Enhancement of performance in PIT-processed MgB_2 superconducting tapes by chemical solution process

化学溶液法提高PIT处理MgB_2超导带材的性能

• 批准号: 20560312
• 负责人: FUJII Hiroki
• 金额: $ 3.08万
• 依托单位: National Institute for Materials Science
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20560312/
• 关键词: 電子; 電気材料工学; 二硼化マグネシウム; 超伝導線材; 結晶粒間結合; 溶液処理; 炭素置換; パウダー・イン・チューブ法

The parameters of temperature and concentration of organic acid solutions with which filling MgB_2 powder is treated for powder-in-tube (PIT)-processed tapes were investigated. With increasing the concentration, the improvement in critical current density (Jc) property of tapes is enhanced. On the other hand, the Jc improvement is smaller at high temperature. The use of MgB_2-xCx powder as filling powder deteriorates the Jc property of tapes because unreacted carbon acts as weak coupling. We have also established an alternative preparation route for MgB_2 using B source except high-quality amorphous B on which US export controls are imposed.

研究了管内粉体(PIT)加工带填充MgB_2粉末的处理温度和有机酸溶液浓度参数。随着浓度的增加，胶带的临界电流密度（Jc）性能的改善增强。另一方面，在高温下Jc改善较小。使用MgB_2-xCx粉末作为填充粉末会恶化带的Jc性能，因为未反应的碳充当弱耦合作用。我们还建立了除美国出口管制的优质非晶硼以外的硼源制备MgB_2的替代路线。

项目成果

Grain coupling and critical current density in Fe-sheathed carbon-substituted MgB_2 tapes fabricated through an ex situ process using chemically treated powder

使用化学处理粉末通过异位工艺制造铁护套碳取代 MgB_2 带中的晶粒耦合和临界电流密度

• 发表时间: 2008
• 期刊: Supercond.Sci.Technol. 21
• 作者: H.Fujii;K.Togano;K.Ozawa
• 通讯作者: K.Ozawa

Mg-B-H(-C-O)系前駆体の熱分解によるMgB_2の作製

Mg-B-H(-C-O)前驱体热分解制备MgB_2

• 发表时间: 2010
• 作者: 藤井宏樹;ら
• 通讯作者: ら

Improved critical current densities in ex-situ processed MgB_<2-x>C_x tapes using powders treated in chemical solutions

使用化学溶液处理的粉末提高异位加工的 MgB_<2-x>C_x 带的临界电流密度

• 发表时间: 2009
• 期刊: IEEE Transactions on Applied Superconductivity (ASC'08) vol.19, No.3
• 作者: H.Fujii;K.Togano;H.Kumakura;K.Ozawa
• 通讯作者: K.Ozawa

溶液処理した粉末を用いて作製したex-situ法TaシースMgB_2超伝導線材の特性

固溶粉末异位Ta护套MgB_2超导线材特性

• 发表时间: 2010
• 作者: 藤井宏樹;ら
• 通讯作者: ら

Effect of temperature and concentration of solution in chemical treatment for MgB2 powder on the Jc–B property of ex situ processed MgB2 superconducting tapes

MgB2粉末化学处理温度和溶液浓度对异位处理MgB2超导带材Jc-B性能的影响

• DOI: 10.1016/j.physc.2010.01.065
• 发表时间: 2010
• 期刊: Physica C-superconductivity and Its Applications
• 影响因子: 1.7
• 作者: H. Fujii;K. Ozawa
• 通讯作者: K. Ozawa