Noncontact modulated laser calorimetry in a dc magnetic field for stable and supercooled liquid silicon
Noncontact modulated laser calorimetry in a dc magnetic field for stable and supercooled liquid silicon
复制标题
直流磁场中的非接触调制激光量热法用于稳定和过冷的液态硅
DOI：
10.1088/0957-0233/21/2/025901
复制
发表时间：
2010
影响因子：
2.4
通讯作者：
S. Awaji
中科院分区：
文献类型：
--
作者：
H. Kobatake;H. Fukuyama;T. Tsukada;S. Awaji
液态硅的热导率是数值模拟过程的必要条件。它也具有科学意义。然而，由于液体中的对流和接触材料的污染，测量导热系数是一项困难的任务。为了克服这些实验困难，我们在直流磁场中开发了非接触式调制激光量热仪来测量高温液态金属的热容量、导热系数和发射率。在本研究中，通过对温度测量的改进，我们大大降低了测量的实验不确定度。测定了过冷硅液的导热系数和热容。液态硅的导热系数与熔点附近根据Wiedemann-Franz定律计算的值一致。这一结果表明，自由电子在液态硅的热输运过程中起主导作用。
Thermal conductivity of liquid silicon is necessary for numerical process modeling. It is also of scientific interest. However, measuring thermal conductivity is a difficult task because of convections in the liquid and contamination from contact materials. To overcome these experimental difficulties, we have developed noncontact modulated laser calorimetry in a dc magnetic field to measure heat capacity, thermal conductivity and emissivity of high-temperature liquid metals. In this study, through improvement in temperature measurements, we considerably reduced the experimental uncertainty of measurements. Furthermore, the thermal conductivity and heat capacity of supercooled liquid silicon were measured. Thermal conductivity of liquid silicon agrees with the values calculated assuming the Wiedemann–Franz law near the melting point. This result suggests that free electrons play a dominant role in the thermal transport process in liquid silicon.
DOI：
10.1016/j.ijheatmasstransfer.2006.12.026
发表时间：
2007-07
影响因子：
5.2
作者：
T. Tsukada;H. Fukuyama;H. Kobatake
通讯作者：
T. Tsukada;H. Fukuyama;H. Kobatake
影响因子：
2.4
作者：
Fukuyama, Hiroyuki;Kobatake, Hidekazu;Awaji, Satoshi
通讯作者：
Awaji, Satoshi
静磁场中过冷液态硅的非接触调制激光量热法
DOI：
--
发表时间：
2007
期刊：
影响因子：
--
作者：
H. Kobatake;et. al.
通讯作者：
et. al.