Preparation method of quartz fiber strengthening chromium phosphate radome material

Abstract

The invention discloses a preparation method of a quartz fiber strengthening chromium phosphate radome material. The preparation method comprises the following steps of: coating a protective coating on quartz fiber cloth and coating chromium a phosphate aluminium base material, and the preparation method is characterized in that the protective coating is coated in the following steps of: preparing a first layer of masking liquid and a second layer of masking liquid by taking organic siliconresin, ethyl orthosilicate, aluminium oxide colloidal sol, silica sol, chromic oxide sol, zirconia sol and a silane coupling agent; placing quartz fiber in the first layer of masking liquid for dipping and pulling, drying the surface at room temperature, placing in the second layer of masking liquid for dipping and pulling, and drying the surface at room temperature; and placing for 4-6h under 80-110 DEG C, and carrying out precuring; and curing the quartz fiber cloth coated with the masking liquid after the precuring at 130-170 DEG C for 5-8 h, thus preparing the quartz fiber cloth with the protective coating. The material prepared by the preparation method provided by the invention has the advantages of high temperature resistance, low cost electricity, abrasion proof performance and the like, and is used for the field of aerospace, and has good property.

Description

technical field [0001] The invention belongs to a composite material fiber interface protection method, and relates to a preparation method of a quartz fiber reinforced chromium aluminum phosphate wave-transmitting material. It is especially suitable for the preparation of quartz fiber reinforced chromium aluminum phosphate wave-transparent material with interface composite protective coating. The interface composite protective coating prepared by the present invention is mainly suitable for the fiber composite wave-transparent material with acidic chromium aluminum phosphate as the matrix. Anti-acid corrosion protection and hot pressure protection. Background technique [0002] High-temperature broadband radome material technology is the basis for high-speed precision navigation space weapons and one of the indispensable key technologies for the development of hypersonic surface-to-air missiles, anti-radiation missiles and cruise missiles. It directly restricts the developm...

AI Technical Summary

Problems solved by technology

The protection of quartz fiber mainly solves the following problems: (1) Quartz fiber has excellent acid resistance, but quartz fiber is sensitive to acidic chromium aluminum phosphate, and acidic chromium aluminum phosphate, especially at high temperature, severely corrodes quartz fiber, making quartz The strength of the fiber decreases; (2) Under high temperature conditions, silica crystals will precipitate on the surface of the quartz fiber, which will affect the interface between the fiber and the chromium aluminum phosphate matrix, and will also reduce the mechanical properties of the composite material; (3) Quartz fiber reinforcement The chromium-aluminum phosphate composite material is mainly formed by hot pressing, and the brittle inorganic filler will indent the surface of the quartz fiber during hot pressing, greatly reducing the strength of the quartz fiber

Due to the low strength of quartz fiber among inorganic fibers and the above three factors, the strength of quartz fiber-reinforced chromium aluminum phosphate composite material is lower, which limits the application of chromium aluminum phosphate wave-transparent materials.