Emissivity has been found to play a key role in heat transfer even at relatively low temperatures. Two general equations have been derived which allow one to estimate the emissivity of different materials for this system.doi:10.1016/0040-6031(72)87061-8D.J. David...
We experimentally investigated the infrared properties of a set of steel textiles, prepared using different type of fabrics. Infrared emission of the textiles was characterized in the mid-infrared range, i.e. 8÷14 μm, by observing their temperature evolution under heating regime with a focal pl...
Different materials have different infrared radiation characteristics due to differences in their chemical composition and physical structure, resulting in different emissivity. Usually, non-metallic materials such as plastics, wood and ceramics have higher IR emissivity, while metallic materials such as...
The uncoated C/SiC has higher emissivity than either of the coated C/SiC materials. The reason is unclear. It could be due to chemistry differences between the uncoated surface and the two coating. The fact that a different technique was used to measure the emissivity of the uncoated ...
The free-carrier dynamics in these materials result in nanosecond-scale modulation of thermal emissivity, leading to nanosecond pulsed thermal emission. To our knowledge, the nanosecond thermal-emissivity modulation demonstrated in this work is three orders of magnitude faster than what has been ...
Development of thermal insulating material with low emissivity and high‐temperature stabilityaluminatesoptical materials/propertiesporous materialsthermal barrier coatings (TBC)thermal conductivityIn a previous study, we demonstrated that porous magnesium aluminate spinels, MgAl2O4, with two different pore ...
It appears from these data that, based on natural variations in emissivity of different surface materials, AVHRR Band 5 is best used for temperature remote sensing of rocks, soils, and senescent vegetation, while Band 3 is best for green vegetation and water. Band 4 is preferred for thermal ...
the interest in composite materials with reduced emissivity is high. Different methods for the preparation of such composites have been described. Polyester-based polyurethane/TiO2composite films have been prepared via sol–gel process;204the same group reported on PU/TiO2films prepared by an ultrasoni...
It appears from these data that, based on natural variations in emissivity of different surface materials, AVHRR Band 5 is best used for temperature remote sensing of rocks, soils, and senescent vegetation, while Band 3 is best for green vegetation and water. Band 4 is preferred for thermal ...
Effects of absorber emissivity on thermal performance of a solar cavity receiver The emissivity of high reflective materials depends on ohmic losses of the surface layer of the reflector; such losses are related to the thickness, roughness and conductivity of this layer and on dielectric losses of ...