Qiu L, Zheng X H, Zhu J, Tang D W
Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing, People's Republic of China.
Rev Sci Instrum. 2011 Aug;82(8):086110. doi: 10.1063/1.3626937.
A non-destructive thermal effusivity characterization method described as a freestanding serpentine sensor-based 3ω technique was reported. This freestanding serpentine sensor was fabricated by the mature flexible printed circuit production technique. Expression for the temperature response of the freestanding serpentine sensor with respect to the thermal effusivity of the test sample was presented. The technique was further verified by measuring four kinds of standard samples at room temperature. Experimental results which well agree with reference values demonstrate the new technique is of great application value to thermal effusivity characterization of solids, liquids, and structures to which the conventional 3ω technique is not applicable, e.g., solids with porous surfaces.
报道了一种基于独立蛇形传感器的3ω技术的非破坏性热发射率表征方法。这种独立蛇形传感器是通过成熟的柔性印刷电路生产技术制造的。给出了独立蛇形传感器的温度响应相对于测试样品热发射率的表达式。通过在室温下测量四种标准样品对该技术进行了进一步验证。与参考值吻合良好的实验结果表明，该新技术对于传统3ω技术不适用的固体、液体和结构（如具有多孔表面的固体）的热发射率表征具有很大的应用价值。
