| 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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| 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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