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Aligned Bismuth, Strontium, Calcium Cuprate Coatings on Polycrystalline Substrates.
Patent Application, Filed 21 Mar 90,
DEPARTMENT OF THE NAVY WASHINGTON DC
Pagination or Media Count:
The present invention relates in general to a process for forming thick film superconducting coatings on a polycrystalline substrate and, more particularly, to a process for forming a thick film of BiaSrbCacCudOxBSCCO on a polycrystalline substrate. A process is provided for forming an oriented thick film superconducting coating on a polycrystalline substrate, the coating comprising at least two highly oriented components. The process is a powdered mixture prepared from Bi2O3, SrCO3, CaCO3, and CuO onto a polycrystalline substrate rapidly heating the resultant coated substrate to a temperature of from about 1000-1100 C for a period of from about 5-30 minutes, thereby melting the powder and forming a thick film coating rapidly quenching the coated substrate to below 500 C, which is below the temperature at which phase transition occurs. Patent applications. jes
APPROVED FOR PUBLIC RELEASE