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A barium titanate/rubber piezoelectric composite material for low-frequency sound absorption and its preparation method

A piezoelectric composite material, barium titanate technology, applied in the direction of material selection for piezoelectric devices or electrostrictive devices, manufacturing/assembly of piezoelectric/electrostrictive devices, device material selection, etc., can solve the problem of low frequency. Problems such as poor sound absorption, low intensity, and narrow sound absorption frequency range achieve the effect of wide damping temperature range and high storage modulus

Inactive Publication Date: 2018-11-06
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional sound-absorbing materials mainly include foam, fiber, resonance and composite materials. Fiber materials are good at mid-high frequency sound absorption, but poor at low-frequency sound absorption; foam materials such as polyurethane have poor low-frequency sound absorption and low strength. ; Resonant materials require special structures, the sound absorption frequency range is narrow, the limitations are large, and the material thickness is large; while composite materials are easy to process and modify, and can meet different use environments

Method used

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  • A barium titanate/rubber piezoelectric composite material for low-frequency sound absorption and its preparation method
  • A barium titanate/rubber piezoelectric composite material for low-frequency sound absorption and its preparation method
  • A barium titanate/rubber piezoelectric composite material for low-frequency sound absorption and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0023] A barium titanate / rubber piezoelectric composite material for low-frequency sound absorption, prepared by the following method:

[0024] (1) Pretreatment of barium titanate ceramic powder: put the barium titanate ceramic powder into a ball mill for ball milling for 5 minutes; use a silane coupling agent as a modifier, and the dosage is 2% of the mass of the barium titanate ceramic powder; The ball-milled barium titanate ceramic powder and modifying reagent were placed in a high-speed mixer, and stirred at a high speed of 1200r / min for 20min to obtain the pretreated barium titanate ceramic powder, which was dried for later use;

[0025] (2) Weigh the rubber matrix raw material according to the following formula: 100 parts by weight of nitrile rubber, 4 parts by weight of ZnO, 1 part by weight of zinc stearate, 1 part by weight of stearic acid, 0.8 parts by weight of antioxidant 4010, and 1 part by weight of sulfur , accelerator DM 0.8 weight portion, accelerator CZ 0.8 w...

Embodiment 2

[0029] A barium titanate / rubber piezoelectric composite material for low-frequency sound absorption, prepared by the following method:

[0030] (1) Barium titanate ceramic powder pretreatment: put the barium titanate ceramic powder into a ball mill for ball milling for 8 minutes; use a silane coupling agent as a modifier, and the dosage is 3% of the mass of the barium titanate ceramic powder; The ball-milled barium titanate ceramic powder and modifying reagent were placed in a high-speed mixer, and stirred at a high speed of 1300r / min for 25min to obtain the pretreated barium titanate ceramic powder, which was dried for later use;

[0031] (2) Weigh the rubber matrix raw material according to the following formula: 100 parts by weight of nitrile rubber, 4 parts by weight of ZnO, 1 part by weight of zinc stearate, 1 part by weight of stearic acid, 0.8 parts by weight of antioxidant 4010, and 1 part by weight of sulfur , accelerator DM 0.8 weight portion, accelerator CZ 0.8 weig...

Embodiment 3

[0035] A barium titanate / rubber piezoelectric composite material for low-frequency sound absorption, prepared by the following method:

[0036] (1) Pretreatment of barium titanate ceramic powder: put the barium titanate ceramic powder into a ball mill for ball milling for 10 minutes; use a silane coupling agent as a modifier, and the dosage is 5% of the mass of the barium titanate ceramic powder; The ball-milled barium titanate ceramic powder and modifying reagent were placed in a high-speed mixer, and stirred at a high speed of 1400r / min for 20min to obtain the pretreated barium titanate ceramic powder, which was dried for later use;

[0037] (2) Weigh the rubber matrix raw material according to the following formula: 100 parts by weight of nitrile rubber, 4 parts by weight of ZnO, 1 part by weight of zinc stearate, 1 part by weight of stearic acid, 0.8 parts by weight of antioxidant 4010, and 1 part by weight of sulfur , accelerator DM 0.8 weight part, accelerator CZ 0.8 wei...

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Abstract

The invention belongs to the field of low-frequency sound-absorbing materials, and in particular relates to a barium titanate / rubber piezoelectric composite material for low-frequency sound absorption and a preparation method thereof. In the present invention, the barium titanate ceramic powder is first pretreated, and then the piezoelectric ceramic is used as the functional phase, the conductive carbon black is used as the conductive phase, and the nitrile rubber is used as the matrix, and the principle of combining the piezoelectric effect and the volume effect is used to prepare the Barium titanate / rubber piezoelectric composite material for low-frequency sound absorption, the damping temperature range of the barium titanate / rubber piezoelectric composite material is wider, and the storage modulus is higher; based on the principle of piezoelectric effect and volume effect, the The above-mentioned barium titanate / rubber piezoelectric composite material can obtain better low-frequency sound absorption effect under the condition of smaller thickness.

Description

technical field [0001] The invention belongs to the field of low-frequency sound-absorbing materials, and in particular relates to a barium titanate / rubber piezoelectric composite material for low-frequency sound absorption and a preparation method thereof. Background technique [0002] The development of modern industry has made the noise problem more and more serious. Long-term exposure to noise will have adverse effects on the body, and will also affect the vision, respiratory system, human immune system and fetal development. The research and preparation of sound-absorbing and vibration-damping materials is particularly important. Traditional sound-absorbing materials mainly include foam, fiber, resonance and composite materials. Fiber materials are good at mid-high frequency sound absorption, but poor at low-frequency sound absorption; foam materials such as polyurethane have poor low-frequency sound absorption and low strength. ; Resonant materials require a special st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/02C08K13/06C08K9/06C08K3/22C08K5/098C08K5/09C08K3/04C08K3/24H01L41/18H01L41/37H10N30/092H10N30/85
CPCC08K3/04C08K3/22C08K3/24C08K5/09C08K5/098C08K9/06C08K13/06C08L2203/20C08K2201/001C08K2003/2296H10N30/852H10N30/092C08L9/02
Inventor 江学良姚楚杨振
Owner WUHAN INSTITUTE OF TECHNOLOGY
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