| Project/Area Number |
16360371
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Metal making engineering
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| Research Institution | Tohoku University |
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Principal Investigator |
FUKUYAMA Hiroyuki Tohoku University, Institute of Multidisciplinary Research for Advanced Materials, Associate Professor, 多元物質科学研究所, 助教授 (40252259)
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| Project Period (FY) |
2004 – 2006
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| Project Status |
Completed (Fiscal Year 2006)
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| Budget Amount *help |
¥13,500,000 (Direct Cost: ¥13,500,000)
Fiscal Year 2006: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 2005: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 2004: ¥10,300,000 (Direct Cost: ¥10,300,000)
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| Keywords | electromagnetic levitator / thermophysical property / silicon / modulated laser calorimetry / spectral emissivity / heat capacity / thermal conductivity / hemispherical total emissivity / 交流カロリメトリー / ステンレス鋼 |
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| Research Abstract |
Thermal transport properties of high temperature liquid silicon such as isobaric molar heat capacity, hemispherical total emissivity and thermal conductivity, are key parameter for improving the numerical modeling to produce high quality of single crystalline silicon by Czochralski method. However, it is difficult to measure the thermal transport properties of high-temperature liquid silicon due to the existing of both contamination from contact material and convections. To overcome these problems, a noncontact modulated laser calorimetry in a static magnetic field was developed for simultaneous measurement of the isobaric molar heat capacity, the hemispherical total emissivity and the thermal conductivity of liquid silicon. The isobaric molar heat capacity and the hemispherical total emissivity of liquid silicon were measured at temperature between 1750 K and 2050 K in a static magnetic field from 0.5 to 4 T. The convections in the electromagnetically levitated liquid silicon droplet were effectively suppressed by imposing a static magnetic field. The thermal conductivity was measured at temperatures between 1750 K and 2050 K by imposing the static magnetic field at 2 T or larger with suppressed convections. The determined thermal conductivity shows that the electron contribution is dominant for thermal transport in liquid silicon at temperatures of 1750-2050 K.
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