High Jc YBCO superconductors prepared by the powder melting process
Conference
·
· IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)
OSTI ID:5932186
- Northwest Inst. for Nonferrous Metal Research, P.O. Box 71, Baoji, Shaanxi 721014 (CN)
This paper reports on the development of a method named powders melting process (PMP) to prepare high Jc YBCO superconductors. The YBCO conductors have been fabricated through continuous zone melting and unidirectional solidification process using precursor powders of Y{sub 2}BaCuO{sub 5} (211) phase and Ba-Cu-O as starting material. The transport Jc values of the samples measured by standard continuous d.c. four-probe method exceed 20000 A/cm{sup 2} at 77K, 1T, and 12000 A/cm{sup 2} at 77K, 4T. The microstructure investigations indicate that the 123 grains are well oriented, fine and dispersive 211 particles remained in the samples. The YBCO conductor with various dimensions 0.2-5 {times} 0.2-5 {times} 30-100 mm{sup 3} can be fabricated by the PMP method. This new approach will be potentially beneficial for fabricating oxide conductors with metal substrates since its melting temperature is lower than that of other melt process by about 100{degrees}C.
- OSTI ID:
- 5932186
- Report Number(s):
- CONF-900944--
- Conference Information:
- Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) Journal Volume: 27:2
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360207 -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CRYSTAL STRUCTURE
CURRENT DENSITY
CURRENTS
ELECTRIC CURRENTS
ELEMENTS
FABRICATION
GRAIN ORIENTATION
MELTING
METALS
MICROSTRUCTURE
ORIENTATION
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
POWDERS
SUBSTRATES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
ZONE MELTING
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360207 -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CRYSTAL STRUCTURE
CURRENT DENSITY
CURRENTS
ELECTRIC CURRENTS
ELEMENTS
FABRICATION
GRAIN ORIENTATION
MELTING
METALS
MICROSTRUCTURE
ORIENTATION
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
POWDERS
SUBSTRATES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
ZONE MELTING