Study on emerging bulk materials for application of new high-temperature superconductors
| Project/Area Number |
18H01699
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 26020:Inorganic materials and properties-related
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| Research Institution | Tokyo University of Agriculture and Technology |
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Principal Investigator |
Yamamoto Akiyasu 東京農工大学, 工学(系)研究科(研究院), 准教授 (20581995)
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| Project Period (FY) |
2018-04-01 – 2021-03-31
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| Project Status |
Completed (Fiscal Year 2020)
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| Budget Amount *help |
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2020: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2019: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2018: ¥9,230,000 (Direct Cost: ¥7,100,000、Indirect Cost: ¥2,130,000)
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| Keywords | 超伝導材料 / バルク / 超伝導 / バルク材料 / 磁場応用 / 磁石 / 鉄系 / MgB2 |
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| Outline of Final Research Achievements |
Magnesium Vapor Transport method (MVT method) has been developed, in which magnesium vapor is treated with boron to obtain MgB2 superconducting polycrystalline bulks. The obtained disk-shaped MgB2 bulk had high packing factor and high purity. The critical current density Jc is about twice as high as a sample produced by the conventional in situ technique, due to the reduction of voids and impurities. Trapped field of 1 T was measured at 10 K. Our results show that MVT method is one of the most effective techniques to extract superior trapped field performance of polycrystalline bulk MgB2 magnets through enhancing circulating supercurrent density and bulk size both of which are essential for high field trapped field magnets.
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| Academic Significance and Societal Importance of the Research Achievements |
本研究では、日本で発見された新しい高温超伝導体の応用に向けて、バルク（塊状）材料の合成に関する研究を行った。マグネシウムの蒸気を活用してバルク材料を合成する新しいプロセスを発明し、従来よりも高性能な超伝導体のバルクを得ることに成功した。この成果は、希少な寒剤を必要とせずに高温で動作可能な、コンパクトな超伝導機器の応用につながるものと期待される。
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Report
(4 results)
Research Products
(75 results)
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[Presentation] Recent progress on the development of K-doped Ba122 bulk superconductors2020
Author(s)
Akiyasu Yamamoto1,2,8, Shinnosuke Tokuta1,8, Yuta Hasegawa1, Rikuta Fujii1, Yuki Okada1, Yusuke Shimada3,8, Hikaru Saito4,8, Satoshi Hata4,5,8, Akimitsu Ishii6,8, Akinori Yamanaka6,8, Kazumasa Iida7,8
Organizer
33rd International Symposium on Superconductivity
Related Report
Int'l Joint Research / Invited
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