2011 Fiscal Year Final Research Report
Development of New Clathrate and Related Compounds
| Project Area | New Materials Science Using Regulated Nano Spaces －Strategy in Ubiquitous Elements |
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| Project/Area Number |
19051011
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| Research Category |
Grant-in-Aid for Scientific Research on Priority Areas
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| Allocation Type | Single-year Grants |
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| Review Section |
Science and Engineering
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| Research Institution | Hiroshima University |
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Principal Investigator |
YAMANAKA Shoji 広島大学, 工学研究院, 特任教授 (90081314)
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| Co-Investigator(Renkei-kenkyūsha) |
TAKABAKAKE Toshiro 広島大学, 大学院・先端物質科学研究科, 教授 (40171540)
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| Project Period (FY) |
2007 – 2011
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| Keywords | クラスレート / 超伝導 / 熱電変換 / ユビキタス元素 / 超高圧合成 / 格子振動 / 熱伝導 / 単結晶育成 |
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| Research Abstract |
New silicon clathrates and related compounds have been developed using high pressure and high temperature (HPHT) conditions. Single crystals of type II silicon clathrate NaxSi136 were obtained, and the structure was successfully determined. New high pressure phases have been developed in binary La-Si and ternary Ca-Al-Si and Mg-Al-Si systems; the structures and superconductivity have been studied. 3D fullerene C_<60> polymers analogous to Si clathrate compounds have been prepared using HPHT conditions. Semiconducting clathrate compounds, in particular type-I Ba_8Ga_<16>Sn_<30> and type-VIII Ba_8Ga_<16>Sn_<30> were prepared, and their high thermoelectric performance was studied in detail.
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