperature transition behaviors from superconducting - state to normal - state in quench propagation process have been simulated by using one -dimensional heat flow equation model. In addition, the influences on quench propagation velocity by transport current and trigger energy have also been studied, These results are significant to the applications of high temperature superconducting magnets and electric power systems.

关 键 词：失超传播 BI-2223/AG带材 最小失超能 

分 类 号：TM26[一般工业技术—材料科学与工程] TN011[电气工程—电工理论与新技术]