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Jiang J, Bradford G, Hossain SI, Brown M, Cooper J, Miller E, Huang Y, Miao H, Parrell JA, White M, Hunt A, Sengupta S, Revur R, Shen T, Kametani F, Trociewitz UP, Hellstrom EE, Larbalestier DC. High Performance Bi-2212 Round Wires Made with Recent Powders. IEEE Trans Appl Supercond 2019; 29:6400405. [PMID: 33737796 PMCID: PMC7968414 DOI: 10.1109/tasc.2019.2895197] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Multifilamentary Bi2Sr2CaCu2Ox (Bi-2212) wire made by the powder-in-tube technique is the only high temperature superconductor made in the round shape preferred by magnet builders. The critical current density (J C ) of Bi-2212 round wire was improved significantly by the development of overpressure heat treatment in the past few years. Bi-2212 wire is commercially available in multiple architectures and kilometer-long pieces and a very promising conductor for very high field NMR and accelerator magnets. We studied the effects of precursor powder and heat treatment conditions on the superconducting properties and microstructure of recent Bi-2212 wires. Short samples of recent wire with optimized overpressure processing showed J C (4.2 K, 15 T) = 6640 A/mm2 and J C (4.2 K, 30 T) = 4670 A/mm2, which correspond to engineering critical current densities J E (4.2 K, 15 T) = 1320 A/mm2 and J E (4.2 K, 30 T) = 930 A/mm2.
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Affiliation(s)
- J Jiang
- Applied Superconductivity Center, National High Magnetic Laboratory, Tallahassee, FL 32310, USA and also with Florida State University
| | - G Bradford
- Applied Super-conductivity Center, National High Magnetic Laboratory, Tallahassee, FL 32310, USA and also with Florida State University
| | - S I Hossain
- Applied Super-conductivity Center, National High Magnetic Laboratory, Tallahassee, FL 32310, USA and also with Florida State University
| | - M Brown
- Applied Super-conductivity Center, National High Magnetic Laboratory, Tallahassee, FL 32310, USA and also with Florida State University
| | - J Cooper
- Applied Super-conductivity Center, National High Magnetic Laboratory, Tallahassee, FL 32310, USA and also with Florida State University
| | - E Miller
- Applied Super-conductivity Center, National High Magnetic Laboratory, Tallahassee, FL 32310, USA and also with Florida State University
| | - Y Huang
- Bruker OST, Carteret, NJ 07008, USA
| | - H Miao
- Bruker OST, Carteret, NJ 07008, USA
| | | | - M White
- nGimat LLC, 2436 Over Dr. Lexington, KY 40511, USA
| | - A Hunt
- nGimat LLC, 2436 Over Dr. Lexington, KY 40511, USA
| | - S Sengupta
- MetaMateria, 870 Kaderly Dr, Columbus, OH 43228, USA
| | - R Revur
- MetaMateria, 870 Kaderly Dr, Columbus, OH 43228, USA
| | - T Shen
- Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - F Kametani
- Applied Super-conductivity Center, National High Magnetic Laboratory, Tallahassee, FL 32310, USA and also with Florida State University
| | - U P Trociewitz
- Applied Super-conductivity Center, National High Magnetic Laboratory, Tallahassee, FL 32310, USA and also with Florida State University
| | - E E Hellstrom
- Applied Super-conductivity Center, National High Magnetic Laboratory, Tallahassee, FL 32310, USA and also with Florida State University
| | - D C Larbalestier
- Applied Super-conductivity Center, National High Magnetic Laboratory, Tallahassee, FL 32310, USA and also with Florida State University
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