Rapid furnace annealing of YBa{sub 2}Cu{sub 3}O{sub x} thick films on Ni/NiO and inconel substrates prepared by spray pyrolysis of YBa{sub 2}Cu{sub 3}O{sub x} powder
- National Renewable Energy Lab., Golden, CO (United States)
A spray pyrolysis growth system has been employed for the formation of superconducting YBa{sub 2}Cu{sub 3}O{sub x} (YBCO) thick films. YBCO films on polycrystalline Ni/NiO, Inconel 600, and Inconel X substrates ranging in thickness from 80--100 {micro}m have been developed by a three-step process with observed T{sub c zero} values up to 85 K. In the first step, the metallic substrates were examined with and without a preoxidation anneal to form a native oxide layer. Second, superconducting YBCO powder (0.2 {micro}m particle size) was mixed with ethanol and sprayed onto the substrates. Third, the films were sintered at high temperature and oxygenated to form the superconducting phase. The effect of a native oxide buffer layer upon superconducting properties was evaluated as a function of the duration of the preoxidation anneal and the sintering anneal. X-ray diffraction (XRD) {theta}/2{theta}, variable temperature four-probe resistance, and Auger line scan characterization of these films will be discussed.
- DOE Contract Number:
- AC36-83CH10093
- OSTI ID:
- 83494
- Journal Information:
- Materials Research Bulletin, Vol. 30, Issue 6; Other Information: PBD: Jun 1995
- Country of Publication:
- United States
- Language:
- English
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