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Hybridized particle, polymer-based composite material, their preparation methods and use of polymer-based composite material

A technology of hybrid particles and composite materials, applied in the field of polymer-based composite materials and their preparation, can solve the problems of increased dielectric loss of composite materials, energy loss, and reduced withstand voltage strength of composite materials.

Active Publication Date: 2014-06-11
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] First, the high dielectric constant can only be obtained near the percolation threshold, and the dielectric constant increases very little when the amount is far from the threshold.
The percolation threshold is affected by the particle size, shape, surface state, and dispersion of the added powder, so it is difficult to obtain materials with stable dielectric properties during the processing of such materials
[0006] Second, when the dielectric constant gets a higher value, the dielectric loss of the composite material will also increase greatly
The increase in loss will cause more heat energy to be generated after the composite material is applied to the circuit board, resulting in energy loss and a decrease in the performance of the circuit board
[0007] Third, with the addition of conductive particles, while the dielectric constant increases, the conductivity of the composite material will also increase, which leads to a decrease in the withstand voltage strength of the composite material and affects its use value.

Method used

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  • Hybridized particle, polymer-based composite material, their preparation methods and use of polymer-based composite material
  • Hybridized particle, polymer-based composite material, their preparation methods and use of polymer-based composite material
  • Hybridized particle, polymer-based composite material, their preparation methods and use of polymer-based composite material

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preparation example Construction

[0050] The first preparation method: the above-mentioned hybrid particles are prepared by mechanical ball milling, and the method includes the following steps:

[0051] The hybrid particles are obtained by ball milling the insulating ceramic particles 1, the conductive particles 2, a solvent, a surfactant, and a pH regulator.

[0052] In the above steps of the mechanical ball milling method, the conductive particles 2 with slightly smaller particle size and higher surface energy are physically adsorbed and combined with the insulating ceramic particles 1 during the ball milling process to obtain hybrid composite particles. The synergistic effect of the surfactant and the pH regulator makes the structure of the prepared hybrid particle stable. Among them, the surfactant can effectively improve the surface energy of the conductive particles 2 and the insulating ceramic particles 1, and its added amount is 0.5-5% of the total mass of the insulating ceramic particles 1 and the con...

Embodiment 1

[0083] A barium titanate hybrid particle with silver conductive silver particles loaded on the surface, the preparation process of which is as follows:

[0084] Weigh 100nm BaTiO 3 5g, AgNO 3 5g and 300ml of ethylene glycol were mixed into a 500ml three-necked flask, and the BaTiO 3 The particles are evenly dispersed, and the three-necked flask is connected with a thermometer and a cooling water condensing device. Heating in an oil bath, raising the temperature from room temperature to 140°C took 25 minutes, then 140 minutes and keeping it warm for 20 minutes, then cooling down to room temperature, centrifuging, cleaning, and drying naturally to obtain 7.5g of gray powder, which is the surface of titanium loaded with silver conductive silver particles. Barium acid hybrid particles.

[0085] Carry out SEM and TEM analysis respectively to the barium titanate hybrid grain that the surface load silver conductive silver particle of present embodiment 1 prepares, the result of SE...

Embodiment 2

[0087] A barium titanate hybrid particle loaded with conductive carbon particles on the surface, the preparation process of which is as follows:

[0088] Weigh 100nm BaTiO 3 20g, glucose 1g, add 20g of distilled water, ultrasonically stir to disperse evenly, put it in a drying oven for 24 hours, then put it into the N 2 Heating in a protected muffle furnace, the heating curve is from room temperature at 5°C / min to 100°C for 1 hour, then at 5°C / min to 400°C for 2 hours and then cooling down naturally to obtain a black powder, namely It is a barium titanate hybrid particle loaded with carbon conductive particles on the surface.

[0089] The barium titanate hybrid particles loaded with conductive carbon particles on the surface prepared in Example 2 were analyzed by SEM and TEM respectively, and it was found that the BaTiO in the hybrid particles 3 The particle size is 100nm and the shape is spherical, and the conductive carbon particles carried on the surface have a particle s...

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Abstract

The invention discloses hybridized particles, a polymer-based composite material, their preparation methods and a use of the polymer-based composite material. The hybridized particles comprise insulating ceramic particles and conductive microparticles loaded on the surfaces of the insulating ceramic particles. The conductive microparticles are granularly and discretely distributed on the surfaces of the insulating ceramic particles. The preparation method of the hybridized particles adopts an in-situ chemical-reduction technology, a sol-gel technology, an in-situ polymerization technology, a high-temperature heat treatment technology or a mechanical milling technology. The polymer-based composite material comprises the hybridized particles and a polymer filled with the hybridized particles. The polymer-based composite material comprises 20-80wt% of the hybridized particles. The hybridized particles have stable structures and stable performances. The polymer-based composite material has the excellent performances such as high dielectric constant, low dielectric loss and stable performances. The preparation methods of the hybridized particle and the polymer-based composite material have the advantages of simple process, easy control of conditions, high production efficiency and industrial production applicability.

Description

technical field [0001] The invention relates to a hybrid particle and a preparation method thereof, a polymer-based composite material, a preparation method and application thereof. Background technique [0002] With the development of printed circuit board technology, higher and higher requirements are put forward for the development of electronic information materials. As an important part of electronic information materials, dielectric materials are widely used in printed circuit boards. At present, dielectric materials can be mainly divided into polymer materials, ceramic materials and ceramic-polymer composite materials. Polymer materials are widely used in circuit boards in the form of copper clad laminates due to their good flexibility and compatibility with printed circuit board production. However, polymer as a dielectric material cannot fully meet the development needs of planar or built-in discrete capacitors in circuit boards due to the disadvantage of low diel...

Claims

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Application Information

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IPC IPC(8): C08K9/12C08L63/00C08L79/08C08L67/00C08L61/06C08L101/00
CPCC08L101/00C08K7/18C04B35/00C08K3/22C08K3/08C08K3/04C08K9/02C04B26/10C04B2111/00844C08K9/08C08K9/10C08K2201/001C08L101/12C04B20/0004C04B14/30
Inventor 于淑会罗遂斌孙蓉梁先文赖茂柏万杰郭慧子
Owner SHENZHEN INST OF ADVANCED TECH
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