Quartz/quartz-boron nitride high-temperature wave-permeable material and preparation method thereof

A technology of high-temperature wave-transmitting and boron nitride, applied in the field of high-temperature wave-transmitting materials and their preparation, can solve problems such as thermal shock resistance and insufficient reliability, and achieve improved mechanical properties and ablation resistance, good bearing capacity, and mechanical properties. and good effect on ablation resistance
CN102167609AActive Publication Date: 2011-08-31NAT UNIV OF DEFENSE TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NAT UNIV OF DEFENSE TECH
Publication Date
2011-08-31

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Abstract

The invention relates to a quartz / quartz-boron nitride high-temperature wave-permeable material and a preparation method thereof. The chemical formula of the quartz / quartz-boron nitride high-temperature wave-permeable material is SiO2f / SiO2-BN; and the wave-permeable material contains 40-65vol% of quartz fiber (SiO2f), 10-30vol% of SiO2 and 5-15vol% of BN. The preparation method comprises the following steps: firstly, preparing a green quartz / quartz ceramic body from quartz textile and SiO2 sol by a sol-gel process; and then, by using the green quartz / quartz ceramic body as well as boric acid, carbamide and ethanol as raw materials, carrying out vacuum impregnation and non-pressure sintering, thus obtaining the quartz / quartz-boron nitride high-temperature wave-permeable material. The quartz / quartz-boron nitride high-temperature wave-permeable material has favorable ablation resistance, mechanical properties and dielectric properties, and has the advantages of simple preparation process, low cost and fine molding and processing performance.
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Description

technical field

[0001] The invention relates to a high-temperature wave-transparent material and a preparation method thereof, in particular to a high-strength, ablation-resistant, wave-transparent ceramic matrix composite material for an ultra-high Mach number missile and a preparation method thereof. Background technique

[0002] In the past 20 years, driven by the demand for precision-guided aircraft, precision-guided technology has developed rapidly. With the advancement of propulsion technology, the flight speed and reentry speed of the aircraft are getting higher and higher. Some aircraft fly at a speed of more than ten Mach (Ma) in the atmosphere, which makes the aerodynamic load and gas heat on the surface of the aircraft It is getting more and more serious, which in turn makes the electromagnetic guidance device of the aircraft put forward higher requirements on the heat resistance and load-bearing performance of the material for its protective parts—radome / window. ...

Claims

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