Abstract
In this work, we report an optimum amount of Mg precursor required for obtaining high critical current density (Jc) of bulk MgB2 superconductor synthesized via solid state sintering. We add a slight excess of Mg precursor to balance its losses while formation of pinning phases and impurities such as Ag-Mg phases and MgO, respectively. Several amounts of Mg had been varied such as x = 1.05, 1.075, 1.1, 1.125, and 1.15 in MgxB2. To obtain the best critical current density values, we used carbon encapsulated boron (1.5% carbon) and added 4 wt% Ag. The X-ray diffraction analysis showed the presence of AgMg and AgMg3 phases and a minute amount of MgO. The SQUID measurements indicated that highest Jc of 350 kA/cm2 at 20 K and self-field in sample with x = 1.075. All results analyzed explain the improved critical current performance based on nanometer-sized Ag-Mg particles in the final product.
| Original language | English |
|---|---|
| Article number | 8000904 |
| Journal | IEEE Transactions on Applied Superconductivity |
| Volume | 29 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2019 Jan 1 |
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Keywords
- Ag addition
- critical current density (Jc)
- MgB
- precursor optimization
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering
Cite this
Optimization of Mg Precursor Concentration to Obtain High Jc in MgB2 Synthesized with Ag Addition and Carbon Encapsulated Boron. / Arvapalli, Sai Srikanth; Miryala, Muralidhar; Murakami, Masato.
In: IEEE Transactions on Applied Superconductivity, Vol. 29, No. 5, 8000904, 01.01.2019.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Optimization of Mg Precursor Concentration to Obtain High Jc in MgB2 Synthesized with Ag Addition and Carbon Encapsulated Boron
AU - Arvapalli, Sai Srikanth
AU - Miryala, Muralidhar
AU - Murakami, Masato
PY - 2019/1/1
Y1 - 2019/1/1
N2 - In this work, we report an optimum amount of Mg precursor required for obtaining high critical current density (Jc) of bulk MgB2 superconductor synthesized via solid state sintering. We add a slight excess of Mg precursor to balance its losses while formation of pinning phases and impurities such as Ag-Mg phases and MgO, respectively. Several amounts of Mg had been varied such as x = 1.05, 1.075, 1.1, 1.125, and 1.15 in MgxB2. To obtain the best critical current density values, we used carbon encapsulated boron (1.5% carbon) and added 4 wt% Ag. The X-ray diffraction analysis showed the presence of AgMg and AgMg3 phases and a minute amount of MgO. The SQUID measurements indicated that highest Jc of 350 kA/cm2 at 20 K and self-field in sample with x = 1.075. All results analyzed explain the improved critical current performance based on nanometer-sized Ag-Mg particles in the final product.
AB - In this work, we report an optimum amount of Mg precursor required for obtaining high critical current density (Jc) of bulk MgB2 superconductor synthesized via solid state sintering. We add a slight excess of Mg precursor to balance its losses while formation of pinning phases and impurities such as Ag-Mg phases and MgO, respectively. Several amounts of Mg had been varied such as x = 1.05, 1.075, 1.1, 1.125, and 1.15 in MgxB2. To obtain the best critical current density values, we used carbon encapsulated boron (1.5% carbon) and added 4 wt% Ag. The X-ray diffraction analysis showed the presence of AgMg and AgMg3 phases and a minute amount of MgO. The SQUID measurements indicated that highest Jc of 350 kA/cm2 at 20 K and self-field in sample with x = 1.075. All results analyzed explain the improved critical current performance based on nanometer-sized Ag-Mg particles in the final product.
KW - Ag addition
KW - critical current density (Jc)
KW - MgB
KW - precursor optimization
UR - http://www.scopus.com/inward/record.url?scp=85061208935&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85061208935&partnerID=8YFLogxK
U2 - 10.1109/TASC.2019.2892145
DO - 10.1109/TASC.2019.2892145
M3 - Article
VL - 29
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
SN - 1051-8223
IS - 5
M1 - 8000904
ER -