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

Patent · Tue Oct 15 04:00:00 EDT 1991

OSTI ID:5606275

Arendt, R H; Garbauskas, M F

This patent describes a process for producing a solid superconductive material in powder form containing superconductive Bi{sub 2{minus}y}Pb{sub y}Ca{sub 2}Sr{sub 2}Cu{sub 3}P{sub 10{plus minus}Z} phase, in which y ranges from 0.1 to 0.5 and z ranges from zero to less than 1. It comprises: providing a particulate mixture of reactants consisting essentially of Bi{sub 2}CaSr{sub 2}Cu{sub 2}O{sub 8{plus minus}y}, x being between zero and 0.5, Ca{sub 2}CuO{sub 3}, cupric oxide, and lead oxide, in proportions for forming the superconductive phase, the Ca{sub 2}CuO{sub 3} and cupric oxide in the mixture being present in approximately equal molar amounts; heating the mixture in an oxidizing atmosphere at a temperature ranging from about 820{degrees}C to about 860{degrees} C to form a reaction product comprising superconductive phase; cooling the reaction product in an oxidizing atmosphere; and comminuting the reaction product to produce powder.

• Assignee: General Electric Co., Schenectady, NY (United States)
• Patent Number(s): US 5057488; A
• Application Number: PPN: US 7-478393A
• OSTI ID: 5606275
• Country of Publication: United States
• Language: English

Related Subjects

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75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
LEAD COMPOUNDS
LEAD OXIDES
OXIDES
OXYGEN COMPOUNDS
PHASE STUDIES
PHYSICAL PROPERTIES
POWDERS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTIVITY
SUPERCONDUCTORS
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS