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PTFE (polytetrafluoroethylene)-based ceramic composite with near-zero dielectric constant temperature coefficient and preparation method of ceramic composite

A polytetrafluoroethylene based ceramic and polytetrafluoroethylene technology, which is applied in the field of polytetrafluoroethylene based ceramic composite materials and their preparation, can solve the problem of unspecified substrate dielectric constant temperature coefficient, high water absorption rate and dielectric loss and other problems, to achieve the effect of optimizing the molding process, improving performance, and simple and efficient process flow

Active Publication Date: 2019-03-08
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its copper-clad laminate has high water absorption and dielectric loss. At the same time, the patent does not give the temperature coefficient of the dielectric constant of the substrate.

Method used

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  • PTFE (polytetrafluoroethylene)-based ceramic composite with near-zero dielectric constant temperature coefficient and preparation method of ceramic composite
  • PTFE (polytetrafluoroethylene)-based ceramic composite with near-zero dielectric constant temperature coefficient and preparation method of ceramic composite
  • PTFE (polytetrafluoroethylene)-based ceramic composite with near-zero dielectric constant temperature coefficient and preparation method of ceramic composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] This embodiment provides a method for preparing a polytetrafluoroethylene-based ceramic composite material, the specific steps of which are as follows:

[0064] (1) Weigh 100gBaZn 0.4 Ti 4 o 9.4 For ceramic powder, dry the ceramic powder in an oven at 120°C for 10 hours to remove the physically adsorbed water; then configure a mixture of hydrogen peroxide and 150ml of concentrated brine in a three-necked reflux flask, where V (hydrogen peroxide): V (concentrated brine)=30:70, then add the ceramic powder into the mixed solution and boil at 60°C, while stirring for 1.5 hours to activate and increase the effect of hydroxyl groups on the surface of the ceramic powder; finally filter the ceramic powder, And the product obtained by suction filtration was dried at 120°C for 18 hours in a vacuum environment to obtain an activated ceramic powder;

[0065] (2) Weigh 2g coupling agent, 43g deionized water and 77g dehydrated ethanol, then mix deionized water and dehydrated ethan...

Embodiment 2

[0072] This embodiment provides a method for preparing a polytetrafluoroethylene-based ceramic composite material, the specific steps of which are as follows:

[0073] (1) Weigh 200gBaZn 0.4 Ti 4 o 9.4 Ceramic powder, dry the ceramic powder in an oven at 120°C for 10 hours to remove the physically adsorbed water; then configure a mixture of hydrogen peroxide and concentrated brine 300ml in a three-necked reflux flask, where V (hydrogen peroxide): V (concentrated brine)=30:70, then add the ceramic powder into the mixed solution and boil at 60°C, while stirring for 1.5 hours to activate and increase the effect of hydroxyl groups on the surface of the ceramic powder; finally filter the ceramic powder, And the product obtained by suction filtration was dried at 120°C for 18 hours in a vacuum environment to obtain an activated ceramic powder;

[0074] (2) Weigh 4g coupling agent, 86g deionized water and 154g dehydrated ethanol, then mix deionized water and dehydrated ethanol and...

Embodiment 3

[0080] This embodiment provides a method for preparing a polytetrafluoroethylene-based ceramic composite material, the specific steps of which are as follows:

[0081] (1) Weigh 150gBaZn 0.4 Ti 4 o 9.4 For ceramic powder, dry the ceramic powder in an oven at 120°C for 10 hours to remove the physically adsorbed water; then configure a mixture of hydrogen peroxide and 250ml of concentrated brine in a three-necked reflux flask, where V (hydrogen peroxide): V (concentrated brine)=30:70, then add the ceramic powder into the mixed solution and boil at 60°C, while stirring for 1.5 hours to activate and increase the effect of hydroxyl groups on the surface of the ceramic powder; finally filter the ceramic powder, And the product obtained by suction filtration was dried at 120°C for 18 hours in a vacuum environment to obtain an activated ceramic powder;

[0082] (2) Weigh 3g coupling agent, 64g deionized water and 116g dehydrated ethanol, then mix deionized water and dehydrated etha...

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Abstract

The invention discloses a PTFE (polytetrafluoroethylene)-based ceramic composite with near-zero dielectric constant temperature coefficient and a preparation method of the ceramic composite, and belongs to the technical field of PTFE-based ceramic composites. Ceramic powder with near-zero and positive dielectric constant temperature coefficient and glass fiber are selected as inorganic filler, andsubjected to surface modification, so that the surfaces of the ceramic powder and the glass fiber are grafted with -C-F2-chemical chain with structure similar to that of PTFE, PTFE is demulsified inthe ball milling process with a ball milling composite process, the ceramic powder and the glass fiber can be evenly distributed in PTFE by ball milling movement, and the composite with excellent performance is obtained. The process is reasonable, the filler mixing process is simple, the inorganic filler is uniformly dispersed in PTFE, and various properties of the PTFE microwave composite substrate material filled with the ceramic powder are greatly improved. The preparation process is greatly simplified while stable performance of the composite substrate material is guaranteed, and mass production can be met.

Description

technical field [0001] The invention belongs to the technical field of polytetrafluoroethylene-based ceramic composite materials, and in particular relates to a polytetrafluoroethylene-based ceramic composite material with near-zero dielectric constant temperature coefficient and a preparation method thereof. Background technique [0002] With people's demand for high speed, wide bandwidth and high frequency of information transmission system, the substrate materials of traditional bearer communication system can no longer meet the needs of various aspects. As the frequency of using microwaves increases, the transmission loss and heat generation of the entire communication system will deteriorate, resulting in more and more serious signal delays, which will eventually affect the stability and reliability of the entire system. At the same time, microwave devices also need to meet the application requirements of various extreme environments, such as: high temperature, low temp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/08C04B20/10
CPCC04B20/1051C04B26/08C04B18/023C04B14/42
Inventor 唐斌罗福川袁颖钟朝位张树人
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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