The Performance and Application of High-temperature Functional Coatings

A radar component is made of high-temperature-resistant composite materials. For long-term use at a temperature of 200°C, and to withstand certain temperature impacts, it should have a dielectric constant that is not greater than 3.5 at a certain frequency, a dielectric loss not greater than 0.03, an emissivity not greater than 0.085, and a thickness of no more than 0.15 mm. Aiming at the requirements, the properties of three kinds of organosilicon-modified coating systems were studied, and the optimal coating system that meets the needs of radar are selected. According to the actual situation of the component and the characteristics of the selected coating system, the construction process of the rapid volatilization coating was completed. The coating has effectively resisted the high-temperature effect and played a functional role, providing reliable technical support for the development of the radar.