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Submicron ceramic filler-based high-temperature-resistant composite film material and preparation method thereof

A technology of ceramic filler and composite film, which is used in film/thick film capacitors, parts of fixed capacitors, and dielectrics of fixed capacitors, etc., can solve the problems of low energy storage efficiency, and achieve high energy storage efficiency, good high temperature resistance, The effect of low dielectric loss

Active Publication Date: 2020-06-19
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its energy storage efficiency is low, about 50-60%

Method used

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  • Submicron ceramic filler-based high-temperature-resistant composite film material and preparation method thereof
  • Submicron ceramic filler-based high-temperature-resistant composite film material and preparation method thereof
  • Submicron ceramic filler-based high-temperature-resistant composite film material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A high-temperature-resistant composite film material based on submicron ceramic fillers includes a base polymer and a ceramic filler doped in the base polymer; the ceramic filler adopts barium titanate ceramic particles with a particle size of 500nm. The ceramic filler is surface modified to enhance the compatibility of the ceramic filler and the polymer matrix. The base polymer adopts PMMA. The mass fraction of the ceramic filler in the composite film material is 3%.

[0037] The surface modification of barium titanate ceramic particles with a particle size of 500nm enhances the compatibility between the ceramic filler and the polymer matrix; after dissolving the PMMA as the base polymer with a polar solvent, adding a certain amount of titanium Put the barium acid ceramic particles into the PMMA solution to prepare a composite solution, cast the composite film material by casting method, dry it at 150-250°C to obtain the composite material, and obtain the PMMA / DBT (50...

Embodiment 2

[0047] The aforementioned preparation method based on submicron ceramic filler high temperature resistant composite film material (i.e. PMMA / DBT (500nm) composite material) comprises the following processing steps:

[0048] (1) Add a certain amount of base polymer into the polar solution, place it at 40-80°C and stir it for 6-12 hours until it is completely dissolved to form a clear and transparent polymer solution; the material of base polymer and polar solution The liquid ratio is 3-100g / L. The base polymer adopts PMMA.

[0049] (2) Add a certain amount of surface-modified ceramic filler into the polymer solution obtained in step (1), stir thoroughly, and vibrate ultrasonically, and circulate like this for 2 to 5 times to form a stable suspension. The ceramic filler adopts barium titanate particles with a particle size of 500nm; the solid-liquid ratio of the ceramic filler to the polymer solution is 1-100g / L.

[0050] (3) Apply the suspension obtained in step (2) evenly to...

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Abstract

The invention discloses a submicron ceramic filler-based high-temperature-resistant composite film material and a preparation method thereof. A film capacitor is used in the field of electronic information, a large amount of heat is discharged, and the film capacitor needs to bear a certain temperature, for example, the film capacitor can work for a long time at 70 DEG C. The submicron ceramic filler-based high-temperature-resistant composite film material comprises a substrate polymer and the ceramic filler doped in the substrate polymer, wherein the ceramic filler adopts barium titanate ceramic particles with the particle size of 60-900nm, and the ceramic particles are modified by a surfactant and the substrate polymer is PMMA (polymethyl methacrylate). Compared with a PVDF polymer, thecomposite film material has the advantages that the energy storage performance is high in stability in a high-temperature environment of 70 DEG C, and the energy storage density and the energy storageefficiency are still high. The 500nm barium titanate ceramic filler is added into the linear dielectric PMMA so that the breakdown strength of the composite material is increased to the maximum extent, and the energy storage density and the energy storage efficiency are improved.

Description

technical field [0001] The invention belongs to the technical field of preparation of electronic functional materials, and in particular relates to a preparation method of a high-energy-storage density and high-efficiency composite film material based on submicron ceramic fillers capable of resisting high temperatures. Background technique [0002] With the development of information technology, film capacitors are crucial in the fields of electronic equipment and microelectronics, such as inverters, pulse power devices, etc. With the rapid reduction in the size of capacitors on printed circuit boards, the study of new thin and high dielectric materials has become a frontier topic in the field of information functional materials and microelectronics. [0003] Common capacitor materials include polymer materials and ceramic materials. Polymers have high Young's modulus and high dielectric field strength. The breakdown field strength of polymers is close to 400MV / m, but the di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/12C08K9/06C08K9/04C08K3/24C08J5/18C08J7/00H01G4/06H01G4/33
CPCC08J5/18C08J7/08H01G4/06H01G4/33C08J2333/12C08K9/06C08K9/04C08K3/24C08K2201/011
Inventor 李丽丽徐鑫鑫楼旱雨吴薇王高峰
Owner HANGZHOU DIANZI UNIV
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