Synthesis of Bi-Ca-Sr-Cu-O superconductive material

Patent · Tue Mar 17 00:00:00 EST 1992

OSTI ID:5223041

Arendt, R H

This patent describes a process for making a sinterable superconductive composition in powder form having the formula Bi{sub 2}CaSr{sub 2}Cu{sub 2}O{sub x} where x is from about 7.5 to about 8.5. It comprises forming an admixture comprising an alkali metal chloride solvent material selected from the group consisting of sodium chloride and potassium chloride and mixtures thereof, and the oxide or oxide precursors of bismuth, calcium, strontium, and copper in amounts sufficient to form the composition by reaction, heating the admixture to a temperature sufficient to melt the alkali metal chloride, dissolve the oxides of bismuth, calcium, strontium and copper and form the superconductive composition, maintaining the temperature to continuously dissolve reactant oxides or oxide precursors until substantially consumed by formation and precipitation of the composition from the reactant-saturated solvent material; cooling the molten mass to a solid; separating and recovering the superconductive composition by dissolving the alkali metal chloride solvent material in water; and comminuting the superconductive composition to produce powder.

• Assignee: General Electric Co., Schenectady, NY (United States)
• Patent Number(s): US 5096879; A
• Application Number: PPN: US 7-399197
• OSTI ID: 5223041
• Resource Relation: Patent File Date: 28 Aug 1989
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
BISMUTH COMPOUNDS
SUPERCONDUCTIVITY
CUPRATES
POWDERS
SYNTHESIS
SUPERCONDUCTORS
CHEMICAL COMPOSITION
COPPER COMPOUNDS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
TRANSITION ELEMENT COMPOUNDS
665412* - Superconducting Devices- (1992-)
360207 - Ceramics
Cermets
& Refractories- Superconducting Properties- (1992-)
360202 - Ceramics
Cermets
& Refractories- Structure & Phase Studies
360201 - Ceramics
Cermets
& Refractories- Preparation & Fabrication