Transverse gradient chopped fiber piezoelectric composite material and preparation method thereof

A piezoelectric composite material and piezoelectric composite technology are 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. Problems such as the dead zone of electrical fiber polarization, to achieve the effect of precise and controllable structure size, low requirements, and simple and easy process

Active Publication Date: 2017-12-26
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 transversely gradient short-fiber piezoelectric composite material, aiming to improve the problem that piezoelectric fibers are prone to polarization dead zones during the polarization process, and at the same time enhance the adaptability to non-planar structures

Method used

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  • Transverse gradient chopped fiber piezoelectric composite material and preparation method thereof
  • Transverse gradient chopped fiber piezoelectric composite material and preparation method thereof
  • Transverse gradient chopped fiber piezoelectric composite material and preparation method thereof

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preparation example Construction

[0038] Please refer to figure 2 with image 3 , the embodiment of the present invention also provides a method for preparing a transverse gradient short fiber piezoelectric composite material, comprising the following steps:

[0039] S1. Alternately stacking multiple piezoelectric thin layers 11 and multiple polymer thin layers 22 to obtain a piezoelectric composite structure 5. Both sides of each polymer thin layer 22 are respectively connected to a piezoelectric thin layer 11, and multiple The width of the piezoelectric thin layer 11 changes in a gradient.

[0040] 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.

[0041] Specifically, a plurality of piezoelectric thin layers 11 and a plurality of polymer thin layers 22 are spliced ...

Embodiment 1

[0055] This embodiment provides a method for preparing a transversely gradient 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 transversely gradient short fiber reinforced piezoelectric composite material. The specific process as follows:

[0056] 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 9, the initial thickness of piezoelectric thin layers 11 is 0.2 mm, and the thickness increment is 0.05 mm; the number of polymer thin layers 22 is 8, and the thickness is 0.2 mm; the thickness of the piezoelectric composite structure 5 is the sum of the thicknesses of all piezoelectric thin layers 11 and polymer thin layers 22, which is 5.2 mm; the thickness of...

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Abstract

The invention discloses a transverse gradient chopped fiber piezoelectric composite material and a preparation method thereof, and relates to the technical field of material preparation. The transverse gradient chopped fiber piezoelectric composite material comprises an interdigital electrode and a piezoelectric fiber composite layer, the piezoelectric fiber composite layer is positioned between an upper electrode and a lower electrode of the interdigital electrode and comprises a plurality of chopped fiber piezoelectric composite units which are sequentially connected along an axial direction, each chopped fiber piezoelectric composite unit comprises a plurality of polarized short piezoelectric fibers and a plurality of polymer fibers, the widths of the polarized short piezoelectric fibers in the splicing direction are changed in a gradient manner, the polarized short piezoelectric fibers are completely and uniformly polarized before package, the problem of polarized 'dead space' is solved, and the adaptability of material to a non-planar structure is enhanced. The transverse gradient chopped fiber piezoelectric composite material prepared by the method is accurate and controllable in structure size, and structure and the performance serialized and batch preparation of the piezoelectric fiber composite material is easily achieved.

Description

technical field [0001] The invention relates to the technical field of material preparation, and in particular to a transverse gradient 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 performance 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 co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L41/18H01L41/193H01L41/08H01L41/37H01L41/338H01L41/257
CPCH10N30/1061H10N30/852H10N30/045H10N30/088H10N30/857H10N30/092
Inventor 杨雄王锋付争兵丁瑜杜军
Owner HUBEI ENG UNIV
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