Melt processing of YBaCuO superconductors and critical currents

Journal Article · Thu Feb 01 04:00:00 EST 1990 · Modern Physics Letters B; (USA)

DOI:https://doi.org/10.1142/S0217984990000234· OSTI ID:6427223

Murakami, M ^[1]

---

1. International Superconductivity Technology Center, Superconductivity Research Laboratory, 1-10-13 Shinonome, Koto-ku, Tokyo 135 (JP)

In the Y-Ba-Cu-O system, the superconducting phase is produced by a peritectic reaction: Y{sub 2}BaCuO{sub 5} + L {r arrow} 2YBa{sub 2}Cu{sub 3}O{sub x}(123). In order to promote the continuous growth of the 123 phase, uniform distribution of 211 in the liquid is required. In this review, the author presents the melt process which enables them to achieve fine dispersion of 211 in the liquid. Large 123 crystals can be grown from this precursor structure by slow cooling in temperature gradient. As a result of incomplete peritectic reaction, the crystals contain fine 211 inclusions. The fine dispersion of 211 inclusions in the 123 matrix is considered to have three beneficial effects: to suppress crack formations; to promote oxygen diffusion; and to provide pinning centers. The author proposes the application of such crystals as superconducting permanent magnet.

• OSTI ID: 6427223
• Journal Information: Modern Physics Letters B; (USA), Journal Name: Modern Physics Letters B; (USA) Vol. 4:3; ISSN MPLBE; ISSN 0217-9849
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
426001* -- Engineering-- Superconducting Devices & Circuits-- (1990-)
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CREEP
CRITICAL CURRENT
CURRENTS
DISLOCATION PINNING
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
ELECTROMAGNETS
EQUIPMENT
MAGNETIC FLUX
MAGNETIZATION
MAGNETS
MECHANICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHASE STUDIES
PHYSICAL PROPERTIES
SUPERCONDUCTING DEVICES
SUPERCONDUCTING MAGNETS
SUPERCONDUCTIVITY
TEMPERATURE GRADIENTS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS