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
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[0013] The present invention will be described in further detail below. The method for preparing a high dielectric constant ceramic / polymer-based composite dielectric material is characterized in that the preparation steps are as follows:
[0014] 1. Filler pretreatment: Add the silane coupling agent Si69 dropwise to the copper calcium titanate ceramic powder, and the weight of the dropped silane coupling agent Si69 accounts for 5% to 10% of the weight of the copper calcium titanate ceramic powder. Stir Evenly, then put in a 150℃ oven and bake for 5min~15min;
[0015] 2. Ingredients: measure the polyvinylidene fluoride and the pretreated copper calcium titanate ceramic powder according to the proportion; the volume percentage of the copper calcium titanate ceramic powder is 10%-40%, and the particles of the copper calcium titanate ceramic powder The size is 10μm~500μm, the balance is polyvinylidene fluoride;
[0016] 3. Preparation of raw material mixture: Place the measured copper...
Example Embodiment
[0020] Example 1
[0021] The silane coupling agent Si69 was added dropwise to the copper calcium titanate ceramic powder. The weight of the silane coupling agent Si69 added was 5% of the weight of the copper calcium titanate ceramic powder. Stir it evenly, and then place it in a 150℃ oven Bake for 10 minutes; measure the polyvinylidene fluoride and the pretreated copper calcium titanate ceramic powder in a volume ratio of 83:17, the volume percentage of the copper calcium titanate ceramic powder is 17%; The copper calcium titanate ceramic powder and polyvinylidene fluoride are placed in a container, and N,N-dimethylformamide is poured. The volume ratio of polyvinylidene fluoride to N,N-dimethylformamide is 1:18. Place it in a magnetic stirrer and stir for 1 hour to make a raw material mixture; coat the raw material mixture on a glass plate with a thickness of 0.2mm. After natural drying, peel off to form a composite dielectric film; spread the composite dielectric film In the f...
Example Embodiment
[0022] Example 2
[0023] The silane coupling agent Si69 was added dropwise to the copper calcium titanate ceramic powder. The weight of the silane coupling agent Si69 added was 10% of the weight of the copper calcium titanate ceramic powder. Stir it evenly, and then place it in a 150℃ oven Bake for 10 minutes; measure the polyvinylidene fluoride and the pretreated copper calcium titanate ceramic powder in a volume ratio of 83:17, the volume percentage of the copper calcium titanate ceramic powder is 17%; The copper calcium titanate ceramic powder and polyvinylidene fluoride are placed in a container, and N,N-dimethylformamide is poured. The volume ratio of polyvinylidene fluoride to N,N-dimethylformamide is 1:18. Place it in a magnetic stirrer and stir for 1 hour to make a raw material mixture; coat the raw material mixture on a glass plate with a thickness of 0.2mm, and then peel off after natural drying to form a composite dielectric film; spread the composite dielectric film ...
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