A high precision infrared emissivity measurement method for micro/nano structures

IF 5 2区工程技术 Q1 ENGINEERING, MECHANICAL International Journal of Thermal Sciences Pub Date : 2025-05-01 Epub Date: 2025-01-24 DOI:10.1016/j.ijthermalsci.2025.109740

Yinxue Bai , Gangquan Wang , Yue Liu , Longfei Li , Kaihua Zhang , Baolin Zhao , Yufang Liu , Kun Yu

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Abstract

The potential of micro/nano structures in regulating thermal radiation for infrared stealth, radiation cooling, and energy harvesting has attracted significant research interest. However, the radiation from optical components and the surrounding environment poses a challenge to the accurate measurement of thermal radiation of micro/nano samples in laboratory environments. In this study, a background-separated spectral emissivity measurement method was designed, employing two standard reference samples to isolate the sample background and optical component background from the measurement signal of the Fourier Transform Infrared (FTIR) spectrometer. Accurate measurement of infrared spectral emissivity was achieved by analyzing the temperature variations of the sample and optical component backgrounds. To validate this method, a Pt/Cr/Si emitter was designed and fabricated. The measured spectral emissivity of the micro/nano sample was consistent with the simulation results, demonstrating the effectiveness of the background-separated emissivity measurement method. This study provides an effective approach for measuring the spectral emissivity of micro/nano samples above room temperature and separating the thermal radiation background during the measurement process.

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一种高精度微纳结构红外发射率测量方法

微纳结构在红外隐身、辐射冷却和能量收集等热辐射调节方面的潜力引起了人们的广泛关注。然而，光学元件和周围环境的辐射对实验室环境中微纳样品热辐射的精确测量提出了挑战。本研究设计了一种背景分离的光谱发射率测量方法，利用两个标准参比样品从傅里叶变换红外（FTIR）光谱仪测量信号中分离出样品背景和光学成分背景。通过分析样品的温度变化和光学元件背景，实现了红外光谱发射率的精确测量。为了验证该方法，设计并制作了一个Pt/Cr/Si发射极。微纳样品的实测光谱发射率与仿真结果一致，验证了背景分离发射率测量方法的有效性。本研究为测量室温以上微纳样品的光谱发射率和分离测量过程中的热辐射背景提供了有效的方法。

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来源期刊

International Journal of Thermal Sciences 工程技术-工程：机械

CiteScore

8.10

自引率

11.10%

发文量

531

审稿时长

55 days

期刊介绍： The International Journal of Thermal Sciences is a journal devoted to the publication of fundamental studies on the physics of transfer processes in general, with an emphasis on thermal aspects and also applied research on various processes, energy systems and the environment. Articles are published in English and French, and are subject to peer review. The fundamental subjects considered within the scope of the journal are: * Heat and relevant mass transfer at all scales (nano, micro and macro) and in all types of material (heterogeneous, composites, biological,...) and fluid flow * Forced, natural or mixed convection in reactive or non-reactive media * Single or multi–phase fluid flow with or without phase change * Near–and far–field radiative heat transfer * Combined modes of heat transfer in complex systems (for example, plasmas, biological, geological,...) * Multiscale modelling The applied research topics include: * Heat exchangers, heat pipes, cooling processes * Transport phenomena taking place in industrial processes (chemical, food and agricultural, metallurgical, space and aeronautical, automobile industries) * Nano–and micro–technology for energy, space, biosystems and devices * Heat transport analysis in advanced systems * Impact of energy–related processes on environment, and emerging energy systems The study of thermophysical properties of materials and fluids, thermal measurement techniques, inverse methods, and the developments of experimental methods are within the scope of the International Journal of Thermal Sciences which also covers the modelling, and numerical methods applied to thermal transfer.