摘要
应用固态反应法,制备了Ca掺杂的Y1-xCaxBa2Cu3O7-δ(x=0、0.1、0.2、0.3)超导粉体及超导块体。主要研究了Ca掺杂对Y1-xCaxBa2Cu3O7-δ超导体显微结构及捕获磁通能力的影响。结果表明,掺Ca量为x=0.2的Y1-xCaxBa2Cu3O7-δ超导体,晶粒进一步长大呈棒状,晶粒尺寸在15 um左右,各晶粒间紧密结合,晶界尤为明显;其捕获磁场的峰值随外加磁场的增大而变化的幅度最小,这表明合适的摻Ca量为x=0.2。本实验对制备高临界电流密度Jc的YBa2Cu3O7-δ超导体具有重要意义。
The solid - state reaction method （ sintering process） is used for preparing the synthesis of Ca - dope- dY1-xCaxBa2Cu3O7-δpowders and bulk superconductors. The influence of Ca -doping on microstructure and trapped magnetic flux of Y1-xCaxBa2Cu3O7-δis investigated. It is found that the club -shaped grains are formed for the Y1-xCaxBa2Cu3O7-δ superconductor with Ca quantity x =0. 2. The grain size is about 15um and all the grains are well linked. The grain boundary is especially clear and the maximum trapped magnetic field changes slowly while the pulsed magnetic field changes. So the reasonable Ca doping content is around x = 0. 2.
出处
《空军工程大学学报（自然科学版）》
CSCD
北大核心
2011年第5期91-94,共4页
Journal of Air Force Engineering University(Natural Science Edition)
基金
教育部重点科研基金资助项目(105154)
