Fabrication of superconducting YBa sub 2 Cu sub 3 O sub 7 minus sub x fibers by the sol-gel method using metal alkoxides
- 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), Journal Name: Journal of Materials Research; (United States) Vol. 6:8; ISSN JMREE; ISSN 0884-2914
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
ALKALINE EARTH METAL COMPOUNDS
AMINES
AMMONIUM COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COLLOIDS
COPPER COMPOUNDS
COPPER OXIDES
DISPERSIONS
FABRICATION
FIBERS
HIGH-TC SUPERCONDUCTORS
INFRARED SPECTRA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PRECIPITATION
QUATERNARY COMPOUNDS
SEPARATION PROCESSES
SOLS
SPECTRA
SPECTROSCOPY
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
X-RAY SPECTROSCOPY
YTTRIUM COMPOUNDS
YTTRIUM OXIDES