| Project/Area Number |
25420302
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Electronic materials/Electric materials
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| Research Institution | National Institute of Technology, Toyota College |
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Principal Investigator |
TSUKAMOTO Takehiko 豊田工業高等専門学校, 電気・電子システム工学科, 教授 (10217284)
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| Co-Investigator(Kenkyū-buntansha) |
OIKAWA Dai 豊田工業高等専門学校, 電気・電子システム工学科, 助教 (40707808)
SUGIURA Toko 豊田工業高等専門学校, 電気・電子システム工学科, 教授 (70206407)
ANDOH Hiroya 豊田工業高等専門学校, 情報工学科, 教授 (30212674)
室谷 英彰 徳山工業高等専門学校, 情報電子工学科, 助教 (20612906)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | ビスマス系超電導体 / Melt-Casting法 / 炭酸カリウム添加 / 臨界電流 / n値 / クエンチ特性 / 事故電流限流器 / 抵抗温度特性 / 限流器 |
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| Outline of Final Research Achievements |
We have investigated the transport and quench properties of Bi-2212 samples doped with K2CO3 and fabricated by the melt casting process (MCP). The critical current and the n values were varied by K2CO3 doping. The Bi-2212 doped with 2.0 mass% K2CO3 was demonstrated to be best suited for current-limiting device applications because it exhibited the largest n value. Furthermore, the critical current was improved by the addition of appropriate quantities of K2CO3. The critical current density Jc for the best sample is about 300 A/cm2. The frequency dependence of the critical current was measured for the MCP sample. The critical current was found to slightly decrease with increasing frequency, owing to the influence of a nonuniform current density distribution in the radial direction of the MCP samples. Then observed critical current and critical temperature had distribution in length direction.
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