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High-performance composite dielectric filter, material thereof, and preparation method of material

A composite medium and high-performance technology, applied in the direction of waveguide devices, resonators, electrical components, etc., can solve the problems of low production efficiency, high production cost, cracking of components, etc., to reduce industrial energy consumption and production costs, improve Production efficiency, the effect of not easy to crack

Inactive Publication Date: 2021-06-15
CHENZHOU GONGTIAN ELECTRONICS CERAMICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 high-performance composite dielectric filter and its material and preparation method, which can effectively solve the problem of poor flexibility of existing polymer microwave dielectric ceramic materials. , the prepared components are prone to cracking due to heat, and the production system has problems of high industrial energy consumption, high production cost and low production efficiency

Method used

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  • High-performance composite dielectric filter, material thereof, and preparation method of material
  • High-performance composite dielectric filter, material thereof, and preparation method of material
  • High-performance composite dielectric filter, material thereof, and preparation method of material

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preparation example Construction

[0029] The invention discloses a preparation method of a high-performance composite dielectric filter material, which includes the following steps:

[0030] (1) Weighing: Take ceramic powder with a dielectric constant of 40-120, and its mass percentage is 40%-70%.

[0031] (2) Mixing: Mix ceramic powder, deionized water, and dispersant in a weight ratio of 1:1:0.005 to obtain a mixture. The type of dispersant is SF8.

[0032] (3) Ball milling: Pour the above mixture into a circulating stirring ball mill barrel with φ6mm grinding balls and grind for 8 hours, and the particle size of the slurry after grinding is less than 0.6 μm.

[0033] (4) Drying: Use a centrifugal spray drying tower with an induced air temperature of 100±5°C, a supply air temperature of 250±5°C, an atomizing disc rotation speed of 22Hz, and a feeding speed of 40Hz to dry the slurry to obtain powder.

[0034] (5) Pre-firing: Put the powder obtained in step (4) into an alumina crucible, circulate the tunnel k...

Embodiment 1

[0047] (1) Weighing: Take ceramic powder with a dielectric constant of 40, and its mass percentage is 45%.

[0048] (2) Mixing: Mix ceramic powder, deionized water, and dispersant in a weight ratio of 1:1:0.005 to obtain a mixture. The type of dispersant is SF8.

[0049] (3) Ball milling: Pour the above mixture into a circulating stirring ball mill barrel with φ6mm grinding balls and grind for 8 hours, and the particle size of the slurry after grinding is less than 0.6 μm.

[0050] (4) Drying: Use a centrifugal spray drying tower with an induced air temperature of 100°C, a supply air temperature of 250°C, an atomization disc rotation speed of 22Hz, and a feeding speed of 40Hz to dry the slurry to obtain powder.

[0051] (5) Pre-firing: Put the powder obtained in step (4) into an alumina crucible, circulate the tunnel kiln temperature at 1330°C, and work for 4 hours.

[0052] (6) Pulverization: The material obtained in step (5) is pulverized and passed through a 100-mesh sieve...

Embodiment 2

[0060] (1) Weighing: Take ceramic powder with a dielectric constant of 40-120, and its mass percentage is 43%.

[0061] (2) Mixing: Mix ceramic powder, deionized water, and dispersant in a weight ratio of 1:1:0.005 to obtain a mixture. The type of dispersant is SF8.

[0062] (3) Ball milling: Pour the above mixture into a circulating stirring ball mill barrel with φ6mm grinding balls and grind for 8 hours, and the particle size of the slurry after grinding is less than 0.6 μm.

[0063] (4) Drying: Use a centrifugal spray drying tower with an induced air temperature of 100°C, a supply air temperature of 250°C, an atomization disc rotation speed of 22Hz, and a feeding speed of 40Hz to dry the slurry to obtain powder.

[0064] (5) Pre-firing: Put the powder obtained in step (4) into an alumina crucible, circulate the tunnel kiln temperature at 1330°C, and work for 4 hours.

[0065] (6) Pulverization: The material obtained in step (5) is pulverized and passed through a 100-mesh s...

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Abstract

The invention discloses a high-performance composite dielectric filter, a material thereof, and a preparation method of the material. Ceramic powder, deionized water and a dispersing agent are mixed in proportion, and undergo the working procedures of ball milling, drying, pre-sintering, smashing, secondary grinding, drying, stirring, extrusion injection molding, baking, hot pressing and the like to prepare the high-performance composite dielectric filter material. The powder obtained after the first drying is subjected to 1330 DEG C high temperature pre-sintering, the high temperature sintering is not required during the subsequent preparation process, and the paraffin oil and the coupling agent only need to be volatilized at the temperature of 380 DEG C so as to reduce the industrial energy consumption and the production cost of the material production system, such that the production efficiency of the material production system is improved; and PTFE is added into the material obtained after secondary drying, so that the prepared high-performance composite dielectric filter material has relatively good flexibility, and a component prepared from the high-performance composite dielectric filter material is not prone to cracking in a use process.

Description

technical field [0001] The invention relates to the technology in the field of ceramic materials, in particular to a high-performance composite dielectric filter, a material, and a preparation method. Background technique [0002] Polymer microwave dielectric ceramic material is a new type of electronic functional ceramic material used as a medium in microwave and frequency band circuits. It has a low dielectric constant (ε r value ≈ 20), low loss (quality factor Q.f value > 40000), frequency temperature coefficient τ f Therefore, it can be made into components such as chip antennas, radar substrates, and resonator supports, which are widely used in technical fields such as 5G mobile communications, military radar, and satellite positioning and navigation systems. [0003] The existing polymer microwave dielectric ceramic materials have poor flexibility, and the components produced by them are prone to cracking due to heat during use. Moreover, since the sintering temper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P7/10C04B35/634C04B35/626C04B35/622
CPCH01P7/10C04B35/622C04B35/6261C04B35/62655C04B35/63436C04B35/63496
Inventor 陈功田肖练平何坚兵李秋均
Owner CHENZHOU GONGTIAN ELECTRONICS CERAMICS TECH
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