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Reactive liquid phase sintering of YBa2Cu3O7-x superconducting thin films: Part II. Sintering mechanism and film properties

Published online by Cambridge University Press:  03 March 2011

Peir-Yung Chu  and
Relva C. Buchanan
Peir-Yung Chu
Affiliation:
Department of Materials Science and Engineering, University of Cincinnati, Cincinnati, Ohio 45221
Relva C. Buchanan
Affiliation:
Department of Materials Science and Engineering, University of Cincinnati, Cincinnati, Ohio 45221
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Extract

Reactive liquid phase sintering of the YBCO films prepared from carboxylate solution precursors was investigated. A liquid phase was formed by the BaO—CuO binary compound at 620 °C, which facilitated the crystallization and growth of the YBCO grains. Strong capillary forces associated with the liquid phase sintering resulted in a dense, highly oriented microstructure. The YBCO films processed by this reactive liquid phase process showed Tc(zero) = 90.2 K and Jc = 1.3 × 105 A/cm2 at 77 K. The (006) rocking curve measurement indicated excellent grain orientation with a FWHM better than 0.2°. A secondary ion mass spectroscopy (SIMS) study showed uniform film composition, and the film/substrate interaction zone was limited to ≈0.1 μm. Average film roughness was about 32 nm.

Type
Articles
Information
Journal of Materials Research , Volume 9 , Issue 4 , April 1994 , pp. 844 - 851
Copyright
Copyright © Materials Research Society 1994

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