Lightweight heat-resistant and heat-insulating integrated ceramic composite material and preparation method thereof

By designing a sandwich structure for the preparation of lightweight heat-resistant and heat-insulating integrated ceramic composite materials, the problems of long preparation time and high cost in existing technologies have been solved. This method enables the preparation of ceramic composite materials at high efficiency and low cost, improves the toughness and strength of the materials, and makes them suitable for the high-temperature environment of high-speed aircraft.

CN118359447BActive Publication Date: 2026-05-19NAT UNIV OF DEFENSE TECH
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Patent Information

Application Number
CN202410388945.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-04-01
Publication Date
2026-05-19
Estimated Expiration
2044-04-01

AI Technical Summary

Technical Problem

Existing heat-insulating composite materials have long preparation times and high production costs, and are difficult to meet the high reliability and high efficiency requirements of large-area heat insulation for high-speed aircraft.

Method used

A method for preparing lightweight heat-resistant and heat-insulating integrated ceramic composite materials with a sandwich structure includes designing the thickness and material system of the core layer, upper surface layer and lower surface layer, and using steps such as supercritical drying, hydrophobic treatment, impregnation and curing. The thickness and shape are controlled by a set of molds, and finally, the materials are pyrolyzed and sintered under vacuum conditions.

Benefits of technology

It significantly improves the heat insulation effect of ceramic composite materials, simplifies the preparation process, shortens the preparation cycle, reduces production costs, enhances the toughness and strength of materials, and adapts to the high-temperature environment of high-speed aircraft.

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Abstract

The present application relates to the technical field of ceramic composite material, and discloses a light heat-proof and heat-insulation integrated ceramic composite material and a preparation method, which comprises the following steps: designing the thickness of a core layer, the thickness of an upper surface layer and the thickness of a lower surface layer, and a material system, wherein the thickness of the upper surface layer is greater than that of the lower surface layer; preparing a ceramic composite material preform; preparing an aerogel composite material, wherein the ceramic composite material preform is dried by supercritical drying; performing hydrophobization treatment on the treated ceramic composite material preform, immersing the ceramic composite material preform in an ethyl silicate solution, and then performing high-temperature treatment after taking out; clamping the treated ceramic composite material preform with a mold, immersing it in modified silica sol, and then solidifying, repeating the immersion and solidification for 3-5 times; pyrolyzing and sintering the treated preform under vacuum, and cooling to room temperature to obtain the light heat-proof and heat-insulation integrated ceramic composite material. The preparation period is shortened, and the preparation efficiency is improved.
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