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Barium strontium niobate/boron nitride three-dimensional network material and preparation method thereof

A technology of barium strontium niobate and three-dimensional network is applied in the field of barium strontium niobate/boron nitride three-dimensional network material and preparation, which can solve the problems of poor processability and reduced breakdown field strength of composite dielectric films, and achieves Improve dielectric properties, facilitate heat dispersion and transfer, and enhance the effect of interaction

Inactive Publication Date: 2019-11-19
HENAN INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, scientists use the method of adding high dielectric constant ceramic particles to polymers to obtain high dielectric constant composite materials, but continue to increase the volume fraction of fillers in the polymer matrix (>60%), and the room temperature dielectric The increase of the constant is not obvious (~100), while the breakdown field strength of the composite dielectric film is greatly reduced, and its processability becomes worse

Method used

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  • Barium strontium niobate/boron nitride three-dimensional network material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A preparation method of barium titanate / boron nitride composite material with one-dimensional core-shell structure:

[0022] (1) Slurry configuration: use strontium barium niobate nanopowder, boron nitride nanopowder, polyvinyl alcohol, carboxymethyl cellulose, polyacrylamide, etc. as raw materials, among which strontium barium niobate nanopowder The mass ratio of boron nitride, polyvinyl alcohol, carboxymethyl cellulose and polyacrylamide is 1:0.2:1:1:2 to prepare a good thixotropic slurry;

[0023] (2) Regulation of the pore size of the dry loofah template: prepare 11mol / L NaOH solution, then put the dry loofah in NaOH solution for 20 minutes, wash 3 times, and then dry at 50°C for 2 hours;

[0024] (3) Preparation of barium strontium niobate / boron nitride three-dimensional network material: soak the treated dry loofah in the above slurry, then extrude to remove excess slurry, and dry at 50°C for 20 hours. Repeat the above slurrying and drying steps twice, heat treat...

Embodiment 2

[0027] A preparation method of barium titanate / boron nitride composite material with one-dimensional core-shell structure:

[0028] (1) Slurry configuration: use strontium barium niobate nanopowder, boron nitride nanopowder, polyvinyl alcohol, carboxymethyl cellulose, polyacrylamide, etc. as raw materials, among which strontium barium niobate nanopowder The mass ratio of boron nitride, polyvinyl alcohol, carboxymethyl cellulose and polyacrylamide is 1:1:2:3:3 to prepare a slurry with good thixotropic properties;

[0029] (2) Regulation of the pore size of the dry loofah template: prepare 8mol / L NaOH solution, then put the dry loofah in NaOH solution for 100min, wash 5 times, and then dry at 120°C for 2h;

[0030] (3) Preparation of barium strontium niobate / boron nitride three-dimensional network material: soak the treated dry loofah in the above slurry, then extrude to remove excess slurry, and dry at 120°C for 2 hours. Repeat the above slurrying and drying steps 10 times, he...

Embodiment 3

[0032] A preparation method of barium titanate / boron nitride composite material with one-dimensional core-shell structure:

[0033] (1) Slurry configuration: use strontium barium niobate nanopowder, boron nitride nanopowder, polyvinyl alcohol, carboxymethyl cellulose, polyacrylamide, etc. as raw materials, among which strontium barium niobate nanopowder The mass ratio of boron nitride, polyvinyl alcohol, carboxymethyl cellulose and polyacrylamide is 1:0.5:1.5:1.5:2.5 to prepare a slurry with good thixotropic properties;

[0034] (2) Regulation of the pore size of the dried loofah template: prepare 5mol / L NaOH solution, then place the dried loofah in NaOH solution for 50min, wash 5 times, and then dry at 100°C for 4.5h;

[0035] (3) Preparation of barium strontium niobate / boron nitride three-dimensional network material: soak the treated dry loofah in the above slurry, then extrude to remove excess slurry, and dry at 100°C for 5 hours. Repeat the above steps of slurrying and d...

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Abstract

The invention provides a barium strontium niobate / boron nitride three-dimensional network material and a preparation method thereof. According to the method, dry luffa is used as a template, and a three-dimensional network barium strontium niobate / boron nitride filler is prepared by adopting a sacrificial template method; barium strontium niobate / boron nitride nano-powder, polyvinyl alcohol, carboxymethyl cellulose and polyacrylamide are used as raw materials for preparation of slurry with good thixotropic properties; the dry luffa is treated by a NaOH solution so as to regulate and control the pore diameter and the communication mode of the dry luffa; then treated dry luffa is soaked into the slurry, then squeezed to remove redundant slurry, and finally dried; and the steps of slurry hanging and drying are repeated a plurality of times, and then heat treatment is performed to obtain the barium strontium niobate / boron nitride filler with a three-dimensional network structure. The barium strontium niobate / boron nitride filler with the three-dimensional network structure can realize effective linking among the filler under the condition of low volume fraction filling, so the interaction among the filler is improved, and the dielectric property of the material is enhanced.

Description

technical field [0001] The invention relates to the technical field of composite material preparation, in particular to a barium strontium niobate / boron nitride three-dimensional network material and a preparation method. Background technique [0002] High energy storage density dielectric capacitors have the advantages of large discharge power, high utilization efficiency, fast charge and discharge speed, and stable performance. They play an important role in power systems, electronic devices, and pulse power supplies. They are widely used in hybrid vehicles, pulse Modern industrial and national defense fields such as power systems, electromagnetic guns, solar energy and other new energy power generation systems, and electromagnetic launch platforms. With the development of electronic devices in the direction of miniaturization and high performance, high power density and high integration have become the development direction of electrical equipment and electronic devices. ...

Claims

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Application Information

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IPC IPC(8): C04B35/495C04B35/5835C04B35/622C04B38/06C01G23/00C01B21/064
CPCC01B21/0648C01G23/006C01P2004/10C01P2004/80C04B35/495C04B35/583C04B35/622C04B38/0615C04B2235/3213C04B2235/3215C04B2235/616
Inventor 刘少辉王娇郝好山赵利敏
Owner HENAN INST OF ENG
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