Title

Texture enhancement of thick high-Tc superconductive films by zone-melting

Document Type

Conference Proceeding

Publication Title

American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD

Publication Date

12-1-1989

Abstract

Thick screen-printed superconducting YBa2Cu3O7-d and SrBiCaCu2Oy films on alumina substrates were post-processed by a zone-melting technique. This controlled heat transfer technique caused limited grain size increase in the Y-Ba-Cu-O films but greatly enhanced the texture of the Sr-Bi-Ca-Cu-O films. The grains of the bismuth containing films fused together, increasing the area of the grain interconnections. The porosity of the films was reduced significantly and the surface which was examined by scanning electron microscopy appeared to be smoother and more homogeneous. The films did not melt incongruently, and maintained their superconducting properties after processing.

Volume

123

First Page

77

Last Page

81

ISSN

02725673

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