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Interdigitated electrodes piezoelectric fiber composite material and preparation method therefor

A technology of piezoelectric fibers and composite materials, which is applied in the manufacture/assembly of piezoelectric/electrostrictive devices, etc., can solve the problems of low utilization rate of polarization electric field, achieve convenient processing, simple operation, and improve driving deformation. effect of ability

Active Publication Date: 2016-12-07
CENT SOUTH UNIV
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  • Application Information

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Problems solved by technology

[0006] Aiming at the defect in the prior art that the utilization rate of the polarization electric field of the PZT piezoelectric fiber and the high molecular polymer is low in the piezoelectric fiber composite material, the present invention provides a polymer modified by ferroelectric particle doping The interdigitated electrode piezoelectric fiber composite material was prepared by composite packaging, aiming to improve the polarization effect of the piezoelectric fiber composite material

Method used

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  • Interdigitated electrodes piezoelectric fiber composite material and preparation method therefor
  • Interdigitated electrodes piezoelectric fiber composite material and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Step (1): Cut the PZT piezoelectric ceramic block (27*7*0.8mm) by cutting method, and prepare the piezoelectric ceramic fiber array. In the piezoelectric ceramic fiber array, the piezoelectric ceramic fiber width is 250 μm, and the fiber spacing 80μm;

[0060] Step (2):

[0061] Step (2-1): barium titanate modification:

[0062] 10g nano barium titanate particles (particle size is 90~100nm), put into the hydrogen peroxide aqueous solution (30wt%) ultrasonic dispersion, reflux 6 hours at 106 degree centigrade under magnetic sub-stirring, centrifugal separation, dry 12h; The product after drying (hydroxylation treatment The final nano-barium titanate) was then immersed in 0.1mol / L dopamine aqueous solution and stirred at 60 degrees Celsius for 10 hours, then centrifuged and dried for 24 hours to obtain dopamine-modified nano-barium titanate powder (about 9g).

[0063] Step (2-2): modified polymer preparation:

[0064] Then the modified nano-barium titanate obtained in ...

Embodiment 2

[0071] The difference from Example 1 is that the volume fraction of nano barium titanate is 1.12% (based on the volume of the cured product after the modified polymer solution is cured). The performance test can be carried out on the material prepared in this embodiment, and the results are shown in Table 1.

Embodiment 3

[0073] The difference from Example 1 is that the volume fraction of nano barium titanate is 1.68% (based on the volume of the cured product after the modified polymer solution is cured). The performance test can be carried out on the material prepared in this embodiment, and the results are shown in Table 1.

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Abstract

The invention discloses a preparation method for an interdigitated electrodes piezoelectric fiber composite material. The preparation method comprises the steps of cutting a PZT piezoelectric ceramic block by adopting a cutting method to prepare a piezoelectric ceramic fiber array; filling the piezoelectric ceramic fiber array with a dopamine-modified and ferroelectric particle-doped modified polymer as a matrix phase, and performing solidification and compounding to obtain a piezoelectric phase layer; adhering and compounding the upper and lower surfaces of the piezoelectric phase layer with interdigitated electrodes by taking the modified polymer as an adhesive; and performing solidification and polarization processing to prepare the interdigitated electrodes piezoelectric fiber composite material, wherein ferroelectric particles are at least one of barium titanate, lead titanate-lead magnesium niobate and bismuth ferrite, the doping volume percentage of the ferroelectric particles is 0.5-2.5% in a solidified product of the modified polymer, and the volume percentage of piezoelectric ceramic fibers is 75-80% in the interdigitated electrodes piezoelectric fiber composite material. According to the preparation method, a polarization electric field of the prepared material can be controlled by regulating and controlling the doping volume percentage of the ferroelectric particle.

Description

technical field [0001] The invention relates to the technical field of preparation of functional materials, in particular to a preparation method of an interdigitated electrode piezoelectric fiber composite material. Background technique [0002] Piezoelectric composite materials are widely used in many fields such as sensors, brakes, and transducers. Among many piezoelectric composite materials, the 1-3 type piezoelectric composite materials are the most deeply studied and widely used. The 1-3 type piezoelectric composite material is a two-phase piezoelectric composite material composed of one-dimensionally connected piezoelectric phases arranged in parallel in a three-dimensionally connected polymer. Its unidirectional performance is outstanding, and the axial performance of the fibrous functional body is Far greater than the performance in other directions. It has good application prospects in acoustics, medicine, non-destructive detection and civil applications. Its e...

Claims

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Application Information

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IPC IPC(8): H01L41/37
CPCH10N30/092
Inventor 张斗吴明亮陈海燕罗行周科朝
Owner CENT SOUTH UNIV
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