Preparation method of moisture-proof wave transmission quartz fiber/phosphate ceramic composite material

Abstract

The invention relates to a preparation method of a moisture-proof wave transmission quartz fiber/phosphate ceramic composite material. The method includes the steps of: preparing an aluminum phosphate solution: introducing an aluminum salt into a phosphoric acid aqueous solution, setting the water bath temperature at 60-100DEG C to obtain a transparent aluminum dihydrogen phosphate water solution; preparing a ceramic slurry containing one or two of silicon nitride, boron nitride, alumina or silicon oxide, taking ethanol or methanol as the solvent, and adopting fluorine containing silane as the dispersing agent; adding the obtained aluminum dihydrogen phosphate water solution into the ceramic slurry, further conducting ball milling to obtain a ceramic particle/aluminum phosphate composite ceramic slurry, employing vibration molding, letting the obtained ceramic particle/aluminum phosphate composite ceramic slurry fully impregnate quartz fiber cloth, stacking up the obtained fiber cloth layer by layer, and conducting compression molding at a pressure of 2-10MPa so as to obtain a composite impregnation material; and putting the composite impregnation material into a drying box to conduct curing treatment at a curing temperature of 80-200DEG C for 12-72h, thus obtaining the quartz fiber/phosphate ceramic composite material.

Description

technical field [0001] The invention relates to a method for preparing a moisture-proof wave-transmitting quartz fiber / phosphate ceramic composite material, and belongs to the technical field of ceramic composite material preparation methods. Background technique [0002] Phosphate polymer materials have low preparation temperature, rheological behavior similar to resin liquid, and low density (1.8~2.8g / cm 3 ), high mechanical strength, extremely low thermal expansion coefficient (2~6×10 ～6 / K), high heat-resistant temperature, good structural designability and high-temperature oxidation resistance, etc., can meet the requirements of various special functions, and are widely used in various rockets, missiles and other space vehicle radomes. Performance fiber composite material (FRP) is an ideal matrix material. For example, the developed quartz fiber reinforced chromium aluminum phosphate composite material has a curing temperature of 170°C, a service temperature of 1200°C...

AI Technical Summary

Problems solved by technology

The biggest problem encountered in the application of phosphate polymer composites is its high dielectric constant and high moisture absorption characteristics, which seriously affect the storage period and service stability of composite materials, and low dielectric and moisture-proof treatment are required

However, due to the high application sensitivity and confidentiality of this series of materials, the relevant processing technology has not been reported.