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Novel piezoelectric composite structure

A piezoelectric composite material, a new type of technology, applied in the direction of material selection for piezoelectric devices or electrostrictive devices, device material selection, piezoelectric/electrostrictive/magnetostrictive devices, etc., can solve the material action point Problems such as offset, shape change, connection not passing through the axis, etc., to achieve the effect of increasing stroke and convenient fixing

Inactive Publication Date: 2015-05-06
陈相宁
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Publication number is that the patent of CN200979890Y discloses a kind of piezoelectric ceramics of helical structure (such as figure 1 As shown), the piezoelectric material of this structure has an obvious shortcoming. The extension direction of the material is the axial direction, but the line connecting the highest point and the lowest point does not pass through the axis, so that the extension surface of the piezoelectric ceramic does not Perpendicular to the axis, causing material action points to shift, angular changes in shape, and difficulty in fixing, etc.

Method used

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] In this embodiment, the upper and lower layers of coated metal electrodes are used, and the middle is a three-layer composite structure of piezoelectric ceramics. The shape of the material is an N-type double helix structure. Extended on both sides.

[0023] The piezoelectric composite material includes:

[0024] "Metal electrode layer A" for electrodes and metal negatives;

[0025] "Metal electrode layer B" used as an electrode;

[0026] "Piezoelectric ceramic layer" used to provide piezoelectric effect.

[0027] In addition to being used as an electrode, the "metal electrode layer A" also needs to be used as a metal back sheet. After being energized, its own shape is not easy to change, and the deformation of the "piezoelectric ceramic layer" is poor. Therefore, it is necessary to use a slightly lower ductility or a certain thickness. Metal sheet, such as ...

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Abstract

The invention disclose a novel piezoelectric composite material, and aims at solving the problems that the spiral structural piezoelectric material in the current market is relatively small in deformation after being electrified and the extending direction is outside the axis position. The novel piezoelectric composite structure is characterized of being in a shape of an N type double-spiral structure; the extending direction and the axis direction are consistent after electrifying; a connecting line of the maximum extending position and the minimum extending position passes through an axis; the micro displacement of each layer of piezoelectric ceramic is increased through the double-layer spiral structure, so as to increase the displacement length.

Description

technical field [0001] The invention is a novel piezoelectric composite material, especially a piezoelectric composite material with an N-type double helix structure. The extension path is along the axial direction and passes through the axial center position, which can amplify small displacements and effectively expand the stroke of piezoelectric ceramics. Background technique [0002] Piezoelectric material is a kind of functional ceramic material that can generate electric field due to mechanical deformation, and can also produce mechanical deformation due to electric field. This inherent electromechanical coupling effect makes piezoelectric materials widely used in engineering. into piezoelectric transducers, piezoelectric drivers, sensors, etc. However, under the action of an electric field, the deformation of piezoelectric ceramics is very small, no more than one ten-millionth of its own size. Due to the limited travel, it cannot be used in many fields. At present, pe...

Claims

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Application Information

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IPC IPC(8): H01L41/187H01L41/18
Inventor 陈相宁吴芸
Owner 陈相宁