Microwave ceramic dielectric filter and processing forming method thereof

A technology of dielectric filter and microwave ceramics, applied in the field of communication, can solve the problems of inconsistent dimensional shrinkage, uneven density of green body, complex shape, etc. in dry pressing, and achieve the effects of superior performance, excellent mechanical properties, and small sintering deformation.

Pending Publication Date: 2020-07-17
SHENZHEN SUNLORD ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a method for processing microwave ceramic dielectric filters, which solves the problem of inconsistent size shrinkage of microwave ceramic dielectric filters during dry pressing, inability to form complex shapes, and uneven density of green bodies, etc. question

Method used

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  • Microwave ceramic dielectric filter and processing forming method thereof
  • Microwave ceramic dielectric filter and processing forming method thereof
  • Microwave ceramic dielectric filter and processing forming method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0059] A microwave ceramic dielectric filter, comprising a ceramic dielectric body and a metal layer attached to the surface of the ceramic dielectric body, the feeding material for preparing the ceramic dielectric body includes 24kg of microwave ceramic powder, 4.2kg of polyoxymethylene, 0.9kg of polypropylene, and 0.6kg of paraffin wax. kg, dioctyl phthalate 0.012kg, oleic acid 0.06kg, silicone oil 0.06kg;

[0060] Its preparation method is as follows:

[0061]Mixing and granulation steps: put the ceramic forming agent in the internal mixer to preheat and melt, the mixing temperature is 165°C, the speed is 5r / min, add microwave ceramic powder for kneading, the kneading temperature is 185°C, and the speed is 5r / min. 25r / min, knead and mix evenly to form a milky white mud mass, and then use a granulator to granulate to obtain microwave ceramic feed;

[0062] Injection molding steps: put the above-mentioned microwave ceramic feed into an injection molding machine, and inject a...

Embodiment 2

[0072] A microwave ceramic dielectric filter, comprising a ceramic dielectric body and a metal layer attached to the surface of the ceramic dielectric body, the feed material for preparing the ceramic dielectric body includes 24.6kg of microwave ceramic powder, 3.51kg of polyoxymethylene, and 1.08kg of low-density polyethylene , paraffin 0.54kg, dioctyl phthalate 0.108kg, oleic acid 0.081kg, sorbitan monostearate 0.054kg, polyamide 0.027kg;

[0073] Its preparation method is as follows:

[0074] Microwave ceramic powder pretreatment: dry the microwave ceramic powder at 500°C for 2 hours, and keep it warm at 150°C;

[0075] Mixing and banburying granulation steps: After mixing the ceramic forming agent and microwave ceramic powder evenly, put it in the internal mixer for preheating and melting. The preheating temperature is 165°C and the speed is 5r / min. Kneading, the kneading temperature is 180°C, the speed is 25r / min, kneading and mixing evenly to form a milky white muddy ma...

Embodiment 3

[0082] A microwave ceramic dielectric filter, comprising a ceramic dielectric body and a metal layer attached to the surface of the ceramic dielectric body, the feed material for preparing the ceramic dielectric body includes 24kg of microwave ceramic powder, 4.2kg of polyaldehyde base, 0.9kg of polypropylene, paraffin wax 0.6kg, dioctyl phthalate 0.012kg, oleic acid 0.06kg, silicone oil 0.06kg;

[0083] Its preparation method is as follows:

[0084] Mixing and granulation steps: put the ceramic forming agent in the internal mixer to preheat and melt, the mixing temperature is 165°C, the speed is 5r / min, add microwave ceramic powder for kneading, the kneading temperature is 185°C, and the speed is 5r / min. 25r / min, knead and mix evenly to form a milky white mud mass, and then use a granulator to granulate to obtain microwave ceramic feed;

[0085] Injection molding steps: put the above-mentioned microwave ceramic feed into an injection molding machine, and inject and mold a ce...

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Abstract

The invention discloses a processing and forming method of a microwave ceramic dielectric filter and the microwave ceramic dielectric filter prepared by the method. The microwave ceramic dielectric filter comprises a ceramic dielectric body and a metal layer attached to the surface of the ceramic dielectric body, wherein the ceramic dielectric body is formed by mixing microwave ceramic powder witha ceramic forming agent at least containing a binder and then carrying out injection molding. The problems of inconsistent dry-pressing molding size shrinkage, local dielectric constant difference, incapability of molding complex shapes, non-uniform green body density and the like of the microwave ceramic dielectric filter can be solved.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method for processing and forming a microwave ceramic dielectric filter. Background technique [0002] Filter is an important device in the field of microwave communication. Its main function is to suppress unwanted signals and allow required signals to pass through smoothly. Microwave dielectric ceramics are a new type of functional ceramic powder developed in the past twenty years. It refers to ceramic powder used in microwave frequency (mainly 300MHz ~ 30GHz frequency band) circuits as dielectric powder and completes one or more functions. It is the key powder for manufacturing microwave dielectric filters and resonators. It has excellent properties such as high dielectric constant, low dielectric loss, and small temperature coefficient. It is suitable for manufacturing various microwave components and can meet the requirements of miniaturization, integration, high re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622C04B35/626C04B35/632C04B35/634C04B35/638C04B41/88H01P1/20
CPCC04B35/622C04B35/62695C04B35/632C04B35/63408C04B35/63472C04B35/63496C04B35/638C04B41/88C04B41/51H01P1/2002C04B2235/6022C04B2235/6562C04B2235/6567C04B2235/77C04B2235/661C04B2235/96
Inventor 蒋金瑞伍隽庞新锋蒋匆聪
Owner SHENZHEN SUNLORD ELECTRONICS
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