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Preparation method of piezoelectric ceramic polymer composite material

A technology of piezoelectric ceramics and composite materials, applied in the manufacture/assembly of piezoelectric/electrostrictive devices, etc., can solve the problems of poor toughness of piezoelectric materials, achieve the effects of improving flexibility, simple preparation process, and low cost

Inactive Publication Date: 2016-07-20
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned technologies and provide a method for preparing a piezoelectric ceramic polymer composite piezoelectric material, which uses two piezoelectric material layers to sandwich a conductive polymer layer in the middle to form an integrated structure by hot pressing , to solve the problem of poor toughness of piezoelectric ceramic polymer composite piezoelectric materials under high volume fraction of ceramic phase

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Mix the organic polymer PVDF and the organic solvent N,N-dimethylacetamide with a mass ratio of 1:10, and then add 2-3um conductive lanthanum nickelate particles with a mass ratio of 60% after mixing evenly, and fully mix and stir After that, it is poured into a casting device, scraped and dried to obtain a film with a thickness of 0.1-0.2mm, and the film is hot-pressed at 160°C for 24 hours on a flat vulcanizer to prepare a conductive particle polymer composite material.

[0021] (2) Mix the organic polymer PVDF and the organic solvent N,N-dimethylacetamide in a mass ratio of 1:10. After mixing evenly, add lanthanum lead zirconate titanate ceramic powder with a mass ratio of 60% and 300 mesh, and pour it after electric stirring. Put it into the casting device, scrape and dry to make a film with a thickness of 0.2-0.4mm, and the film is hot-pressed at 160°C for 24 hours on a flat vulcanizer to prepare a 0-3 type piezoelectric ceramic polymer piezoelectric composite m...

Embodiment 2

[0024] (1) Mix the organic polymer PVDF and the organic solvent N,N-dimethylacetamide at a mass ratio of 1:10. After mixing evenly, add 3-4um conductive lanthanum nickelate particles at a mass ratio of 70%. After fully mixing and stirring Pour it into a flow casting device, scrape and dry it to obtain a film with a thickness of 0.2-0.3mm, and heat the film on a flat vulcanizer at 170°C for 24 hours to prepare a conductive particle polymer material.

[0025] (2) Mix the organic polymer PVDF and the organic solvent N,N-dimethylacetamide in a mass ratio of 1:10. After mixing evenly, add a mass ratio of 70% and 200 mesh lead lanthanum zirconate titanate ceramic powder, and pour it after electric stirring Put it into a flow casting device, scrape and dry to make a film with a thickness of 0.1-0.3mm, and the film is hot-pressed at 170°C for 24 hours on a flat vulcanizer to prepare a 0-3 type piezoelectric ceramic polymer piezoelectric material.

[0026] (3) A layer of conductive par...

Embodiment 3

[0028] (1) Mix the organic polymer PVDF and the organic solvent N,N-dimethylacetamide at a mass ratio of 1:10. After mixing evenly, add conductive lanthanum nickelate particles with a mass ratio of 50% 4-5um, and fully mix and stir After that, it is poured into a flow casting device, scraped and dried to obtain a film with a thickness of 0.4-0.5mm, and the film is hot-pressed at 150°C for 24 hours on a flat vulcanizer to prepare a conductive particle polymer material.

[0029] (2) Mix the organic polymer PVDF and the organic solvent N,N-dimethylacetamide in a mass ratio of 1:10. After mixing evenly, add 50% lead lanthanum zirconate titanate ceramic powder with a mass ratio of 500 mesh, and pour it after electric stirring. Put it into the casting device, scrape and dry to make a film with a thickness of 0.6-0.9mm, and the film is hot-pressed at 150°C for 24 hours on a flat vulcanizer to prepare a 0-3 type piezoelectric ceramic polymer piezoelectric composite material.

[0030] ...

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Abstract

The invention relates to a piezoelectric ceramic polymer composite material, especially a preparation method of the piezoelectric ceramic polymer composite material. A conductive polymer layer is clamped between two piezoelectric material layers, and the piezoelectric ceramic polymer composite material of the integrated structure is formed via hot pressing. The conductive polymer layer is of a conductive particle polymer composite material, the piezoelectric material layer is of a 0-3 type piezoelectric ceramic polymer composite material, and the conductive polymer layer improves the flexibility of the 0-3 type composite material while having no influence on the piezoelectric performance of the 0-3 type composite material. The piezoelectric ceramic polymer composite material is simple in preparation technology, low in cost and high in comprehensive performance, can be used to prepare large-size piezoelectric composite films, and can be applied to a piezoelectric touch control plate and realize industrial production.

Description

technical field [0001] The invention relates to a piezoelectric ceramic polymer composite material, in particular to a preparation method of a piezoelectric ceramic polymer composite material. Background technique [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 poor. In the current piezoelectric composite material system, the piezoelectric particles in the 0-3 type piezoelectric composite material are filled with organic poly...

Claims

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Application Information

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IPC IPC(8): H01L41/37H10N30/092
CPCH10N30/092
Inventor 沈湘黔李旺冯玉华范景波
Owner JIANGSU UNIV
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