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Optimization of sintering parameters for fabrication of Ag-sheathed FeSe superconducting wires
Alternative TitleOptimization of sintering parameters for fabrication of Ag-sheathed FeSe superconducting wires
Feng JianQing1; Zhang ShengNan1; Liu JiXing2; Shao BoTao3; Li ChengShan1; Liang Ming1; Zhang PingXiang1
2018
Source PublicationRARE METALS
ISSN1001-0521
Volume37Issue:5Pages:433-438
AbstractAg-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.
Other AbstractAg-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.
KeywordPBO-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
Indexed ByCSCD
Language英语
Funding Project[National ITER Program of China]
CSCD IDCSCD:6339861
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/146166
Collection中国科学院金属研究所
Affiliation1.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
Recommended Citation
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.
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