| Project/Area Number |
24560830
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Inorganic materials/Physical properties
|
|---|
| Research Institution | Tokyo Polytechnic University |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2012-04-01 – 2016-03-31
|
| Project Status |
Completed (Fiscal Year 2015)
|
| Budget Amount *help |
¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2012: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
|
|---|
| Keywords | 黒鉛層間化合物 / 炭素材料 / 超伝導 / 導電性材料 / CaC6 / 電気伝導率 / 大気安定性 / ホール係数 / 磁気抵抗 / 超伝導性 / ゼーベック係数 / MgC6 / KC8 |
|---|
| Outline of Final Research Achievements |
Calcium-graphite intercalation compound (Ca-GIC) has attracted attention because they transition into a superconducting state at higher temperature than other GICs. In this work, Ca-GIC is characterized and compared with conventional GICs such as K-GIC. The metallic character of Ca-GIC was enhanced and its Seebeck coefficient was small. Due to the degradation of its graphitic structure, the Ca-GIC had lower thermal conductivities than other GICs. Furthermore, when lithium from the synthesis of the Ca-GIC remained in the structure, its transition temperature decreased.
Magnesium-GIC (Mg-GIC) has not yet been synthesized, but it is expected to have a higher transition temperature than Ca-GIC. We attempted to synthesize Mg-GIC in this work. Based on the Seebeck coefficients of some of the products of reactions between Mg and graphite, Mg-GIC might have formed in a small area of the graphite. However, we could not confirm the change in structure expected from the formation of Mg-GIC.
|
