Piezoelectric ceramics polymer composite materials with high ceramic content and preparation method thereof

A technology of piezoelectric ceramics and composite materials, which is applied in the selection of materials for piezoelectric devices or electrostrictive devices, the manufacture/assembly of piezoelectric/electrostrictive devices, and the selection of device materials, etc., which can solve the problem of poor toughness, etc. problems, to achieve the effect of industrialized production, simple process and low cost

Active Publication Date: 2015-07-22
SUZHOU PANT PIEZOELECTRIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem of poor toughness of the piezoelectric ceramic polymer composite piezoelectric material under the high volume fraction of the ceramic phase body

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] PLZT is prepared by the traditional solid-state method. According to the stoichiometric ratio, piezoelectric ceramic sheets are prepared through mixing, pre-firing, film rolling, punching, debinding, and firing. The ceramic sheets are vibrated and ground in a vibrating mill. , passed through mesh sieves of different meshes to prepare PLZT ceramic powders of different particle sizes for use.

[0027] Mix PVDF and N,N-dimethylacetamide solvent, after the PVDF is completely dissolved, add 300~350 mesh PLZT ceramic powder, stir with electric power, rotate and evaporate to the required viscosity, then pour it into the self-made casting device, scrape A film with a thickness of 0.2-0.4 mm is obtained by flat drying, and a 80-mesh PVDF screen film is sandwiched between two layers of film stacks, and hot-pressed on a flat vulcanizing machine to prepare a composite film. It is a 0.4~0.6mm circular piezoelectric composite sheet. The upper and lower sides of the piezoelectric com...

Embodiment 2

[0029] PLZT is prepared by the traditional solid-state method. According to the stoichiometric ratio, piezoelectric ceramic sheets are prepared through mixing, pre-firing, film rolling, punching, debinding, and firing. The ceramic sheets are vibrated and ground in a vibrating mill. , passed through mesh sieves of different meshes to prepare PLZT ceramic powders of different particle sizes for use.

[0030] Mix PVDF and N,N-dimethylacetamide solvent, after the PVDF is completely dissolved, add 300~350 mesh PLZT ceramic powder, electric stirring, rotary evaporation to the required viscosity, then pour into the self-made casting device, the device Place an 80-mesh PVDF screen at the bottom, and scrape and dry to obtain a film with a thickness of 0.2-0.4 mm. The film is hot-pressed on a flat vulcanizer to prepare a composite film. The composite film is punched to make a diameter of 8.9 mm and a thickness of 0.2 mm. ~0.4mm circular piezoelectric composite sheet. The upper and lowe...

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Abstract

The invention provides a preparation method of the piezoelectric ceramics polymer composite materials. The method includes: preparing the piezoelectric ceramics polymer composite membrane through curtain coating-hot pressing or dry pressing-hot pressing firstly, conducting the intersecting lamination hot pressing on one layer or multiple layers of composite membranes and polymer silk screen membranes to form the piezoelectric ceramics polymer composite materials; or preparing the piezoelectric ceramics polymer composite materials through hot pressing after the curtain coating is conducted on the piezoelectric composite membrane directly on the polymer silk screen membrane through the curtain coating method. The piezoelectric ceramics polymer composite material with the high ceramic content is simple in technology, low in cost, capable of preparing the piezoelectric composite membrane with the excellent comprehensive performance and large size, applicable to the piezoelectric touchpad, and capable of realizing industrialization.

Description

technical field [0001] The invention belongs to the category of piezoelectric ceramic polymer composite materials, and provides a preparation method of piezoelectric ceramic polymer composite materials, which solves the problem of poor toughness of piezoelectric ceramic polymer composite materials when the ceramic phase volume fraction is too high question. technical background [0002] Piezoelectric ceramic polymer composite material is a new type of material composed of piezoelectric ceramic phase (such as PZT) and polymer (such as PVDF) through a composite process. Piezoelectric ceramic materials have the advantages of excellent piezoelectric performance, low dielectric loss and large electromechanical coupling coefficient, but they are hard and brittle, difficult to form and process, and have poor impact resistance. Although piezoelectric polymers have low density and good flexibility, and can be prepared into large and uniform films, their piezoelectric properties are ...

Claims

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Application Information

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IPC IPC(8): H01L41/18H01L41/37H10N30/85H10N30/092
Inventor 冯玉华范景波李旺
Owner SUZHOU PANT PIEZOELECTRIC TECH
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