2012 Fiscal Year Final Research Report
Material design for hybrid functionality using covalently bonded macro-tetrahedral compounds composed of light elements
| Project/Area Number |
23656390
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Project Period (FY) |
2011 – 2012
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| Keywords | 高圧合成 / 共有結合 / 結晶化学 / 機能設計 / イオン伝導体 / 発光材料 |
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| Research Abstract |
New covalently bonded “macro-tetrahedral compounds" were synthesized under high-pressure condition and the atom insertion was attempted to promote functionality. Ternary thio-borates, CaB_2S_4 and Li_2B_2S_5, were successfully synthesized at 3-5 GPa and600-1000℃ and their crystal structures were analyzed. Photo-luminescence was observed in Eu-doped CaB_2S_4 when excited at 340-460 nm. Structural analysis of Li_2B_2S_5 strongly suggests that this phase is a candidate material for low-temperature Li-ion conductor.
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