Low-frequency high-damping rubber-based piezoelectric composite material and preparation method thereof

A piezoelectric composite material and rubber-based technology, applied in the field of damping materials, can solve the problems of high volume fraction of piezoelectric ceramic powder, high material hardness, limited application range, etc., and achieve the effect of improving the damping factor

Active Publication Date: 2012-07-18
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the volume fraction of piezoelectric ceramic powder contained in this material is too high, and the material hardness is too high, which limits its application range.
[0004] Few of the reported piezoelectric composite materials involve their damping properties and their applications in the field of vibration and noise reduction.

Method used

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  • Low-frequency high-damping rubber-based piezoelectric composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment

[0024] Using non-diene rubber as matrix material, PZT piezoelectric ceramic powder, conductive carbon black and coupling agent were added to prepare rubber-based piezoelectric damping composite material. Weigh the mixed powder of rubber base material, piezoelectric ceramic powder, conductive carbon black and titanate coupling agent according to the formula ratio in Table 1, knead on the internal mixer, and after mixing evenly, take out the sheet, cut it, and put it into the Mold, formed on a thermoforming machine. The molding temperature (upper and lower molds) is 160°C, the molding pressure is 5MPa, and the molding time is 50min. The molded piezoelectric damping composite material was polarized in a high-voltage DC oil bath polarization device with a polarization voltage of 4000V, a polarization temperature of 80°C, and a polarization time of 15 minutes.

[0025]

[0026] Table 1 Example 1-4 formula (mass parts)

[0027] Raw material name Example 1 Example 2 ...

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Abstract

The invention discloses a low-frequency high-damping rubber-based piezoelectric composite material and a preparation method thereof. The composite material is a complex formed by mixing a rubber base material consisting of 100 parts of non-diene rubber, 1.0 to 1.5 parts of vulcanizing agent and 4.0 to 5.0 parts of vulcanizing accelerator, 100 to 500 parts of piezoelectric ceramic powder, 0.1 to 0.5 part of conductive carbon black and 0.5 to 5.0 parts of coupling agent, vulcanizing, polarizing and the like. A novel damping material which has a high damping factor (tan delta is more than or equal to 0.3) at low frequency (1 to 300Hz) can be obtained, an obvious piezoelectric synergistic effect is achieved, and the damping factor (tan delta is more than or equal to 0.2) of the polarized material is obviously improved compared with that of the unpolarized material.

Description

technical field [0001] The invention relates to a technology in the field of damping materials, in particular to a low-frequency high-damping rubber-based piezoelectric composite material and a preparation method thereof. Background technique [0002] Damping material is a new type of functional material that can absorb vibration mechanical energy and convert it into heat energy and dissipate it. It uses the principle of damping material to convert kinetic energy into heat energy during deformation to reduce the resonance amplitude of the structure, increase the fatigue life and reduce the structure. noise. Various types of damping materials have been successfully applied in many fields, among which rubber-based vibration-damping materials are gaining more and more attention due to their excellent performance. However, due to the inherent properties of the viscoelastic damping material itself, its damping performance is significantly affected by the ambient temperature and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/22C08L23/16C08K13/06C08K9/06C08K9/04C08K3/24C08K3/04C08K3/06B29C43/00B29C71/00B29B7/00
Inventor 王雯霏梁磊韦璇
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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