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A kind of interdigitated electrode piezoelectric fiber composite material and its preparation method

A piezoelectric fiber and composite material technology, which is applied in the manufacture/assembly of piezoelectric/electrostrictive devices, etc., can solve the problem of low utilization rate of polarized electric field, achieve convenient processing, widen application range, and improve driving deformation. effect of ability

Active Publication Date: 2018-05-25
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • 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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  • A kind of interdigitated electrode piezoelectric fiber composite material and its preparation method
  • A kind of interdigitated electrode piezoelectric fiber composite material and its preparation method

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 of an interdigitated electrode piezoelectric fiber composite material, which uses a cutting method to cut a PZT piezoelectric ceramic block to prepare a piezoelectric ceramic fiber array; a modified polymerization method doped with dopamine-modified ferroelectric particles The matrix phase is filled into the piezoelectric ceramic fiber array and solidified and compounded to obtain a piezoelectric phase layer; then the modified polymer is used as a binder to bond the upper and lower sides of the piezoelectric phase layer The interdigitated electrode piezoelectric fiber composite material is obtained through solidification and polarization treatment; wherein, the ferroelectric particles are barium titanate, lead titanate-lead magnesium niobate , at least one of bismuth ferrite; in the cured product of the modified polymer, the doping volume percentage of ferroelectric particles is 0.5-2.5%; in the interdigitated electrode piezoelectric fiber composite material, The volume fraction of the piezoelectric ceramic fiber is 75-80%. The present invention can also control the polarization electric field of the prepared material by adjusting the doped volume fraction of ferroelectric particles.

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 other direction performance. It has good application prospects in acoustics, medicine, non-destructive detection and civil applications. Its excellent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L41/37H10N30/092
CPCH10N30/092
Inventor 张斗吴明亮陈海燕罗行周科朝
Owner CENT SOUTH UNIV