| Project/Area Number |
24656368
|
|---|
| Research Category |
Grant-in-Aid for Challenging Exploratory Research
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
Physical properties of metals
|
|---|
| Research Institution | The University of Tokyo |
|---|
Principal Investigator |
YAMAMOTO Akiyasu 東京大学, 工学(系)研究科(研究院), 助教 (20581995)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
SHIMOYAMA Junichi 東京大学, 大学院工学系研究科, 准教授 (20251366)
|
|---|
| Co-Investigator(Renkei-kenkyūsha) |
KISHIO Kohji 東京大学, 大学院工学系研究科, 教授 (50143392)
|
|---|
| Project Period (FY) |
2012-04-01 – 2014-03-31
|
| Project Status |
Completed (Fiscal Year 2013)
|
| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2013: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
|
|---|
| Keywords | 超伝導材料 / 超伝導 |
|---|
| Outline of Final Research Achievements |
MgB2 has the highest critical temperature Tc (~40 K) among conventional metallic superconductors and is expected to be applied at 5-30 K using a compact cryocooler, which enables cooling without liquid helium. In this study, pressureless densification of superconducting core in MgB2 wires was investigated. (1) Modified in-situ process using MgB4 as precursor was developed. The packing factor of MgB2 was improved 30% compared to the conventional in-situ process owing to the reduction of Mg amount in starting powder mixture. (2) Promotion of self-sintering of MgB2 under ambient pressure was succeeded. Record high connectivity was achieved owing to dense and well-connected grain-boundaries.
|
