Ceramic-polymer composite material with high dielectric constant and preparation method thereof

Abstract

The invention discloses a ceramic / polymer composite with a high dielectric constant and a preparation method thereof. The preparation method comprises the following steps: step 1, dissolving a silane coupling agent in a first solvent to prepare a first solution; step 2, mixing ceramic powder with the first solution to prepare a suspension liquid; step 3, dissolving a polymer material in a second solvent to prepare a second solution; step 4, mixing the suspension liquid with the second solution to prepare ceramic / polymer composite slurry; step 5, after preparing the ceramic / polymer composite slurry into solid thin films, modifying the solid thin films by using a heat treatment method; step 6, pressing the sides together, with larger polymer densities, of the two solid thin films to prepare a multilayered composite. According to the ceramic / polymer composite obtained through the preparation method, the microstructure is more uniform, the dielectric constant is greatly increased, the dielectric loss is reduced, and the dielectric property is more excellent; the preparation method can be widely used in the field of preparation of composites.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a high dielectric constant ceramic-polymer composite material and a preparation method thereof. Background technique [0002] In the prior art, the method of making ceramic-polymer generally adopts the method of directly combining the coupling agent and the ceramic powder and then adding the polymer material, but the direct combination of the coupling agent and the ceramic powder has obvious defects, when the coupling agent When the amount is too large, the dielectric loss of the material is likely to increase; when the amount of coupling agent is too small, if it is directly mixed with ceramic powder, it is easy to agglomerate with only a small amount of ceramic powder, which is not conducive to the dispersion of ceramic powder. In addition, the microstructure of the ceramic-polymer produced by the current method is not uniform, resulting in a low dielectric constant and poor ...

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Problems solved by technology

[0002] In the prior art, the method of making ceramic-polymer generally adopts the method of directly combining the coupling agent and the ceramic powder and then adding the polymer material, but the direct combination of the coupling agent and the ceramic powder has obvious defects, when the coupling agent When the amount is too large, it is easy to increase the dielectric loss of the material; when the amount of coupling agent is too small, if it is directly mixed with ceramic powder, it is easy to agglomerate with only a small amount of ceramic powder, which is not conducive to the dispersion of ceramic powder

In addition, the microstructure of the ceramic-polymer produced by the current method is not uniform, resulting in a low dielectric constant and poor dielectric properties.

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