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High-temperature-resistant low-expansion-coefficient bonding slurry for ceramic-based composite material and preparation method of high-temperature-resistant low-expansion-coefficient bonding slurry

A low-expansion coefficient, composite material technology, applied in the field of adhesives, can solve the problem of high thermal expansion coefficient of glass powder

Active Publication Date: 2021-01-15
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the commonly used glass powder has a high thermal expansion coefficient, which is much higher than that of quartz ceramics (0.47-0.58×10 -6 / °C)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028]The above-mentioned high temperature resistant low expansion coefficient bonding slurry for ceramic matrix composite materials and a preparation method thereof include the following steps:

[0029]1. Prepare basic glass powder: weigh 65% SiO2, 14% Al2O3, 7% of B2O3, 6% MgO, 2% BaO, 2% CaO, 2% ZnO, 2% ZrO2Mix evenly in a mixer for 12 hours; then in a high temperature resistance furnace at 1600°C for 1.5 hours to obtain a clear glass liquid; then the glass liquid is quenched in deionized water and taken out, and placed in a blast drying oven at 100°C Drying for 4 hours to obtain glass slag; ball mill the glass slag in a planetary ball mill for 8 hours and pass through a 500-mesh sieve to obtain a basic glass powder with a particle size of 1.0 μm ~ 2.5 μm;

[0030]2. Preparation of glass-ceramic powder: add 5% β-eucryptite to the basic glass powder, ball mill for 2h, sieving with a 400-mesh sieve after drying, and heat the sieved raw materials in a resistance furnace at 1300℃ for 1h Af...

Embodiment 2

[0037]1. Prepare basic glass powder: weigh 70% SiO2, 13% Al2O3, 5% of B2O3, 3% MgO, 2% BaO, 0% CaO, 2% ZnO, 2% ZrO2And 3% La2O3Mix uniformly in a mixer for 20 hours; then keep it in a high temperature resistance furnace at 1600°C for 2 hours to obtain a clear glass liquid; then, the glass liquid is quenched in deionized water and taken out, placed in a blast drying oven, and dried at 100°C Dry for 4 hours to obtain glass slag; place the glass slag in a planetary ball mill for 8 hours and pass through a 500-mesh sieve to obtain a basic glass powder with a particle size of 1.0 μm ~ 2.5 μm;

[0038]2. Preparation of glass-ceramic powder: add 5% β-eucryptite to the basic glass powder, ball mill for 2h, sieving with a 400-mesh sieve after drying, and heat the sieved raw materials in a resistance furnace at 1300℃ for 1h After clarification, water quenching, ball milling, and drying are performed to obtain the glass ceramic powder;

[0039]Specifically, after testing, the softening point of the ...

Embodiment 3

[0045]1. Prepare basic glass powder: weigh 70% SiO2, 13% Al2O3, 5% of B2O3, 3% MgO, 2% BaO, 0% CaO, 2% ZnO, 2% ZrO2And 3% CeO2Mix uniformly in a mixer for 20 hours; then keep it in a high temperature resistance furnace at 1600°C for 2 hours to obtain a clear glass liquid; then, the glass liquid is quenched in deionized water and taken out, placed in a blast drying oven, and dried at 100°C Dry for 4 hours to obtain glass slag; place the glass slag in a planetary ball mill for 8 hours and pass through a 500-mesh sieve to obtain a basic glass powder with a particle size of 1.0 μm ~ 2.5 μm;

[0046]2. Preparation of glass-ceramic powder: add 10% β-eucryptite to the basic glass powder, ball mill for 2 hours, sieve with a 400 mesh sieve after drying, and heat the sieved raw materials in a resistance furnace at 1300℃ for 1 hour After clarification, water quenching, ball milling, and drying are performed to obtain the glass ceramic powder;

[0047]Specifically, after testing, the softening point ...

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Abstract

The invention relates to high-temperature-resistant low-expansion-coefficient bonding slurry for a ceramic-based composite material and a preparation method of the high-temperature-resistant low-expansion-coefficient bonding slurry. The bonding slurry comprises the following components in percentage by weight: 55%-85% of microcrystalline glass powder and 15%-45% of an organic bonding phase, wherein the microcrystalline glass powder is mixed powder of SiO2-Al2O3-B2O3-MgO-BaO-ZnO-ZrO2 series microcrystalline glass powder and beta-eucryptite microcrystalline glass powder, and the organic bondingphase comprises an organic solvent, a dispersing agent and a thickening agent. According to the invention, by adjusting the variety and content of each oxide in the microcrystalline glass powder, theadjustment of the thermal expansion coefficient, dielectric constant, dielectric loss, glass transition temperature, softening temperature, crystallization temperature and the like of the microcrystalline glass powder is realized, and finally, the thermal expansion coefficient of the bonding slurry is equivalent to the thermal expansion coefficient of a ceramic base material and the wave-transparent use requirement of a specific frequency band can be met; and a ceramic material sample piece connected by using the bonding slurry has good bonding performance.

Description

Technical field[0001]The invention relates to the technical field of adhesives, in particular to a high-temperature adhesive slurry for wave-transmitting ceramic-based composite materials and a preparation method thereof.Background technique[0002]In recent years, the ceramic base frequency selective surface (FSS) radome has become more and more widely used in stealth. The FSS structure needs to withstand the high-temperature air flow during flight and can work for a long time in harsh aerodynamic environments. In order to ensure the reliability of the FSS structure, it is a feasible solution to place the FSS structure inside the ceramic substrate. At this time, the combined connection of the outer wave-transmitting protective layer and the FSS-containing structural layer has become the focus of research.[0003]The composition of the ceramic radome is a fiber-reinforced ceramic matrix composite material, which has poor processability and loose structure, making it difficult to manufac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C8/24C03C10/12
CPCC03C8/24C03C10/0045
Inventor 崔凤单高文博王涛张剑吕毅
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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