Ceramic wave-transmitting material matched with performance of infrared material, antenna housing and preparation method

Abstract

The invention relates to a ceramic wave-transmitting material matched with performance of an infrared material, an antenna housing and a preparation method. The ceramic wave-transmitting material comprises the following raw materials: silicon nitride, a sintering aid, titanium oxide and magnesium titanate, wherein the weight ratio of the silicon nitride to the sintering aid to the mixture of the titanium oxide and the magnesium titanate is (70-95): (5-15): (5-25). The titanium oxide, the magnesium titanate, the silicon nitride and the sintering aid are creatively used for preparing the ceramicwave-transmitting material matched with the dielectric property of the infrared material, so that the dielectric constant of the prepared material is improved. The ceramic wave-transmitting materialand the infrared material are assembled together to prepare the composite radome body, the dielectric property and the thermal physical property of the radome body developed by the ceramic wave-transmitting material are matched with those of an infrared window material, the consistency of assembly is ensured, and as the dielectric properties of the ceramic wave-transmitting material and the infrared material are close to each other, the problems of phase delay and the like are solved, and the guidance precision of the composite radome is greatly improved.

Description

technical field [0001] The invention relates to a ceramic material, in particular to a ceramic wave-transmitting material matching the performance of an infrared material, a radome and a preparation method. Background technique [0002] With the rapid development of science and technology, the battlefield environment of future wars will become increasingly complex, requiring precision-guided weapons to accurately intercept and track targets under complex backgrounds and strong interference. Each guidance method has its own characteristics, and there are defects in only a single guidance technology. Therefore, under the high-tech and informationized warfare mode, it is difficult to use a single guidance method to complete the combat mission, and it is necessary to develop a multi-mode compound homing guidance method. Among them, radar / infrared composite guidance has attracted more attention, especially in the fields of cruise missiles, tactical air-to-surface missiles, air d...

AI Technical Summary

Problems solved by technology

[0004] However, the radome developed by the existing preparation method generally has the problem of radar wave phase delay, which seriously affects the precise guidance of the radome, which has become an urgent problem for those skilled in the art to overcome

[0005] Silicon nitride ceramic material, as a ceramic material with relatively high wave transparency, is the preferred material for making composite radome, but the existing silicon nitride material is often used as the material of a single guidance radome. There is no thermal, electrical, etc. matching with other components

When matching the existing silicon nitride materials with infrared materials such as magnesium fluoride materials, it is found that its thermal physical properties such as dielectric constant and thermal expansion coefficient are not well matched with magnesium fluoride materials. The problems of delay and poor guidance accuracy cannot be directly used to prepare composite radomes