Ceramic/polymer composite with high dielectric constant and preparation method thereof

A high dielectric constant, polymer material technology, applied in the field of composite materials, can solve the problems of unfavorable ceramic powder dispersion, increased dielectric loss of materials, uneven microstructure, etc., to reduce dielectric loss and increase dielectric constant. , the effect of good combination

Active Publication Date: 2015-10-21
佛山国防科技工业技术成果产业化应用推广中心
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 materia

Method used

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  • Ceramic/polymer composite with high dielectric constant and preparation method thereof
  • Ceramic/polymer composite with high dielectric constant and preparation method thereof
  • Ceramic/polymer composite with high dielectric constant and preparation method thereof

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preparation example Construction

[0034] The invention provides a method for preparing a high dielectric constant ceramic-polymer composite material, comprising:

[0035] Step 1, dissolving the silane coupling agent in the first solvent to prepare a first solution;

[0036] Step 2, after mixing the ceramic powder with the first solution, preparing a suspension;

[0037] Step 3, dissolving the polymer material in the second solvent to prepare a second solution;

[0038] Step 4. After mixing the suspension with the second solution, a ceramic-polymer composite slurry is prepared;

[0039] Step 5, after preparing the ceramic-polymer composite material slurry into a solid film, modifying the solid film by heat treatment;

[0040] Step 6: After pressing together the surfaces with higher polymer density in the two solid films, a multi-layer composite material is produced.

[0041] In step 3, after the silane coupling agent is dissolved in the first solvent to prepare the first solution, after mixing with the ceram...

Embodiment 1

[0056] A method for preparing a high dielectric constant ceramic-polymer composite material, comprising:

[0057] Step 1. Dissolving the silane coupling agent in ethanol to prepare the first solution, specifically: adding the silane coupling agent to the first solvent to hydrolyze to obtain a hydrolyzed solution, then fully stirring the hydrolyzed solution to prepare the first solution solution.

[0058] In this embodiment, the first solvent is an ethanol solvent composed of 95% ethanol and 5% water, and the silane coupling agent is added to the ethanol solvent, and wait for 5 minutes to hydrolyze it to form silanol, and then stir for 12 hours. Prepare the first solution.

[0059] Step 2, barium strontium titanate (BaSrTiO 3 , BST) ceramic powder was mixed with the first solution to prepare barium strontium titanate-silane coupling agent suspension.

[0060] Step 3, dissolving the polymer material polyvinylidene fluoride-chlorotrifluoroethylene P (VDF-CTFE) in a second solv...

Embodiment 2

[0067] A method for preparing a high dielectric constant ceramic-polymer composite material, comprising:

[0068] Step 1. Dissolving the silane coupling agent in ethanol to prepare the first solution, specifically: adding the silane coupling agent to the first solvent to hydrolyze to obtain a hydrolyzed solution, then fully stirring the hydrolyzed solution to prepare the first solution solution.

[0069] Step 2, barium strontium titanate (BaSrTiO 3 , BST) ceramic powder was mixed with the first solution to prepare barium strontium titanate-silane coupling agent suspension.

[0070] Step 3, dissolving the polymer material polyvinylidene fluoride-chlorotrifluoroethylene P (VDF-CTFE) in a second solvent to prepare a second solution, wherein the mixing ratio of VDF / CTFE is 88 / 12 mol%;

[0071] The volume ratio of BST to polymer matrix was 40%.

[0072] Step 4. After mixing the barium strontium titanate-silane coupling agent suspension with the second solution, ultrasonically di...

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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 ...

Claims

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Application Information

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IPC IPC(8): B32B27/08B32B27/18B32B27/20
CPCB32B27/08B32B27/18B32B27/20B32B2307/204
Inventor 吴佩萱房飞宇张麟陈新王晗陈新度刘强
Owner 佛山国防科技工业技术成果产业化应用推广中心
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