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

被引：100

作者：

Nariki, S ^{[1
]}

Seo, SJ ^{[1
]}

Sakai, N ^{[1
]}

Murakami, M ^{[1
]}

机构：

[1] Int Superconduct Technol Ctr, Superconduct Res Lab, Minato Ku, Tokyo 1050023, Japan

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2000年 / 13卷 / 06期

关键词：

D O I：

10.1088/0953-2048/13/6/330

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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 degrees 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.

引用

页码：778 / 784

页数：7

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