Analysis of the co-doping effect of graphene and nano-Ni on grain connectivity and critical current density in MgB2 superconductors

2019 ◽  
Vol 30 (10) ◽  
pp. 9888-9896 ◽  
Author(s):  
Qian Zhao ◽  
Chuangchuang Gong ◽  
Pan Zhang ◽  
Yishan Liu ◽  
Yao Wang ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Doping Effect ◽  
Co Doping ◽  
Mgb2 Superconductors

Chemical (Sr,Co)-doping effect on critical current density for Dy123 melt-solidified bulks

2008 ◽  
Vol 151 (1) ◽  
pp. 69-73 ◽  
Author(s):  
Yui Ishii ◽  
Yuhya Yamazaki ◽  
Takayoshi Nakashima ◽  
Hiraku Ogino ◽  
Jun-ichi Shimoyama ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Doping Effect ◽  
Co Doping

Effect of Pulsed Magnetic Field Processing on MgB2 Superconductors

2007 ◽  
Vol 546-549 ◽  
pp. 2063-2066 ◽  
Author(s):  
W.X. Li ◽  
Ying Li ◽  
M.Y. Zhu ◽  
R.H. Chen ◽  
H.M. Jin ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Pulsed Magnetic Field ◽  
Pinning Force ◽  
Critical Current Density Jc ◽  
Mgb2 Superconductors ◽  
Doped Mgb2 ◽  
Flux Pinning Force

Pulsed magnetic field was first employed in the study on MgB2 superconductors. Superconductivity properties and microstructures of Zn and SiC doped MgB2 were discussed in this paper. The superconductors showed different superconductivities after magnetic sintering. Critical current density and flux pinning force were relevant to the dopants properties in MgB2. Grains in the pulsed magnetic processed MgB2 matrix were smaller than those in the normal processed one. The refinement microstructures have caused the critical current density (Jc) anisotropy in both the Zn and SiC doped MgB2.

scholarly journals TiO2Nano-doping Effect on Flux Pinning and Critical Current Density in an MgB2Superconductor

2011 ◽  
Vol 16 (1) ◽  
pp. 15-18
Author(s):  
J.H. Kang ◽  
J.S. Park ◽  
Y.P. Lee ◽  
V.G. Prokhorov
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Flux Pinning ◽  
Doping Effect

Critical current density in MgB2 bulk samples after co-doping with nano-SiC and poly zinc acrylate complexes

2011 ◽  
Vol 471 (21-22) ◽  
pp. 908-911 ◽  
Author(s):  
Z. Zhang ◽  
H. Suo ◽  
L. Ma ◽  
T. Zhang ◽  
M. Liu ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Co Doping ◽  
Mgb2 Bulk

scholarly journals Improvement of critical current density in MgB2 superconductors by Zr doping at ambient pressure

2001 ◽  
Vol 79 (24) ◽  
pp. 3983-3985 ◽  
Author(s):  
Y. Feng ◽  
Y. Zhao ◽  
Y. P. Sun ◽  
F. C. Liu ◽  
B. Q. Fu ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Ambient Pressure ◽  
Mgb2 Superconductors

EFFECT OF NANO-Y-ZrO2 ADDITION ON THE MICROSTRUCTURE AND CRITICAL CURRENT DENSITY OF MgB2 SUPERCONDUCTORS

2004 ◽  
Vol 03 (04n05) ◽  
pp. 563-569 ◽  
Author(s):  
Q. W. YAO ◽  
X. L. WANG ◽  
A. H. LI ◽  
S. X. DOU ◽  
P. R. MUNROE
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Magnetic Measurements ◽  
Transmission Electron ◽  
Long Time ◽  
Powder Addition ◽  
Short Time ◽  
Mgb2 Superconductors

Polycrystalline MgB 2 samples with 0, 5, 10, and 20 wt% nano- Y - ZrO 2 (YSZ) powder addition were prepared by short time, as little as several minutes, or long time in-situ reaction process. The phases, microstructures and flux pinning behaviors were characterized using X-ray diffractometry (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscope (TEM) and Magnetic Measurements. Results indicated that nano-YSZ particles included in MgB 2 grains. Samples doped with 10wt% YSZ powders showed new record of critical current density Jc as high as 1×106 and 4×106 A/cm 2 in low magnetic fields at 30 and 20K, respectively. However, the Jc drops faster compared to that made by long time sintering samples. It is proposed that the improved Jc in low fields was due to the enhanced density of the sample, which was caused by the YSZ nano-particle inclusion.

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