| Budget Amount *help |
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2020: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2019: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2018: ¥9,230,000 (Direct Cost: ¥7,100,000、Indirect Cost: ¥2,130,000)
|
|---|
| Outline of Final Research Achievements |
Magnesium Vapor Transport method (MVT method) has been developed, in which magnesium vapor is treated with boron to obtain MgB2 superconducting polycrystalline bulks. The obtained disk-shaped MgB2 bulk had high packing factor and high purity. The critical current density Jc is about twice as high as a sample produced by the conventional in situ technique, due to the reduction of voids and impurities. Trapped field of 1 T was measured at 10 K. Our results show that MVT method is one of the most effective techniques to extract superior trapped field performance of polycrystalline bulk MgB2 magnets through enhancing circulating supercurrent density and bulk size both of which are essential for high field trapped field magnets.
|
