A high-temperature-resistant, heat-insulating, wave-transmitting functional integrated composite material and its preparation method

A technology of composite materials and zirconia, which is applied in the field of inorganic materials, can solve problems such as high-temperature mechanical properties to be improved, low thermal insulation performance and mechanical properties, and inability to meet the requirements of higher temperature environments, so as to avoid the reduction of material wave-transmitting properties, Good heat insulation and wave penetration performance, high strength effect

Active Publication Date: 2021-02-09
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the dielectric properties of quartz fiber felt are excellent, the thermal insulation and mechanical properties are low; the dielectric properties and thermal insulation properties of quartz fiber reinforced airgel materials are good, but the high temperature mechanical properties need to be improved, and the service temperature is only 1000 ° C. Can not meet higher temperature environment requirements

Method used

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  • A high-temperature-resistant, heat-insulating, wave-transmitting functional integrated composite material and its preparation method
  • A high-temperature-resistant, heat-insulating, wave-transmitting functional integrated composite material and its preparation method
  • A high-temperature-resistant, heat-insulating, wave-transmitting functional integrated composite material and its preparation method

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Experimental program
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preparation example Construction

[0034] A method for preparing a composite material with heat-resistant, heat-insulating and wave-transmitting functions integrated, the specific steps are:

[0035] (1) Disperse quartz fiber, alumina fiber, ceramic powder, and starch in deionized water to obtain a mixed slurry of ceramic fiber and ceramic powder;

[0036] The ceramic powder is a mixture of boron nitride, zirconia or zirconium silicate, or a mixture of boron carbide, zirconia or zirconium silicate;

[0037] (2) filtering the above-mentioned ceramic fiber slurry to remove moisture; and drying the filter cake in an oven to obtain a ceramic fiber preform;

[0038] (3) Heat-treat the ceramic fiber preform in a muffle furnace to obtain a rigid ceramic fiber skeleton; during the high-temperature heat treatment process, boron nitride or boron carbide particles form boron oxide to bond the fibers together, so that the fiber skeleton has a good mechanical properties.

[0039] (4) Using SiO 2 Sol, Al 2 o 3 Sol or Al...

Embodiment 1

[0047] (1) Disperse 135g of quartz fiber, 1.2g of boron nitride, 1.5g of zirconia, and 1.4g of starch in 3L of deionized water to prepare ceramic fiber slurry;

[0048] (2) Filter the ceramic fiber slurry to remove water; and dry the filter cake in an oven at 100° C. for 24 hours to obtain a ceramic fiber preform with a thickness of 15 mm;

[0049] (3) heat-treat the ceramic fiber preform in a muffle furnace to obtain a fiber skeleton, the treatment temperature is 1100° C., and the time is 4 hours to obtain a ceramic fiber skeleton;

[0050] (4) Using ethyl orthosilicate as silicon source, deionized water and absolute ethanol as solvent, hydrochloric acid and ammonia as catalyst, prepare SiO 2 Sol;

[0051] (5) Using SiO 2 Sol-impregnated ceramic fiber skeleton, the thickness of the impregnated layer is 10mm;

[0052] (6) SiO 2 After the sol forms a gel, it is aged and supercritically dried to obtain an integrated composite material with high temperature resistance, heat i...

Embodiment 2

[0055] (1) Disperse 120g of quartz fiber, 15g of mullite fiber, 1.5g of boron carbide, 5.25g of zirconia, and 7g of starch in 8L of deionized water to prepare ceramic fiber slurry;

[0056] (2) Filter the ceramic fiber slurry to remove water; and dry the filter cake in an oven at 120° C. for 20 hours to obtain a ceramic fiber preform with a thickness of 15 mm;

[0057] (3) heat-treat the ceramic fiber preform in a muffle furnace to obtain a fiber skeleton, the treatment temperature is 1200° C., and the time is 3 hours to obtain a ceramic fiber skeleton;

[0058] (4) With aluminum sec-butoxide as aluminum source, deionized water and methanol as solvent, acetic acid as catalyst, prepare Al 2 o 3 Sol;

[0059] (5) Using Al 2 o 3 Sol-impregnated ceramic fiber skeleton, the thickness of the impregnated layer is 8mm;

[0060] (6)Al 2 o 3 After the sol forms a gel, it is aged and supercritically dried to obtain an integrated composite material with high temperature resistance,...

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Abstract

The invention relates to a high-temperature-resistant, heat-insulating and wave-transmitting function integrated composite material and a preparation method thereof, belonging to the technical field of inorganic materials. The prepared high-temperature-resistant, heat-insulating and wave-transmitting material has high temperature resistance, high strength, low thermal conductivity, and transparent The characteristics of good wave performance. The high-temperature-resistant, heat-insulating and wave-transmitting function integrated composite material composite material obtained in the present invention has a multi-layer structure in the thickness direction, the high-temperature layer is a fiber skeleton and ceramic particles, and the low-temperature layer is a fiber skeleton, ceramic particles and airgel, and each layer The thickness can be determined according to specific design requirements.

Description

technical field [0001] The invention relates to a high-temperature-resistant, heat-insulating and wave-transmitting function integrated composite material and a preparation method thereof, belonging to the technical field of inorganic materials. The prepared high-temperature-resistant, heat-insulating and wave-transmitting material has high temperature resistance, high strength, low thermal conductivity, and transparent The characteristics of good wave performance. Background technique [0002] The antenna window (cover) is the communication part of the aircraft, but as the flight speed of the aircraft becomes faster and faster, the aerodynamic thermal environment that the antenna window (cover) bears becomes more and more severe. In order to prevent aerodynamic heat from entering the interior of the aircraft through the antenna window (cover), heat insulation materials must be installed inside the antenna window. The performance of the heat insulation material is required: ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/14C04B35/622C04B41/85
CPCC04B35/14C04B35/6224C04B41/4537C04B41/5089C04B41/85C04B2235/3244C04B2235/3821C04B2235/5228
Inventor 李俊宁王晓婷吴文军杨海龙孙陈诚胡子君
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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