Silicon nitride - boron nitride- silicon dioxide ceramic wave-transparent material and preparation process thereof

A technology of wave-transmitting material and silicon dioxide, which is applied in functional ceramic materials and special fields, can solve the problems of poor ablation performance, influence wave-transmitting performance, and large dielectric constant, and achieve good mechanical properties and dielectric properties. The method is scientific and reasonable, and the effect that meets the application requirements

Active Publication Date: 2005-01-26
SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] High-performance ceramic wave-transparent materials are one of the key directions of material research at home and abroad. In the past, the research focused on quartz ceramics. Due to the low mechanical and temperature resistance and poor ablation performance of quartz ceramics, its application has been greatly affected. limits
In recent years, research on silicon nitride ceramics and boron nitride ceramic materials has been mainly carried out internationally. Si

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  • Silicon nitride - boron nitride- silicon dioxide ceramic wave-transparent material and preparation process thereof
  • Silicon nitride - boron nitride- silicon dioxide ceramic wave-transparent material and preparation process thereof

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Embodiment 1

[0029] density

Embodiment 2

[0031] density

[0032] Others are with embodiment 1.

Embodiment 3

[0034] density

[0035] Others are with embodiment 1.

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Abstract

The invention relates to a ceramic wave-transmitting material and preparing method thereof, wherein the material is prepared from sub-micron high purity silicon nitride, boron nitride, zirconium dioxide and nano silica flour through batching, homogeneously mixing by means of supersonic wave and chemical dispersion method, forming through cold isostatic compaction method, and high-sintering in nitrogen atmosphere.

Description

technical field [0001] The invention relates to a ceramic wave-transparent material and a preparation method thereof, and belongs to the technical field of special and functional ceramic materials. Background technique [0002] The performance of the radome depends on the selected material. In the guidance system, the transmission efficiency and aiming error of the radome are very sensitive to the dielectric properties of the material and their relationship with temperature, frequency, etc., and the material is required to have a low dielectric constant ( ε<10) and dielectric loss, and the dielectric properties do not change significantly with temperature and frequency (such as temperature rise of 100°C, ε change<1%). The high Mach number of the missile makes the instantaneous heating rate of the radome as high as 120°C / S or more. Therefore, when the temperature is raised, the molecular structure of the material is required to be stable, and the material properties (su...

Claims

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Application Information

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IPC IPC(8): C04B35/14C04B35/48C04B35/583C04B35/584C04B35/622
Inventor 张伟儒王重海刘子峰高芳刘建范景林徐鸿照
Owner SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS
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