Microwave dielectric ceramic material as well as preparation method and application thereof: Fid-Bau Portal

Microwave dielectric ceramic material as well as preparation method and application thereof

LI LI

The invention provides a microwave dielectric ceramic material as well as a preparation method and an application thereof, and relates to the technical field of materials. According to the microwave dielectric ceramic material provided by the invention, BaTi4O9 and BaZn2. 03Ti3. 89O10.89 in a specific ratio are used as crystal phases, the dielectric constant of the microwave dielectric ceramic material is about 36 and the temperature coefficient of resonance frequency is close to zero by compounding the BaTi4O9 and the BaZn2. 03Ti3. 89O10.89, the thermal shock resistance of the material can be greatly improved by introducing BN and AlN into the system, a first modifier and a third modifier composed of specific components are introduced, so that the sintering temperature of the microwave dielectric ceramic can be reduced, and the dielectric property of the microwave dielectric ceramic can be improved. Compared with the traditional BaTi4O9-based microwave dielectric ceramic material, the microwave dielectric ceramic material disclosed by the invention has the advantages that the sintering temperature is reduced by about 30 DEG C, the quality factor is higher, the thermal shock temperature difference is 155-160 DEG C, and the thermal shock resistance is good.

本发明提供了一种微波介质陶瓷材料及其制备方法和应用，涉及材料技术领域。本发明提供的微波介质陶瓷材料，以特定配比的BaTi4O9和BaZn2.03Ti3.89O10.89为晶相，二者复合能够使得微波介质陶瓷材料的介电常数在36附近，谐振频率温度系数接近于零，通过在上述体系中引入BN、AlN能够大幅度提高材料的抗热震性能，引入由特定组分组成的第一改性剂和第三改性剂，能够降低微波介质陶瓷的烧结温度，提高微波介质陶瓷的介电性能。相较于传统的BaTi4O9基微波介质陶瓷材料，本发明的微波介质陶瓷材料的烧结温度降低了约30℃，品质因数较高，热震温差为155～160℃，抗热震性好。

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