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Title: Preparation and composition of superconducting copper oxides based on Ga-O layers

A high temperature superconducting material with the general formula GaSr[sub 2]Ln[sub 1[minus]x]M[sub x]Cu[sub 2]O[sub 7[+-]w] wherein Ln is selected from the group consisting of La, Ce, Pt, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Y and M is selected from the group consisting of C and Sr, 0.2[<=]x[<=]0.4 and w is a small fraction of one. A method of preparing this high temperature superconducting material is provided which includes heating and cooling a mixture to produce a crystalline material which is subsequently fired, ground and annealed at high pressure and temperature in oxygen to establish superconductivity. 14 figures.
Inventors:
; ;
Issue Date:
OSTI Identifier:
6663753
Assignee:
University of Chicago, Chicago, IL (United States); Northwestern University, Evanston, IL (United States) PTO; EDB-95-029493
Patent Number(s):
US 5374611; A
Application Number:
PPN: US 7-956844
Contract Number:
W-31109-ENG-38
Resource Relation:
Patent File Date: 1 Oct 1992
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; HIGH-TC SUPERCONDUCTORS; CHEMICAL COMPOSITION; FABRICATION; CALCIUM OXIDES; CERIUM OXIDES; COPPER OXIDES; DYSPROSIUM OXIDES; ERBIUM OXIDES; EUROPIUM OXIDES; GADOLINIUM OXIDES; GALLIUM OXIDES; HOLMIUM OXIDES; LANTHANUM OXIDES; PLATINUM OXIDES; SAMARIUM OXIDES; STRONTIUM OXIDES; TERBIUM OXIDES; THULIUM OXIDES; YTTERBIUM OXIDES; YTTRIUM OXIDES; ALKALINE EARTH METAL COMPOUNDS; CALCIUM COMPOUNDS; CERIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; DYSPROSIUM COMPOUNDS; ERBIUM COMPOUNDS; EUROPIUM COMPOUNDS; GADOLINIUM COMPOUNDS; GALLIUM COMPOUNDS; HOLMIUM COMPOUNDS; LANTHANUM COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PLATINUM COMPOUNDS; RARE EARTH COMPOUNDS; SAMARIUM COMPOUNDS; STRONTIUM COMPOUNDS; SUPERCONDUCTORS; TERBIUM COMPOUNDS; THULIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; YTTERBIUM COMPOUNDS; YTTRIUM COMPOUNDS 360201* -- Ceramics, Cermets, & Refractories-- Preparation & Fabrication