Novel Heat Dissipation Materials Improve the Heat Dissipation Rate of Thermal Coatings

Recent thermal management research reveals that spherical carbon material, a novel heat dissipation material, achieves a thermal conductivity of 174 W/(m·K) and a thermal emissivity of 0.95. When nano-carbon spheres are adopted as the base material to prepare nano-carbon sphere heat-dissipating coatings, the thermal conductivity of the resulting coatings is largely governed by the thermal performance and mass fraction of the base material.

Laboratory research conducted by Zhisheng Weihua on ZS heat-dissipating coatings indicates that the ultra-fine and nano-sized components of ZS coatings feature a micro loose structure. Such structure can effectively reduce the refractive index of substrates and increase the heat dissipation depth, thereby significantly improving the surface emissivity of treated objects. In addition, the morphology and particle size of fillers exert a crucial influence on coating emissivity. Within a certain range, higher flakiness and better spreadability of filler particles lead to lower emissivity. In contrast, ZS coating fillers with smaller particle sizes and larger specific surface areas generally deliver higher emissivity when presented in spherical or other regular shapes.

Although nano-carbon sphere coatings have been exhibited at industrial expos, authoritative test data remains unavailable, and domestic and overseas literature concerning the thermal dissipation properties of such coatings is quite scarce. In this paper, ZS-411 nano heat radiation cooling coating is tested to characterize its micromorphology and heat dissipation mechanism. A comparative experiment is carried out on an LED radiator coated with nano-carbon sphere coating, providing technical references for the application of nano-carbon sphere coatings on radiators.

Developed by researchers from Beijing Zhisheng Weihua Coatings Group, ZS-411 heat dissipation and cooling coating is an energy-saving coating designed to boost thermal dissipation efficiency. As an emerging advanced material, nano-carbon spheres combine ultra-fine granularity with a spherical structure, which endows the material with relatively high thermal emissivity.