Polymer coating for filamentary YBa2Cu3O x superconductors.

Saved in:

Bibliographic Details
Title:	Polymer coating for filamentary YBa2Cu3O x superconductors.
Authors:	Takeuchi, F.¹, Goto, T.¹ zwgoto@mse.nitech.ac.j
Source:	Journal of Materials Science. Sep2001, Vol. 36 Issue 17, p4073-4078. 6p.
Subjects:	Superconductors, Yttrium, Metal fibers, Polyamides, Metal coating
Abstract:	Polymer coating for filamentary YBa2Cu3O x superconductors was examined. The precursor filaments were prepared by solution spinning through aqueous poly(vinyl alcohol) solution containing mixed acetates of Y, Ba and Cu. The as-drawn filaments were heated to remove volatile components and to generate a superconducting phase. The synthesis of polyamide acid for the polymer coating was made. The filamentary superconductors were coated with the polyamide acid and cured to convert to the polyimide. The surface of the sample was an insulator. The critical current ( Ic) value of the filamentary sample at 77 K was preserved by the polyimide coating. Moreover, the Ic for the polyimide-coated sample was maintained after holding at room temperature for more than 6 months. After thermal cycling between 77 K and room temperature 10 times, the Ic for the coated sample did not deteriorate, whereas the Ic for the sample without polymer coating disappeared. Polymer coating using epoxy resin applied to the filamentary superconductors was also examined. [ABSTRACT FROM AUTHOR]
	Copyright of Journal of Materials Science is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database:	Engineering Source

Description
Abstract:	Polymer coating for filamentary YBa2Cu3O x superconductors was examined. The precursor filaments were prepared by solution spinning through aqueous poly(vinyl alcohol) solution containing mixed acetates of Y, Ba and Cu. The as-drawn filaments were heated to remove volatile components and to generate a superconducting phase. The synthesis of polyamide acid for the polymer coating was made. The filamentary superconductors were coated with the polyamide acid and cured to convert to the polyimide. The surface of the sample was an insulator. The critical current ( Ic) value of the filamentary sample at 77 K was preserved by the polyimide coating. Moreover, the Ic for the polyimide-coated sample was maintained after holding at room temperature for more than 6 months. After thermal cycling between 77 K and room temperature 10 times, the Ic for the coated sample did not deteriorate, whereas the Ic for the sample without polymer coating disappeared. Polymer coating using epoxy resin applied to the filamentary superconductors was also examined. [ABSTRACT FROM AUTHOR]
ISSN:	00222461
DOI:	10.1023/A:1017985412000