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Preparation method of high-dielectric-constant ceramics/polymer-based composite dielectric materials

A high dielectric constant and dielectric material technology, applied in the field of composite materials, can solve the problem of poor interface bonding, low dielectric constant of composite dielectric materials, poor mixing uniformity of copper calcium titanate ceramic powder and polyvinylidene fluoride, etc. problem, to achieve the effect of increasing the dielectric constant

Inactive Publication Date: 2012-09-05
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Application Information

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Problems solved by technology

The disadvantages of its preparation method are: the mixing uniformity of copper calcium titanate ceramic powder and polyvinylidene fluoride is poor, the interface bonding between copper calcium titanate ceramic powder and polyvinylidene fluoride is poor, and the dielectric strength of the prepared composite dielectric material is poor. constant is still low

Method used

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  • Preparation method of high-dielectric-constant ceramics/polymer-based composite dielectric materials
  • Preparation method of high-dielectric-constant ceramics/polymer-based composite dielectric materials
  • Preparation method of high-dielectric-constant ceramics/polymer-based composite dielectric materials

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preparation example Construction

[0013] The present invention will be described in further detail below. The preparation method of high dielectric constant ceramic / polymer matrix composite dielectric material is characterized in that the steps of preparation are as follows:

[0014] 1. Filler pretreatment: add the silane coupling agent Si69 dropwise to the copper calcium titanate ceramic powder, the mass of the dropped silane coupling agent Si69 accounts for 5% to 10% of the mass of the copper calcium titanate ceramic powder, stir Evenly, then bake in an oven at 150°C for 5 minutes to 15 minutes;

[0015] 2. Ingredients: Measure polyvinylidene fluoride and pretreated copper calcium titanate ceramic powder according to the proportion; the volume percentage of copper calcium titanate ceramic powder is 10% to 40%, and the particles of copper calcium titanate ceramic powder The size is 10μm~500μm, and the balance is polyvinylidene fluoride;

[0016] 3. Prepare the raw material mixture: put the measured copper c...

Embodiment 1

[0021] Add the silane coupling agent Si69 dropwise to the copper calcium titanate ceramic powder, the mass of the dropped silane coupling agent Si69 accounts for 5% of the mass of the copper calcium titanate ceramic powder, stir evenly, and then place it in an oven at 150°C Bake for 10 minutes; measure the polyvinylidene fluoride and the pretreated copper calcium titanate ceramic powder according to the volume ratio of 83:17, the volume percentage of the copper calcium titanate ceramic powder is 17%; the measured Copper calcium titanate ceramic powder and polyvinylidene fluoride are placed in a container, and N,N-dimethylformamide is poured into it. The volume ratio of polyvinylidene fluoride to N,N-dimethylformamide is 1:18, Stir in a magnetic stirrer for 1 hour to make a raw material mixture; coat the raw material mixture on a glass plate with a coating thickness of 0.2mm, remove it after natural drying to form a composite dielectric film; spread the composite dielectric film...

Embodiment 2

[0023] Add the silane coupling agent Si69 dropwise to the copper calcium titanate ceramic powder, the mass of the dropped silane coupling agent Si69 accounts for 10% of the mass of the copper calcium titanate ceramic powder, stir evenly, and then place it in an oven at 150°C Bake for 10 minutes; measure the polyvinylidene fluoride and the pretreated copper calcium titanate ceramic powder according to the volume ratio of 83:17, the volume percentage of the copper calcium titanate ceramic powder is 17%; the measured Copper calcium titanate ceramic powder and polyvinylidene fluoride are placed in a container, and N,N-dimethylformamide is poured into it. The volume ratio of polyvinylidene fluoride to N,N-dimethylformamide is 1:18, Stir in a magnetic stirrer for 1 hour to make a raw material mixture; coat the raw material mixture on a glass plate with a coating thickness of 0.2mm, remove it after natural drying to form a composite dielectric film; spread the composite dielectric fil...

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Abstract

The invention belongs to the field of composite materials, and relates to the improvement of a preparation method of high-dielectric-constant ceramics / polymer-based composite dielectric materials. The preparation method comprises the following steps of filler pretreatment, material proportioning, raw material mixed liquid preparation, film coating, and hot pressing and molding. Through the novel method for preparing the high-dielectric-constant ceramics / polymer-based composite dielectric materials, provided by the invention, the dielectric constant of the composite dielectric materials is improved.

Description

technical field [0001] The invention belongs to the field of composite materials and relates to the improvement of the preparation method of high dielectric constant ceramics / polymer matrix composite dielectric materials. Background technique [0002] Chinese patent application "a high dielectric constant ceramic / polymer-based composite dielectric material and its preparation method" (application number: 201210094770.8) discloses the use of mixed powder of polyvinylidene fluoride and copper calcium titanate ceramics by hot pressing. A high dielectric constant ceramic / polymer matrix composite dielectric material and a preparation method thereof. The disadvantages of its preparation method are: the mixing uniformity of copper calcium titanate ceramic powder and polyvinylidene fluoride is poor, the interface bonding between copper calcium titanate ceramic powder and polyvinylidene fluoride is poor, and the dielectric strength of the prepared composite dielectric material is poo...

Claims

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Application Information

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IPC IPC(8): C08L27/16C08K9/06C08K3/24C08J5/18B29C43/58
Inventor 宋洪松杨程
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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