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Premix-PICT拡散法で作製したMgB2超伝導バルク体の臨界電流特性に及ぼす微細組織の影響
| Title: | Premix-PICT拡散法で作製したMgB2超伝導バルク体の臨界電流特性に及ぼす微細組織の影響 |
| Other Titles: | Influences of Microstructure on Critical Current Properties in MgB2 Superconducting Bulk Fabricated using a Premix-PICT Method |
| Authors: | 嶋田, 雄介1 Browse this author | | 大橋, 徹也2 Browse this author | | 波多, 聰3 Browse this author | | 池田, 賢一4 Browse this author →KAKEN DB | | 中島, 英治5 Browse this author | | 望月, 利彦6 Browse this author | | 下山, 淳一7 Browse this author | | 堀井, 滋8 Browse this author | | 岸尾, 光二9 Browse this author |
| Authors(alt): | Shimada, Yusuke1 | | Ohashi, Tetsuya2 | | Hata, Satoshi3 | | Ikeda, Ken-ichi4 | | Nakashima, Hideharu5 | | Mochizuki, Toshihiko6 | | Shimoyama, Jun-ichi7 | | Horii, Shigeru8 | | Kishio, Kohji9 |
| Keywords: | MgB2 bulk | | microstructure | | premix-powder-in-closed-tube (PICT) method | | critical current density | | flux pinning |
| Issue Date: | Dec-2009 |
| Publisher: | 低温工学・超電導学会 |
| Journal Title: | 低温工学 |
| Journal Title(alt): | Journal of the Cryogenic Society of Japan |
| Volume: | 44 |
| Issue: | 12 |
| Start Page: | 613 |
| End Page: | 620 |
| Publisher DOI: | 10.2221/jcsj.44.613 |
| Abstract: | We report relationships between the superconducting properties, microstructure and fabrication conditions in high-density MgB2 bulks fabricated using a premix-powder-in-closed-tube (PICT) method. The microstructure of the MgB2 bulks depends on the crystallinity of the initial B powders; use of crystalline B powders reduces the amount of MgB2 and increases re-sidual B and MgO. The heat treatment condition influences the grain sizes of MgB2 as well as the distribution and grain sizes of MgO. A lower temperature and a shorter duration of heat treatment tend to form fine grains of MgB2 and uniform dispersion of fine MgO particles. These microstructural variations influence the distribution of effective flux pinning centers such as grain boundaries and fine MgO particles. Different types of critical current density behavior as a function of magnetic field were meas-ured. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/75356 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 池田 賢一
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