Polyolefin based non-linear dielectric material

A dielectric material, polyolefin-based technology, applied in the direction of plastic/resin/wax insulators, organic insulators, etc., can solve the problems of single type of functional filler, large dosage, poor processing performance, etc., and achieve strong self-homogenizing electric field distribution , large mechanical properties, good electrical conductivity

Inactive Publication Date: 2009-05-27
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problem that the existing polyolefin-based nonlinear dielectric materials have poor physical-mechanical properties and processing performance caused by a single type of functional filler and a large dosage, and provides a polyolefin-based nonlinear dielectric material.

Method used

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specific Embodiment approach 1

[0008] Specific Embodiment 1: In this embodiment, the polyolefin-based nonlinear dielectric material is made of 30-99 parts of polyolefin matrix material, 1-70 parts of functional components and 0.1-1 part of antioxidant in parts by weight. ; wherein the polyolefin matrix material is composed of one or more of polypropylene, high-density polyethylene, low-density polyethylene and linear low-density polyethylene; the functional component is composed of silicon carbide, zinc oxide, aluminum oxide, barium titanate , strontium titanate, zirconium titanate, carbon black, graphite, carbon fiber and carbon nanotubes; the antioxidant is composed of the main antioxidant, or the main antioxidant and the auxiliary antioxidant Composition by mass ratio of 1 to 3:1; wherein the main antioxidant is 4,4`-thiobis(6-tert-butyl-3-methylphenol), tetrakis (β-(3,5- Di-tert-butyl-4-hydroxyphenyl) propionate) pentaerythritol ester and / or 2,6-di-tert-butyl p-cresol; auxiliary antioxidants are dilaury...

specific Embodiment approach 2

[0011] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the polyolefin-based nonlinear dielectric material consists of 40-80 parts of polyolefin matrix material, 10-60 parts of functional components and 0.2 parts by weight. ~0.8 parts of antioxidants. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0012] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the polyolefin-based nonlinear dielectric material consists of 50-70 parts of polyolefin matrix material, 20-50 parts of functional components and 0.3 parts by weight. ~0.7 parts of antioxidants. Others are the same as in the first embodiment.

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Abstract

The invention discloses polyolefin based nonlinear dielectric materials, and relates to nonlinear dielectric materials. The polyolefin nonlinear dielectric materials solve the problems of poor physical-mechanical property and processability caused by single variety of functional filler and large mixing amount of the prior polyolefin based nonlinear dielectric material. TheA first polyolefin based nonlinear dielectric material is prepared from polyolefin base materials, functional compositions and an antioxidant; and thea second polyolefin based nonlinear dielectric material is prepared from low density polyethylene, the functional compositions, the antioxidant and a crosslinking agent. The polyolefin based nonlinear dielectric materials have good electrical conductivity and/or dielectric constant nonlinear characteristic, physical-mechanical property and processability and strong capacity of automatically homogenizing electric field distribution in a non-uniform electric field.

Description

technical field [0001] The present invention relates to nonlinear dielectric materials. Background technique [0002] A nonlinear dielectric is an insulating medium whose electrical conductivity and / or relative permittivity change with changes in electric field strength. Nonlinear dielectric materials are often used in electrical insulation and products. And existing non-linear dielectric material comprises ceramic base non-linear resistance material, epoxy resin base anti-corona paint (band) and rubber base resistance strain gauge; Ceramic base non-linear resistance material needs through high temperature sintering, and its manufacturing process is complicated; Oxygen resin-based anti-corona paint (belt) and rubber-based strain gauges contain only one functional component, silicon carbide, and the amount of silicon carbide is large, so the non-linear coefficient of resistance of the composite material can be adjusted within a small range, and its Physical-mechanical prope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/06C08K13/02C08K13/04C08K3/34C08K3/22C08K3/24C08K3/04C08K7/06C08K7/24H01B3/44
Inventor 郭文敏李忠华韩宝忠马凤莲冯涛
Owner HARBIN UNIV OF SCI & TECH
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