Preparation method of high-dielectric and low-loss composite material with laminated structure

A composite material and lamination technology, applied in chemical instruments and methods, lamination, layered products, etc., can solve the problems of reducing the capacitance and dielectric constant of laminated materials, and achieve strong applicability and practicability. The method is easy and the effect of increasing the dielectric constant

Active Publication Date: 2016-12-14
OCEAN UNIV OF CHINA
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  • Abstract
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  • Application Information

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Problems solved by technology

The current laminated high dielectric materials are all obtained by stacking positive dielectric materials with different dielectric properties, and the series connection of positive dielectric layers will lead to a decrease in the capacitance and dielectric constant of the entire laminated material

Method used

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  • Preparation method of high-dielectric and low-loss composite material with laminated structure
  • Preparation method of high-dielectric and low-loss composite material with laminated structure
  • Preparation method of high-dielectric and low-loss composite material with laminated structure

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Embodiment 1

[0044] The present invention, the preparation method of composite material, specifically comprises the following steps:

[0045](1) Mix PVDF powder and graphite powder in proportion, add absolute ethanol to ball mill for 30 minutes, fully dry at 70°C, and grind in a mortar for 10 minutes. In the mixed raw materials of PVDF powder and graphite powder, the volume fraction of graphite is respectively: 0vol %-46vol% (specific composition points are 0vol%, 1.7vol%, 3.4vol%, 5.2vol%, 6.9vol%, 8.6vol%, 13.1vol%, 14.9vol%, 20.3vol%, 23.0vol%, 25.8vol% %, 29.6vol%, 31.4vol%, 36.2vol%, 46.0vol%);

[0046] (2) Single-layer sample hot-press molding: pour the powder obtained in step (1) into the mold, apply a pressure of 5-10MPa to discharge the air and release the pressure, heat to a temperature of 184°C, press at a pressure of 10MPa for 5min, and maintain Under pressure conditions, after the mold is cooled to below the thermal deformation temperature of PVDF, a single-layer sample is ob...

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Abstract

The invention discloses a preparation method of a high-dielectric and low-loss composite material with a laminated structure, and relates to the technical field of composite material preparation. A positive dielectric material and a negative dielectric material are adopted as raw materials and are subjected to hot-pressing lamination to obtain the composite material. The positive dielectric material and the negative dielectric material are subjected to lamination, and the thicknesses and values of the positive and negative dielectric materials are matched, so that the dielectric constant is improved. The obtained composite material can obtain the remarkably-improved dielectric constant while the 10<-2> order of magnitudes and low losses are kept.

Description

technical field [0001] The invention relates to the technical field of composite material preparation, in particular to a preparation method of a high dielectric and low loss composite material with a laminated structure. Background technique [0002] High dielectric composite materials are widely used in organic field effect transistors, sensor devices, antennas and energy storage devices. Because polymer materials have the advantages of low dielectric loss, high breakdown field strength, good flexibility, and easy processing and molding, currently high-dielectric composite materials are mainly obtained by adding high-dielectric ceramic phases or conductive phases to the polymer matrix. . Although the dielectric constant can be increased by adding a high-dielectric ceramic phase to the polymer matrix, only when the content of the ceramic phase is very high, the dielectric constant can be significantly improved, which leads to a significant decline in the mechanical propert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B37/10B32B37/06
CPCB32B37/06B32B37/10
Inventor 史志成王婧毛凡
Owner OCEAN UNIV OF CHINA
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