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Development of low-fluorine solution route and UV photolysis process for YBa2Cu3O7−x coated conductors

Published online by Cambridge University Press:  24 July 2018

Yuanqing Chen
Affiliation:
Department of Materials Physics and Chemistry, Xi'an University of Technology, Xi'an 710048, China School for Engineering of Matter, Transport and Energy, Arizona State University, AZ 85287, USA
Wenwen Qu
Affiliation:
Department of Materials Physics and Chemistry, Xi'an University of Technology, Xi'an 710048, China
Weibai Bian
Affiliation:
Department of Materials Physics and Chemistry, Xi'an University of Technology, Xi'an 710048, China
Lingwei Li
Affiliation:
Department of Materials Physics and Chemistry, Xi'an University of Technology, Xi'an 710048, China
Aditya S. Yerramilli
Affiliation:
School for Engineering of Matter, Transport and Energy, Arizona State University, AZ 85287, USA
Na Li
Affiliation:
Department of Materials Physics and Chemistry, Xi'an University of Technology, Xi'an 710048, China
Yang Song
Affiliation:
Department of Materials Physics and Chemistry, Xi'an University of Technology, Xi'an 710048, China School for Engineering of Matter, Transport and Energy, Arizona State University, AZ 85287, USA
Huimin Wu
Affiliation:
Department of Materials Physics and Chemistry, Xi'an University of Technology, Xi'an 710048, China
Aijuan Wang
Affiliation:
Department of Materials Physics and Chemistry, Xi'an University of Technology, Xi'an 710048, China
N. David Theodore
Affiliation:
School for Engineering of Matter, Transport and Energy, Arizona State University, AZ 85287, USA CHD-Fab, NXP Semiconductors, 1300 N. Alma School Rd, Chandler, AZ 85224, USA
T. L. Alford*
Affiliation:
School for Engineering of Matter, Transport and Energy, Arizona State University, AZ 85287, USA
*
Address all correspondence to T. L. Alford at TA@asu.edu
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Abstract

The influence of the content of trifluoroacetate (TFA), in the precursor solution, on the critical current density (Jc) of YBa2Cu3O7−x (YBCO) superconducting films was investigated. We found that a TFA/Ba ratio of 0.68 is optimal to obtain high-performance YBCO films. Using this optimal solution, we then developed an ultraviolet (UV) light soaking technique to prepare YBCO films. This resulted in the constituent elements being uniformly distributed in the films, and this then enabled enhanced Jc. The addition of water vapor during the UV soaking process decreased the content of carbon residue in the films, and further increased the Jc of the resulting YBCO films.

Type
Research Letters
Copyright
Copyright © Materials Research Society 2018 

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