High Jc YBCO superconductors prepared by the powder melting process

Conference · Fri Mar 01 00:00:00 EST 1991 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:5932186

Zhou, L; Zhang, P; Ji, P; Wang, K; Wang, J; Wu, X ^[1]

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1. 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-; CODEN: IEMGA
• Journal Information: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States), Vol. 27:2; Conference: 1990 applied superconductivity conference, Snowmass, CO (United States), 24-28 Sep 1990; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
CRITICAL CURRENT
FABRICATION
MICROSTRUCTURE
COPPER OXIDES
YTTRIUM OXIDES
CURRENT DENSITY
GRAIN ORIENTATION
METALS
POWDERS
SUBSTRATES
ZONE MELTING
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTAL STRUCTURE
CURRENTS
ELECTRIC CURRENTS
ELEMENTS
MELTING
ORIENTATION
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360201* - Ceramics
Cermets
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360207 - Ceramics
Cermets
& Refractories- Superconducting Properties- (1992-)