Preparation of Superconducting Ba2YCu3O7-δ Thin Films by the Dipping-Pyrolysis Process Using Metal Naphthenates and Acetylacetonates
Open Access
- 1 January 1989
- journal article
- Published by Ceramic Society of Japan in Journal of the Ceramic Society of Japan
- Vol. 97 (1124) , 454-460
- https://doi.org/10.2109/jcersj.97.454
Abstract
Thin films of superconductor Ba2YCu3O7-δ (BYCO) were prepared on the yttria-stabilized zirconia substrates by the dipping-pyrolysis process using metal naphthenates and acetylacetonates as starting materials. Barium, yttrium and copper naphthenates and acetylacetonates, with molar ratios of (A) Ba:Y:Cu=2:1:3 and (B) 3:1:4.3, were dissolved in toluene and a mixture of pyridine and propionic acid, respectively, to make homogeneous solutions. After dipping, drying and preheating at 500°C were repeated 10-20 times, final heat treatment at 950°-970°C in O2 gave 5-10μm thick BYCO films, which showed superconduction at Tc, zero of 89-91K. Results of scanning electron microscopy and X-ray diffraction analysis showed dense textures of orthorhombic BYCO grains.Keywords
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