| Budget Amount *help |
¥22,490,000 (Direct Cost: ¥17,300,000、Indirect Cost: ¥5,190,000)
Fiscal Year 2010: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2009: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2008: ¥13,520,000 (Direct Cost: ¥10,400,000、Indirect Cost: ¥3,120,000)
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| Research Abstract |
The aim of this study is development of Ag-sheathed bismuth-based (Bi2223)high-T_c superconducting tapes with low-AC loss by introducing interfilamentary oxide resistive barriers. Both Ca_2CuO_3 and SrZrO_3 have little side effect of transport property of a Bi2223 tape, SrZrO_3 is more effective to increase matrix resistivity and also to suppress the interfilamentary electromagnetic coupling under an AC external field. By controlling geometrical parameter of a tape with oxide barriers, AC losses (50Hz, 50mT) at 77 K are reduced by 20% in a parallel transverse field while by 50% in a perpendicular field, compared with a conventional Bi2223 tape with fully coupled filaments.
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