Crystal growth of C-doped MgB2 superconductors: accidental doping and inhomogeneity

2004 ◽  
Vol 412-414 ◽  
pp. 31-35 ◽  
Author(s):  
Sergey Lee ◽  
Takahiko Masui ◽  
Ayako Yamamoto ◽  
Hiroshi Uchiyama ◽  
Setsuko Tajima
Keyword(s):  
Crystal Growth ◽  
Mgb2 Superconductors ◽  
Doped Mgb2

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.

Effect of Boron Purity on Superconducting Properties of SiC Doped MgB2

2008 ◽  
Vol 41-42 ◽  
pp. 253-258 ◽  
Author(s):  
Bo Qu ◽  
Xu Dong Sun ◽  
Zhi Meng Xiu ◽  
Jung Ho Kim ◽  
Shi Xue Dou ◽  
...  
Keyword(s):  
Raw Materials ◽  
Low Cost ◽  
Xrd Analysis ◽  
Particle Sizes ◽  
Amorphous Boron ◽  
Boron Powder ◽  
Boron Particle ◽  
Mgb2 Superconductors ◽  
Doped Mgb2 ◽  
Main Impurity

The effect of purity of amorphous boron raw materials on properties of the hot pressed SiC doped MgB2 superconductor was investigated. MgB2 superconductors with magnetic Jc over 106 A/cm2 and remaining Jc of 105 A/cm2 at 4.2 K and 5 T were fabricated by hot pressing using both high purity (99.00%) and low purity (88.84%) boron powders. XRD analysis shows that purity of the boron powders has little effect on phase component of the MgB2 samples. If the main impurity in amorphous boron is Mg, low purity low cost boron powder is suitable as one of the raw materials for fabricating MgB2. Particle sizes of boron has significant effect on microstructure and properties of MgB2. Smaller boron particle size leads to smaller grain size of MgB2, higher density, higher lattice distortion, and thus higher magnetic Jc.

Phase separation in carbon-doped MgB2 superconductors

2002 ◽  
Vol 318 (4) ◽  
pp. 392-397 ◽  
Author(s):  
I Maurin ◽  
S Margadonna ◽  
K Prassides ◽  
T Takenobu ◽  
T Ito ◽  
...  
Keyword(s):  
Phase Separation ◽  
Carbon Doped ◽  
Mgb2 Superconductors ◽  
Doped Mgb2

scholarly journals 11B NMR study of pure and lightly carbon-doped MgB2 superconductors

2005 ◽  
Vol 18 (4) ◽  
pp. 521-528
Author(s):  
M. Karayanni ◽  
G. Papavassiliou ◽  
M. Pissas ◽  
M. Fardis ◽  
K. Papagelis ◽  
...  
Keyword(s):  
Carbon Doped ◽  
Nmr Study ◽  
11B Nmr ◽  
Mgb2 Superconductors ◽  
Doped Mgb2

The enhancement of Jc in nano SiC-doped MgB2 superconductors rapidly synthesized by activated sintering at low-temperature

2009 ◽  
Vol 61 (8) ◽  
pp. 836-839 ◽  
Author(s):  
Zongqing Ma ◽  
Yongchang Liu ◽  
Wenping Hu ◽  
Zhiming Gao ◽  
Liming Yu ◽  
...  
Keyword(s):  
Low Temperature ◽  
Activated Sintering ◽  
Mgb2 Superconductors ◽  
Doped Mgb2

scholarly journals 11B NMR Study of Pure and Lightly Carbon-Doped MgB2 Superconductors

2005 ◽  
Vol 18 (4) ◽  
pp. 521-528 ◽  
Author(s):  
M. Karayanni ◽  
G. Papavassiliou ◽  
M. Pissas ◽  
M. Fardis ◽  
K. Papagelis ◽  
...  
Keyword(s):  
Carbon Doped ◽  
Nmr Study ◽  
11B Nmr ◽  
Mgb2 Superconductors ◽  
Doped Mgb2

Evaluation and control of residual amorphous phases in carbon-doped MgB2 superconductors

2021 ◽  
Vol 864 ◽  
pp. 158867
Author(s):  
Seyong Choi ◽  
Dipak Patel ◽  
Jung Ho Kim ◽  
Hiroaki Kumakura ◽  
Akiyoshi Matsumoto ◽  
...  
Keyword(s):  
Carbon Doped ◽  
Amorphous Phases ◽  
And Control ◽  
Mgb2 Superconductors ◽  
Doped Mgb2
Sign in / Sign up

Export Citation Format

Share Document