Accession Number : ADD015422

Title :   Method of Making Substantially Single Phase Superconducting Oxide Ceramics Having a TC Above 85 Degrees.

Descriptive Note : Patent, Filed 19 Sep 90, patented 21 Apr 92,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Quadri, Syed B ; Toth, Louis E ; Osofsky, Michael S ; Lawrence, Steven H ; Gubser, Donald U

Report Date : 21 Apr 1992

Pagination or Media Count : 7

Abstract : A substantially single phase superconducting composition is formed from a of 1:2:3 molar ratio of fine powders of a superconducting rare earth oxide, CuO, and BaCO3. The mixed powders and shaped articles formed from the mixed powders are calcined, sintered, and cooled in an oxygen containing atmosphere. The cooling step is done slowly to convert the sample to the orthorhombic structure and to improve the superconducting properties. The article formed is a substantially single phase superconducting composition.

Descriptors :   *SUPERCONDUCTIVITY, *CERAMIC MATERIALS, *PATENTS, ATMOSPHERES, COOLING, FINES, OXIDES, OXYGEN, PHASE, POWDERS, RATIOS, STRUCTURES, RARE EARTH COMPOUNDS, CHEMICAL COMPOSITION, SINTERING

Subject Categories : Ceramics, Refractories and Glass
      Electricity and Magnetism
      Inorganic Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE