Improvement of critical current density Jc in powder-in-tube rapid heating, quenching and transformation Nb3Al wires by doping with nano-SnO2. (1st June 2023)

• Record Type: Journal Article
• Authors: Yang, Changkun; Qu, Pengshuai; Li, Shulong; Sun, Xiaguang; Xu, Min; Liu, Lian; Chen, Yong Liang; Wang, Wentao; Zhang, Yong; Feng, Yong; Yu, Zhou; Zhao, Yong
• Is Part Of: Superconductor science & technology. Volume 36:Number 6(2023)
• Publication Date: 2023-06-01
• Subjects: n-SnO2 doping -- PIT Nb3Al wires -- RHQT -- Jc improvement; Superconductivity -- Periodicals; Superconductors -- Periodicals; 537.623
• DOI: 10.1088/1361-6668/acc6f9
• Languages: English
• ISSNs: 0953-2048

Abstract

Abstract: We prepared Nb3 Al superconducting wires doped with nano-size SnO2 (n-SiO2 ) particles through a multi-time rapid heating and quenching process and investigated their microstructure and superconducting properties. All the samples showed a highly homogeneous A15 Nb3 Al phase. Compared with pure Nb3 Al, the n-SnO2 doped Nb3 Al wires presented a larger Δ T c value and a higher J c value. The best J c at 4.2 K was found in the 1 wt% n-SnO2 doped Nb3 Al sample, with 3.37 × 10 5 A cm −2, 2.55 × 10 5 A cm −2 and 1.80 × 10 5 A cm −2 at 8 T, 10 T and 12 T, respectively. These results were an improvement of about 60% compared with pure Nb3 Al at the same applied fields. The maximum irreversible field value was obtained in the 1 wt% SnO2 -doped Nb3 Al wire, with a result of 29.5 T at 4.2 K. The improvement of J c performance in the n-SnO2 doped Nb3 Al wires might be attributed to the formation of artificial nanoparticles in the grain, which act as extra effective flux pinning centers.