Experimental study on superionic ice at high pressures and temperatures
Project/Area Number |
22540489
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Petrology/Mineralogy/Science of ore deposit
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Research Institution | The University of Tokyo |
Principal Investigator |
OKADA Taku 東京大学, 物性研究所, 助教 (90343938)
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Project Period (FY) |
2010 – 2012
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Project Status |
Completed (Fiscal Year 2012)
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Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2012: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2010: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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Keywords | 氷惑星 / 水素 / プロトン / 氷 / 超イオン伝導 / 高圧 / 高温 / 電気抵抗 / 地球・惑星内部構造 / 水 / 低温 |
Research Abstract |
Experimental techniques to make in-situ AC impedance measurements at high pressures and temperatures was developed using diamond anvil cells and CO2 laser heating. AC impedance of high-pressure H2O ices was measured up to 50 GPa and 2000 K. The impedance decreased gradually with increasing temperature and some discontinuous changes were observed at around 40 GPa. The change might correspond to the transformation into a superionic phase. On the other hand, during increasing pressure at room temperature, the impedance decreased with increasing pressure and took a local minimum at around 10 GPa. Then, it increased with pressure. From view point of molecular dynamics simulation, the trough of the impedance can be interpreted from collaboration of proton conduction of ionic defects and rotation defects in ices.
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Report
(4 results)
Research Products
(41 results)
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[Journal Article] Crystal Structure of a New Carbon-Nitride-Related Material C2N2 (CH2)2011
Author(s)
Sougawa, M., Sumiya, T., Takarabe, K., Mori, Y., Okada, T., Gotou, H., Yagi, T., Yamazaki, D., Tomioka, N., Katsura, T., Kariyazaki, H., Sueoka, K., Kunitsugu, S.
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Journal Title
Japanese Journal of Applied Physics
Volume: 50
Issue: 9R
Pages: 95503-95503
DOI
NAID
Related Report
Peer Reviewed
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[Presentation] 新規窒化炭素化合物の合成、結晶構造、圧力効果とCN単結合の強さ2011
Author(s)
寒川匡哉, 森嘉久, 財部健一, 岡田卓, 後藤弘匡, 八木健彦, 山崎大輔, 富岡尚敬, 桂智男, 仮屋崎弘昭, 末岡浩治
Organizer
第52回高圧討論会
Place of Presentation
那覇市・沖縄キリスト教学院
Year and Date
2011-11-10
Related Report
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