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Preparation method of polymer based dielectric material

A technology of electrical materials and polymers, which is applied in the field of dielectric materials to achieve the effects of improving dispersibility, uniform dispersion and surface activity.

Inactive Publication Date: 2018-11-06
WUHU COUNTY YILUN ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Metal ions have good conductivity. Adding a small amount of conductive particles to polymer dielectric materials can effectively improve its dielectric properties. Carbon material particles have high conductivity, and a low dosage can greatly increase the dielectric constant of the polymer. , but whether it is inorganic ceramic materials, metal particles or carbon material particles, there is a shortcoming that they are easy to agglomerate in the matrix. Therefore, improving the compatibility between fillers and polymers is the current research focus of polymer-based dielectric materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The preparation method of the polymer-based dielectric material in this embodiment, the specific steps are as follows:

[0023] 1) Filler pretreatment: place the nano-ceramic particles of copper calcium titanate in a high-speed ball mill, and then dissolve the nonionic surfactant polyoxyethylene ether in an amount of 1.3% of the mass of the nano-ceramic particles in 2 times the volume of deionized After stirring in water until completely dissolved, put it into the atomizer, first adjust the high-speed ball mill to a low speed of 100r / min, and spray the polyoxyethylene ether solution on the surface of the nano-ceramic particles copper calcium titanate while the ball mill is rotating, spray After finishing, increase the rotating speed of the high-speed ball mill to 5500r / min for ball milling pretreatment for 10 minutes, and after natural ventilation and drying, the pretreated nano ceramic particles copper calcium titanate are obtained;

[0024] 2) Preparation of composite...

Embodiment 2

[0027] This embodiment is the same as Example 1, except that the nano-ceramic particles in this embodiment are titanium dioxide, the surfactant is dimethylsiloxane-polyether, and the addition amount is 1% of the quality of the nano-ceramic particles. Magnetron sputtering The condition is that the degree of vacuum is 9×10 -4 Pa, the gas flow rate is 20mL / min, the working pressure is 0.8Pa, the sputtering power is 30w, the sputtering time is 120s, the width of the sheet is 100mm, and the thickness is 1.1mm.

Embodiment 3

[0029] This embodiment is the same as Example 1, except that the nano-ceramic particles in this embodiment are barium titanate, the amount of surfactant added is 1.5% of the mass of the nano-ceramic particles, and the composite filler and polyvinylidene fluoride in the polymer-based dielectric material The mass ratio of ethylene is 0.25:1, and the condition of magnetron sputtering is that the degree of vacuum is 7×10 -4 Pa, the gas flow rate is 10mL / min, the working pressure is 0.45Pa, the sputtering power is 50w, the sputtering time is 100s, the width of the sheet is 100mm, and the thickness is 1mm.

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Abstract

The invention discloses a preparation method of a polymer based dielectric material and relates to the technical field of dielectric materials. The preparation method comprises the steps that ceramicparticles loaded with Ag serve as filler, polyvinylidene fluoride serves as a polymer base, the ceramic particles are subjected to surface modification through a method combining physical ball millingand chemical surface active agents, then the modified ceramic particles are prepared into composite filter by being loaded with metal Ag through an ultrasound-assisted magnetron sputtering method, and finally the polyvinylidene fluoride and the composite filler are subjected to multi-layer co-extrusion alternately. The prepared polymer based dielectric material has high breakdown field strength,high energy density, high dielectric constant and low dielectric loss, and the preparation method is low in energy consumption, environmentally friendly and free of pollution.

Description

technical field [0001] The invention belongs to the technical field of dielectric materials, relates to the technical field of polymer-based dielectric materials, and in particular to a preparation method of polymer-based dielectric materials. Background technique [0002] Dielectric materials store energy in the form of electrostatics and have important applications in the information, electronics and power industries. With the rapid development of the electronics industry, the development and application of polymer matrix composites with high dielectric constant, low dielectric loss, low cost and easy processing has attracted more and more attention. In the field of electrical engineering, such polymer-based composite materials can be used as dielectric materials for capacitors with high energy storage density; in the field of microelectronics, high-capacitance embedded microcapacitors can be prepared on a large scale by selecting a suitable polymer matrix, thereby Ensure...

Claims

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Application Information

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IPC IPC(8): B29C47/06B29C47/92C08L27/16C08K9/12C08K3/08C08K3/22B29L9/00B29L7/00
CPCB29L2007/002B29L2009/00C08K3/08C08K3/22C08K9/12C08K2003/0806C08K2003/2237C08K2003/2241C08L27/16
Inventor 李海涛钱叶球邢武装
Owner WUHU COUNTY YILUN ELECTRONICS
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