Method of producing superconducting fibers of bismuth strontium calcium copper oxide (Bi(2212) and Bi(2223))

Patent · Tue Oct 01 00:00:00 EDT 1991

OSTI ID:868005

Schwartzkopf, Louis A ^[1]

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1. Mankato, MN

Fibers of Bi(2212) have been produce by pendant drop melt extraction. This technique involves the end of a rod of Bi(2212) melted with a hydrogen-oxygen torch, followed by lowering onto the edge of a spinning wheel. The fibers are up to 15 cm in length with the usual lateral dimensions, ranging from 20 um to 30 um. The fibers require a heat treatment to make them superconducting.

• Research Organization: Ames Laboratory (AMES), Ames, IA; Iowa State University, Ames, IA (US)
• DOE Contract Number: W-7405-ENG-82
• Assignee: Iowa State University Research Foundation, Inc. (Ames, IA)
• Patent Number(s): US 5053384
• Application Number: 07/492,932
• OSTI ID: 868005
• Country of Publication: United States
• Language: English

Related Subjects

/505/29/148/428/
15
20
2212
2223
30
bismuth
calcium
cm
conducting fiber
copper
copper oxide
dimensions
drop
drop melt
edge
extraction
fibers
followed
heat
heat treatment
hydrogen-oxygen
hydrogen-oxygen torch
involves
lateral
lateral dimensions
length
lowering
melt
melt extraction
melted
method
oxide
pendant
pendant drop
produce
producing
producing superconducting
ranging
require
rod
spinning
strontium
strontium calcium
superconducting
superconducting fiber
superconducting fibers
technique
technique involves
torch
treatment
wheel