Fabrication of superconducting YBa sub 2 Cu sub 3 O sub 7 minus sub x fibers by the sol-gel method using metal alkoxides

Journal Article · Thu Aug 01 00:00:00 EDT 1991 · Journal of Materials Research; (United States)

DOI:https://doi.org/10.1557/JMR.1991.1629· OSTI ID:5481479

Katayama, S; Sekine, M ^[1]

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1. Colloid Research Institute, 350-1 Ogura, Yahata-higashi-ku, Kiatakyushu 805 (Japan)

Superconducting YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} fibers were fabricated by the sol-gel method using modified metal alkoxides. To prepare a heterometallic alkoxide as a precursor of a homogeneous and viscous sol, Y and Cu alkoxides were modified with ethyl acetoacetate (EAA) and ethylenediamine (en), respectively. Their structures were determined by FT-IR and EXAFS. The heterometallic alkoxide was synthesized by partial hydrolysis of the modified alkoxides and was further hydrolyzed and concentrated to obtain a viscous sol. This sol had good spinability and was spun into gel fibers by a spinning aparatus. The gel fibers had a high oxide content of 61 wt. %. The fiber, fired at 950 {degree}C for 10 h in O{sub 2}, had only closed pores and a dense structure. {ital T}{sub {ital c}} (onset) of this fiber was 94 K.

• OSTI ID: 5481479
• Journal Information: Journal of Materials Research; (United States), Vol. 6:8; ISSN 0884-2914
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
FABRICATION
COPPER OXIDES
X-RAY SPECTROSCOPY
HIGH-TC SUPERCONDUCTORS
YTTRIUM OXIDES
FIBERS
INFRARED SPECTRA
PRECIPITATION
QUATERNARY COMPOUNDS
SOLS
ALKALINE EARTH METAL COMPOUNDS
AMINES
AMMONIUM COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COLLOIDS
COPPER COMPOUNDS
DISPERSIONS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
SEPARATION PROCESSES
SPECTRA
SPECTROSCOPY
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication