Design of microstructure in melt-textured bulk superconductors with the employment of granules containing ultra-fine Y2BaCuO5 particles

S. Nariki; N. Sakai; M. Murakami; I. Hirabayashi

doi:10.1016/j.physc.2005.02.062

Design of microstructure in melt-textured bulk superconductors with the employment of granules containing ultra-fine Y₂BaCuO₅ particles

S. Nariki, N. Sakai, M. Murakami, I. Hirabayashi

Research output: Contribution to journal › Conference article › peer-review

2 Citations (Scopus)

Abstract

In melt-textured RE-Ba-Cu-O bulk superconductors, an excessive size reduction of RE211 inclusions results in inhomogeneous distribution of RE211 particles. To reduce such inhomogeneity, we attempted to combine granules containing fine RE211 into the melt-textured RE123 materials. First, we prepared Y-Ba-Cu-O granules containing Y123 and ultra-fine Y211 (0.1 μm in size) powders with organic binder. The size of the granules was about 1.0 mm. Next, Dy-Ba-Cu-O powders containing Dy123 and Dy211 (2 μm in size) were prepared. The Y-Ba-Cu-O granules and Dy-Ba-Cu-O powder were compacted together and melt-processed in air. We found that fine RE211 inclusions were uniformly distributed in this sample, which led to improved spatial homogeneity in critical currents.

Original language	English
Pages (from-to)	532-536
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	426-431
Issue number	I
DOIs	https://doi.org/10.1016/j.physc.2005.02.062
Publication status	Published - 2005 Oct 1
Event	Proceedings of the 17th International Symposium on Superconductivity (ISS 2004) Advances in Supeconductivity - Duration: 2004 Nov 23 → 2004 Nov 25

Keywords

Critical current density
Dy-Ba-Cu-O
Granular particle
Melt-textured bulk
Y-Ba-Cu-O

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1016/j.physc.2005.02.062

Cite this

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title = "Design of microstructure in melt-textured bulk superconductors with the employment of granules containing ultra-fine Y2BaCuO5 particles",

abstract = "In melt-textured RE-Ba-Cu-O bulk superconductors, an excessive size reduction of RE211 inclusions results in inhomogeneous distribution of RE211 particles. To reduce such inhomogeneity, we attempted to combine granules containing fine RE211 into the melt-textured RE123 materials. First, we prepared Y-Ba-Cu-O granules containing Y123 and ultra-fine Y211 (0.1 μm in size) powders with organic binder. The size of the granules was about 1.0 mm. Next, Dy-Ba-Cu-O powders containing Dy123 and Dy211 (2 μm in size) were prepared. The Y-Ba-Cu-O granules and Dy-Ba-Cu-O powder were compacted together and melt-processed in air. We found that fine RE211 inclusions were uniformly distributed in this sample, which led to improved spatial homogeneity in critical currents.",

keywords = "Critical current density, Dy-Ba-Cu-O, Granular particle, Melt-textured bulk, Y-Ba-Cu-O",

author = "S. Nariki and N. Sakai and M. Murakami and I. Hirabayashi",

year = "2005",

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doi = "10.1016/j.physc.2005.02.062",

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journal = "Physica C: Superconductivity and its applications",

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T1 - Design of microstructure in melt-textured bulk superconductors with the employment of granules containing ultra-fine Y2BaCuO5 particles

AU - Nariki, S.

AU - Sakai, N.

AU - Murakami, M.

AU - Hirabayashi, I.

PY - 2005/10/1

Y1 - 2005/10/1

N2 - In melt-textured RE-Ba-Cu-O bulk superconductors, an excessive size reduction of RE211 inclusions results in inhomogeneous distribution of RE211 particles. To reduce such inhomogeneity, we attempted to combine granules containing fine RE211 into the melt-textured RE123 materials. First, we prepared Y-Ba-Cu-O granules containing Y123 and ultra-fine Y211 (0.1 μm in size) powders with organic binder. The size of the granules was about 1.0 mm. Next, Dy-Ba-Cu-O powders containing Dy123 and Dy211 (2 μm in size) were prepared. The Y-Ba-Cu-O granules and Dy-Ba-Cu-O powder were compacted together and melt-processed in air. We found that fine RE211 inclusions were uniformly distributed in this sample, which led to improved spatial homogeneity in critical currents.

AB - In melt-textured RE-Ba-Cu-O bulk superconductors, an excessive size reduction of RE211 inclusions results in inhomogeneous distribution of RE211 particles. To reduce such inhomogeneity, we attempted to combine granules containing fine RE211 into the melt-textured RE123 materials. First, we prepared Y-Ba-Cu-O granules containing Y123 and ultra-fine Y211 (0.1 μm in size) powders with organic binder. The size of the granules was about 1.0 mm. Next, Dy-Ba-Cu-O powders containing Dy123 and Dy211 (2 μm in size) were prepared. The Y-Ba-Cu-O granules and Dy-Ba-Cu-O powder were compacted together and melt-processed in air. We found that fine RE211 inclusions were uniformly distributed in this sample, which led to improved spatial homogeneity in critical currents.

KW - Critical current density

KW - Dy-Ba-Cu-O

KW - Granular particle

KW - Melt-textured bulk

KW - Y-Ba-Cu-O

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