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首页> 外文期刊>Journal of Heat Transfer >Infrared Microscopy Enhanced Angstrom's Method for Thermal Diffusivity of Polymer Monofilaments and Films
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Infrared Microscopy Enhanced Angstrom's Method for Thermal Diffusivity of Polymer Monofilaments and Films

机译：红外显微镜增强盎格格朗聚合物单丝和薄膜的热扩散率的方法

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摘要

angstrom ngstrom's method has been used to quantify thermal diffusivity of materials for over 150 years via measurement of thermal waves propagating through a long, thin sample. However, the traditional angstrom ngstrom's method has some limitations. First, the traditional method is insensitive to potential variability in thermal diffusivity along the length of a sample because only two sensors are used. Second, conventional contact-based sensing techniques such as thermocouples limit the method to samples that are sufficiently large so as to be unaffected by heat loss through the sensors. Here, we develop and validate the infrared microscopy enhanced angstrom ngstrom's method that overcomes these limitations and enables measurement of microscale samples. This work demonstrates the accuracy and applicability of the technique through measurement of several commercially available polymer monofilaments and films and comparison of the data to published values. This method is particularly robust to uncertainty in emissivity making it attractive for characterization of semitransparent samples.
机译：通过测量通过长薄的样品传播的热波来定量材料的热扩散性超过150年的材料，用于量化材料的热扩散率。然而，传统的忠实的NGStrom方法有一些局限性。首先，传统方法对沿着样品的长度的热扩散率的潜在变异不敏感，因为仅使用两个传感器。其次，诸如热电偶的传统基于接触的感测技术限制了足够大的样品的方法，以便不受传感器的热损失的影响。在这里，我们开发并验证红外显微镜增强忠诚的NGStrom的方法，克服了这些限制并实现了微观样本的测量。这项工作通过测量几种商业上可获得的聚合物单丝和薄膜以及数据与公开值的比较来表现出技术的准确性和适用性。该方法对发射率的不确定性特别稳健，使其具有对半透明样品的表征的吸引力。

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  • 来源
    《Journal of Heat Transfer》 |2019年第8期|081601.1-081601.11|共11页
  • 作者

    Hahn Jaesik; Reid Tahira; Marconnet Amy;

  • 作者单位

    Purdue Univ Sch Mech Engn W Lafayette IN 47907 USA;

    Purdue Univ Sch Mech Engn W Lafayette IN 47907 USA;

    Purdue Univ Sch Mech Engn W Lafayette IN 47907 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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