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A Crucibleless Liquid Phase Growth Method of Preparing the Y‐Ba‐Cu‐0 Superconducting Films

Published online by Cambridge University Press:  28 February 2011

K.C. Chen ,
L.H. Perng ,
C.H. Lin ,
T.P. Perng ,
T.B. Wu ,
J.M. Wu  and
T.S. Chin
K.C. Chen
Affiliation:
Department of Materials Science and Engineering and Materials Science Center National Tsing Hua University, Hsinchu, Taiwan, 30043, the Rep. of China
L.H. Perng
Affiliation:
Department of Materials Science and Engineering and Materials Science Center National Tsing Hua University, Hsinchu, Taiwan, 30043, the Rep. of China
C.H. Lin
Affiliation:
Department of Materials Science and Engineering and Materials Science Center National Tsing Hua University, Hsinchu, Taiwan, 30043, the Rep. of China
T.P. Perng
Affiliation:
Department of Materials Science and Engineering and Materials Science Center National Tsing Hua University, Hsinchu, Taiwan, 30043, the Rep. of China
T.B. Wu
Affiliation:
Department of Materials Science and Engineering and Materials Science Center National Tsing Hua University, Hsinchu, Taiwan, 30043, the Rep. of China
J.M. Wu
Affiliation:
Department of Materials Science and Engineering and Materials Science Center National Tsing Hua University, Hsinchu, Taiwan, 30043, the Rep. of China
T.S. Chin
Affiliation:
Department of Materials Science and Engineering and Materials Science Center National Tsing Hua University, Hsinchu, Taiwan, 30043, the Rep. of China
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Abstract

Superconducting Y‐Ba‐Cu‐0 film can be prepared by a liquid phase growth method without crucible on 96 % and 99 % alumina substrates. A buffer layer of sputtered gold or platinum was necessary for the formation of Yba2Cu3Ox phase. The flux of Ba2Cu3O10. was appropriate for this purpose. For a film of 10 mm x 20 mm x 10 micron, 0.6 to 0.8 gm initial weight was optimal, the optimum melting temperature was 1090 to 1110 °C for 20 ‐ 30 minutes. In order to obtain films with superconducting transition, an additional Y2BaCuO5‐underlayer was necessary. The resultant optimal films had Tc‐onset of above 80 % and Tc ‐zero of typically around 60 K.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 169: Symposium M – High Temperature Superconductors: Fundamental Properties and Novel Materials Processing , 1989 , 727
Copyright
Copyright © Materials Research Society 1990

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References

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