2015 Fiscal Year Final Research Report
Addition of conductivity to isotropic negative thermal expansion compounds with framework structure
| Project/Area Number |
25420703
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | University of Tsukuba |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | 負の熱膨張 / イオン伝導 / フレームワーク構造 / 酸化物 |
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| Outline of Final Research Achievements |
Negative thermal expansion (NTE) compounds show volumetric contraction with increasing temperature. It has been expected to apply the NTE compounds for a variety of applications. However, a function of the NTE compounds reported previously has been limited to just NTE property. In this investigation, a development of functional NTE compounds has been carried out. Zirconium tungstate, ZrW2O8, is one of the NTE compounds. In order to add conductivity to ZrW2O8, Zr1-xScxW2O8-y solid solutions were synthesized. It is successful that the solid stations have ionic conductivity of oxygen atom via defect generated by the doping of trivalent cations. The mechanism of the ionic conductivity is clarified.
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| Free Research Field |
材料化学
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