论文信息 - Carbohydrate doping to enhance electromagnetic properties of MgB2 superconductors

Carbohydrate doping to enhance electromagnetic properties of MgB2 superconductors

The effect of carbohydrate doping on lattice parameters, microstructure, Tc, Jc, Hirr, and Hc2 of MgB2 has been studied. In this work the authors used malic acid as an example of carbohydrates as an additive to MgB2. The advantages of carbohydrate doping include homogeneous mixing of precursor powders, avoidance of expansive nanoadditives, production of highly reactive C, and significant enhancement in Jc, Hirr, and Hc2 of MgB2, compared to undoped samples. The Jc for MgB2+30wt% C4H6O5 sample was increased by a factor of 21 at 5K and 8T without degradation of self-field Jc.

[1] Hot isostatic pressing of powder in tube MgB2 wires , 2003, cond-mat/0303043.

[2] K. Kishio,et al. Effects of B4C doping on critical current properties of MgB2 superconductor , 2005 .

[3] Australia.,et al. Enhancement of the critical current density and flux pinning of MgB2 superconductor by nanoparticle SiC doping , 2002, cond-mat/0207223.

[4] Enhancement of the high-magnetic-field critical current density of superconducting MgB2 by proton irradiation , 2001, Nature.

[5] H. Kitaguchi,et al. Effect of aromatic hydrocarbon addition on in situ powder-in-tube processed MgB2 tapes , 2005, cond-mat/0509086.

[6] H. Hatakeyama,et al. Upper critical fields of powder-in-tube-processed MgB2/Fe tape conductors , 2004 .

[7] The doping effect of multiwall carbon nanotube on MgB2∕Fe superconductor wire , 2006, cond-mat/0603566.

[8] H. Suo,et al. Superconducting properties of MgB2 tapes and wires , 2003 .

[9] J. Nagamatsu,et al. Superconductivity at 39 K in magnesium diboride , 2001, Nature.