Title :
Synthesis and properties of TlBaCaCuO films prepared by spray pyrolysis method
Author :
Naziripour, A. ; Duan, H.M. ; Sharp, J. ; Hermann, A.M. ; de Rochemont, L.P. ; Squillante, M. ; Zhang, J.G. ; Oakes, C.E. ; Parilla, P.A. ; Bhattacharya, R.N. ; Blaugher, R.D.
Author_Institution :
Dept. of Phys., Colorado Univ., Boulder, CO, USA
fDate :
9/1/1992 12:00:00 AM
Abstract :
The authors report on the fabrication, characterization, and transport properties of TlBaCaCuO (TBCCO) high-Tc superconducting films made from a low-cost, simple spray pyrolysis technique. This technique is applicable to the fabrication of large-area films for the design and fabrication of conformal superconducting coatings and large-area microwave devices. A high annealing temperature, close to the melting point of TBCCO, is needed in order to eliminate flaws, voids, and cracks. Measurements on the films showed relatively modest critical current densities. There was significant improvement in the critical current density by using an annealing temperature of approximately 895°C. At this temperature, the material melted partially and showed improved surface morphology
Keywords :
annealing; barium compounds; calcium compounds; critical current density (superconductivity); pyrolysis; superconducting microwave devices; superconducting thin films; thallium compounds; 895 degC; TlBaCaCuO; annealing temperature; conformal superconducting; cracks; critical current densities; flaws; high-Tc superconducting films; large-area films; large-area microwave devices; spray pyrolysis method; surface morphology; transport properties; voids; Annealing; Coatings; Critical current density; Density measurement; Fabrication; Microwave theory and techniques; Spraying; Superconducting films; Superconducting microwave devices; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
