Abstract
The performance improvement of disk- shaped bulk MgB 2 superconductor by means of a nanoscopic diamond powder have been investigated in our previous studies, using a single-step solid-state reaction process. To further improve the critical current density (J c ), we added Ag with varied compositions of 3.5, 4.0, 4.5 wt.% in the optimized composition of 0.8 wt.% of nanodiamond added MgB 2 sample and synthesized in pure Ar atmosphere. All samples were sintered at an optimized temperature of 775°C for 3 hours. X-ray diffraction patterns conformed to the main phases of MgB 2 samples with additional phases observed in the Ag-added samples. Microstructures were observed with high magnification in field emission scanning electron microscope (FE-SEM) and indicated AgMg nanoparticles are embedded in the MgB 2 -nanodiamond matrix, which was correlated with XRD studies. Among, the 4.0 wt.% Ag doped sample exhibited the highest J c of 389 kA/cm 2 at 20 K. The present result showed that Ag addition to MgB 2 -nanodiamond is an effective pinning medium for bulk MgB 2 and might thus be attractive for a further performance improvement of the bulk MgB 2 material.
| Original language | English |
|---|---|
| Title of host publication | Superconductivity and Particle Accelerators 2018 |
| Editors | Dariusz Bocian, Ryszard S. Romaniuk |
| Publisher | SPIE |
| ISBN (Electronic) | 9781510627833 |
| DOIs | |
| Publication status | Published - 2019 Jan 1 |
| Event | 4th Conference on Superconductivity and Particle Accelerators, SPAS 2018 - Krakow, Poland Duration: 2018 Nov 27 → 2018 Nov 29 |
Publication series
| Name | Proceedings of SPIE - The International Society for Optical Engineering |
|---|---|
| Volume | 11054 |
| ISSN (Print) | 0277-786X |
| ISSN (Electronic) | 1996-756X |
Conference
| Conference | 4th Conference on Superconductivity and Particle Accelerators, SPAS 2018 |
|---|---|
| Country | Poland |
| City | Krakow |
| Period | 18/11/27 → 18/11/29 |
Fingerprint
Keywords
- Critical current density
- MgB bulk
- Scanning electron microscopy
- X-ray diffraction
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering
Cite this
Improved superconducting performance of Ag-added nano-diamond doped MgB 2 . / Dadiel, J. Longji; Miryala, Muralidhar; Murakami, Masato.
Superconductivity and Particle Accelerators 2018. ed. / Dariusz Bocian; Ryszard S. Romaniuk. SPIE, 2019. 110540I (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11054).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Improved superconducting performance of Ag-added nano-diamond doped MgB 2
AU - Dadiel, J. Longji
AU - Miryala, Muralidhar
AU - Murakami, Masato
PY - 2019/1/1
Y1 - 2019/1/1
N2 - The performance improvement of disk- shaped bulk MgB 2 superconductor by means of a nanoscopic diamond powder have been investigated in our previous studies, using a single-step solid-state reaction process. To further improve the critical current density (J c ), we added Ag with varied compositions of 3.5, 4.0, 4.5 wt.% in the optimized composition of 0.8 wt.% of nanodiamond added MgB 2 sample and synthesized in pure Ar atmosphere. All samples were sintered at an optimized temperature of 775°C for 3 hours. X-ray diffraction patterns conformed to the main phases of MgB 2 samples with additional phases observed in the Ag-added samples. Microstructures were observed with high magnification in field emission scanning electron microscope (FE-SEM) and indicated AgMg nanoparticles are embedded in the MgB 2 -nanodiamond matrix, which was correlated with XRD studies. Among, the 4.0 wt.% Ag doped sample exhibited the highest J c of 389 kA/cm 2 at 20 K. The present result showed that Ag addition to MgB 2 -nanodiamond is an effective pinning medium for bulk MgB 2 and might thus be attractive for a further performance improvement of the bulk MgB 2 material.
AB - The performance improvement of disk- shaped bulk MgB 2 superconductor by means of a nanoscopic diamond powder have been investigated in our previous studies, using a single-step solid-state reaction process. To further improve the critical current density (J c ), we added Ag with varied compositions of 3.5, 4.0, 4.5 wt.% in the optimized composition of 0.8 wt.% of nanodiamond added MgB 2 sample and synthesized in pure Ar atmosphere. All samples were sintered at an optimized temperature of 775°C for 3 hours. X-ray diffraction patterns conformed to the main phases of MgB 2 samples with additional phases observed in the Ag-added samples. Microstructures were observed with high magnification in field emission scanning electron microscope (FE-SEM) and indicated AgMg nanoparticles are embedded in the MgB 2 -nanodiamond matrix, which was correlated with XRD studies. Among, the 4.0 wt.% Ag doped sample exhibited the highest J c of 389 kA/cm 2 at 20 K. The present result showed that Ag addition to MgB 2 -nanodiamond is an effective pinning medium for bulk MgB 2 and might thus be attractive for a further performance improvement of the bulk MgB 2 material.
KW - Critical current density
KW - MgB bulk
KW - Scanning electron microscopy
KW - X-ray diffraction
UR - http://www.scopus.com/inward/record.url?scp=85066024533&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85066024533&partnerID=8YFLogxK
U2 - 10.1117/12.2525216
DO - 10.1117/12.2525216
M3 - Conference contribution
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Superconductivity and Particle Accelerators 2018
A2 - Bocian, Dariusz
A2 - Romaniuk, Ryszard S.
PB - SPIE
ER -