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High-Q-value microwave dielectric ceramic powder, microwave dielectric ceramic, preparation method and application

A technology of microwave dielectric ceramics and powders, applied in the field of microwave dielectric ceramics, can solve the problems of unsatisfactory comprehensive performance and cannot be obtained at the same time, and achieve the effects of excellent comprehensive performance, low production cost and good temperature stability

Inactive Publication Date: 2021-03-19
SUZHOU RF TOP ELECTRONICS COMM
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Problems solved by technology

In addition, the existing microwave dielectric ceramics with a dielectric constant of about 90 cannot simultaneously obtain a high quality factor and a near-zero resonance frequency temperature coefficient, that is, the overall performance is not ideal; therefore, it is necessary to develop a 2 o 3 Microwave dielectric ceramic powder and microwave dielectric ceramics with high Q value, medium dielectric constant and near zero resonant frequency temperature coefficient

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  • High-Q-value microwave dielectric ceramic powder, microwave dielectric ceramic, preparation method and application

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preparation example Construction

[0022] The raw materials for the preparation of the high-Q microwave dielectric ceramics include barium carbonate, lanthanum oxide, samarium oxide, bismuth oxide, and titanium oxide, the mass ratio of which is based on the composition expression Ba 6-3x (La 1-y-z SM y Bi z ) 8+2x Ti 18 o 54 Calculate the molar ratio of each element.

[0023] The present invention also provides a preparation method of high-Q microwave dielectric ceramics, comprising the following steps:

[0024] (1) According to the composition expression Ba 6-3x (La 1-y-z SM y Bi z ) 8+2x Ti 18 o 54 The molar ratio of each element in BaCO 3 Powder, La 2 o 3 Powder, Sm 2 o 3 Powder, Bi 2 o3 Powder, TiO 2 The powder is batched, and all the oxide powders are mixed fully and then ball milled. After the ball milling, they are dried and sieved, and then put into a corundum crucible for roasting to obtain a pre-fired powder; wherein, in the composition expression Ba 6-3x (La 1-y-z SM y Bi z ) ...

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Abstract

The invention discloses a high-Q-value microwave dielectric ceramic as well as a preparation method and an application of the high-Q-value microwave dielectric ceramic.The composition expression of the microwave dielectric ceramic is Ba6-3x(La1-y-zSmyBiz)8+2xTi18O54, wherein x, y and z respectively represent molar ratios, and x=2 / 3, y=0.7, and z=0.05-0.075. The invention further discloses high-Q-value microwave dielectric ceramic powder. The microwave dielectric ceramic disclosed by the invention does not contain Nd, is low in production cost, has a dielectric constant of about 90, can meet the use requirements of microwave components required by base station construction and the like, has a near-zero resonant frequency temperature coefficient, good temperature stability, a relatively highquality factor (Q*f) and relatively excellent comprehensive performance.

Description

technical field [0001] The invention belongs to the technical field of microwave dielectric ceramics, and in particular relates to a high-Q value microwave dielectric ceramic powder and microwave dielectric ceramics, a preparation method and an application. Background technique [0002] With the development of the international and domestic mobile communication industry towards 5G, a large number of ceramic filters with a dielectric constant of 90 need to be used in the construction of mobile communication base stations. At present, domestic high Q×F value microwave dielectric ceramic powders with a dielectric constant of 90 are almost monopolized by Japan at this stage. The raw material powders of this specification in other countries need to be imported from Japan, which is expensive and has a long delivery time. Moreover, the general microwave dielectric ceramic raw material with a dielectric constant of 90 can only contain Nd 2 o 3 In the case of , a high Q value can b...

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Application Information

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IPC IPC(8): C04B35/50C04B35/468
CPCC04B35/50C04B35/468C04B2235/442C04B2235/3227C04B2235/3298C04B2235/96
Inventor 车漢率
Owner SUZHOU RF TOP ELECTRONICS COMM
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