Three‐dimensional photothermal radiometry for the determination of the thermal diffusivity of solids
Three‐dimensional photothermal radiometry for the determination of the thermal diffusivity of solids
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DOI：
10.1063/1.1146443
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发表时间：
1995-06
影响因子：
1.6
通讯作者：
L. Fabbri;P. Fenici
中科院分区：
文献类型：
--
作者：
L. Fabbri;P. Fenici
本文介绍了一种测量固体热扩散率的辐射测量方法。该方法基于对局部和周期性光激励的应用引起的交流温度三维分布的动态检测。具体而言，沿样品表面沿着检测交流温度的信号相位分布。该程序给出了关于材料热扩散长度的直接信息，因此也给出了关于其热扩散率的直接信息。对不同散装材料的测量（即，Poco Graphite AXM-5 Q、Armco Iron、Al 2 O3和ZrO 2），并与通过激光闪光法在同一组样品上获得的数据进行比较。对一个非常薄的硅样品（292 μm）的进一步研究表明，在样品背面的热波反射对测量的热扩散率的影响。使用该技术获得的所有数据与使用激光闪光法获得的数据以及从文献中获得的类似数据的值在5%以内。
A radiometric method for measuring the thermal diffusivity of solids is presented. This method is based on the dynamic detection of an ac‐temperature three‐dimensional‐distribution induced by the application of a localized and periodic optical excitation. Specifically the signal phase profile of the ac‐temperature was detected along the sample surface. This procedure gives direct information on the material thermal diffusion length and, therefore, on its thermal diffusivity. Measurements on different bulk materials (i.e., Poco Graphite AXM‐5Q, Armco Iron, Al2O3, and ZrO2) were performed and compared to the data obtained by the laser‐flash method on the same set of samples. A further investigation on a very thin Si specimen (292 μm) showed the effect of thermal wave reflections at the sample backsurface on the measured thermal diffusivity. All the data obtained with this technique agreed to within 5% with those obtained using the laser‐flash method and with the values taken from the literature for similar ...