Effect of Various C Sources Co-doping on Transport Critical Current Density and Grains-connectivity of MgB2/Fe Tapes
In this paper,we have prepared a series of Fe sheathed MgB2 tapes with SiC,Malic acid and C9H11NO mono- and co- doping by in-situ powder-in-tube (PIT) method,and studied the effects of various C sources co-doping on transport critical current density and flux pinning of MgB2/Fe tapes.The results suggest by various C sources co-doping,the amount of C substitution for boron largely increase,comparing to SiC,Malic acid or C9H11NO mono-doped sample.For MgB2/Fe tapes with 5 mol% SiC+10 wt% Malic acid and 4 wt% C9H11NO+10 wt% Malic acid co-doping,the transport Jc at 4.2 K and 10 T are 14.8 and 13.5 kA/cm2,respectively,which are clearly higher than the Jc of these dopants mono-doped samples.Furthermore,it is found that at the 4 wt.% C9H11NO doped MgB2,the poor in-field Jc should be attributing to the cracks at grains boundary,which results in the bad grains-connectivity.
MgB2 Critical current density Flux pinning Co-doping Grains-connectivity
Xifeng Pan Guo Yan Xianghong Liu Yong Feng Pingxiang Zhang Yong Zhao Akiyoshi Mastumoto Hiroshi Kumakura
Key Laboratory of Magnetic Levitation Technologies and Maglev Trains, Superconductivity and New ener National engineering laboratory for superconducting materials, Western Superconducting Technologies National Institute for Materials Science, Superconducting Materials Center, 1-2-1, Sengen,Tsukuba, I
国际会议
the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))
太原
英文
214-218
2012-07-13（万方平台首次上网日期，不代表论文的发表时间）