Low dielectric constant microwave dielectric ceramic and preparation method thereof

Abstract

The invention discloses a low dielectric constant microwave dielectric ceramic and a preparation method thereof. The raw materials of the CZTG microwave dielectric ceramic and the MZTG microwave dielectric ceramic are respectively measured according to the mass ratio of 3:1:1:3, and the raw materials are respectively measured according to the mass ratio of 1:1. Add absolute ethanol by mass ratio, mix by wet grinding for 4 hours, dry at 120-140°C, sieve with an 80-mesh sieve, and press into corresponding blocks after sieving, and then respectively at 5°C / min. Under the heating rate of 100%, the temperature was raised from room temperature to 1100°C, and the temperature was kept at this temperature for 4 hours to obtain the corresponding sinter, which was then put into a nylon jar with absolute ethanol and ball-milled for 4 hours according to the mass ratio of 1:1. After granulation, the powder was pressed into a cylinder and degummed at 550°C for 4 hours, and the powder was dried at different temperatures for 4 hours. After sintering for 4 hours, the overall performance of the corresponding microwave dielectric ceramics is better.

Description

technical field [0001] The invention relates to the technical field of electronic ceramics and their manufacture, in particular to a low dielectric constant microwave dielectric ceramic and a preparation method thereof. Background technique [0002] Microwave dielectric materials refer to ceramics that are used in microwave frequency (300MHz~300GHz) circuits as a medium and perform one or more functions. They are mainly used to prepare microwave components such as resonators, filters, dielectric antennas, and dielectric waveguide circuits. . In recent years, with the continuous development of microwave components in the direction of low cost, miniaturization and light weight, microwave dielectric materials are required to have excellent microwave dielectric properties (high Q×f value, moderate dielectric constant ε). r , near zero τ f value), low production cost, and low density, but the overall performance of the currently used microwave dielectric ceramics is not very go...

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Problems solved by technology

In recent years, with the continuous development of microwave components in the direction of low cost, miniaturization and light weight, this requires microwave dielectric materials to have excellent microwave dielectric properties (high Q×f value, moderate dielectric constant ε r , near zero τ f value), low production cost, and low density, but the overall performance of the microwave dielectric ceramics currently used is not very good

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