Preparation of YBCO films on YSZ and silver substrates by the dipping pyrolysis process

✍ Scribed by H. Yokota; J.S. Abell

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 144 KB
• Volume: 235-240
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(94)91538-5

✦ Synopsis

YBCO films were prepared on YSZ and Ag substrates by the diffusion reaction of two-layer structures of a Y2BaCuO5 (211) film and a 3BaCO3+5CuO (035) or 3BaCO3+7CuO (037) film with silver doping formed by the dipping pyrolysis process using metal naphthenates as starting materials. The heat treatment of the two layer precursor films at 770°C in 3x10 -4 atm yields YBCO films highly oriented toward the c-axis; a comparatively sharp superconducting transition of Tc onset=89-90k was observed for films with (Ag/YBCO) molar ratio of 0.15-0.60. The critical current densities (77K, 0T) of 1-3 micron thick product films on YSZ and Ag substrates were 2300A/cm 2 and 20,000A/cm 2 respectively.