| Project/Area Number |
15K06447
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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 | Toyota Physical and Chemical Research Institute |
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Principal Investigator |
Nogami Masayuki 公益財団法人豊田理化学研究所, フェロー事業部門, フェロー (90198573)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Keywords | ガラス / 希土類イオン / 遷移金属イオン / 価数制御 / 光特性 / ガス拡散 / 光機能 / 希土類 / 水素 / 発光材料 / 光機能性材料 |
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| Outline of Final Research Achievements |
Controlling valence state of metal ions that are doped in glasses has been widely applied for turning optical properties. Here the reactions of hydrogen with Eu3+ and Cu2+ ions-doped Na2O-Al2O3-SiO2 glass was investigated and found that a completely different reduction was occurring than results reported so far, which was primarily determined by the Al3+/Na+ ratio in glass compositions. For the glass with Al3+/Na+ < 1, the Eu3+ ions occupied the interstitial positions in the glass structure and were not reduced even under heating in H2 gas and the Cu2+ ions were reduced via hydrogen to metallic Cu, distributing in glass body. For the glass with Al3+/Na+ > 1, on the other hand, the Eu3+ ions were reduced to the Eu2+, and the reduced Cu metal moved outwards and formed a metallic film on glass surface. In these reducing reactions of the doped-metal ions, the Al3+ ions play important role to form the OH bonds, where the doped metal ions are reduced.
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