TY - JOUR
T1 - Preparation and enhancement of critical current density in MgB2 wires and tapes
AU - Feng, Y.
AU - Yan, G.
AU - Zhao, Y.
AU - Liu, C. F.
AU - Zhang, P. X.
AU - Zhou, L.
AU - Sulpice, A.
AU - Mossang, E.
AU - Hebral, B.
PY - 2004/3/17
Y1 - 2004/3/17
N2 - We have successfully prepared monofilamentary MgB2 wires and tapes with different sheathed metals such as Cu, Ta/Cu and Fe by the powder-in-tube method. The phase composition, superconducting properties and microstructure features are investigated by x-ray diffractometer, the standard four-probe technique, SQUID magnetometer, SEM and TEM. The results indicate that Jc in MgB2/Ta/Cu wires is higher than 105 A cm-2 at 5 K in 0.1 T and 104 A cm-2 at 20 K in 1 T. By Ti-doping, Jc can be significantly improved. MgB2/Fe wires show very high transport critical current densities of 1.43 × 105 A cm-2 (4.2 K, 4 T), 3.72 × 104 A cm-2 (15 K, 4 T) and 2.34 × 104 A cm-2 (25 K, 3 T). Also the results indicated that small grain size should respond to the large Jc in Ti-doped MgB2 tape and MgB2/Fe wire.
AB - We have successfully prepared monofilamentary MgB2 wires and tapes with different sheathed metals such as Cu, Ta/Cu and Fe by the powder-in-tube method. The phase composition, superconducting properties and microstructure features are investigated by x-ray diffractometer, the standard four-probe technique, SQUID magnetometer, SEM and TEM. The results indicate that Jc in MgB2/Ta/Cu wires is higher than 105 A cm-2 at 5 K in 0.1 T and 104 A cm-2 at 20 K in 1 T. By Ti-doping, Jc can be significantly improved. MgB2/Fe wires show very high transport critical current densities of 1.43 × 105 A cm-2 (4.2 K, 4 T), 3.72 × 104 A cm-2 (15 K, 4 T) and 2.34 × 104 A cm-2 (25 K, 3 T). Also the results indicated that small grain size should respond to the large Jc in Ti-doped MgB2 tape and MgB2/Fe wire.
UR - http://www.scopus.com/inward/record.url?scp=1642387566&partnerID=8YFLogxK
U2 - 10.1088/0953-8984/16/10/012
DO - 10.1088/0953-8984/16/10/012
M3 - 文章
AN - SCOPUS:1642387566
SN - 0953-8984
VL - 16
SP - 1803
EP - 1811
JO - Journal of Physics Condensed Matter
JF - Journal of Physics Condensed Matter
IS - 10
ER -