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Low-sintering microwave dielectric ceramic material and preparation method thereof

A microwave dielectric ceramic, low-firing technology, applied in the field of microwave dielectric materials, can solve the problems of high cost and large process energy consumption, and achieve the effect of good low-temperature sinterability

Active Publication Date: 2020-06-23
SHANDONG SINOCERA FUNCTIONAL MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the performance of the capacitor can meet the requirements, in view of the fact that the selected microwave dielectric material needs to be sintered and manufactured in a medium and high temperature system, the entire process consumes a lot of energy, which in turn affects the cost.

Method used

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  • Low-sintering microwave dielectric ceramic material and preparation method thereof
  • Low-sintering microwave dielectric ceramic material and preparation method thereof
  • Low-sintering microwave dielectric ceramic material and preparation method thereof

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experiment example

[0033] The above-mentioned granulated materials were subjected to dry pressing, and the pressed green bodies were respectively heat-preserved and calcined for 3 hours, and the sintering temperature at which the green bodies of each material could be formed was recorded.

[0034] Perform performance tests on the microwave dielectric ceramic materials prepared in the above-mentioned Examples 1-5 and Comparative Examples 1-4, specifically including the dielectric constant of the material, the f*Q value at 25°C, and the frequency temperature coefficient τf;

[0035] The dielectric constant and the f*Q value at 25°C can be obtained by methods known in the prior art;

[0036] The frequency temperature coefficient τf means that it has good temperature characteristics. It is calculated by testing the resonant frequency f at -40°C, 25°C, and 110°C respectively, and is calculated according to the following formula:

[0037] τf=[(f 110℃ -f -40℃ ) / f 25℃ ] / 150*10 6 (ppm / °C).

[0038] ...

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Abstract

The invention belongs to the technical field of microwave dielectric materials, and particularly relates to a BaZrO3 system low-temperature sintering low-dielectric-constant C0G microwave dielectric material and a preparation method thereof. The invention relates to the low-sintering microwave dielectric ceramic material, the material is prepared by doping a modifying additive and a sintering aidwith selected components and proportions, the dielectric constant of the obtained microwave dielectric ceramic material can reach 12-16, the Q*f value is 30000-50000, especially the sintering temperature of the material can reach 950 DEG C or below, TCC of the microwave dielectric ceramic material meets the C0G specification, and the microwave dielectric ceramic material has good low-temperature sintering performance and can be used for manufacturing microwave devices such as MLCC and microwave antennas.

Description

technical field [0001] The invention belongs to the technical field of microwave dielectric materials, and in particular relates to a BaZrO3 system low-permittivity COG microwave dielectric material sintered at low temperature and a preparation method thereof. Background technique [0002] Microwave dielectric ceramics are used in microwave frequency bands (mainly UHF, SHF frequency bands, [0003] 300MHz-300GHz) as a dielectric material in the circuit and complete one or more functions of ceramics, which has excellent properties such as high dielectric constant, low dielectric loss, low temperature coefficient of resonance frequency, etc., is a resonator, filter, duplex It can be widely used in many fields such as personal portable mobile phones, microwave base stations, car phones, satellite communications, and military radars. Especially in recent years, with the rapid development of communication technology, the demand for microwave devices is also increasing. In partic...

Claims

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Application Information

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IPC IPC(8): C04B35/48C04B35/622C04B35/64C03C12/00C03C6/04
CPCC04B35/48C04B35/622C04B35/64C03C12/00C03C1/00C04B2235/3215C04B2235/3445C04B2235/3262C04B2235/3217C04B2235/3275C04B2235/3232C04B2235/3208C04B2235/365C04B2235/656C04B2235/6567C04B2235/96
Inventor 付清波应红杨彬杨月霞
Owner SHANDONG SINOCERA FUNCTIONAL MATERIAL CO LTD
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