Low-temperature sintered medium-dielectric-constant microwave dielectric ceramic material and preparation method thereof

Abstract

The invention discloses a low-temperature sintered medium-dielectric-constant microwave dielectric ceramic material and a preparation method thereof, the low-temperature sintered medium-dielectric-constant microwave dielectric ceramic material comprises a base material and an additive, and the preparation method of the low-temperature sintered medium-dielectric-constant microwave dielectric ceramic material comprises the following steps: step 1, burdening; 2, carrying out primary ball milling; step 3, performing solid-phase synthesis; 4, carrying out secondary ball milling; step 5, granulatingand molding; and step 6, sintering; the method comprises the following steps: step 1. MgO, TiO2, CaCO3 and La2O3 are used as raw materials; according to the invention, the sintering temperature of the traditional microwave-based ceramic is reduced; the microwave dielectric ceramic has the advantages of energy conservation, excellent performance, simple sintering condition, air sintering atmosphere, wide sintering range, high stability, greatly improved quality factor and great practical value, the raw materials are all domestic raw materials, the price is moderate, the formula does not contain heavy metals, and the microwave dielectric ceramic is environment-friendly and pollution-free.

Description

technical field [0001] The invention relates to the technical field of electronic information functional ceramic materials, in particular to a low-temperature sintered dielectric constant microwave dielectric ceramic material and a preparation method thereof. Background technique [0002] The new 5G antenna has brought about a significant increase in the use of filters. In the 5G era, the demand for base station antenna materials has changed significantly. Since AAU will support more channels and the device integration is higher, the process complexity and product value of ceramic dielectric filters will increase with With the improvement, the number of filters used by AAU is more than that of 4G RF front-end; 5G has a higher operating frequency band and higher transmission power, and has higher requirements on the transmission loss and heat dissipation performance of filter materials, which cannot be achieved by traditional metal cavity filters High suppression system compa...

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Problems solved by technology

[0002] The new 5G antenna has brought about a significant increase in the use of filters. In the 5G era, the demand for base station antenna materials has changed significantly. Since AAU will support more channels and the device integration is higher, the process complexity and product value of ceramic dielectric filters will increase with With the improvement, the number of filters used by AAU is more than that of 4G RF front-end; 5G has a higher operating frequency band and higher transmission power, and has higher requirements on the transmission loss and heat dissipation performance of filter materials, which cannot be achieved by traditional metal cavity filters High suppression system compatibility problems, and ceramic dielectric material cavity can solve these problems. Microwave dielectric ceramic wave device is an important solution for 5G in the future. The development of microwave dielectric ceramics with serialized dielectric constant and excellent performance has always been a domestic and foreign one. Key research topics, the problem of MgTiO3-Ca0.6La0.8 / 3TiO3-based microwave materials currently on the market is that the sintering temperature is too high, exceeding 1350 ° C, which will easily lead to excessive grain size and high energy consumption. At the same time, the sintering range is narrow and the product The pass rate is low. The second is that the Qf value of the material is low, which is lower than 50000 GHz, which leads to a large insertion loss of the resonator or filter and affects the performance of the device.

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