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Temperature stable niobate microwave dielectric ceramic material, preparation method and application

A microwave dielectric ceramic, temperature-stable technology, applied in the field of ceramic materials, can solve the problems of reducing the Q value of the material, increasing the dielectric loss of the ceramic material, affecting the application range of the ceramic material, etc., achieving good performance, overcoming the high sintering temperature, rich The effect of temperature stability in the working environment

Active Publication Date: 2022-07-29
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in order to improve the temperature stability of ceramic materials, it is mainly to form a composite ceramic material by adding a compound that has an opposite resonant frequency temperature coefficient and does not chemically react with the matrix material, but this method will increase the ceramic material to a certain extent. Dielectric loss significantly reduces the Q value of the material and affects the application range of ceramic materials

Method used

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  • Temperature stable niobate microwave dielectric ceramic material, preparation method and application
  • Temperature stable niobate microwave dielectric ceramic material, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Preparation of Li 3 Mg 2 (NbO 6 ) calcined powder

[0028] According to Li 3 Mg 2 (NbO 6 ) in the stoichiometric ratio of 3.12 g of MgO with a purity of 99.99% and 4.291 g of Li with a purity of 99.99% 2 CO 3 and 5.145g Nb of 99.99% purity 2 O 5 , to get raw material 1. The raw material 1, agate balls and anhydrous ethanol were put into a nylon ball mill in a mass ratio of 1:2:2, mixed and milled for 8 hours, dried at 90°C for 12 hours, and then pre-fired at 1100°C for 4 hours. , prepared as Li 3 Mg 2 (NbO 6 ) calcined powder.

[0029] (2) Preparation of SrTiO 3 calcined powder

[0030] According to SrTiO 3 The stoichiometric ratio of 8.05g of SrCO with a purity of 99.95% was weighed 3 and 4.353g of 99.99% pure TiO 2 , to obtain raw material 2. The raw material 2, agate balls, and anhydrous ethanol were put into a nylon ball mill in a mass ratio of 1:2:2, mixed and milled for 8 hours, dried at 90°C for 12 hours, and then pre-fired at 1000°C for 4 ...

Embodiment 2

[0034] In step (3) of Example 1, the green body was sintered at 1000° C. for 4 hours, and other steps were the same as those of Example 1 to prepare a niobate microwave dielectric ceramic material.

Embodiment 3

[0036] In step (3) of Example 1, the green body was sintered at 1000° C. for 8 hours, and other steps were the same as those of Example 1 to prepare a niobate microwave dielectric ceramic material.

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Abstract

The invention discloses a temperature-stable niobate microwave dielectric ceramic material, a preparation method and an application. The preparation method of the ceramic material is as follows: S1: MgO, Li 2 CO 3 and Nb 2 O 5 After fully mixing with agate balls and anhydrous ethanol and ball milling for 8-10 hours, Li was prepared by drying and pre-firing. 3 Mg 2 (NbO 6 ) calcined powder; S2: carbonate and TiO 2 After fully mixing with agate balls and anhydrous ethanol and ball milling for 8-10 hours, the titanate calcined powder is obtained by drying and calcining; S3: Li in S1 3 Mg 2 (NbO 6 ) calcined powder, titanate calcined powder in S2, LiF and agate balls, absolute ethanol are fully mixed and ball-milled for 8-10h, dried, granulated, sieved, and compressed into cylindrical green bodies with a powder tablet machine , a temperature-stable niobate microwave dielectric ceramic material is prepared by sintering the green body. The invention significantly improves the temperature stability of the ceramic material, and enriches the demand of the current high-frequency communication electronic circuit technology for the low dielectric constant material with good temperature stability in the working environment and high Q value.

Description

technical field [0001] The invention relates to the technical field of ceramic materials, in particular to a temperature-stable niobate microwave dielectric ceramic material, a preparation method and an application. Background technique [0002] At present, in order to improve the temperature stability of ceramic materials, composite ceramic materials are mainly formed by adding a compound that has an opposite resonant frequency temperature coefficient and does not chemically react with the matrix material. The dielectric loss significantly reduces the Q value of the material and affects the application range of ceramic materials. Therefore, developing a new ceramic material with high Q value and high temperature stability is the technical problem to be solved by this application. SUMMARY OF THE INVENTION [0003] Based on the technical problems existing in the background technology, the present invention proposes a temperature-stable niobate microwave dielectric ceramic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/495C04B35/622
CPCC04B35/495C04B35/622C04B2235/3206C04B2235/3203C04B2235/3213C04B2235/3232C04B2235/445C04B2235/5427C04B2235/602C04B2235/656C04B2235/6567
Inventor 付志粉何莹杨忠意
Owner ANHUI UNIV OF SCI & TECH
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