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Ceramic material and preparation method and application thereof

A technology of ceramic materials and microwave dielectric ceramics, which is applied in the formulation and preparation of new functional ceramic materials, can solve the problems of ceramic machinability requirements, cannot meet the requirements of 5G, etc., and achieves good machinability and wide sintering process window. Effect

Active Publication Date: 2021-01-22
GUANGDONG FENGHUA ADVANCED TECH HLDG
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  • Abstract
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Problems solved by technology

Usually the solution is to add CaTiO 3 material (temperature coefficient +800ppm / ℃) to modify the temperature characteristics, but due to CaTiO 3 The Qf value of the material is very low, only 3600, resulting in the overall Qf of the material being only 30000-40000, which cannot meet the requirements of 5G
In addition, 5G communication filters are mostly special-shaped parts, which are difficult to complete through one-piece molding. Usually, ceramic materials need to be machined after sintering, so the mechanical processing performance of ceramics is higher.

Method used

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  • Ceramic material and preparation method and application thereof
  • Ceramic material and preparation method and application thereof

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Embodiment 1

[0024] The chemical general formula of present embodiment ceramic material is: {Mg a Si b Ca c Ti d o (a+2b+c+2d)}(main crystal phase)-eMg 4 NbTaO 9 (Auxiliary material)-fAl 2 o 3 -gR x O(R x O is for La 2 o 3 , CeO 2 , MnO 2 One of them), take a=2.00, b=1, c=0.2, d=0.2, e=0.05, f=0.05, g=0.01.

[0025] The preparation process of the microwave dielectric ceramic material in this embodiment is as follows:

[0026] (1) Main crystal phase Mg a Si b Ca cTi d o (a+2b+c+2d) Preparation: select raw materials MgO and SiO with a purity of 99.8% 2 , CaCO 3 、TiO 2 , according to the stoichiometric ratio of the main crystal phase, that is, select a=2.00, b=1.0, c=0.20, d=0.20, first calculate the quality of the main crystal phase raw materials required; put the accurately weighed raw materials into the ball mill jar Inside; add pure water and zirconia grinding balls, the weight ratio of the three is: material: ball: pure water = 1:4:1.5; ball mill for 4 hours, mix ev...

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Abstract

The invention discloses a ceramic material. According to the invention, MgaSibCacTidO(a+2b+c+2d) is used as a basic formula, and Mg4NbTaO9-Al2O3 and the like are compositely doped, so that the obtained low-dielectric-constant microwave ceramic material has the following properties: the relative dielectric constant is 8-10, the Qf is 80000-100000, the temperature coefficient of resonance frequencyis 0+ / -10ppm / DEG C, a wide sintering process window and good machinability are achieved. Meanwhile, the invention also discloses a preparation method of the ceramic material.

Description

technical field [0001] The invention belongs to the field of science and technology of special ceramic materials, and specifically relates to a formula of a novel functional ceramic material and its preparation method and application. Background technique [0002] With the rapid development of communication technology, dielectric ceramics, which are important parts of resonators and filters in the whole system, have received extensive research and attention. Microwave dielectric ceramic is a new type of functional electronic ceramic, which has the characteristics of high dielectric constant, low loss, and small frequency temperature coefficient. This microwave ceramic material can be used to make dielectric resonators, duplexers, dielectric filters and other devices. Widely used in many fields such as mobile communication base stations, repeaters, radars, satellite positioning and navigation systems, etc., to meet the needs of high-performance indicators such as miniaturizat...

Claims

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Application Information

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IPC IPC(8): C04B35/20C04B35/64
CPCC04B35/20C04B35/64C04B2235/3208C04B2235/3232C04B2235/3251C04B2235/3255C04B2235/3217C04B2235/3227
Inventor 曹英宋永生吴海斌郭化雷
Owner GUANGDONG FENGHUA ADVANCED TECH HLDG
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