Spectral emissivity measurements of liquid refractory metals by spectrometers combined with an electrostatic levitator
Spectral emissivity measurements of liquid refractory metals by spectrometers combined with an electrostatic levitator
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DOI：
10.1088/0957-0233/23/12/125602
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发表时间：
2012-12
影响因子：
2.4
通讯作者：
T. Ishikawa;Yusuke Ito;J. Okada;P. Paradis;Y. Watanabe;T. Masaki
中科院分区：
文献类型：
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作者：
T. Ishikawa;Yusuke Ito;J. Okada;P. Paradis;Y. Watanabe;T. Masaki
研制了一种结合静电悬浮器的高温熔体光谱发射率测量系统。高温样品的辐射强度是用多通道光谱仪（MCPD）在700-1000 nm光谱范围内测量的，而傅里叶变换红外光谱仪（FTIR）在1.1-6 µm间隔内测量辐射。用黑体辐射炉对这些光谱仪进行了标定，并计算了光谱半球发射率。该系统的能力进行了评估与熔融锆样品。在1850-2210 K温度范围内，熔融锆的光谱半球发射率表现出负的波长依赖性和几乎恒定的变化。通过对光谱半球发射率进行积分，计算出锆的半球总发射率约为0.32，与文献值吻合较好。熔融锆在熔化温度下的恒压热容计算为40.9 J mol−1 K−1。
A spectral emissivity measurement system combined with an electrostatic levitator was developed for high-temperature melts. The radiation intensity from a high-temperature sample was measured with a multichannel photospectrometer (MCPD) over the 700–1000 nm spectral range, while a Fourier transform infrared spectrometer (FTIR) measured the radiation over the 1.1–6 µm interval. These spectrometers were calibrated with a blackbody radiation furnace, and the spectral hemispherical emissivity was calculated. The system's capability was evaluated with molten zirconium samples. The spectral hemispherical emissivity of molten zirconium showed a negative wavelength dependence and an almost constant variation over the 1850–2210 K temperature range. The total hemispherical emissivity of zirconium calculated by integrating the spectral hemispherical emissivity was found to be around 0.32, which showed good agreement with the literature values. The constant pressure heat capacity of molten zirconium at melting temperature was calculated to be 40.9 J mol−1 K−1.