Process for preparing superconductive fibers of high density

Patent · Tue Mar 31 00:00:00 EST 1992

OSTI ID:5230475

Hsu, C H

This patent describes a process for preparing a superconductive fiber of improved critical current density and consisting of MBa{sub 2}Bu{sub 3} superconductive oxide where M is a metal selected from the group consisting of Y, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb and Lu. It comprises: forming a spinnable dispersion of a chemically homogeneous particulate precursor of the superconductive oxide consisting essentially of an amorphous M compound, CuO and barium carbonate in proportions such that the atomic ratio of M:Ba:Cu is 1:2:3 in a solution of an organic polymer in an organic solvent, the dispersion containing at least 70 weight percent of particulate based on the total of polymer and particulate, wherein the particulate precursor is formed by blending an aqueous mixture of M acetate, copper acetate, and a source of barium selected from barium hydroxide and barium acetate, removing excess water, and calcining the product in air; extruding the dispersion into a fiber, and firing the fiber at a temperature of at lest 950{degrees} C to obtain a superconductive fiber.

• Assignee: E.I. Du Pont de Nemours and Co., Wilmington, DE (United States)
• Patent Number(s): US 5100864; A
• Application Number: PPN: US 7-315294
• OSTI ID: 5230475
• Resource Relation: Patent File Date: 24 Feb 1989
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CUPRATES
SYNTHESIS
RARE EARTH COMPOUNDS
SUPERCONDUCTING WIRES
CRITICAL CURRENT
DENSITY
DYSPROSIUM COMPOUNDS
ERBIUM COMPOUNDS
EUROPIUM COMPOUNDS
EXTRUSION
FIBERS
GADOLINIUM COMPOUNDS
HIGH-TC SUPERCONDUCTORS
HOLMIUM COMPOUNDS
MODIFICATIONS
NEODYMIUM COMPOUNDS
SAMARIUM COMPOUNDS
TEMPERATURE RANGE 1000-4000 K
THULIUM COMPOUNDS
YTTRIUM COMPOUNDS
COPPER COMPOUNDS
CURRENTS
ELECTRIC CURRENTS
FABRICATION
MATERIALS WORKING
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SUPERCONDUCTORS
TEMPERATURE RANGE
TRANSITION ELEMENT COMPOUNDS
WIRES
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication
360207 - Ceramics
Cermets
& Refractories- Superconducting Properties- (1992-)