| Budget Amount *help |
¥47,190,000 (Direct Cost: ¥36,300,000、Indirect Cost: ¥10,890,000)
Fiscal Year 2015: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2014: ¥9,100,000 (Direct Cost: ¥7,000,000、Indirect Cost: ¥2,100,000)
Fiscal Year 2013: ¥9,100,000 (Direct Cost: ¥7,000,000、Indirect Cost: ¥2,100,000)
Fiscal Year 2012: ¥9,100,000 (Direct Cost: ¥7,000,000、Indirect Cost: ¥2,100,000)
Fiscal Year 2011: ¥16,250,000 (Direct Cost: ¥12,500,000、Indirect Cost: ¥3,750,000)
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| Outline of Final Research Achievements |
We developed the new production process of silicon with low concentrations of boron and phosphorous by the electrochemical reduction of silica in molten CaCl2 at 1123 K. The lowest impurity level of the obtained silicon was confirmed to be B < 0.5 ppm and P < 0.4 ppm by ICP-MS and GD-MS. Aiming at the development of a continuous production method, we investigated the electrochemical reduction of silica on a liquid zinc cathode in molten CaCl2 at 1123 K. By SEM/EDX analysis, silica powder was confirmed to be reduced to silicon. Moreover, we succeeded in the recovery of silicon from the liquid Zn-Si alloy.
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