| Project/Area Number |
24360314
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Metal making engineering
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| Research Institution | Muroran Institute of Technology |
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Principal Investigator |
HIRAI Shinji 室蘭工業大学, 工学(系)研究科(研究院), 教授 (10208796)
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| Co-Investigator(Kenkyū-buntansha) |
KUZUYA Toshihiro 室蘭工業大学, 大学院工学研究科, 助教 (00424945)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2014: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2013: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Fiscal Year 2012: ¥7,800,000 (Direct Cost: ¥6,000,000、Indirect Cost: ¥1,800,000)
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| Keywords | 資源供給安定性 / 低環境負荷 / 熱電材料 / 硫化物 / CZTS / 二次焼結 / 不定比組成 / 固相反応焼結 / 2次焼結 / 熱電特性 / 無次元性能指数 / 光学顕微鏡組織 / 無孔化 / スタナイト化合物 / シェブレル化合物 / スタナイト型多元系硫化物 / 非化学量論組成 / 焼結体 |
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| Outline of Final Research Achievements |
We attempted to prepare stoichiometric sintered CZTS by using Cu2S, ZnS, and SnS2 as starting materials in a solid-phase reaction under a pressure of 20-80 MPa for 3.6 ks using a pulsed electric current sintering at 973 K. In addition, a second sintered compact was prepared by the following process: a compact previously sintered was crushed, and then, it was resintered under 50-80 MPa at 1073 K. Micropores were revealed by observation of the cross-sectional structure of the primary sintered compacts formed under a high pressure. In the secondary sintered compact, pores were not observed, indicating that a homogeneous compact was obtained. The resultant secondary sintered compact with Cu2.3Zn0.7SnS3.85 exhibits a dimensionless thermoelectric figure of merit (ZT) of 0.18 at 561 K. This value may increase as a high temperature and is greater than the previously reported values for Cu2.1Zn0.9SnS4 and Cu2ZnSnS4, respectively.
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