1-3 composite piezoelectric fiber/polymer composite damping material and preparation method thereof

A composite damping material, piezoelectric fiber technology, applied in the manufacture/assembly of piezoelectric/electrostrictive devices, material selection for piezoelectric devices or electrostrictive devices, device material selection, etc. , adapt to the problems of poor surface performance, etc., to achieve the effect of improving the damping factor and the damping effect is obvious

Inactive Publication Date: 2011-08-24
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Most of the research on piezoelectric damping takes piezoelectric ceramics as the research object, but using piezoelectric ceramics as a damper has obvious disadvantages: first, it is fragile and requires special attention during operation and bonding; second, the performance of conforming to curved surfaces is very poor. Poor, requires special treatment of curved surfaces

Method used

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  • 1-3 composite piezoelectric fiber/polymer composite damping material and preparation method thereof
  • 1-3 composite piezoelectric fiber/polymer composite damping material and preparation method thereof
  • 1-3 composite piezoelectric fiber/polymer composite damping material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Such as figure 1 The shown 1-3 composite piezoelectric fiber / polymer composite damping material includes several PZT piezoelectric fibers 1 that are polarized along the length direction and a polymer layer 2 that is coated on the piezoelectric fiber. Both ends of the PZT piezoelectric fiber 1 are bonded with organic conductive silver paste 3 , and electrodes 4 are led out through organic conductive silver paste 3 . Wherein, each polarized PZT piezoelectric fiber is directly polarized by applying voltage at both ends or is obtained by segmentally applying voltage to the PZT piezoelectric fiber; the thickness of the polymer layer 2 is the same as that of the piezoelectric fiber 1 diameter is equivalent.

[0047] A damping system comprising such as figure 1 Shown 1-3 composite piezoelectric fiber / polymer composite damping material and the external resistance that is connected with the lead-out electrode 4 of described composite damping material; The resistance value of...

Embodiment 2

[0052] Preparation of 1-3 composite piezoelectric fiber / polymer composite damping strips and damping system: 1) The PZT-5H2 piezoelectric fiber with a diameter of 0.8mm and a length of 30mm is polarized along the length direction, and the polarization along the length direction It is obtained by directly polarizing the two ends of the PZT piezoelectric fiber with a voltage, where the polarization electric field is 500V / mm, and the piezoelectric coefficient d 33 It is 370pC / N.

[0053] 2) Arrange the 8 polarized piezoelectric fibers tightly in a row, then bond the electrodes at both ends of the piezoelectric fibers together with organic conductive silver paste, and lead out the electrodes with wires;

[0054] Choose 8 polarized piezoelectric fibers closely arranged in 30×10×2mm 3 In the mould, the electrodes at both ends are bonded together with organic conductive silver paste, and the electrodes are drawn out with wires. Pouring with epoxy resin, wrapping piezoelectric fiber...

Embodiment 3

[0058] Preparation of 1-3 composite piezoelectric fiber / polymer composite damping strips and damping system: 1) The PZT-5H2 piezoelectric fiber with a diameter of 0.1mm and a length of 150mm is polarized along the length direction, and the polarization along the length direction It is obtained by directly polarizing the two ends of the PZT piezoelectric fiber with a voltage, where the polarization electric field is 500V / mm, and the piezoelectric coefficient d 33 It is 370pC / N.

[0059] 2) Arrange 15 polarized piezoelectric fibers closely in a row, then bond the electrodes at both ends of the piezoelectric fibers together with organic conductive silver paste, and lead out the electrodes with wires;

[0060] Choose 15 polarized piezoelectric fibers closely arranged in 150×2×0.3mm 3 In the mould, the electrodes at both ends are bonded together with organic conductive silver paste, and the electrodes are drawn out with wires. Pouring with epoxy resin, wrapping the piezoelectric ...

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Abstract

The invention relates to a 1-3 composite PZT (piezoelectric) fiber/polymer composite damping material and a preparation method thereof, belonging to the field of composite materials. The composite damping material comprises a plurality of PZT fibers polarized along the length direction and a polymer layer coated outside the PZT fibers, and two ends of each PZT fiber are connected with an externalresistor via electrodes led out of the two ends; and the resistance of external resistor is determined according to the formula (I). The PZT property can be obtained by adopting the polarization method along the length direction of the PZT fibers, the external matching resistor is connected in the way of leading out the electrodes via organic conductive silver paste, under the condition that the damping property of the composite damping material is matched with external impedance, the damping factor can be improved by 0.1; under the condition of increasing the applied force, the damping factor can be improved; the greater the storage modulus difference between an organic matter matrix and the PZT fibers is, the more obvious the damping effect is; and the composite damping material can be used as a vibration-damping and noise-reducing material to be applied in the fields of trains, vehicles and the like.

Description

technical field [0001] The invention relates to a 1-3 composite PZT piezoelectric fiber / polymer composite damping material and a preparation method thereof, which can be applied to vibration and noise reduction of trains, automobiles, etc., and belongs to the field of composite materials. Background technique [0002] China's railway construction has gone through six speed increases. Now the EMUs with a speed of 200 kilometers per hour and above are put into use in the sixth large-scale speed increase of the national railway. The speed is as high as 380Km / h. With the high-speed rail traffic, the vibration and noise caused by train operation will become more severe. High-speed rail transit lines pass through many cities. The vibration and noise not only bring discomfort to the passengers in the carriages, but also seriously interfere with the normal life of residents along the line, and even affect the normal operation of nearby schools, research institutes, hospitals, banks...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L41/18H01L41/22C04B41/83H01L41/45
Inventor 王旭升武传贵洪暄清李祥明陈锐李艳霞姚曼文杨同青于剑姚熹
Owner TONGJI UNIV
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