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Cross-linked modification method of polymer phase in magnetic-force- electric coupling effect

A technology of polymer and cross-linked polymer is applied in the field of cross-linking modification of polymer phase in the magnetic-mechanical-electric coupling effect, which can solve the problems of low piezoelectric performance and low magneto-electric performance.

Inactive Publication Date: 2005-08-17
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention mainly solves the piezoelectric ceramics and polymer and ferromagnetic material composite materials of existing polymers that can be cross-linked. Low problem, provide a polymer structure modification method, through the cross-linking modification of the polymer in the composite material, improve the stiffness and strength of the polymer in the composite material, thereby reducing the stress loss of the polymer in the composite material , to improve the piezoelectric and magnetoelectric properties of piezoelectric ceramics, polymers and ferromagnetic composites, piezoelectric ceramics and polymer composites

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Mix PZT, Terfenol-D, epoxy resin and maleic anhydride in a volume ratio of 81:6:10:3, cold press molding at room temperature under 5MPa pressure, and cure at a constant temperature of 110°C for 2 hours. After curing, Get the composite material, the piezoelectric constant d of the composite material 33 Can reach 55pC / N, magnetoelectric conversion coefficient αE 33 It is 60mV / cm Oe.

Embodiment 2

[0013] PVDF and PZT were hot-pressed at 170°C at a volume ratio of 30:70, time was 30min, pressure was 10MPa, the thickness of the composite material was 0.2-0.5mm, and the sample was irradiated with an absorbed dose of 200kGy. The piezoelectric constant of the composite material was d 33 Can reach 70pC / N.

Embodiment 3

[0015] Mix PT, PE, Terfenol-D according to the volume ratio of 75:20:5 at 160°C for 15 minutes, the thickness of the composite material is 0.2-0.5mm, and the sample is irradiated with an absorbed dose of 2000kGy. The piezoelectric constant d of the composite material 33 Can reach 48pC / N.

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Abstract

The present invention is method of raising the piezoelectric performance and magnetoelectric performance of composite material with cross-linking polymer. The cross-linking polymer for the composite material may be polyvinylidene fluoride, polyethylene, epoxy resin, phenolic resin, unsaturated polyester resin, rubber or nylon. The present invention features that linear polymer is made to form crosslinked structure chemically or through irradiation. The chemical crosslinking process is to adding crosslinking agent or initiator into the composite material and the composite material is formed through mixing and hot pressing. The irradiating crosslinking process includes mixing the cross-linking polymer with the composition material, cold pressing to form at room temperature, and irradiating for crosslinking the polymer in the composite material.

Description

Technical field: [0001] The invention relates to a method of reducing the stress loss in the magnetic-mechanical-electrical coupling effect by changing the structure of the polymer phase in the magnetic-force-electrical coupling effect, thereby improving the composite material and piezoelectricity of piezoelectric ceramics, polymers and ferromagnetic materials. Piezoelectric and magnetoelectric properties of ceramic and polymer composites, methods to solve the problem that the transfer phase as an inert phase affects the functionality of composite materials. Background technique: [0002] Ferroelectric, ferromagnetic and polymer composite materials not only have the piezoelectric effect of ferroelectric materials and the magnetostrictive effect of ferromagnetic materials, but also have magnetoelectric properties through the magnetic-force-electric coupling of ferroelectric and ferromagnetic phases. Since it is difficult to compound ferroelectric materials and ferromagnetic m...

Claims

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Application Information

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IPC IPC(8): C08J3/24C08K3/24C08L23/06C08L27/16C08L61/06C08L63/00C08L67/06
Inventor 董丽杰熊传溪权红英
Owner WUHAN UNIV OF TECH
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