Enhancement of thermoelectric properties of off-stoichiometric Heusler compounds and elucidation of its mechanism
| Project/Area Number |
26420664
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Physical properties of metals/Metal-base materials
|
|---|
| Research Institution | Nagoya Institute of Technology |
|---|
Principal Investigator |
NISHINO Yoichi 名古屋工業大学, 工学(系)研究科(研究院), 教授 (50198488)
|
|---|
| Co-Investigator(Renkei-kenkyūsha) |
MIYAZAKI Hidetoshi 名古屋工業大学, 大学院工学研究科, 准教授 (10548960)
|
|---|
| Project Period (FY) |
2014-04-01 – 2017-03-31
|
| Project Status |
Completed (Fiscal Year 2016)
|
| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
|
|---|
| Keywords | 熱電変換材料 / ホイスラー化合物 / 擬ギャップ / ゼーベック効果 / 価電子濃度 / 非化学量論組成 / 電子構造 / 熱伝導率 / 電気伝導 / 熱伝導 / 熱電発電 |
|---|
| Outline of Final Research Achievements |
Off-stoichiometric Fe2V1+x-yTayAl1-x alloys are of n-type for V-rich composition (x>0) but of p-type for Al-rich composition (x<0). The n-type alloy shows the power factor reaching 5.8×10-3 W/mK2, in parallel with the possession of the thermal conductivity as low as 5.6 W/mK, because of the synergistic effect of off-stoichiometry and Ta substitution. Thus the dimensionless figure of merit leads to ZT=0.29 at 400K. In addition, the p-type alloy shows the power factor of 3.3×10-3 W/mK2 and ZT=0.13 at 350K. On the other hand, the p-type alloys derived from n-type Fe2V1+xAl1-x with Ti doping show a comparable value of the above ZT even without Ta substitution.
|
Report
(4 results)
Research Products
(73 results)
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[Journal Article] Electronic and Local Crystal Structures of the ZrNiSn Half-Heusler Thermoelectric Material2014
Author(s)
H. Miyazaki, T. Nakano, M. Inukai, K. Soda, Y. Izumi, T. Muro, J. Kim, M. Takata, M. Matsunami, S. Kimura, Y. Nishino
-
Journal Title
MATERIALS TRANSACTIONS
Volume: 55
Issue: 8
Pages: 1209-1214
DOI
NAID
ISSN
1345-9678, 1347-5320
Related Report
Peer Reviewed / Open Access
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
