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Characterization of Baria-Alumina-Silica Glasses and Yba2Cu3O7−x Superconducting Films Prepared by the Sol-Gel-Process

Published online by Cambridge University Press:  25 February 2011

P. Strehlow ,
H. Schmidt  and
M. Birkhahn
P. Strehlow
Affiliation:
Fraunhofer-Institut für Silicatforschung, Neunerplatz 2, D-8700 Würzburg, Federal Republic of Germany
H. Schmidt
Affiliation:
Fraunhofer-Institut für Silicatforschung, Neunerplatz 2, D-8700 Würzburg, Federal Republic of Germany
M. Birkhahn
Affiliation:
Fraunhofer-Institut für Silicatforschung, Neunerplatz 2, D-8700 Würzburg, Federal Republic of Germany
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Abstract

The preparation of eutectics in the system BaO-Al2O3-SiO2 by the conventional technique is carried out by fusions with intermittent crushing and grinding. Hydrolysis and polycondensa-tion of alkoxides in a suitable solvent provide a simple way to obtain the homogeneous baria-alumina-silica glasses. The physical and chemical changes which occur during the gel-to-glass conversion were investigated on gel powders by thermal gravimetric analyses, differential thermal analyses, mass spectroscopy, nitrogen sorption analyses, and dilatometry.

By means of the sol-gel route it is also possible to prepare coating solutions in the Y-Ba-Cu-system. Coatings of composition YBa2Cu3O7−x were deposited on substrates using dip coating and characterized by scanning electron microscopy and measurements of superconducting temperature.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 121: Symposium H – Better Ceramics Through Chemistry III , 1988 , 791
Copyright
Copyright © Materials Research Society 1988

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References

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