Development of modulated laser calorimetry using a solid platinum sphere as a reference
Development of modulated laser calorimetry using a solid platinum sphere as a reference
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DOI：
10.1088/0957-0233/18/7/036
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发表时间：
2007-07-01
影响因子：
2.4
通讯作者：
Awaji, Satoshi
中科院分区：
文献类型：
--
作者：
Fukuyama, Hiroyuki;Kobatake, Hidekazu;Awaji, Satoshi
本研究是一项基础性研究，旨在发展一种新的非接触式调制式激光测热方法，该方法结合静磁场来测量金属熔体的真实导热系数。为了建立实验原理，在本研究中使用了实心铂球。用激光对位于射频线圈中心的球体进行正弦加热，监测其温度响应。通过分析激光输入与温度响应之间的温度幅值和位相差，得到了铂在1400-1700K温度范围内的热容、导热系数和半球总发射率，在实验不确定度范围内与参考数据吻合，验证了实验方法。
This study is a fundamental investigation aimed at developing a new noncontact modulated laser calorimetry method incorporating a static magnetic field to achieve measurement of the true thermal conductivity of a metallic melt. For establishing the experimental principle, a solid platinum sphere was used in this study. The sphere positioned in the centre of a radio frequency coil was heated sinusoidally by a laser; its temperature response was monitored. Analyses of the temperature amplitude and phase difference between the laser input and temperature response yielded the heat capacity, thermal conductivity and hemispherical total emissivity of platinum for temperatures of 1400 - 1700 K. The obtained data agree with the reference data within experimental uncertainty, which verifies the experimental method.