Accession Number : ADD014490

Title :   Method of Preparing Superconducting 'Orthorhomibic' -Type Compounds in Bulk Using C1-C6 Alkanoic Acid Salts.

Descriptive Note : Patent, filed 29 Feb 88, Patented 13 Feb 90,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Cooper, John C ; Panayappan, Ramanathan ; Guy, Joseph T

Report Date : 13 Feb 1990

Pagination or Media Count : 7

Abstract : Superconducting compositions of the general formula A(n)Q(m)Cu3O(y) 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)

Descriptors :   *OXIDES, *PATENTS, *SALTS, *SUPERCONDUCTORS, DRYING, HEATING, INORGANIC ACIDS, INORGANIC COMPOUNDS, LOW TEMPERATURE, MATERIALS, MIXING, NITRATES, ORGANIC ACIDS, PROCESSING, SEMICONDUCTORS, TEMPERATURE, CHEMICAL ENGINEERING

Subject Categories : Electricity and Magnetism
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE