Tailoring the critical current properties in Cu-sheathed Sr1-xKxFe2As2 superconducting tapes
Tailoring the critical current properties in Cu-sheathed Sr1-xKxFe2As2 superconducting tapes
复制标题
定制铜护套 Sr1-xKxFe2As2 超导带的临界电流特性
DOI：
10.1088/0953-2048/29/9/095006
复制
发表时间：
2016
影响因子：
3.6
通讯作者：
Watanabe Kazuo
中科院分区：
文献类型：
--
作者：
Lin Kaili;Yao Chao;Zhang Xianping;Zhang Qianjun;Huang He;Li Chen;Wang Dongliang;Dong Chiheng;Ma Yanwei;Awaji Satoshi;Watanabe Kazuo
Cu是一种有吸引力的金属，可用作Sr 1− x K x Fe 2 As 2超导导线的护套材料。然而，铜鞘层和超导芯之间的不良反应严重影响了超导性能。在这项工作中，铜护套Sr 1− xKxFe 2As 2磁带在740 ℃的低温下使用热压法制备。研究了烧结保温时间、反应层、微观结构和超导性能之间的系统关系。结果表明，热压60 min的样品具有最高的临界电流密度（Jc），在4.2K下，10 T和26 T下分别为3.5× 104 Acm-2和1.6× 104 Acm-2。在4.2K时，10 T下的工程临界电流密度（Je）大于1.0× 104 Acm-2。这是迄今为止铜护套铁基超导带材的最高J c报告。
Cu is an attractive metal to use as the sheath material for Sr 1− x K x Fe 2 As 2 superconducting wires. However, unfavorable reactions between the Cu sheath and the superconducting core severely affect the superconducting performance. In this work, Cu-sheathed Sr 1− x K x Fe 2 As 2 tapes are fabricated at a low temperature of 740 C using a hot pressing method. A systematic correlation between the sintering holding time, reaction layer, microstructure, and superconducting properties is investigated. It is found that the samples that are hot pressed for 60 min exhibit the highest transport critical current density (J c), ie 3.5× 10 4 A cm− 2 in 10 T and 1.6× 10 4 A cm− 2 in 26 T at 4.2 K, respectively. Furthermore, the engineering critical current density (J e) value of the samples is over 1.0× 10 4 A cm− 2 in 10 T at 4.2 K. This is by far the highest J c reported for Cu-sheathed iron-based superconducting tapes.