| Optimization of sintering parameters for fabrication of Ag-sheathed FeSe superconducting wires | |
| Alternative Title | Optimization 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 Publication | RARE METALS
 |
| ISSN | 1001-0521 |
| Volume | 37Issue:5Pages:433-438 |
| Abstract | 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. |
| Other Abstract | 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. |
| Keyword | 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 |
| Indexed By | CSCD |
| Language | 英语 |
| Funding Project | [National ITER Program of China] |
| CSCD ID | CSCD:6339861 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/146166 |
| Collection | 中国科学院金属研究所 |
| Affiliation | 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 |
| 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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