Epoxy-resin-based high-dielectric composite material and preparation method thereof

A technology of epoxy resin and composite material, which is applied in the field of nano-composite materials to achieve the effect of reducing dielectric loss and significant interface polarization

Active Publication Date: 2016-09-21
SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the embodiment, the BT@Ag / PVDF composite material was prepared, and its maximum dielectric constant was 183, which was 80% higher than that of the BT filler composite material, but its dielectric loss was about 0.2, which was still relatively large

Method used

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  • Epoxy-resin-based high-dielectric composite material and preparation method thereof
  • Epoxy-resin-based high-dielectric composite material and preparation method thereof
  • Epoxy-resin-based high-dielectric composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 1. Preparation of modified BTNC powder

[0044] (1) Weigh 9.9g BT powder, 0.07g Nb 2 o 5 and 0.03g Co 3 o 4 powder, put it in a mortar, grind and mix it, then pour it into a ball mill jar, and mill it on a ball mill at 300rpm for 1 hour, so that the three are fully mixed;

[0045] (2) Put the mixture obtained above in a porcelain boat, raise the temperature to 1400 °C at a rate of 20 °C / min in a tube furnace, and keep the temperature constant for 2 hours, then cool it naturally to obtain a relatively hard block calcined product;

[0046] (3) Use an agate mortar to crush the obtained calcined product into particles with a particle size of less than 2 mm, and mill it on a ball mill at 400 rpm for 3 hours to obtain BTNC micron powder with a particle size of 0.2 μm to 2 μm, which is used to prepare composite materials.

[0047] 2. Preparation of BTNC / epoxy resin dielectric composites

[0048] (1) Weigh 0.5g of epoxy resin and place it in a polytetrafluoroethylene beake...

Embodiment 2

[0054] 1. Preparation of modified BTNC powder

[0055] (1) Weigh 9.7g BT powder, 0.21g Nb 2 o 5 and 0.09g Co 3 o 4 powder, put it in a mortar, grind and mix it, then pour it into a ball mill jar, and mill it on a ball mill at 300rpm for 2 hours, so that the three are fully mixed;

[0056] (2) Put the mixture obtained above in a porcelain boat, raise the temperature to 1300 °C at a rate of 10 °C / min in a tube furnace, and keep the temperature at a constant temperature for 3 hours, then allow it to cool naturally to obtain a relatively hard block calcined product;

[0057] (3) The obtained calcined product was crushed into particles with a particle size of less than 2 mm using an agate mortar, and ball milled on a ball mill at 400 rpm for 2 hours to obtain BTNC micron powder with a particle size of 0.2 μm to 2 μm, which was used to prepare composite materials.

[0058] 2. Preparation of BTNC / epoxy resin dielectric composites

[0059] (1) Weigh 0.5g of epoxy resin and place ...

Embodiment 3

[0064] 1. Preparation of modified BTNC powder

[0065] (1) Weigh 9.5g BT powder, 0.36g Nb 2 o 5 and 0.14g Co 3 o 4 powder, put it in a mortar, grind and mix it, then pour it into a ball mill jar, and mill it on a ball mill at 300rpm for 1.5h, so that the three are fully mixed;

[0066] (2) Put the mixture obtained above in a porcelain boat, heat up to 1320°C at a rate of 30°C / min in a tube furnace, and keep the temperature constant for 1 hour, then cool it naturally to obtain a relatively hard block calcined product;

[0067] (3) Use an agate mortar to crush the obtained calcined product into particles with a particle size of less than 2 mm, and mill it on a ball mill at 400 rpm for 4 hours to obtain BTNC micron powder with a particle size of 0.2 μm to 2 μm, which is used to prepare composite materials.

[0068] 2. Preparation of BTNC / epoxy resin dielectric composites

[0069] (1) Weigh 0.5g of epoxy resin and place it in a polytetrafluoroethylene beaker, add 0.12g of cur...

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Abstract

The invention discloses an epoxy-resin-based high-dielectric composite material and a preparation method thereof. According to the composite material, epoxy resin serves as a base body, modified barium titanate serves as filler, and the modified barium titanate is modified barium titanate BTNC doped with niobium pentoxide and cobaltosic oxide. The modified barium titanate BTNC is fully mixed with epoxy resin and a curing agent, heating and curing are conducted, and the BTNC / epoxy resin dielectric composite material is obtained. Compared with an epoxy resin composite material filled with barium titanate which is not modified, the composite material has a higher dielectric constant, lower dielectric consumption and better temperature stability.

Description

technical field [0001] The invention relates to an epoxy resin-based high-dielectric composite material and a preparation method thereof, belonging to the technical field of nanocomposite materials. Background technique [0002] With the increase in the application requirements of miniaturization, integration, high frequency, and planarization of semiconductor devices, the performance requirements for electronic components (such as dielectric substrates, embedded film capacitors, etc.) are also more stringent, and they need to have excellent dielectric properties properties, mechanical properties and processing properties. [0003] Due to the advantages of simple process, low cost, compatibility with flexible substrates, and suitable for large-area production, polymer-based high dielectric constant composite materials make it suitable for high energy storage density dielectric materials, high-voltage cable stress cone materials, artificial muscles and drugs. The field of re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08K9/02C08K3/24C08K3/22
CPCC08K3/22C08K3/24C08K9/02C08K2003/2289C08K2201/003C08K2201/011C08L2201/08C08L2203/20C08L2203/30C08L2205/24C08L63/00
Inventor 徐海萍史国银仇厚田杨丹丹王静荣
Owner SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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