Ceramic radome composite material and forming method thereof

Abstract

The invention discloses a forming method of a ceramic radome composite material, which comprises the following steps of: 1) preparing a basalt fiber prefabricated part: weaving satin cloth by adopting continuous basalt fibers, and making two layers of satin cloth, a basalt fiber grid fixing layer and a basalt fiber web body into a unit layer for laying, performing layer-by-layer needling to form an integral fabric, and performing penetration sewing by adopting a sewing line to form a basalt needling prefabricated member; (2) dipping and forming; 3) sintering at low temperature; and 4) repeating the steps 2) and 3) twice to form the ceramic radome composite material. The invention also discloses the ceramic radome composite material formed by the method. The basalt fiber preform material disclosed by the invention is impregnated and sintered by silica sol, so that the obtained material not only has relatively good wave-transparent performance, but also has relatively high temperature tolerance and relatively good mechanical, electrical and thermal properties, can replace a resin-based wave-transparent material, and overcomes the defect that the resin-based wave-transparent material cannot be used for a long time in a medium-temperature environment.

Description

technical field [0001] The invention belongs to the technical field of forming ceramic base and wave-transparent composite ceramics for aerospace, and in particular relates to a ceramic radome composite material and a forming method thereof. Background technique [0002] The radome is placed on the head of the projectile, which plays a structural role in ensuring the aerodynamic appearance of the projectile and the antenna system from the external environment. In terms of function, it must have good electromagnetic wave permeability and heat insulation. Among them, the quartz fiber reinforced composite ceramic material has excellent characteristics of high temperature resistance, high toughness, and low dielectric. It is widely used in medium and short-range missiles. It is also the most mature radome ceramic material with stable technology and high temperature to 1000 The mechanical properties will not decrease at ℃; in addition, the organic materials for radome mainly incl...

AI Technical Summary

Problems solved by technology

[0003] To sum up, there is currently no suitable radome material on the market for the radome with an operating temperature of around 600°C. With the development of weapon models, the demand for mid-temperature resistant and wave-transparent composite materials is gradually increasing.