Copper, aluminum, steel, and titanium plates with dimensions of 100 mm × 100 mm and a thickness of 1 mm were coated with blackbody paint and subjected to localized infrared heating using a halogen point heater.
The temperature distribution during heating was observed using a thermal imaging camera and measured with an emissivity setting of 0.94. The blackbody coating was applied to equalize the surface emissivity and reduce measurement errors caused by reflections from the metal surface.
The way heat spreads varies significantly depending on the thermal conductivity of the material. In this video, infrared heating is applied under identical conditions to copper, aluminum, steel, and titanium plates, and the temporal changes in temperature distribution are compared to visualize the influence of thermal conductivity on heat diffusion behavior.
The thermographic images reveal differences between materials that rapidly spread heat and those that tend to concentrate heat near the heated area. Infrared heating is widely used for localized heating, joining, heat treatment, and temperature distribution evaluation.
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