| Budget Amount *help |
¥15,340,000 (Direct Cost: ¥11,800,000、Indirect Cost: ¥3,540,000)
Fiscal Year 2012: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2011: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2010: ¥9,100,000 (Direct Cost: ¥7,000,000、Indirect Cost: ¥2,100,000)
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| Research Abstract |
By unidirectional solidification of Cu-Si and Sn-Si alloys, optimized cooling condition for producing a bulk Si crystal as well as the refining effect was investigated. Bulk Si was obtained by controlling the temperature gradient and cooling rate for both solvents and the solidification rates were found to be controlled by the diffusion of Si in the solvents. Refining effects were no so significant as that of Al-Si solvent which was clarified and our former research. From the thermodynamic measurement of Sn-Si-B system, instability of B in the melts was clarified and more effective removal of B using CaO-CaF2-SiO2 slag was verified.
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