Method of Preparing Superconducting 'Orthorhomibic' -Type Compounds in Bulk Using C1-C6 Alkanoic Acid Salts.
Patent, filed 29 Feb 88, Patented 13 Feb 90,
DEPARTMENT OF THE NAVY WASHINGTON DC
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Superconducting compositions of the general formula AnQmCu3Oy are prepared by wet mixing a combination organic acid salts, inorganic acid salts and oxides of A, Q and Cu, wherein at least one salt is an organic acid salt, drying the mixed salts, and then heating the resultant mixed salts to a temperature between 500 and 950 C. The temperature is maintained for a time sufficient to form a substantially orthorhombic superconducting composition. The method achieves good results with only one heating step. The presence of at least one organic salt causes carbonate and nitrate salts of A, Q and Cu to convert to oxides at temperatures between 300 and 400 C. With lower processing temperatures, semiconductor materials and superconducting materials can be processed together. Keywords Patents. AW
- Electricity and Magnetism
- Solid State Physics