Screen-Printed Superconducting Y-Ba-Cu-O Thick Films on Various Substrates
Superconducting thick films of the Y-Ba-Cu-O system prepared by screen-printing and sintering on different substrates were investigated to study the effect of the substrate material on the superconducting properties of the films. These properties were determined by carrying out structural studies us...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
1989-01-01
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| Series: | Active and Passive Electronic Components |
| Online Access: | http://dx.doi.org/10.1155/1989/82586 |
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| Summary: | Superconducting thick films of the Y-Ba-Cu-O system prepared by screen-printing and
sintering on different substrates were investigated to study the effect of the substrate
material on the superconducting properties of the films. These properties were determined
by carrying out structural studies using SEM, EPMA and XRD and by
determining the electrical resistivity. The effect of diffusion barrier layers between the
film and the substrate on the superconducting properties of the film was also studied.
The onset temperature of superconductivity in YBa2Cu3O7−δ (123) superconducting
thick film was around 92 K on almost all the substrates. The substrate material had an
influence on the temperature at which zero resistance (i.e. Tc) was attained. This
varied from 85 K on yttrium stabilized zirconium oxide (YSZ) and nickel substrates
down to below 70 K on other substrates. Nickel offered promise as being a good
diffusion barrier between the substrate and the 123 superconducting thick film because
the reactions between the film and nickel occurred slowly and did not impair the
superconducting properties of the film. In the case of alumina substrates, there was a
rapid reaction which took place at high annealing temperatures. A BaAl2O4 phase was
found between the film and the alumina substrate which promoted adhesion but
resulted in poor superconducting properties of the film. |
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| ISSN: | 0882-7516 1563-5031 |