Microwave dielectric ceramic and preparation method thereof

Abstract

The invention provides a microwave dielectric ceramic and a preparation method thereof.The microwave dielectric ceramic comprises a main crystal phase.The chemical expression of the main crystal phase is Zr0.8Sn0.2-x(Mg1/3Nb2/3)xTiO4, wherein x is larger than 0 and smaller than or equal to 0.2.An experiment indicates that the microwave dielectric ceramic has good microwave dielectric performance, wherein the dielectric constant epsilon r can be adjusted within the range of 38 to 42; the quality factor Q*f is equal to 60,000 to 70,000 GHz; the frequency temperature coefficient tau f can be adjusted within the range of -2.5*10<-6>/DEG C to +6.3*10<-6>/DEG C, and the temperature characteristic is stable.The preparation method of the microwave dielectric ceramic is low in sintering temperature, energy cost is reduced, and the low carbon and environmental protection concept is met.The preparation process is simple, no special equipment or strict process condition is needed, and the microwave dielectric ceramic is suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of electronic materials and components, and in particular relates to a microwave dielectric ceramic and a preparation method thereof. Background technique [0002] Microwave dielectric material is a new type of functional electronic ceramic material developed rapidly in the last 20 years. It is the key material in microwave devices such as filters, duplexers, resonators and dielectric waveguide circuits. It is widely used in microwave communication equipment such as satellite communication, mobile communication, electronic countermeasures and airborne communication. It is the leading material for current dielectric materials. One of the hot spots. [0003] Zr 0.8 sn 0.2 TiO 4 As a traditional microwave dielectric material, ceramics have an intermediate permittivity (ε r ≈40), high quality factor Q* f , near-zero resonant frequency temperature coefficient τ f Equal microwave dielectric properties, but there is a...

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Problems solved by technology

[0003] Zr 0.8 sn 0.2 TiO 4 As a traditional microwave dielectric material, ceramics have an intermediate permittivity (ε r ≈40), high quality factor Q* f , near-zero resonant frequency temperature coefficient τ f Equal microwave dielectric properties, but high sintering temperature (higher than 1400°C), high energy consumption in the preparation process, does not meet the concept of low-carbon environmental protection

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