Polyolefin based non-linear dielectric material

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...