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Development of a 7 tesla-class tubular MgB2 bulk magnet with a large bore to achieve a high-resolution MRI device for a mouse experiment

Research Project

Project/Area Number 18K04920
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 29010:Applied physical properties-related
Research InstitutionIwate University

Principal Investigator

Naito Tomoyuki  岩手大学, 理工学部, 教授 (40311683)

Co-Investigator(Kenkyū-buntansha) 藤代 博之  岩手大学, 理工学部, 教授 (90199315)
Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords超伝導バルク磁石 / 二ホウ化マグネシウム / 捕捉磁場 / MgB2超伝導体 / バルク磁石 / NMR / MgB2
Outline of Final Research Achievements

We found out the fabrication condition for an infiltration-reaction processed MgB2 bulk ring trapping 2 tesla-class magnetic field stronger than permanent magnet. A carbon doping improved the trapped field properties of MgB2 bulk around 10 K, a typical operating temperature. We achieved a record-high trapped field of 5.6 tesla for triple-stacked MgB2 disk bulk doped with titanium. For the first time, we succeeded in observing a proton NMR (nuclear magnetic resonance) signal under a magnetic field trapped by a tubular MgB2 bulk magnet, which strongly suggests a potential ability of an MgB2 bulk magnet as a magnetic pole of bench-top NMR device.

Academic Significance and Societal Importance of the Research Achievements

超伝導バルク磁石の社会実装を進めるためには,磁場強度はもちろんのこと用途に応じたサイズや形状を実現する必要がある。従って,低コストである浸透法で大型かつリング形状のMgB2バルクを作製可能となったことは,任意形状のバルクを作製できることを意味しており意義がある。また,炭素やチタンなど不純物元素の添加によってMgB2バルク磁石の特性が向上したことやMgB2バルク磁石中でプロトンの核磁気共鳴信号が観測できたことにより,永久磁石との差別化がより一層明確になったことも超伝導バルク磁石の社会実装を進める上で重要な点である。

Report

(5 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (15 results)

All 2022 2021 2020 2019 Other

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 5 results) Presentation (9 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results) Remarks (1 results)

  • [Journal Article] Trapped field properties of MgB2 bulks prepared via an in-situ infiltration-reaction process using refined boron powders2022

    • Author(s)
      Takahashi Yuhei、Naito Tomoyuki、Fujishiro Hiroyuki
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 32 Issue: 6 Pages: 1-5

    • DOI

      10.1109/tasc.2022.3158641

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Detection of 1H NMR signal in a trapped magnetic field of a compact tubular MgB2 superconductor bulk2021

    • Author(s)
      Takahashi Yuhei、Naito Tomoyuki、Nakamura Takashi、Takahashi Masato
    • Journal Title

      Superconductor Science and Technology

      Volume: 34 Issue: 6 Pages: 06LT02-06LT02

    • DOI

      10.1088/1361-6668/abf66e

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] MgB2超伝導バルク磁石の現状と展望2021

    • Author(s)
      内藤智之,藤代博之
    • Journal Title

      低温工学

      Volume: 56 Issue: 6 Pages: 309-316

    • DOI

      10.2221/jcsj.56.309

    • NAID

      130008119034

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effects of Carbon Doping on Trapped Magnetic Field of MgB2 Bulk Prepared by in-situ Hot Isostatic Pressing Method2020

    • Author(s)
      Naito Tomoyuki、Ogino Arata、Fujishiro Hiroyuki、Awaji Satoshi
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 30 Issue: 4 Pages: 6800406-6800406

    • DOI

      10.1109/tasc.2020.2985355

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] A record-high trapped field of 5.6 T in the stacking of MgB2/TiB2 composite bulks prepared by an in-situ hot isostatic pressing method2020

    • Author(s)
      Naito Tomoyuki、Takahashi Yuhei、Awaji Satoshi
    • Journal Title

      Superconductor Science and Technology

      Volume: 33 Issue: 12 Pages: 125004-125004

    • DOI

      10.1088/1361-6668/abb203

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 円筒状MgB2超伝導バルク磁石を用いた1H NMR信号の検出2021

    • Author(s)
      髙橋裕平,内藤智之,仲村髙志,高橋雅人
    • Organizer
      2021年度春季(第101回)低温工学・超電導学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 無酸素銅板/MgB2超伝導バルク積層のパルス着磁における無酸素銅の効果2021

    • Author(s)
      吉田智貴,内藤智之
    • Organizer
      2021年度春季(第101回)低温工学・超電導学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Trapped field properties of MgB2 bulks prepared via an in-situ infiltration-reaction pro-cess using refined boron powders2021

    • Author(s)
      Y. Takahashi, T. Naito, and H. Fujishiro
    • Organizer
      The 27th International Conference on Magnet Technology
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 無酸素銅板/MgB2超伝導バルク積層のパルス着磁における無酸素銅の効果II2021

    • Author(s)
      吉田智貴,内藤智之
    • Organizer
      2021年度秋季(第102回)低温工学・超電導学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 浸透法で作製した大型MgB2リングバルクの捕捉磁場特性:ボア内磁場均一度の評価2020

    • Author(s)
      髙橋裕平,内藤智之,藤代博之
    • Organizer
      2020年度春季(第99回)低温工学・超電導学会
    • Related Report
      2020 Research-status Report
  • [Presentation] MgB2バルク磁石のFCMおよびPFM法による捕捉磁場特性の最近の進展2020

    • Author(s)
      内藤智之,高橋裕平,平野達也,難波 空,藤代博之,淡路 智
    • Organizer
      2020年度秋季(第100回)低温工学・超電導学会
    • Related Report
      2020 Research-status Report
  • [Presentation] Recent progress in intermetallic compound superconductor bulks capable of trapping strong mag-netic fields2020

    • Author(s)
      T. Naito, Y. Takahashi, K. Amase, H. Fujishiro, A. Kikuchi, and S. Awaji
    • Organizer
      10th ACASC /2nd Asian ICMC/CSSJ Joint Conference
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Effects of carbon doping on trapped magnetic field of MgB2 bulk prepared by in-situ hot isostatic pressing method2019

    • Author(s)
      T. Naito, A. Ogino, H. Fujishiro, and S. Awaji
    • Organizer
      26th International Conference on Magnet Technology (MT-26)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Effects of SiC-doping on the trapped field properties of in-situ HIP-processed MgB2 bulks2019

    • Author(s)
      T. Naito, Y. Takahashi, and H. Fujishiro
    • Organizer
      32nd International Symposium on Superconductivity (ISS2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Remarks] 岩手大学理工学部物理・材料理工学科マテリアルコース藤代・内藤研究室

    • URL

      http://ikebehp.mat.iwate-u.ac.jp/

    • Related Report
      2020 Research-status Report

URL: 

Published: 2018-04-23   Modified: 2023-01-30  

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