Design and calculation of low infrared transmittance and low emissivity coatings for heat radiative applications

Guang-hai Wang1), Yue Zhang1), Da-hai Zhang2), and Jin-peng Fan2) 1) School of Materials Science and Engineering, Beihang University, Beijing 100191, China 2) National Defence Science & Technology Key Laboratory of Advanced Functional Composites, Aerospace Research Institute of Materials and Processing Technology, Beijing 100076, China

摘 要：The infrared transmittance and emissivity of heat-insulating coatings pigmented with various structural particles were studied using Kubelka-Munk theory and Mie theory. The primary design purpose was to obtain the low transmittance and low emissivity coatings to reduce the heat transfer by thermal radiation for high-temperature applications. In the case of silica coating layers constituted with various structural titania particles （solid, hollow, and core-shell spherical）, the dependence of transmittance and emissivity of the coating layer on the particle structure and the layer thickness was investigated and optimized. The results indicate that the coating pigmented with core-shell titania particles exhibits a lower infrared transmittance and a lower emissivity value than that with other structural particles and is suitable to radiative heat-insulating applications.

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