Abstract

YBa2Cu3O7−δ (Y-123) ceramics added with small amounts (0.0 – 0.8 wt%) of carbon nanotubes (CNTs) were synthesized using co-precipitation process. The effects of CNTs addition on the critical temperature (Tc), critical current density (Jc) measured at 30 K in self-field, phase formation and microstructure properties including elemental compositional analysis were studied. The onset (Tc-onset) and offset critical temperatures (Tc-offset) reduced with increasing CNTs concentration up to x = 0.6 wt% and then increased for sample x = 0.8 wt%. The metallic behaviour of Y-123 changes to semiconducting behaviour with the addition of CNTs. Introduction of CNTs improved Jc significantly. The Jc for pure sample, with volume fraction of 96.2% of Y-123, is 11 A/cm2. The highest value of Jc, 477 A/cm2, is observed for sample x = 0.2 wt%. Sample x = 0.8 wt% shows the highest Tc with good crystallinity and orthorhombicity factor among the added samples. The result suggests the enhancement of Jc may be caused by flux pinning phenomena with the introduction of CNT’s in Y-123 host system.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.