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A kind of metal compound and microwave dielectric ceramic and preparation method thereof

A technology of microwave dielectric ceramics and metal compounds, applied in the field of microwave dielectric ceramics, can solve the problems of volatile components, product performance deterioration, high manufacturing cost, etc., and achieve the effects of low sintering temperature, low manufacturing cost and high Qf value

Active Publication Date: 2022-05-03
GUANGDONG GOVA ADVANCED MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the preparation of microwave dielectric ceramic materials, Ba(Zn 1 / 3 Nb 2 / 3 )O 3 system, Ba(Co 1 / 3 Nb 2 / 3 )O 3 system and Ba[(Zn,Co) 1 / 3 Nb 2 / 3 ]O 3 The system is a better candidate system due to the high Qf value of the prepared microwave dielectric ceramic material, but the components of these systems are volatile during the preparation process, which leads to the deterioration of the product performance, and requires a long time of high-temperature annealing to ensure product performance. High, these shortcomings limit its large-scale commercial use

Method used

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  • A kind of metal compound and microwave dielectric ceramic and preparation method thereof
  • A kind of metal compound and microwave dielectric ceramic and preparation method thereof
  • A kind of metal compound and microwave dielectric ceramic and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0039] 1. Weigh 126.191g BaCO 3 , 5.182g ZnO, 11.935g Co 3 o 4 and 56.692g Nb 2 o 5 , the weighed above-mentioned raw materials, zirconium balls and deionized water were wet ball-milled with a planetary mill for 4 hours at a mass ratio of 1:3:2, dried at 120°C, and pre-fired at 1050°C for 3 hours (in the atmosphere atmosphere), the heating rate is 3°C / min, and then cooled with the furnace to obtain pre-fired material;

[0040] 2. The pre-sintered material, zirconium balls and deionized water are used in a mass ratio of 1:3:2, and the planetary wet ball mill is used for 4 hours, and dried at 120 ° C to obtain microwave dielectric ceramic powder;

[0041] 3. Add a binder with 20% of the mass of the powder to the microwave dielectric ceramic powder, granulate and grind for 1 hour, pass through an 80-mesh sieve, and press the powder into a thin film with a thickness of 6mm and a diameter of 13mm under a pressure of 100MPa. The cylindrical green body is sintered into porcelain...

Embodiment 2

[0047] 1. Weigh 126.215g BaCO 3 , 5.158g ZnO, 11.89g Co 3 o 4 and 56.736 g Nb 2 o 5 , the weighed above-mentioned raw materials, zirconium balls and deionized water were wet ball-milled with a planetary mill for 4 hours at a mass ratio of 1:3:2, dried at 120°C, and pre-fired at 1050°C for 3 hours (in the atmosphere atmosphere), the heating rate is 3°C / min, and then cooled with the furnace to obtain pre-fired material;

[0048] 2. The pre-sintered material, zirconium balls and deionized water are used in a mass ratio of 1:3:2, and the planetary wet ball mill is used for 4 hours, and dried at 120 ° C to obtain microwave dielectric ceramic powder;

[0049] 3. Add a binder with 20% of the mass of the powder to the microwave dielectric ceramic powder, granulate and grind for 1 hour, pass through an 80-mesh sieve, and press the powder into a thin film with a thickness of 6mm and a diameter of 13mm under a pressure of 100MPa. The cylindrical green body is sintered into porcelain...

Embodiment 3

[0059] Preparation of additives: MgO, Nb 2 o 5 , ZnO and Yb 2 o 3 According to the molar ratio of 4:1:0.05:0.03, the above-mentioned raw materials, zirconium balls and deionized water were weighed in a mass ratio of 1:3:2, ball milled for 24 hours, dried at 80°C, and pre-calcined at 1100°C 3h, the additive was obtained.

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Abstract

This application belongs to the technical field of microwave dielectric ceramics. The application provides a metal compound, a microwave dielectric ceramic and a preparation method thereof, and the microwave dielectric ceramic of the application includes a metal compound having the following general structure: (1-y)Ba 3 Zn x co 1‑x Nb 2 o 9 ‑yBa 8 CoNb 6 o 24 , where, x=0~1, y=0~0.1, by introducing Ba 8 CoNb 6 o 24 The new phase of non-stoichiometric ratio can be sintered in the liquid phase, which inhibits the volatilization of components, so that the prepared microwave dielectric ceramic has a stable B-site 1:2 long-range ordered structure and improves the Qf value. The microwave dielectric ceramic dielectric constant of this application is between 32.8 and 40.2, Q×f>56500GHz, up to 124300GHz, has the advantages of high Qf value and low dielectric loss, and the temperature coefficient of resonance frequency is -10.6PPM / ℃~ Continuously adjustable between +28.3PPM / ℃. The preparation method of the present application is simple, the manufacturing cost is low, meets the requirements of environmental protection, is non-toxic, and has no pollution to the environment; the sintering temperature is low, and the performance of the product can be guaranteed without long-term annealing, and the performance of the prepared product can be avoided due to volatilization of components. deterioration.

Description

technical field [0001] The application belongs to the technical field of microwave dielectric ceramics, and in particular relates to a metal compound, microwave dielectric ceramics and a preparation method thereof. Background technique [0002] With the continuous development of modern communication technology, mobile operators will face the challenges brought by the converged networking of 2G networks such as GSM and CDMA, 3G networks such as WCDMA, CDMA2000 and TD-SCDMA, and 4G networks such as TD-LTE and FDD-LTE. different formats. Due to the serious interference between adjacent frequency bands, the interference in the frequency band between 1.7GHz and 2.7GHz is particularly obvious, which puts forward higher requirements for the Qf value of microwave dielectric ceramic materials used in dielectric filters. In this frequency band, microwave dielectric ceramic materials with a dielectric constant of about 35 have attracted widespread attention because of the moderate siz...

Claims

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Application Information

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IPC IPC(8): C04B35/495C04B35/622
CPCC04B35/495C04B35/622C04B2235/3215C04B2235/3277C04B2235/3284C04B2235/3206C04B2235/3224
Inventor 殷旺凌海强曹顺顺马才兵
Owner GUANGDONG GOVA ADVANCED MATERIAL TECH
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