The effect of oxygen partial pressure on melt growth processing for filamentary Dy-Ba-Cu-O superconductors

被引：2

作者：

Ban, E ^{[1
]}

Ikebe, Y

Matsuoka, Y

Watanabe, K

机构：

[1] Meijo Univ, Dept Mat Sci & Engn, Tempaku Ku, Nagoya, Aichi 4688502, Japan

[2] Tohoku Univ, Mat Res Inst, Aoba Ku, Sendai, Miyagi 9808577, Japan

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2005年 / 15卷 / 02期

关键词：

critical current density; Dy123; filament; magnetic field behavior;

D O I：

10.1109/TASC.2005.848211

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Precursor filaments of Dy-Ba-Cu-O super-conductor were prepared by a solution spinning method and partially melting in an atmosphere gas with various oxygen concentrations. It was found that the transport Jc value at 77 K and 0 T of the filamentary sample was strongly dependent on the partial-melting temperature and gas atmosphere. The samples partially melted under flowing 1 % O-2 + Ar gas exhibited Jc values larger than 10(4) A/cm(2) over a wide temperature range of 980-1040 degrees C and a dense microstructure. The filamentary sample with the starting composition of Dy : Ba : Cu = 1.18 : 2.12 : 3.09 treated at 1020 degrees C under flowing 1 % O-2 + Ar showed a transport Jc value greater than 4.3 x 10(4) A/cm(2) at 77 K and 0 T, and the Jc value of 2.0 x 10(3) A/cm(2) was maintained up to the magnetic fields of 14 T. The samples partially melted in 20 % O-2 + Ar gas and 100 % O-2 gas showed relatively low Jc value of 6.0 x 10(3) A/cm(2) and 1.2 x 102 A/cm(2) at most.

引用

页码：2779 / 2782

页数：4

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