2016 Fiscal Year Final Research Report
Development of the technology of next-generation iron-based superconducting wires fabricated by diffusion process
| Project/Area Number |
15H06769
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Energy engineering
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| Research Institution | Kwansei Gakuin University |
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Principal Investigator |
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| Research Collaborator |
TAKANO Yoshihiko
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| Project Period (FY) |
2015-08-28 – 2017-03-31
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| Keywords | 超伝導線材 / 超伝導転移温度 / 結晶粒界 / 化学組成 |
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| Outline of Final Research Achievements |
We have reported that the FeSe superconducting wires fabricated by the Fe-diffusion power-in-tube (PIT) process showed the enhanced superconducting transition temperature Tc ~10.5 K, which is ~2 K higher than that found in bulk materials. In this study, we investigated the influence of the length of the heat-treatment time in the Fe-diffusion PIT process on Tc. The XRD pattern of the reacted layer indicates that the FeSe phase inside the Fe sheath is expectedly synthesized by the Fe-diffusion PIT process. The elemental mapping analysis show that the Fe distribution is homogeneous in the superconducting phase. Also all the wires heat-treated at 800 degree Celsius for 2, 5, 10 hours exhibit enhanced Tc >10 K. These results suggest that successful fabrication of FeSe wires by the Fe-diffusion PIT process is not depend on the length of the heat-treatment time.
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| Free Research Field |
超伝導
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