Characterization of Thermal Transport in One-dimensional Solid Materials
| Autor: | Xiaoduan Tang, Guoqing Liu, Kevin Bergler, Xinwei Wang, Huan Lin |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Hot Temperature
Materials science thermal diffusivity General Chemical Engineering 02 engineering and technology Thermal diffusivity volume-based specific heat 01 natural sciences General Biochemistry Genetics and Molecular Biology Thermal conductivity measurement Thermal conductivity 0103 physical sciences Radiative transfer Calibration Humans thermal conductivity Composite material Electrical conductor 010302 applied physics General Immunology and Microbiology Physics General Neuroscience 021001 nanoscience & nanotechnology Thermal conduction Characterization (materials science) thermal transport human head hair transient electro-thermal technique Issue 83 0210 nano-technology Hair |
| Zdroj: | Journal of Visualized Experiments : JoVE |
| ISSN: | 1940-087X |
| DOI: | 10.3791/51144-v |
| Popis: | The TET (transient electro-thermal) technique is an effective approach developed to measure the thermal diffusivity of solid materials, including conductive, semi-conductive or nonconductive one-dimensional structures. This technique broadens the measurement scope of materials (conductive and nonconductive) and improves the accuracy and stability. If the sample (especially biomaterials, such as human head hair, spider silk, and silkworm silk) is not conductive, it will be coated with a gold layer to make it electronically conductive. The effect of parasitic conduction and radiative losses on the thermal diffusivity can be subtracted during data processing. Then the real thermal conductivity can be calculated with the given value of volume-based specific heat (ρcp), which can be obtained from calibration, noncontact photo-thermal technique or measuring the density and specific heat separately. In this work, human head hair samples are used to show how to set up the experiment, process the experimental data, and subtract the effect of parasitic conduction and radiative losses. |
| Databáze: | OpenAIRE |
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