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Three-phase composite high-dielectric-property material, manufacturing method and processing method

A high-dielectric, high-performance technology, used in the field of processing embedded capacitors, can solve the problems of large conductivity loss, loss of practical value of conductor/polymer composite materials, etc., and achieve the effects of low loss, excellent dispersion, and excellent dielectric properties.

Inactive Publication Date: 2014-01-22
SOUTH CHINA UNIV OF TECH +1
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Problems solved by technology

This kind of polarization increases the dielectric constant of the polymer-based composite material to a small extent when the filling amount is low, but when the filling amount increases to reach or exceed the percolation threshold, due to the small spacing between the conductive particles, the Free electrons will migrate among the conductive particles to form a conductive path, which will cause a large conductance loss under the action of a low-frequency electric field, making the conductor / polymer composite material lose its practical value

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  • Three-phase composite high-dielectric-property material, manufacturing method and processing method
  • Three-phase composite high-dielectric-property material, manufacturing method and processing method
  • Three-phase composite high-dielectric-property material, manufacturing method and processing method

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preparation example Construction

[0053] The preparation method of the three-phase composite high dielectric performance material of the present invention uses carbon black, barium titanate and epoxy resin as the main ingredients, and the overall technical route (preparation method process) is as follows figure 1 As shown, the preparation is carried out according to the following steps:

[0054] 1) Barium titanate preprocessing;

[0055] 1.1) Add powdered barium titanate into absolute ethanol, mix evenly to obtain a suspension;

[0056] 1.2) Then take the silane coupling agent accounting for 1-2 weight% of the barium titanate powder, add it to dilute with absolute ethanol whose mass is 18-25 times the mass of the silane coupling agent, and obtain an activated diluent;

[0057] 1.3) Add the activated diluent dropwise into the aforementioned suspension at a rate of 1-3 drops per second, stir evenly while adding, and then perform centrifugation;

[0058] 1.4) Dried after centrifugation to obtain surface-activat...

Embodiment 1

[0083] Embodiment one: prepare according to the following steps:

[0084] 1) Barium titanate preprocessing;

[0085] 1.1) Add powdered barium titanate into absolute ethanol, mix evenly to obtain a suspension;

[0086] 1.2) Take the silane coupling agent accounting for 1 weight% of the mass of the barium titanate powder, add it to anhydrous ethanol whose mass is 18 times the mass of the silane coupling agent, and dilute to obtain an activated diluent;

[0087] 1.3) Add the activated diluent dropwise into the aforementioned suspension at a rate of 1 drop per second, stir evenly while adding dropwise, and then perform centrifugation;

[0088] 1.4) Dried after centrifugation to obtain surface-activated barium titanate;

[0089] 2) carbon black preprocessing; such as figure 2 as shown,

[0090] 2.1) Add carbon black to 30 times the mass of nitric acid with a mass fraction of 34%, mix evenly, place in a water bath at 75°C, and stir for 1 hour; obtain an acidic carbon black susp...

Embodiment 2

[0101] Embodiment two: prepare according to the following steps:

[0102] 1) Barium titanate preprocessing;

[0103] 1.1) Add powdered barium titanate into absolute ethanol, mix evenly to obtain a suspension;

[0104] 1.2) Take the silane coupling agent accounting for 2 weight% of the mass of the barium titanate powder and add it to dilute with absolute ethanol 25 times the mass of the silane coupling agent to obtain an activated diluent;

[0105] 1.3) Add the activated diluent dropwise into the aforementioned suspension at a rate of 3 drops per second, stir evenly while adding dropwise, and then perform centrifugation;

[0106] 1.4) Dried after centrifugation to obtain surface-activated barium titanate;

[0107] 2) carbon black preprocessing; such as figure 2 as shown,

[0108] 2.1) Add carbon black to 40 times the mass of nitric acid with a mass fraction of 34%, mix evenly, place in a water bath at 85°C, and stir for 2 hours; obtain an acidic carbon black suspension;

...

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Abstract

The invention provides a three-phase composite high-dielectric-property material, a manufacturing method and a processing method. The three-phase composite high-dielectric-property material comprises surface-activated barium titanate, silicon package carbon blank and epoxy resin. The three-phase composite high-dielectric-property material is manufactured according to the following steps of (1) preprocessing barium titanate, (2) preprocessing carbon blank, (3) reprocessing powdery surface-oxidized carbon blank, (4) preprocessing epoxy resin and (5) taking and adding surface-activated barium titanate and silicon package carbon blank into a epoxy resin butanone solution. The processing method includes the following steps of (1) material preprocessing, (2) curing agent preprocessing, (3) copper foil preprocessing, (4) surface coating and (5) solidifying. According to the three-phase composite high-dielectric-property material, the manufacturing method and the processing method, under the premise that dielectric loss is controlled, conductive particles are used for replacing a part of ferroelectric ceramics to manufacture a conductor / ceramics / a polymer three-phase composite dielectric material, wherein the conductor / the ceramics / the polymer three-phase composite dielectric material can effectively improve the dielectric constant of a polymer matrix composite material. Meanwhile, the problems that carbon blank is difficult to disperse in a polymer and dielectric loss is increased due to the fact that a conductive path is formed after the content of the carbon blank rises are effectively solved.

Description

technical field [0001] The present invention relates to the fields of composite dielectric material and its preparation method, and the method for processing embedded capacitors, in particular to the three-phase composite material of polymer / inorganic dielectric particles / conductive particles, its preparation method, and the method for processing embedded capacitors . Background technique [0002] With the rapid development of science and technology, the requirements for electronic products are more miniaturization, light weight, low cost, multi-function, and high reliability. In the printed circuit board (PCB), passive components are more than 20 times that of active devices, occupying 40% of the space, and the number of capacitors accounts for 40% of passive components, so capacitors occupy an important role in electronic products. status. At present, one of the important development directions of all domestic electronic information product manufacturers that have high r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/02C08K9/10C08K9/06C08K9/04C08K9/02C08K3/24C08K3/04H01G4/00H01G4/06
Inventor 王歆刘继红夏亚飞卢振亚任媛郑良辉
Owner SOUTH CHINA UNIV OF TECH
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