On March 29, 2022, China's first solid-bound medium-sized carrier rocket, the Long March 6, was successfully launched at the Taiyuan Satellite Launch Center. It is proud that the heat-resistant coating used for the tail section of the rocket is developed by ZJTY Aerospace Thermal Insulation Material Technology Corporation, which is also the ZJTY high-performance thermal insulation material that has been used in Chinese rocket launches for many times.
Compared with other similar products on the market, the lightweight thermal vibration protective coatings developed by ZJTY have better performance in reducing thermal conductivity and ablation rate.
Lightweight rocket thermal protection coating is a composite ablative thermal protection coating, which belongs to an active thermal protection system and realizes thermal protection by taking away heat through fluid or mass loss. The corrosion process is a physical and chemical process in which mass and energy are converted into each other, and the mechanisms involved are complex, including interactions such as pyrolysis, thermal radiation, thermal diffusion, and thermal conduction.
The ZJTY R&D team has independently developed high temperature resistant, low thermal conductivity and high strength thermal insulation ceramic microspheres in the early stage, which greatly reduces the thermal conductivity of the thermal coating. Contradictory technical problems of sprayable technology.
Features:
· Ultra-low thermal conductivity, low ablation rate, light weight, chemical and weather resistance, low cost, simple process, repairable and reusable
· The average density of the coating after drying of the heat protection coating is ≤ 0.5 g/cm3; (light)
· The thermal conductivity of the coating after drying of the thermal protection coating is ≤0.12 W/m·K; (low ablation rate)
The tensile strength of the coating after drying of the heat-resistant coating is ≥1.5 MPa, and the elongation at break is ≥5%,
· To conduct static radiation heating test and thermal vibration coupling test under short-time (within 250s) high heat flow (400 KW/m2 magnitude) conditions, the temperature rise of the backside of the aluminum alloy metal thin-walled cabin is required to be lower than 150°C, and The thermal protection coating retains at least 20% of the original thickness without changing physical properties; (chemical and weather resistance)
· Competitive cost with similar mature thermal insulation materials, which can achieve one-third to one-quarter of similar products