| Budget Amount *help |
¥18,720,000 (Direct Cost: ¥14,400,000、Indirect Cost: ¥4,320,000)
Fiscal Year 2013: ¥9,100,000 (Direct Cost: ¥7,000,000、Indirect Cost: ¥2,100,000)
Fiscal Year 2012: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2011: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
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| Outline of Final Research Achievements |
Silicon was electrochemically reduced in a molten oxide mixture including SiO2. Formation of a solid solution and silicide layer was observed on iron and nickel cathodes. The relationship between electrolytic conditions and the activities of silicon in the products was considered, and the electrochemical reaction was discussed based on thermodynamics and kinetics.
Because boron is an impurity element which is difficult to remove in refining of silicon, evaporations of boron oxide and its suboxide were also studied. Formation of gas species such as B2O3(g) and B2O2(g) were evaluated by a Knudsen cell mass spectrometer to discuss evaporation of boron depending on the oxygen potential.
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