Piezoelectric element and preparation method thereof

一种压电元件、条件的技术，应用在电气元件、压电/电致伸缩器件的制造/组装、压电/电致伸缩/磁致伸缩器件等方向，达到拓宽应用领域的效果

Active Publication Date: 2011-05-25
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the use of polyacrylonitrile as a piezoelectric element.

Method used

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  • Piezoelectric element and preparation method thereof
  • Piezoelectric element and preparation method thereof
  • Piezoelectric element and preparation method thereof

Examples

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Embodiment Construction

[0014] The piezoelectric element 100 of the embodiment of the present invention and its manufacturing method will be described in detail below with reference to the accompanying drawings.

[0015] see figure 1 , the embodiment of the present invention provides a piezoelectric element 100 , which includes a polymer layer 120 , a first metal layer 110 and a second metal layer 130 . The polymer layer 120 has two opposite surfaces, and the first metal layer 110 and the second metal layer 130 are respectively arranged on the two opposite surfaces of the polymer layer 120 to form a three-layer laminated structure. The material layer 120 is disposed between the first metal layer 110 and the second metal layer 130 .

[0016] The main material of the polymer layer 120 is pyrolytic polyacrylonitrile (PPAN). The pyrolyzed polyacrylonitrile is obtained by heating polyacrylonitrile below 350° C. for a certain period of time. Due to the action of heating, the molecular chains in the poly...

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PUM

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Abstract

The invention relates to a piezoelectric element. The piezoelectric element comprises a polymer layer, a first metal layer and a second metal layer, wherein the polymer layer is made of pyrolytic polyacrylonitrile; the first metal layer is arranged on one surface of the polymer layer; the second metal layer are arranged on the other surface of the polymer layer; and the first metal layer and the second metal layer have different work functions. The invention also relates to a preparation method of the piezoelectric element. The piezoelectric element can be applied to the fields of pressure sensors and the like.

Description

technical field [0001] The invention relates to a piezoelectric element and a preparation method thereof. Background technique [0002] A piezoelectric element is an element that converts pressure into an electrical signal, and includes a piezoelectric material layer and electrode layers located on both sides of the piezoelectric material layer. When a pressure is applied on the surface of the piezoelectric element, corresponding electrical signal output can be detected on the two electrode layers. The piezoelectric material layer is made of materials with piezoelectric effect. The commonly used piezoelectric materials in the prior art are piezoelectric ceramics, such as barium titanate, lead titanate and lead titanate, etc., and piezoelectric polymers. , such as polyvinylidene fluoride, etc. [0003] Polyacrylonitrile (PAN) is obtained by free radical polymerization of monomer acrylonitrile. Polyacrylonitrile is the main raw material for making synthetic fibers, can be u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L41/083H01L41/193H01L41/26H01L41/45
CPCH01L41/193Y10S310/80H01L41/1132H01L41/45Y10T29/42H10N30/302H10N30/857H10N30/098
Inventor 何向明蒲薇华王莉李建军高剑任建国
Owner TSINGHUA UNIV
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