Improvement for magnesium diboride tapes via ex-situ PIT process

• Project/Area Number: 18760498
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Physical properties of metals
• Research Institution: National Institute for Materials Science
• Principal Investigator: NAKANE Takayuki National Institute for Materials Science, 超伝導材料センター, 主任研究員 (40354302)
• Project Period (FY): 2006 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥3,750,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥150,000); Fiscal Year 2008: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2007: ¥1,500,000 (Direct Cost: ¥1,500,000); Fiscal Year 2006: ¥1,600,000 (Direct Cost: ¥1,600,000)
• Keywords: 超伝導材料・素子 / 化学工学

Research Abstract

熱処理を必要としない手法(Ex-situ法)で作製するMgB2超伝導線材の研究を行い、この線材の高性能化には、研究当初に重要視されていた結晶性の低いMgB2粉体ではなく、粒内の臨界電流密度が高く表面?化が少ない粉体を原料に用いることが重要であることを明らかにした。また、MgB2粉体の作製手法を化学的に行う新規技術を開発し、通常600度以上で作製するMgB2粉体を200度未満の低温で調整することに成功した。この技術は、原理的にナノ微粒子化や大量合成が可能な上に、入手困難なボロン粉末を必要としない等の利点もある。

Research Products

• [Journal Article] Evaluation of the effect of area factors on the grain connectivity of ex-situ MgB2 cores (2009)
  • Author(s): T. Nakane and H. Kumakura
  • Journal Title: IEEE Trans. Appl. Supercond (in press)
• [Journal Article] Preparation of MgB2 powder for ex-situ tape with high Jc-B performance (2008)
  • Author(s): T. Nakane and H. Kumakura
  • Journal Title: Journal of Materials Research 23 Pages: 486-493
  • Peer Reviewed
• [Journal Article] Pressurizing effect for the precursor mixtures of starting MgB2 powder on the Jc-B performance of product ex-situ tape (2008)
  • Author(s): T. Nakane, K. Takahashi, T. Kuroda and H. Kumakura
  • Journal Title: Physica C 468 Pages: 1805-1808
  • Peer Reviewed
• [Journal Article] Preparation of MgB_2 powder for ex-situ tape with high Jc-B performance (2008)
  • Author(s): T. Nakane and H. Kumakura
  • Journal Title: Journal of Materials Research 23 Pages: 486-493
  • Peer Reviewed
• [Journal Article] Pressurizing effect for the precursor mixtures of starting MgB_2 powder on the Jc-B performance of product ex-situ tape (2008)
  • Author(s): T. Nakane, K. Takahashi, T. Kuroda and H. Kumakura
  • Journal Title: Physica C (in press)
  • Peer Reviewed
• [Journal Article] Evaluation of the effect of area factors on the grain connectivity of ex-situ MgB2 cores
  • Author(s): T. Nakane and H. Kumakura
  • Journal Title: IEEE Trans. Appl. Supercond. (in press)
  • Peer Reviewed
• [Presentation] Fabrication and Evaluation of MgB2 Tapes via Ex-Situ PIT Technique (2008)
  • Author(s): T. Nakane, A. Asthana, K. Hashi, M. Murakami, K. Takahashi, H. Abe, T. Shimizu, H. Kitaguchi and H. Kumakura
  • Organizer: The IUMRS-international Conference in Asia 2008
  • Place of Presentation: 名古屋
  • Year and Date: 2008-12-10
• [Presentation] 11B NMR study for the evaluation of residual boron in MgB2 tape (2008)
  • Author(s): T. Nakane, K. Hashi, M. Murakami, H. Abe, T. Shimizu and H. Kumakura
  • Organizer: 21th International Symposium on Superconductivity
  • Place of Presentation: つくば
  • Year and Date: 2008-10-28
• [Presentation] Fabrication and the evaluation of ex-situ MgB2 tapes with different grain connectivity (2008)
  • Author(s): T. Nakane and H. Kumakura
  • Organizer: 2008 Applied Superconducting Conference
  • Place of Presentation: シカゴ
  • Year and Date: 2008-08-18
• [Presentation] Fabrication and the evaluation of ex-situ MgB2 tapes with different gram connectivity (2008)
  • Author(s): T. Nakane and H. Kumakura
  • Organizer: 2008 Applied Superconducting Conference
  • Place of Presentation: シカゴ
  • Year and Date: 2008-08-18
• [Presentation] Guideline for the fabrication and the evaluation of the grain connectivity for obtaining ex-situ MgB2 tapes with high Jc-B performance (2008)
  • Author(s): T. Nakane and H. Kumakura
  • Organizer: IUMRS-international Conference on Electronic Materials 2008
  • Place of Presentation: シドニー
  • Year and Date: 2008-07-28
• [Presentation] Ex-situ線材用MgB2粉体の作製指針 (2007)
  • Author(s): 中根茂行,A.Asthana,高橋健一郎,黒田恒生,熊倉浩明
  • Organizer: 2007年度秋季低温工学・超電導学会
  • Place of Presentation: 仙台
  • Year and Date: 2007-11-20
• [Presentation] Ex-situ線材用MgB_2粉体の作製指針 (2007)
  • Author(s): 中根茂行, A. Asthana, 高橋健一郎, 黒田恒生, 熊倉浩明
  • Organizer: 2007年度秋季低温工学・超電導学会
  • Place of Presentation: 仙台
  • Year and Date: 2007-11-20
• [Presentation] Pressurizing effect for the precursor mixtures of starting MgB2 powder on the Jc-B performance of product ex-situ tape (2007)
  • Author(s): T. Nakane, K. Takahashi, T. Kuroda and H. Kumakura
  • Organizer: 20th International Symposium on Superconductivity
  • Place of Presentation: つくば
  • Year and Date: 2007-11-06
• [Presentation] Pressurizing effect for the precursor mixtures of starting MgB_2 powder on the Jc-B performance of product ex-situ tape (2007)
  • Author(s): T. Nakane, K. Takahashi, T. Kuroda and H. Kumakura
  • Organizer: 20th International Symposium on Superconductivity
  • Place of Presentation: つくば
  • Year and Date: 2007-11-06
• [Presentation] Fabricating guideline for starting powder of ex-situ MgB2 tape (2007)
  • Author(s): T. Nakane and H. Kumakura
  • Organizer: European Conference on Applied Superconductivity 2007
  • Place of Presentation: ブリュッセル
  • Year and Date: 2007-09-18
• [Presentation] Fabricating guideline for starting powder of ex-situ MgB_2 tape / Fabricating guideline for starting powder of ex-situ MgB_2 tape (2007)
  • Author(s): T. Nakane and H. Kumakura
  • Organizer: European Conference on Applied Superconductivity 2007
  • Place of Presentation: ブリュッセル
  • Year and Date: 2007-09-18
• [Presentation] Investigation of the superconductive MgB2 tape for improving the Jc-B performance (2007)
  • Author(s): T. Nakane and H. Kumakura
  • Organizer: The Doyama Symposium on Advanced Materials
  • Place of Presentation: 東京
  • Year and Date: 2007-09-06
• [Presentation] Investigation of the superconductive MgB_2 tape for improving the Jc-B performance (2007)
  • Author(s): T. Nakane, and H. Kumakura
  • Organizer: The Doyama Symposium on Advanced Materials
  • Place of Presentation: 東京
  • Year and Date: 2007-09-06
• [Presentation] Ex-situ MgB2線材用の粉体の作製 (2007)
  • Author(s): 中根茂行,黒田恒生,熊倉浩明
  • Organizer: 2007年度春季低温工学・超電導学会
  • Place of Presentation: 千葉
  • Year and Date: 2007-05-16
• [Presentation] Ex-situ MgB_2線材用の粉体の作製 (2007)
  • Author(s): 中根茂行, 黒田恒生, 熊倉浩明
  • Organizer: 2007年度春季低温工学・超電導学会
  • Place of Presentation: 千葉
  • Year and Date: 2007-05-16