Composite material with high dielectric constant and preparation method for composite material

A technology of high dielectric constant and composite materials, which is applied in fixed capacitance parts, fixed capacitor dielectrics, etc., can solve the problems of damaging the flexibility and mechanical properties of polymers, low dielectric constant of composite materials, and agglomeration of nanoparticles. Achieve the effect of low cost, good flexibility and simple process

Inactive Publication Date: 2012-09-05
NINGBO UNIV
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Problems solved by technology

However, like the polymer/ceramic particle system, the filling of metal particles also destroys the flexibi

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  • Composite material with high dielectric constant and preparation method for composite material
  • Composite material with high dielectric constant and preparation method for composite material
  • Composite material with high dielectric constant and preparation method for composite material

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Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0024] A kind of preparation method of high dielectric constant composite material, this high dielectric composite material comprises nanometer Fe 3 o 4 Granules and polyvinylidene fluoride powder are two components, and the preparation process is as follows:

[0025] 1. Nano Fe 3 o 4 Preparation of particles: First, take 6.215g of FeCl 3 ·6H 2 O and 3.19 g FeSO 4 ·7H 2 O mixed well, dissolved in 75ml of deionized water, Fe 2+ / Fe 3+ The molar ratio of the solution is 1:2, the prepared mixed solution is placed in a three-necked flask, placed in a constant temperature water bath at 55°C, stirred rapidly, and NH 3 ·H 2 0 until the pH is 11-12, continue to stir and raise the temperature to 75°C for 2 hours, and the whole experiment process is carried out under the protective atmosphere of nitrogen. Then use a strong magnet to settle, s...

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Abstract

The invention relates to a composite material with a high dielectric constant and a preparation method for the composite material. The composite material with the high dielectric constant is formed by hot-pressing and molding polyvinylidene fluoride powder which serves as a base material and nano Fe3O4 particles which serve as a filling material, wherein the volume of the nano Fe3O4 particles accounts for 3-22% of the composite material. The method comprises the following steps of: preparing the nano Fe3O4 particles by adopting a hydrothermal method; converting the volume percentage of 3 to 22 percent of nano Fe3O4 particles into a mass ratio; mixing and uniformly stirring the nano Fe3O4 particles and the polyvinylidene fluoride powder; and obtaining the composite material with the high dielectric constant by hot-pressing and molding at a temperature of 180 to 220 DEG C under a pressure of 6 to 15 Mpa to obtain composite material with high dielectric constant. The preparation process is simple, low in power consumption, low in cost and molded conveniently; and the obtained raw materials are not required to be subjected to further chemical treatment.

Description

technical field [0001] The invention belongs to the technical field of composite materials, in particular to a high dielectric constant composite material containing oxide nanoparticle fillers and a preparation method thereof. Background technique [0002] Polymer dielectric material is a material with a wide range of applications and plays a vital role in the electronics, electrical machinery and cable industries. With the rapid development of electronics, information and electric power industries in recent decades, materials that only rely on one material as electrical components (such as capacitors) have shown many defects. For example, capacitors made solely of ceramic materials with high dielectric constants, despite their high capacitance values, have their Achilles' heels in use due to complex manufacturing processes, high production costs, high energy consumption, poor flexibility, and easy cracking. It is very difficult to use this material to manufacture capacitor...

Claims

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Application Information

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IPC IPC(8): C08L27/16C08K3/22B29C43/58H01G4/06
Inventor 王新明李伟平单洪强诸跃进罗来慧
Owner NINGBO UNIV
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