Optimization of sintering parameters for fabrication of Ag-sheathed FeSe superconducting wires

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	Optimization of sintering parameters for fabrication of Ag-sheathed FeSe superconducting wires
其他题名	Optimization of sintering parameters for fabrication of Ag-sheathed FeSe superconducting wires
	Feng JianQing 1; Zhang ShengNan 1; Liu JiXing 2; Shao BoTao 3; Li ChengShan 1; Liang Ming 1; Zhang PingXiang 1
	2018
发表期刊	RARE METALS
ISSN	1001-0521
卷号	37 期号:5 页码:433-438
摘要	Ag-sheathed Fe1.05Se superconducting wires were fabricated with ex-situ powder in tube (PIT) process. Fe and Se powders with molar ratio of 1.05 were firstly mixed and sintered under 600 A degrees C for 12 h to form precursor powders. Owing to the complex Fe-Se binary phase diagram, both superconducting tetragonal FeSe and non-superconducting hexagonal FeSe could be formed simultaneously during sintering. Aiming at the reduction of hexagonal FeSe phase content and higher superconducting phase volume, the influences of key parameters, including sintering time, cooling rate and heating rate, on the phase composition of sintered wires were systematically studied. Optimal sintering parameters are obtained, and the maximum tetragonal FeSe phase content of similar to 97% is achieved. Meanwhile, the effects of packing density of precursor powders on the phase composition of final wires were also discussed. Owing to the shorter length of diffusion path, more tetragonal FeSe was formed with higher packing density. The superconducting transition signal with critical temperature of similar to 7.5 K was obtained, which proved the effectiveness of our optimal sintering process.
其他摘要	Ag-sheathed Fe_(1.05)Se superconducting wires were fabricated with ex-situ powder in tube (PIT) process. Fe and Se powders with molar ratio of 1.05 were firstly mixed and sintered under 600 ℃ for 12 h to form precursor powders. Owing to the complex Fe–Se binary phase diagram, both superconducting tetragonal FeSe and nonsuperconducting hexagonal FeSe could be formed simultaneously during sintering. Aiming at the reduction of hexagonal FeSe phase content and higher superconducting phase volume, the influences of key parameters, including sintering time, cooling rate and heating rate, on the phase composition of sintered wires were systematically studied. Optimal sintering parameters are obtained, and the maximum tetragonal FeSe phase content of ~ 97% is achieved. Meanwhile, the effects of packing density of precursor powders on the phase composition of final wires were also discussed. Owing to the shorter length of diffusion path, more tetragonal FeSe was formed with higher packing density. The superconducting transition signal with critical temperature of ~ 7.5 K was obtained, which proved the effectiveness of our optimal sintering process.
关键词	PBO-TYPE STRUCTURE PHASE-DIAGRAM THIN-FILMS FESE1-XTEX MICROSTRUCTURE TEMPERATURE PRESSURE FESE0.5TE0.5 ROUTE TAPES Superconductors FeSe Powder in tube Phase composition Superconducting transition
收录类别	CSCD
语种	英语
资助项目	[National ITER Program of China]
CSCD记录号	CSCD:6339861
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/146166
专题	中国科学院金属研究所
作者单位	1.中国科学院近代物理研究所 2.中国科学院金属研究所 3.中国科学院地球环境研究所
推荐引用方式 GB/T 7714	Feng JianQing,Zhang ShengNan,Liu JiXing,et al. Optimization of sintering parameters for fabrication of Ag-sheathed FeSe superconducting wires[J]. RARE METALS,2018,37(5):433-438.
APA	Feng JianQing.,Zhang ShengNan.,Liu JiXing.,Shao BoTao.,Li ChengShan.,...&Zhang PingXiang.(2018).Optimization of sintering parameters for fabrication of Ag-sheathed FeSe superconducting wires.RARE METALS,37(5),433-438.
MLA	Feng JianQing,et al."Optimization of sintering parameters for fabrication of Ag-sheathed FeSe superconducting wires".RARE METALS 37.5(2018):433-438.