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Synthesis of Bi-Pb-Ca-Sr-Cu-O oriented polycrystal superconductor

Patent ·
OSTI ID:5606276
;

This patent describes a process for making oriented superconductive crystalline Bi{sub 2{minus}y}Pb{sub y}Ca{sub 2}Sr{sub 2}Cu{sub 3} O{sub 10{plus minus}z} in which y is from 0.1 to 0.5 and z is from zero to less than 1. It comprises forming a slurry comprising an organic liquid vehicle, Bi{sub 2}CaSr{sub 2}Cu{sub 2}O{sub 8{plus minus}x} where x is from 0 to 0.5, Ca{sub 2}CuO{sub 3}, cupric oxide, and lead oxide; simultaneously removing the liquid vehicle while aligning the Bi{sub 2}CaSr{sub 2}Cu{sub 2} O{sub 8{plus minus}x} with substantially parallel c-axes by means of an external magnetic field; heating the resulting admixture at a temperature between about 820{degrees} C and 860{degrees} C to convert aligned Bi{sub 2}CaSr{sub 2}Cu{sub 2}O{sub 8{plus minus}x} to aligned Bi{sub 2{minus}y}Pb{sub y}Ca{sub 2}Sr{sub 2}Cu{sub 3}O{sub 10{plus minus}z}.

Assignee:
General Electric Co., Schenectady, NY (United States)
Patent Number(s):
US 5057486; A
Application Number:
PPN: US 7-489309A
OSTI ID:
5606276
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360207 -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
CRYSTALS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FABRICATION
GRAIN ORIENTATION
LEAD COMPOUNDS
LEAD OXIDES
MICROSTRUCTURE
ORIENTATION
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLYCRYSTALS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS