Thermal diffusivity measurements using dual probe Scanning Thermal Microscopy

IF 5 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Thermal Sciences Pub Date : 2025-09-16 DOI:10.1016/j.ijthermalsci.2025.110293

Jan Martinek , Václav Hortvík , Miroslav Valtr , Petr Klapetek

引用次数: 0

Abstract

We present a novel dual probe Scanning Thermal Microscopy setup and methodology for addressing measurements of thermal diffusivity using two microscale thermal probes placed at mutual distance between 1 to

60 μ m

, monitoring propagation of heat pulses from one probe to another one through the studied sample. It is shown that even if the measured heat pulses are very weak in this configuration, they can be measured if the heat transfer via air is reduced by measuring in vacuum, radiative heat transfer is reduced by suitable measurement protocol and many pulses are averaged. Resulting signals show the expected dependencies and thermal diffusivity can be evaluated from them with a help of a numerical modeling. Diffusivity measurements are demonstrated on glasses and polymer samples and potential uncertainty sources are identified.

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热扩散率测量使用双探针扫描热显微镜

我们提出了一种新的双探针扫描热显微镜装置和方法，用于解决热扩散率的测量，使用两个微尺度热探针放置在相互距离为1到60μm之间，监测热脉冲在研究样品中从一个探针到另一个探针的传播。结果表明，即使在这种结构中测量到的热脉冲很弱，如果在真空中测量可以减少空气传热，通过适当的测量方案可以减少辐射传热，并且对许多脉冲进行平均，则可以测量到热脉冲。得到的信号显示了期望的依赖关系，热扩散系数可以在数值模拟的帮助下由它们来评估。在玻璃和聚合物样品上演示了扩散系数测量，并确定了潜在的不确定度源。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.