Comparison of SiC and/or toluene additives to the critical current density of internal Mg diffusion-processed MgB2 wires

2013 ◽  
Vol 484 ◽  
pp. 167-170 ◽  
Author(s):  
S.J. Ye ◽  
M. Song ◽  
A. Matsumoto ◽  
K. Togano ◽  
M. Takeguchi ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Mgb2 Wires

Effects of ZrH2 doping and sintering temperature on the critical current density of MgB2 wires

2005 ◽  
Vol 426-431 ◽  
pp. 1244-1248
Author(s):  
H.L. Xu ◽  
Y. Feng ◽  
Z. Xu ◽  
C.S. Li ◽  
G. Yan ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Sintering Temperature ◽  
Mgb2 Wires

Studies on Development of MgB2 Superconductor with Improved In-Field Critical Current Density

2010 ◽  
Vol 117 ◽  
pp. 63-68 ◽  
Author(s):  
Krishnankutty Vinod ◽  
Syamaprasad Upendran
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Natural Material ◽  
Bulk Superconductor ◽  
Mgb2 Wires ◽  
Heating Method ◽  
Self Heating ◽  
Critical Current Density Jc ◽  
Powder In Tube

The present study focuses on the preparation of good quality MgB2 superconductor in bulk, wire/tape forms and on the improvement of in-field critical current density [JC(H)]. MgB2 bulk superconductor was prepared by a simple Powder-In-Sealed-Tube (PIST) method and MgB2 wires and tapes were prepared by the Powder-In-Tube (PIT) method. A novel electrical self-heating method was introduced for the preparation of Fe sheathed MgB2 wires and tapes. Burned Rice Husk (BRH), an inexpensive natural material is found to be one of the best additives for enhancing the in-field critical current density of MgB2. By selecting suitable combinations of additives a significant enhancement of the critical current density by 1-2 orders of magnitude were achieved for fields > 5 T, at 5-15 K.

Critical current density and pinning behaviour of mono-core MgB2 wires prepared by internal magnesium diffusion and in-situ powder-in-tube method

2014 ◽  
Vol 505 ◽  
pp. 39-43 ◽  
Author(s):  
Boris Brunner ◽  
Pavol Kováč ◽  
Michael Reissner ◽  
Imrich Hušek ◽  
Tibor Melišek ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Mgb2 Wires ◽  
Powder In Tube

scholarly journals Effect of Heat Treatments under High Isostatic Pressure on the Transport Critical Current Density at 4.2 K and 20 K in Doped and Undoped MgB2 Wires

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5152
Author(s):  
Daniel Gajda ◽  
Andrzej J. Zaleski ◽  
Andrzej J. Morawski ◽  
Malgorzata Małecka ◽  
Konstantin Nenkov ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Solid State ◽  
Thermal Treatment ◽  
Magnetic Fields ◽  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Solid State Reaction ◽  
Transport Critical Current Density ◽  
Mgb2 Wires

Annealing undoped MgB2 wires under high isostatic pressure (HIP) increases transport critical current density (Jtc) by 10% at 4.2 K in range magnetic fields from 4 T to 12 T and significantly increases Jtc by 25% in range magnetic fields from 2 T to 4 T and does not increase Jtc above 4 T at 20 K. Further research shows that a large amount of 10% SiC admixture and thermal treatment under a high isostatic pressure of 1 GPa significantly increases the Jtc by 40% at 4.2 K in magnetic fields above 6 T and reduces Jtc by one order at 20 K in MgB2 wires. Additionally, our research showed that heat treatment under high isostatic pressure is more evident in wires with smaller diameters, as it greatly increases the density of MgB2 material and the number of connections between grains compared to MgB2 wires with larger diameters, but only during the Mg solid-state reaction. In addition, our study indicates that smaller wire diameters and high isostatic pressure do not lead to a higher density of MgB2 material and more connections between grains during the liquid-state Mg reaction.

Effects of MgO impurities and micro-cracks on the critical current density of Ti-sheathed MgB2 wires

2007 ◽  
Vol 457 (1-2) ◽  
pp. 47-54 ◽  
Author(s):  
G. Liang ◽  
M. Alessandrini ◽  
F. Yen ◽  
M. Hanna ◽  
H. Fang ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Mgb2 Wires ◽  
Micro Cracks

Comparison of Critical Current Density and Pinning Behaviour of Mono-core MgB2 Wires Prepared by Different Methods

2014 ◽  
Vol 28 (2) ◽  
pp. 443-446 ◽  
Author(s):  
Boris Brunner ◽  
Andreas Windbichler ◽  
Michael Reissner ◽  
Pavol Kovač ◽  
I Hušek
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Mgb2 Wires

Effects of TiB2 doping on the critical current density of MgB2 wires

2006 ◽  
Vol 443 (1-2) ◽  
pp. 5-8 ◽  
Author(s):  
H.L. Xu ◽  
Y. Feng ◽  
Z. Xu ◽  
G. Yan ◽  
C.S. Li ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Mgb2 Wires
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