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
Distribution Statement : APPROVED FOR PUBLIC RELEASE