Influence of the size of Gd211 starting powder on the critical current density of Gd-Ba-Cu-O bulk superconductor

S. Nariki; S. J. Seo; N. Sakai; M. Murakami

doi:10.1088/0953-2048/13/6/330

Influence of the size of Gd211 starting powder on the critical current density of Gd-Ba-Cu-O bulk superconductor

S. Nariki, S. J. Seo, N. Sakai, M. Murakami

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

90 Citations (Scopus)

Abstract

The relationship between the particle size of Gd211 powder in the precursor and the particle size of Gd211 inclusions in Gd-Ba-Cu-O bulk has been investigated. Gd211 starting powders with various diameters were prepared by the calcination of Gd₂O₃, BaO₂ and CuO powders at different temperatures between 800 and 1000°C. The particle size of Gd211 in the melt-grown bulk was proportional to the particle size of the initial Gd211 powder. In conclusion, the employment of fine Gd211 powder led to a size reduction of 211 particles in the bulk, while largely enhancing the J_c values in low magnetic fields. A large Gd-Ba-Cu-O/Ag bulk sample, 32 mm in diameter, could also be fabricated by the hot-seeding method. The maximum trapped field value revealed 1.5 T at 77 K.

Original language	English
Pages (from-to)	778-784
Number of pages	7
Journal	Superconductor Science and Technology
Volume	13
Issue number	6
DOIs	https://doi.org/10.1088/0953-2048/13/6/330
Publication status	Published - 2000 Jun 1
Externally published	Yes
Event	The 2nd International Workshop on the Processing and Applications of Superconducting (RE)CBO Large Grain Materials - Morioka, Jpn Duration: 1999 Oct 19 → 1999 Oct 22

ASJC Scopus subject areas

Ceramics and Composites
Condensed Matter Physics
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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title = "Influence of the size of Gd211 starting powder on the critical current density of Gd-Ba-Cu-O bulk superconductor",

abstract = "The relationship between the particle size of Gd211 powder in the precursor and the particle size of Gd211 inclusions in Gd-Ba-Cu-O bulk has been investigated. Gd211 starting powders with various diameters were prepared by the calcination of Gd2O3, BaO2 and CuO powders at different temperatures between 800 and 1000°C. The particle size of Gd211 in the melt-grown bulk was proportional to the particle size of the initial Gd211 powder. In conclusion, the employment of fine Gd211 powder led to a size reduction of 211 particles in the bulk, while largely enhancing the Jc values in low magnetic fields. A large Gd-Ba-Cu-O/Ag bulk sample, 32 mm in diameter, could also be fabricated by the hot-seeding method. The maximum trapped field value revealed 1.5 T at 77 K.",

author = "S. Nariki and Seo, {S. J.} and N. Sakai and M. Murakami",

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TY - JOUR

T1 - Influence of the size of Gd211 starting powder on the critical current density of Gd-Ba-Cu-O bulk superconductor

AU - Nariki, S.

AU - Seo, S. J.

AU - Sakai, N.

AU - Murakami, M.

PY - 2000/6/1

Y1 - 2000/6/1

N2 - The relationship between the particle size of Gd211 powder in the precursor and the particle size of Gd211 inclusions in Gd-Ba-Cu-O bulk has been investigated. Gd211 starting powders with various diameters were prepared by the calcination of Gd2O3, BaO2 and CuO powders at different temperatures between 800 and 1000°C. The particle size of Gd211 in the melt-grown bulk was proportional to the particle size of the initial Gd211 powder. In conclusion, the employment of fine Gd211 powder led to a size reduction of 211 particles in the bulk, while largely enhancing the Jc values in low magnetic fields. A large Gd-Ba-Cu-O/Ag bulk sample, 32 mm in diameter, could also be fabricated by the hot-seeding method. The maximum trapped field value revealed 1.5 T at 77 K.

AB - The relationship between the particle size of Gd211 powder in the precursor and the particle size of Gd211 inclusions in Gd-Ba-Cu-O bulk has been investigated. Gd211 starting powders with various diameters were prepared by the calcination of Gd2O3, BaO2 and CuO powders at different temperatures between 800 and 1000°C. The particle size of Gd211 in the melt-grown bulk was proportional to the particle size of the initial Gd211 powder. In conclusion, the employment of fine Gd211 powder led to a size reduction of 211 particles in the bulk, while largely enhancing the Jc values in low magnetic fields. A large Gd-Ba-Cu-O/Ag bulk sample, 32 mm in diameter, could also be fabricated by the hot-seeding method. The maximum trapped field value revealed 1.5 T at 77 K.

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T2 - The 2nd International Workshop on the Processing and Applications of Superconducting (RE)CBO Large Grain Materials

Y2 - 19 October 1999 through 22 October 1999

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