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Characterization of baria-aluminia-silica glasses and YBa2Cu3O7-X superconducting films prepared by the sol-gel-process

: Strehlow, P.; Schmidt, H.; Birkhahn, M.

Brinker, C.J. ; Materials Research Society -MRS-:
Better ceramics through chemistry. Papers presented at the Third Materials Research Society Symposium on Better Ceramics through Chemistry
Pittsburgh/Pa., 1988 (Materials Research Society symposia proceedings 121)
ISBN: 0-931837-91-X
Symposium on Better Ceramics through Chemistry <3, 1988, Reno/Nev.>
Conference Paper
Fraunhofer ISC ()
Glas(hochschmelzend); Sol-Gel-Prozeß

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 polycondensation 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 YBa2Cu3O(-7x) were deposited on substrates using dip coating and characterized by scanning electron microscopy and measurements of superconducting temperature. (ISC)