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

Patent · Tue Dec 20 00:00:00 EST 1994

OSTI ID:6663753

Dabrowski, B; Vaughey, J T; Poeppelmeier, K R

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.

• DOE Contract Number: W-31109-ENG-38
• Assignee: University of Chicago, Chicago, IL (United States); Northwestern University, Evanston, IL (United States)
• Patent Number(s): US 5374611; A
• Application Number: PPN: US 7-956844
• OSTI ID: 6663753
• Resource Relation: Patent File Date: 1 Oct 1992
• Country of Publication: United States
• Language: English

Related Subjects

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
&amp; Refractories- Preparation &amp; Fabrication