Significant improvement in the critical current density of MgB2 bulks in situ sintered at low temperature by excess Mg addition

2014 ◽  
Vol 496 ◽  
pp. 49-52 ◽  
Author(s):  
Zongqing Ma ◽  
Yongchang Liu ◽  
Qi Cai ◽  
Liming Yu
Keyword(s):  
Low Temperature ◽  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Mg Addition ◽  
Excess Mg ◽  
Mgb2 Bulks

scholarly journals Excess Mg addition MgB2/Fe wires with enhanced critical current density

2008 ◽  
Vol 103 (8) ◽  
pp. 083911 ◽  
Author(s):  
R. Zeng ◽  
L. Lu ◽  
W. X. Li ◽  
J. L. Wang ◽  
D. Q. Shi ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Mg Addition ◽  
Excess Mg

HIGH CRITICAL CURRENT DENSITY OF MgB2 BULKS SINTERED IN FLOWING WELDING GRADE Ar ATMOSPHERE

2009 ◽  
Vol 23 (17) ◽  
pp. 3538-3541 ◽  
Author(s):  
Y. ZHANG ◽  
S. H. ZHOU ◽  
W. X. LI ◽  
X. L. WANG ◽  
S. X. DOU
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
High Purity ◽  
Upper Critical Field ◽  
Protective Atmosphere ◽  
Superconducting Properties ◽  
Mgb2 Bulks ◽  
Different Levels

The effect of processing atmosphere on the microstructure and superconducting properties of MgB 2 was studied for bulk samples made using the in situ reaction technique under argon gas with three different levels of purity: ultra-high, high, and welding grade. The critical temperature, T c , decreased by 0.5 K, while the full width at half maximum (FWHM) of the MgB 2 peaks, and the resistivity showed an increase in the sample processed in welding Ar . The critical current density, J c , and the upper critical field, H c 2, for the welding Ar sample were improved in comparison with the samples treated in ultra-high and high purity argon. Optimal J c in MgB 2 can be achieved by using readily available and economical welding grade Ar as the protective atmosphere instead of using ultra-high or high purity Ar .

Significant improvement in the critical current density ofin situMgB2by excess Mg addition

2007 ◽  
Vol 20 (8) ◽  
pp. L43-L47 ◽  
Author(s):  
R Zeng ◽  
L Lu ◽  
J L Wang ◽  
J Horvat ◽  
W X Li ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Mg Addition ◽  
Excess Mg

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
Sign in / Sign up

Export Citation Format

Share Document