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A kind of short fiber piezoelectric composite material and its preparation method

A piezoelectric composite material, piezoelectric composite technology, applied in the direction of material selection for piezoelectric devices or electrostrictive devices, manufacturing/assembly of piezoelectric/electrostrictive devices, device material selection, etc., can solve the problem of pressure Electric fiber is prone to problems such as polarization dead zone, and achieves the effect of precise and controllable structure size, complete and uniform polarization, and low requirements

Active Publication Date: 2020-02-04
HUBEI ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a short-fiber piezoelectric composite material, aiming to improve the problem that the piezoelectric fiber is prone to polarization dead zone in the polarization process

Method used

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  • A kind of short fiber piezoelectric composite material and its preparation method
  • A kind of short fiber piezoelectric composite material and its preparation method
  • A kind of short fiber piezoelectric composite material and its preparation method

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preparation example Construction

[0034] Please refer to figure 2 and image 3 , the embodiment of the present invention also provides a method for preparing a short-fiber piezoelectric composite material, comprising the following steps:

[0035] S1. A piezoelectric composite structure 5 is obtained by alternately stacking multiple piezoelectric thin layers 11 and multiple polymer thin layers 22 , and each polymer thin layer 22 is connected to a piezoelectric thin layer 11 on both sides.

[0036] For the convenience of subsequent description, the length direction along the plane where the piezoelectric thin layer 11 is located is defined as the first direction, and the width direction along the plane where the piezoelectric thin layer 11 is located is defined as the second direction.

[0037] Specifically, a plurality of piezoelectric thin layers 11 and a plurality of polymer thin layers 22 are spliced ​​alternately, and the piezoelectric thin layers 11 are located on the top and bottom of the piezoelectric ...

Embodiment 1

[0051] This embodiment also provides a method for preparing a short-fiber piezoelectric composite material. PZT is used as the piezoelectric phase and epoxy resin is used as the polymer phase. The method of the present invention is used to prepare the short-fiber-reinforced piezoelectric composite material. The specific process is as follows:

[0052] 1. Using PZT ceramics and epoxy resin as raw materials, the lamination-cutting method is used to prepare such as figure 2 The piezoelectric composite structure 5 shown in the above, wherein the number of piezoelectric thin layers 11 is 11, and the thickness is 0.3 mm; the number of polymer thin layers 22 is 10, and the thickness is 0.2 mm; the thickness of the piezoelectric composite structure 5 is The sum of the thicknesses of the electric thin layer 11 and the polymer thin layer 22 is 5.3 mm; the length and width of the piezoelectric fiber composite structure 5 and the piezoelectric thin layer 11 and the polymer thin layer 22 a...

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Abstract

The invention discloses a short fiber piezoelectric composite material and a preparation method thereof, and relates to the technical field of material preparation. The short-fiber piezoelectric composite material includes flexible interdigital electrodes and a piezoelectric fiber composite layer located between the upper and lower electrodes of the flexible interdigital electrodes, and the piezoelectric fiber composite layer includes a plurality of short-fiber piezoelectric composite units spliced ​​sequentially along the axial direction , each short-fiber piezoelectric composite unit includes a plurality of polarized short piezoelectric fibers and a plurality of polymer fibers, and the two sides of each polymer fiber are respectively connected with a polarized short piezoelectric fiber. The polarization is completed before packaging, and the polarization is complete and uniform without the problem of polarization "dead zone". The preparation method of the short-fiber piezoelectric composite material is to prepare the above-mentioned short-fiber piezoelectric composite material, the structural size of the composite material is accurately and controllable, and it is easy to realize the serialization and batch production of the structure and performance of the piezoelectric fiber composite material.

Description

technical field [0001] The invention relates to the technical field of material preparation, and in particular to a short fiber piezoelectric composite material and a preparation method thereof. Background technique [0002] Piezoelectric composite materials are a kind of functional composite materials based on the mutual coupling between electrical energy and mechanical energy. According to the different composite principles and structures, there are many types. Piezoelectric fiber composite materials are composed of piezoelectric fibers and polymer fibers. Combining the excellent piezoelectric properties of piezoelectric crystal materials and the flexibility of polymer fibers, it overcomes the shortcomings of high brittleness and poor flexibility of piezoelectric crystal materials, and has the characteristics of outstanding unidirectional performance and excellent designability. It is widely used in many fields such as sensing, actuation, structural control, structural hea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L41/18H01L41/187H01L41/193H01L41/37H10N30/85H10N30/092H10N30/853H10N30/857
CPCH10N30/852H10N30/853H10N30/857H10N30/092
Inventor 杨雄王锋付争兵丁瑜杜军
Owner HUBEI ENG UNIV
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