A kind of multi-phase high dielectric constant composite material with isolation structure and its preparation method

Abstract

The invention discloses a multi-phase high-dielectric-constant composite material with an isolation structure and a preparation method thereof. The material is prepared from, by mass, 0-10 parts of conducting packing, 10-50 parts of thermoplastic resin, 0-1 parts of an accelerant, 0-20 parts of a modifying agent, 0-20 parts of isolation balls, 50-100 parts of a curing agent and 100 parts of epoxy resin. By virtue of a suitable solvent and by means of a solution blending method, the modifying agent, the conducting packing, the thermoplastic resin and the epoxy resin are mixed to be uniform, the curing agent is added, the materials are mixed to be uniform, the mixture is poured into a mold and smeared into an electrode plate, heating is conducted for curing, and then the high-dielectric-constant multipolymer-based composite material with the isolation structure can be obtained. The block-shaped and film-shaped composite material can achieve the high dielectric constant and the low dielectric loss when the content of the conducting packing is low, is simple in preparation technology, easy to mold and process and short in molding period and has a very wide application prospect in the micro-electronics field and the motor and cable industries.

Description

technical field [0001] The invention belongs to the field of dielectric materials, and in particular relates to a multiphase high dielectric constant composite material with an isolation structure and a preparation method thereof. Background technique [0002] Polymer-based composite materials with high dielectric constant have very good performance in storing electric energy and uniform electric field, plus good mechanical properties and low cost, so they have very broad application prospects in the field of microelectronics, motor and cable industries . [0003] At present, there are two main ways to improve the dielectric constant of composite materials: one is to add ceramic fillers to the polymer matrix; the other is to compound the polymer matrix with conductive fillers, and use conductive particles to percolate in the insulating matrix. The percolation effect at the transition to increase the dielectric constant of the polymer matrix. Usually when the filling amount...

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Problems solved by technology

Usually when the filling amount of ceramic particles is about 60vol.%, the composite material can obtain a higher dielectric constant, and such a high filling amount will cause a large number of pores and defects in the composite material, and the mechanical properties will be reduced, which limits their use in Practical Applications in Dielectric Materials for Embedded Capacitors

Patent CN201210145040.6 discloses a three-phase composite material containing modified graphene with high dielectric constant and its preparation method. The composite material is prepared from polyvinylidene fluoride, barium titanate particles and polyaniline modified graphene particles , but the highest dielectric constant of the composite material is also less than 200, and the preparation method takes a long time to prepare

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