Production method of quartz composite ceramic radome with polytetrafluoroethylene damp-proof coating

Abstract

The invention relates to a production method of a quartz composite ceramic radome with polytetrafluoroethylene damp-proof coating; the production method comprises the steps of pretreating quartz fiber profiled fabric; impregnating the quartz fiber profiled fabric, combining, and drying; subjecting the quartz fiber profiled fabric base to vacuum impregnating, concentrating, performing integrated compositing, and drying; subjecting the base to high-temperature thermal treatment, and performing machining. A polytetrafluoroethylene coating layer is formed on the surface of the radome. The PTFE (polytetrafluoroethylene) film formed on the surface of the quartz ceramic, bringing good low dielectric constant, continuous high vapor barrier performance, excellent high and low temperature stability, and high weatherability, can provide ultralow damp-proof performance for the storage of radomes and antenna windows for missile weapon systems in severe environments.

Description

technical field [0001] The invention relates to the technical field of radome moisture-proof coatings, in particular to a method for preparing a quartz composite ceramic radome with a polytetrafluoroethylene moisture-proof coating on the surface. Background technique [0002] The radome and antenna window are important components of the missile weapon system structure, and are the key components to protect the normal operation of the missile weapon system communication, telemetry, guidance, and detonation systems. They must have excellent wave penetration, heat release, load bearing, and weather resistance. A variety of functions. With the continuous development of missile weapon systems in the direction of supersonic speed and the continuous improvement of strike range and guidance accuracy, radome and antenna window should have good and stable wave transmission performance in a wider frequency band and better thermal shock resistance . Because of its high porosity, quart...

AI Technical Summary

Problems solved by technology

[0004] (2) It has good dielectric properties and cannot significantly reduce the wave-transmitting performance of the quartz composite ceramic material;

[0007] Existing moisture-proof coatings generally use inorganic coatings, and the preparation of inorganic coatings generally requires higher temperatures, which will cause greater damage to the base material

And often due to the thermal expansion coefficient mismatch between the coating and the substrate, it is easy to crack and fall off