Improved superconducting performance of Ag-added nano-diamond doped MgB 2

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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 languageEnglish
Title of host publicationSuperconductivity and Particle Accelerators 2018
EditorsDariusz Bocian, Ryszard S. Romaniuk
PublisherSPIE
ISBN (Electronic)9781510627833
DOIs
Publication statusPublished - 2019 Jan 1
Event4th Conference on Superconductivity and Particle Accelerators, SPAS 2018 - Krakow, Poland
Duration: 2018 Nov 272018 Nov 29

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume11054
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

Conference4th Conference on Superconductivity and Particle Accelerators, SPAS 2018
CountryPoland
CityKrakow
Period18/11/2718/11/29

Fingerprint

Nanodiamonds
Diamond
Diamonds
diamonds
Chemical analysis
Solid state reactions
Field emission
Powders
Diffraction patterns
Superconducting materials
Electron microscopes
Nanoparticles
Scanning
X ray diffraction
Microstructure
magnification
field emission
critical current
diffraction patterns
electron microscopes

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

Dadiel, J. L., Miryala, M., & Murakami, M. (2019). Improved superconducting performance of Ag-added nano-diamond doped MgB 2 In D. Bocian, & R. S. Romaniuk (Eds.), Superconductivity and Particle Accelerators 2018 [110540I] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11054). SPIE. https://doi.org/10.1117/12.2525216

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 proceedingConference contribution

Dadiel, JL, Miryala, M & Murakami, M 2019, Improved superconducting performance of Ag-added nano-diamond doped MgB 2 in D Bocian & RS Romaniuk (eds), Superconductivity and Particle Accelerators 2018., 110540I, Proceedings of SPIE - The International Society for Optical Engineering, vol. 11054, SPIE, 4th Conference on Superconductivity and Particle Accelerators, SPAS 2018, Krakow, Poland, 18/11/27. https://doi.org/10.1117/12.2525216
Dadiel JL, Miryala M, Murakami M. Improved superconducting performance of Ag-added nano-diamond doped MgB 2 In Bocian D, Romaniuk RS, editors, Superconductivity and Particle Accelerators 2018. SPIE. 2019. 110540I. (Proceedings of SPIE - The International Society for Optical Engineering). https://doi.org/10.1117/12.2525216
Dadiel, J. Longji ; Miryala, Muralidhar ; Murakami, Masato. / Improved superconducting performance of Ag-added nano-diamond doped MgB 2 Superconductivity and Particle Accelerators 2018. editor / Dariusz Bocian ; Ryszard S. Romaniuk. SPIE, 2019. (Proceedings of SPIE - The International Society for Optical Engineering).
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