Microwave dielectric ceramic powder and preparation method and application thereof

Abstract

The invention discloses microwave dielectric ceramic powder and a preparation method and application thereof. The microwave dielectric ceramic powder comprises ceramic powder prepared from the following raw materials in parts by weight: 35 to 45 parts of strontium carbonate, 15 to 25 parts of titanium oxide, 25 to 35 parts of lanthanum oxide, 5 to 15 parts of aluminum oxide, 0.1 to 0.2 part of cerium oxide and 0.008 to 0.02 part of manganese oxide. The microwave dielectric ceramic powder prepared by the method is a microwave dielectric material with a dielectric constant of 40, a high QxFo [ceramic quality factor] value and low loss, the electrical performance of microwave components such as a cavity filter can be significantly improved, especially the insertion loss of the filter is reduced, and a more stable temperature coefficient is obtained so that the influence on the filter due to use environment factors in actual use is reduced.

Description

technical field [0001] The invention relates to ceramic powder, in particular to a microwave dielectric ceramic powder, a preparation method thereof, and an application thereof. Background technique [0002] Filters and resonators are needed in mobile communication base station systems, and the core raw material for producing filters and resonators is microwave dielectric ceramic powder with a dielectric constant of 40 and a QXFo value of 75,000 or more. The ceramic powder is mainly used in microwave devices such as dielectric resonators, filters, duplexers, microwave integrated circuit substrates, components, dielectric waveguides, and dielectric antennas, and can be used in mobile communications, satellite communications, and military radars. With the rapid development of science and technology, the rapid increase in the amount of communication information, and people's requirements for wireless communication, the use of microwave communication systems such as satellite co...

AI Technical Summary

Problems solved by technology

At present, the high QxFo [ceramic quality factor] value microwave dielectric raw materials with a dielectric constant of 40 in China are almost monopolized by Japan at this stage, and raw material powders of this specification need to be imported from Japan in other countries, and the price is expensive and the delivery time is long.

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