Microwave ferrite material and microwave dielectric ceramic high-temperature co-firing method

Abstract

The invention provides a microwave ferrite material and microwave dielectric ceramic high-temperature co-firing method. According to the method, an auxiliary agent is added; the raw material grain diameter is regulated; a transition layer is inserted; the raw diaphragm thickness is controlled; the sintering temperature, the compacting speed rate, the sintering shrinking rate and the thermal expansion speed rate of two ceramic materials are regulated and controlled; the defects of warping, slabbing, cracks and the like caused by high-temperature co-firing are reduced; secondly, a high-quality raw porcelain belt is obtained by optimizing the tape casting formation process; finally, high-temperature co-firing is performed by a space limitation sintering method; the inner stress is ensured to be uniformly released; microdefects at the ceramic compound interface are reduced or inhibited. The method has the advantages that the problem of serious co-firing mismatching of microwave dielectric ceramic materials and microwave ferrite materials is solved; the high-temperature matched co-firing of 3 to 30 layers of microwave dielectric ceramic materials and microwave ferrite materials is realized; a material foundation is laid for further miniaturization of multilayer high-temperature and low-temperature co-firing microwave devices.

Description

technical field [0001] The invention relates to the field of high-temperature co-firing of multilayer heterogeneous ceramics, in particular to a method for high-temperature co-firing of microwave ferrite materials and microwave dielectric ceramics. Background technique [0002] With the continuous development of electronic information technology, higher requirements are put forward for the integration of microwave components, the electrical performance, volume, weight, reliability and consistency of amplitude and phase of microwave components, especially for airborne, satellite On-board and ship-borne microwave components have more stringent requirements on performance, volume, and quality because of their higher and higher operating frequencies. Traditional microwave devices are made of microwave dielectric ceramics or microwave ferrite materials. Although the reliability is high, the frequency characteristics of a single material are not good, which cannot meet the system'...

AI Technical Summary

Problems solved by technology

However, due to the mismatch of sintering characteristics such as the firing temperature and shrinkage of the two heterogeneous layers of dielectric materials and ferrite materials, co-sintering these materials in the form of stacks will cause As a result, defects such as warping, cracking and micro-cracks appear in different degrees inside the ceramic body, which makes it difficult to apply high-temperature co-fired materials or seriously affects the performance and reliability of microwave devices.

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