Synthesis of diamond under amibient pressure using high temperature molten salt electrolysis
| Project/Area Number |
15K13807
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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 industrial materials
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| Research Institution | Kyoto University |
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Principal Investigator |
Toshiyuki Nohira 京都大学, エネルギー理工学研究所, 教授 (00303876)
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| Project Period (FY) |
2015-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | ダイヤモンド / 電解合成 / 常圧 / 溶融塩 |
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| Outline of Final Research Achievements |
This study was performed to synthesize diamond by electrolysis in a high temperature molten salt under ambient pressure. Molten LiCl-KCl containing K2CO3 (0.2 mol%) and various amout of KOH (0, 2.0, 8.0, 14.0 mol%) was used as an electrolysis bath at 923 K. Samples were prepared by potentiostatic electrolysis at 1.1 V (vs. Li+/Li) using a nickel plate as a substrate. Quantity of electricity was a constant value of 50 C cm-2 for each sample. By micro-Raman spectroscopy, a strong and sharp peak at 1332 cm-1, which is characteristic of diamond, was observed for the sample prepared in the 2.0 mol%-KOH system. Moreover, when the quantity of electricity was reduced to 20 C cm-2, the sharp peaks at 1332 cm-1 were detected at many parts of the substrate. In conclusion, this study confirmed the synthesis of diamond in the liquid phase of molten salt under ambient pressure.
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Report
(4 results)
Research Products
(7 results)
