Preparation method of teflon composite substrate material

A polytetrafluoroethylene and composite substrate technology, which is applied in the field of organic/inorganic composite materials, can solve the problems of water absorption data reporting and high water absorption of composite substrate materials, and achieve improved compatibility, improved dispersion uniformity, low dielectric The effect of electrical loss

Inactive Publication Date: 2018-09-25
UNIV OF ELECTRONICS SCI & TECH OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It uses PTFE dry powder as the raw material, and the aluminum nitride used has not been modified. As mentioned above, it is easy to cause the water absorption rate of the composite substrate material to be too high. The water absorption rate data is not reported in the article, and the water absorption rate is an item of the substrate material. Important Performance Indicators

Method used

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  • Preparation method of teflon composite substrate material
  • Preparation method of teflon composite substrate material
  • Preparation method of teflon composite substrate material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] a) Weigh 400g of aluminum nitride powder, put it into a high-temperature pre-sintering furnace, and simultaneously pass a mixed gas of dry oxygen and inert gas, and oxidize at 1000°C for 2h. Weigh 62.5g of deionized water and 237.5g of alcohol, then add glacial acetic acid to the mixed solution of deionized water and alcohol to adjust pH=4. Weigh 200g of aluminum nitride ceramic powder after heat treatment, weigh 2g of F8261 coupling agent, 1g of KH602 coupling agent, add aluminum nitride ceramic powder and coupling agent to the above deionized water and alcohol mixture, 55 ℃ Stir ultrasonically for 1.5h. The solid obtained by filtering the mixed solution was dried in an oven at 120° C. for 6 hours, and sieved with a 120-mesh standard sampling sieve to obtain a modified powder. (F8261: KH602: AlN=1:0.5:100)

[0048] b) Weigh the polytetrafluoroethylene emulsion according to the aluminum nitride ceramic powder weight ratio of 5.0%, and dilute the emulsion concentration...

Embodiment 2

[0052] a) Weigh 400g of aluminum nitride powder, put it into a high-temperature pre-sintering furnace, and simultaneously pass a mixed gas of dry oxygen and inert gas, and oxidize at 1000°C for 2h. Weigh 62.5g of deionized water and 237.5g of alcohol, then add glacial acetic acid to the mixed solution of deionized water and alcohol to adjust pH=4. Weigh 200g of aluminum nitride ceramic powder after heat treatment, weigh 2g of F8261 coupling agent, 0.6g of KH602 coupling agent, add aluminum nitride ceramic powder and coupling agent to the above-mentioned deionized water and alcohol mixture, 55 ℃ ultrasonic stirring for 1.5h. The solid obtained by filtering the mixed solution was dried in an oven at 120° C. for 6 hours, and sieved with a 120-mesh standard sampling sieve to obtain a modified powder. (F8261: KH602: AlN=1:0.3:100)

[0053] b) Weigh the polytetrafluoroethylene emulsion according to the aluminum nitride ceramic powder weight ratio of 5.0%, and dilute the emulsion c...

Embodiment 3

[0057] a) Weigh 400g of aluminum nitride powder, put it into a high-temperature pre-sintering furnace, and simultaneously pass a mixed gas of dry oxygen and inert gas, and oxidize at 1000°C for 2h. Weigh 62.5g of deionized water and 237.5g of alcohol, then add glacial acetic acid to the mixed solution of deionized water and alcohol to adjust pH=4. Weigh 200g of heat-treated aluminum nitride ceramic powder, weigh 2g of Z-6124 coupling agent, and 0.4g of KH602 coupling agent, and add aluminum nitride ceramic powder and coupling agent to the above deionized water and alcohol mixture , 55 ℃ ultrasonic stirring 1.5h. The solid obtained by filtering the mixed solution was dried in an oven at 120° C. for 6 hours, and sieved with a 120-mesh standard sampling sieve to obtain a modified powder. (Z-6124: KH602: AlN=1:0.2:100)

[0058] b) Weigh the polytetrafluoroethylene emulsion according to the aluminum nitride ceramic powder weight ratio of 5.0%, and dilute the emulsion concentratio...

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Abstract

The invention relates to a preparation method of a teflon composite substrate material and belongs to the field of organic/inorganic composite materials. The method includes the steps of firstly, oxidizing aluminum nitride ceramic powder at 800-1000 DEG C for 1-4 hours; secondly, adding the aluminum nitride ceramic powder into the mixed solution of deionized water and anhydrous ethanol, weighing acoupling agent, and evenly stirring and mixing in an ultrasonic manner to obtain a mixed material; thirdly, filtering the mixed material, and drying at 110-120 DEG C for 4-7 hours to obtain modifiedaluminum nitride ceramic powder; fourthly, placing the modified aluminum nitride ceramic powder into a powder processing cavity of 105-120 DEG C, and spraying a PTFE resin solution into the cavity ina high-pressure manner to obtain PTFE wrapped aluminum nitride powder; fifthly, adding a demulsifier to perform demulsification; sixthly, crushing; seventhly, performing cold press molding, and performing hot pressed sintering. The preparation method has the advantages that AIN powder is processed by a thermal oxidation process to oxidize the surface of the AIN powder to form a thin aluminum oxidelayer, and surface hydroxyl is beneficial to coupling agent grafting reaction.

Description

technical field [0001] The invention belongs to the field of organic / inorganic composite materials. Background technique [0002] Resin-based microwave composite substrate material is a type of composite material that uses polymer resin as the matrix and inorganic fillers as reinforcement materials. It has the characteristics of light weight, high strength, convenient processing and molding, chemical corrosion resistance and excellent dielectric properties, and is widely used. In aerospace, satellite communication, radar antenna, automotive electronics and other fields. With the development of circuit signal transmission to high frequency and high speed, in order to ensure the integrity of signal transmission, the composite substrate material is required to have a low dielectric constant (ε r ) and low dielectric loss (tanδ), thereby avoiding signal propagation delay and reducing signal attenuation. On the other hand, due to the integration and miniaturization of electroni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/18C08K9/10C08K9/06C08K9/00C08K3/28
CPCC08K3/28C08K9/00C08K9/06C08K9/10C08K2003/282C08K2201/003C08L27/18
Inventor 袁颖谭炳良迟志峰钟朝位张树人曾浩华
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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