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Evaluation Of YBa2Cu3O7-δ Sol-Gel Derived Films On Sapphire Substrates Produced From Different Cu(Ii) Alkoxide Groups.

Published online by Cambridge University Press:  28 February 2011

D.S. Kenzer ,
M.R. Teepe ,
G.A. Moore  and
G. Kordas
M.R. Teepe
Affiliation:
Science and Technology Center for Superconductivity, Materials Research Laboratory, Department of Materials Science and Engineering, Ceramics Division, University of Illinois at Urbana-Champaign, 105 S. Goodwin, Urbana, IL 61801
G.A. Moore
Affiliation:
Science and Technology Center for Superconductivity, Materials Research Laboratory, Department of Materials Science and Engineering, Ceramics Division, University of Illinois at Urbana-Champaign, 105 S. Goodwin, Urbana, IL 61801
G. Kordas
Affiliation:
Science and Technology Center for Superconductivity, Materials Research Laboratory, Department of Materials Science and Engineering, Ceramics Division, University of Illinois at Urbana-Champaign, 105 S. Goodwin, Urbana, IL 61801
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Abstract

Yttrium methoxyethoxide, barium methoxyethoxide and various copper(II) alkoxide groups were used as precursors for the formation of YBa2Cu3O7-δ stable sols in a 2- methoxyethanol / methyl ethyl ketone / toluene / diisopropyl ketone solvent system. Sol fractal dimensions were varied with the sol concentration and with the addition of pyridine. Strong correlation was found between the wettability and the fractal dimensions of the various precursors as determined by contact angle measurements. YBa2Cu3O7-δ thin films were deposited on sapphire substrates using a dip-coating technique. The films were fired at 850°C under flowing oxygen or an ozone/oxygen mixture. Although the ozonetreatments helped in the formation of single YBa2Cu3O7-δ phase, they contributed to extensive cracking in the films. The different copper(II) alkoxide precursors had little effect on final film microstructure.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 180: Symposium A – Better Ceramics Through Chemistry IV , 1990 , 947
Copyright
Copyright © Materials Research Society 1990

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References

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