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A kind of dielectric ceramic material and preparation method thereof

A technology of dielectric ceramics and ceramic powders, which is applied in the field of ceramic materials, can solve the problems of damaging the dielectric properties of alumina dielectric ceramic materials and reducing the Q value of alumina dielectric ceramic quality factors, achieving high compactness, high Q value, The effect of reducing industrial energy consumption and production costs

Active Publication Date: 2022-04-19
ANHUI TATFOOK TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the long-term research and development process, the inventors of the present application found that adding a large amount of low-melting glass phase would damage the dielectric properties of the alumina dielectric ceramic material, reducing the Q value of the alumina dielectric ceramic quality factor

Method used

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  • A kind of dielectric ceramic material and preparation method thereof
  • A kind of dielectric ceramic material and preparation method thereof
  • A kind of dielectric ceramic material and preparation method thereof

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preparation example Construction

[0044] see figure 2 , figure 2 It is a schematic flow chart of an embodiment of the method for preparing a dielectric ceramic material of the present invention. The preparation method of the dielectric ceramic material of an embodiment provided by the present invention, the preparation method comprises:

[0045] Step S101, adding ball milling medium, deionized water and dispersant to the starting raw materials of analytically pure alumina with a purity of 99.9% or more in the α crystal phase and sintering aids, and mechanically mixing in a planetary ball mill, and the mixing is completed Afterwards, drying treatment is carried out to obtain a mixed powder.

[0046] The molecular formula is Al 2 o 3 —xMO, wherein, MO represents a sintering aid, and the sintering aid is selected from at least one of analytically pure boron oxide, analytically pure silicon dioxide, analytically pure magnesium oxide, and analytically pure zinc oxide, and the analytically pure alumina and the...

Embodiment 1

[0072] The starting materials in Example 1 are proportioned according to the molecular formula Al2O3—xMO, wherein MO represents one of B2O3, SiO2, MgO, and ZnO, and the molar ratio of analytically pure alumina to sintering aid is 1:x, where x is The value range is 0.01 to 0.1. The mixed material of analytically pure alumina with a purity of 99.9% alpha crystal phase and analytically pure boron oxide, analytically pure silicon dioxide, analytically pure magnesium oxide or analytically pure zinc oxide is used as a starting material, and is realized through the following process steps.

[0073] 1) Using a mixture of analytically pure alumina with a purity of 99.9% α crystal phase and analytically pure boron oxide, analytically pure silicon dioxide, analytically pure magnesium oxide or analytically pure zinc oxide as the starting material, the above starting material Weigh it according to a certain molar ratio and place it in a polyurethane ball mill jar, add a certain amount of z...

Embodiment 2

[0085] The starting raw material of embodiment 2 carries out proportioning according to molecular formula Al2O3—0.07{SiO2—(1-y)ZnO—yMgO}, wherein analytically pure alumina, analytically pure silicon dioxide, analytically pure zinc oxide and analytically pure magnesium oxide The molar ratio is 1:0.07:0.07(1-y):0.07y, wherein the range of y is 0-1. The mixed material of analytically pure alumina, analytically pure silicon dioxide, analytically pure magnesium oxide or / and analytically pure zinc oxide with a purity of 99.9% in alpha crystal phase is used as a starting material, and is realized through the following process steps.

[0086] 1) Using a mixture of analytically pure alumina, analytically pure silicon dioxide, analytically pure magnesium oxide or / and analytically pure zinc oxide with a purity of 99.9% of the α crystal phase as the starting material, the above-mentioned starting materials are mixed in a certain molar ratio Weigh it and place it in a polyurethane ball mil...

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Abstract

A dielectric ceramic material and its preparation method, adding ball milling media, deionized water and dispersant to the starting raw materials of analytically pure α-alumina with a purity of more than 99.9% and sintering aids, and mechanically performing the process in a planetary ball mill Mix and dry to obtain a mixed powder, wherein the mass ratio of the starting material, ball milling medium and deionized water is 1:4:1.1 to 1.3, the ball milling time is 4 hours, the diameter of the ball milling medium is 2 to 3 mm, and the dispersant The mass percentage content in the dielectric ceramic material is 3 / 1000 to 6 / 1000; the mixed powder is placed in a nano-scale circulating sander for grinding and dispersing treatment to obtain a ceramic powder; the ceramic powder is heated and sintered, Then a dielectric ceramic material is obtained.

Description

technical field [0001] The invention relates to the technical field of ceramic materials, in particular to a dielectric ceramic material and a preparation method thereof. Background technique [0002] Alumina dielectric ceramic is a new type of electronic functional ceramic used as a dielectric in microwave and frequency band circuits. It has high physical strength (bending strength > 300MPa), low dielectric constant (εr value ≈ 9), and low loss (quality Factor Q value>100000), frequency temperature coefficient τf is small, etc. Therefore, it can be made into chip antennas, radar substrates, resonator supports and other components, which are widely used in mobile communication, military radar, satellite positioning and navigation systems and other technologies field. However, the sintering temperature of this ceramic material is usually higher than 1700°C, and the quality factor Q value is generally not high due to the microscopic defects generated during the sinterin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/10C04B35/64
CPCC04B35/10C04B35/64C04B2235/3284C04B2235/3418C04B2235/3409C04B2235/3206C04B2235/96
Inventor 袁亮亮陆正武曾俊
Owner ANHUI TATFOOK TECH CO LTD
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