2013 Fiscal Year Final Research Report
High-pressure (GPa) impedance measurements based on an indentation-induced local stress field and development of a new glass electrolyte
| Project/Area Number |
23686095
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | Nagoya Institute of Technology (2013)
University of Hyogo (2011-2012) |
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Principal Investigator |
DAIKO Yusuke 名古屋工業大学, 工学(系)研究科(研究院), 助教 (70514404)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | 圧子圧入法 / 高圧インピーダンス / アンビルセル / 活性化体積 / 燃料電池 / ガラス |
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| Research Abstract |
Electrical measurements of conducting and dielectric materials under high pressures (in the order of GPa) reveal important information regarding orbital overlaps, electronic states, changes in transition temperatures, and activation volumes. In this study, we demonstrate a new method for high-pressure impedance measurements, up to ~4 GPa, utilizing an indentation-induced local stress field. The current system does not require any pressure mediums or pressure calibrations. The deltaV for O2- ion conduction in 10 mol% Y2O3-doped zirconia at 500oC was estimated to be 3.0 cm3 mol-1. deltaV increased with increasing temperatures from 500 to 600oC. The technique also allows the concurrent determination of the effective elastic modulus by fitting the experimental data obtained from the indentation load-depth profile curves with the Hertzian elastic model. The experimental values were consistent with the theoretical values.
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