Low-temperature co-fired microwave dielectric ceramic material and preparation method thereof and electronic component

A technology of microwave dielectric ceramics and low-temperature co-firing, which is applied to electrical components, waveguide devices, capacitors, etc., and can solve problems such as high sintering temperature, large energy consumption, and high dielectric constant

Active Publication Date: 2021-05-07
CHENZHOU GONGTIAN ELECTRONICS CERAMICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention aims at the deficiencies in the prior art, and its main purpose is to provide a low-temperature co-fired microwave dielectric ceramic material and its preparation method, electronic components, and microwave dielectric ceramic materials for the calcium magnesium silicate structure system, It can effectively solve the problems that the existing co-fired microwave dielectric ceramic materials and their preparation methods are not environmentally friendly, high sintering temperature, consume a lot of energy, not energy-saving, high dielectric constant, low Q value and temperature coefficient of resonance frequency greater than ±20PPm

Method used

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Examples

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preparation example Construction

[0024] The present invention also discloses a method for preparing a low-temperature co-fired microwave dielectric ceramic material, which includes the following steps:

[0025] (1) Put all the raw materials into the ball mill and mix them for 8 hours. The ball milling medium is φ5~φ15 zirconia balls. Material: balls: deionized water = 1:4:2. Uniform slurry.

[0026] (2) Put the slurry in step (1) through a 100-mesh sieve after spray drying, put it into a corundum crucible, and calcinate it at a constant temperature of 1150°C for 3-4h to synthesize.

[0027] (3) Add the calcined synthetic material to the ball mill according to the material: ball: deionized water = 1:4:2, and ball mill for 4-6 hours for the second time to obtain a uniform slurry with a particle size of 2-3 μm.

[0028] (4) Put the slurry in step (3) into the granulation tower through the screw pump for automatic spray granulation, and prepare uniform particles with a particle size of 100 mesh and spherical flu...

Embodiment 1

[0036] (1) Weigh the raw materials with the following mass percentages: calcium carbonate 49%; magnesium oxide 6%; titanium dioxide 7%; silicon dioxide 36.3%; manganese oxide 0.1%; lithium oxide 0.6%; bismuth oxide 1%.

[0037] (2) Put all the raw materials into the ball mill and mix them for 8 hours. The ball milling medium is zirconia balls of φ5~φ15. Material: balls: deionized water = 1:4:2. Uniform slurry.

[0038] (3) The slurry in step (2) was spray-dried, passed through a 100-mesh sieve, put into a corundum crucible, and calcined at a constant temperature of 1150°C for 4 hours to synthesize.

[0039] (4) Add the calcined synthetic material to the ball mill according to the material: ball: deionized water = 1:4:2, and ball mill for 5 hours twice to obtain a uniform slurry with a particle size of 2-3 μm.

[0040] (5) Put the slurry in step (4) into the granulation tower through the screw pump for automatic spray granulation, and prepare uniform particles with a particle ...

Embodiment 2

[0044] (1) Weigh the following raw materials in mass percentage: calcium carbonate 48.5%; magnesium oxide 6%; titanium dioxide 6.5%; silicon dioxide 36.38%; manganese oxide 0.12%; lithium oxide 0.5%; bismuth oxide 2%.

[0045](2) Put all the raw materials into the ball mill and mix them for 8 hours. The ball milling medium is zirconia balls of φ5~φ15. Material: balls: deionized water = 1:4:2. Uniform slurry.

[0046] (3) The slurry in step (2) was spray-dried, passed through a 100-mesh sieve, put into a corundum crucible, and calcined at a constant temperature of 1150°C for 4 hours to synthesize.

[0047] (4) Add the calcined synthetic material to the ball mill according to the material: ball: deionized water = 1:4:2, and ball mill for 6 hours twice to obtain a uniform slurry with a particle size of 2-3 μm.

[0048] (5) Put the slurry in step (4) into the granulation tower through the screw pump for automatic spray granulation, and prepare uniform particles with a particle si...

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Abstract

The invention relates to a low-temperature co-fired microwave dielectric ceramic material and a preparation method thereof and an electronic component. The low-temperature co-fired microwave dielectric ceramic material comprises the following raw materials in percentage by mass: 48-52% of calcium carbonate; 6%-8% of magnesium oxide; 6%-8% of titanium dioxide; 36%-38% of silicon dioxide; 0.1%-0.2% of manganese oxide; 0.5%-1% of lithium oxide; and 1%-3% of bismuth oxide. The co-fired microwave dielectric ceramic material sintered by the liquid-phase reaction procedures of burdening, primary ball milling, calcining, secondary ball milling, granulating, forming and bowl-filling sintering of the components is low in dielectric constant and high in quality factor Q value, and the temperature coefficient of resonance frequency is close to 0; secondly, manganese oxide can generate a liquid phase under the high-temperature condition, sintering is promoted, the sintering temperature is reduced, and energy consumption is reduced; in addition, the preparation method does not generate pollution in the preparation process.

Description

technical field [0001] The invention relates to the technology in the field of ceramic materials, in particular to a low-temperature co-fired microwave dielectric ceramic material, a preparation method thereof, and electronic components. Background technique [0002] At present, with the rapid development of my country's aerospace technology and satellite communications, multi-band fixed broadcast communication satellites, dedicated broadcast satellites, live broadcast satellites, mobile broadcast satellites, mobile communication satellites and dedicated GPS global positioning and safety navigation satellites will be formed. As well as the further increase in the demand for transmission bandwidth of data services dominated by IP services, the development and application of the longer wavelength L-band has increasingly become the focus of attention. At the same time, it also drives the demand for related microwave components such as corresponding microwave resonators, filters...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/22C04B35/622C04B35/64H01G4/12H01P1/20
CPCC04B35/22C04B35/622C04B35/64H01G4/1209H01P1/2002C04B2235/3206C04B2235/3232C04B2235/3203C04B2235/3262C04B2235/3298C04B2235/656C04B2235/6567Y02P20/10
Inventor 陈功田李秋均吴娟英肖练平何坚兵
Owner CHENZHOU GONGTIAN ELECTRONICS CERAMICS TECH
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