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Road piezoelectric composite material and preparation method thereof

A piezoelectric composite material, road-use 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 composite materials Reduced piezoelectric and dielectric properties, poor anti-traffic load impact performance, and great impact on the ecological soil environment, etc., to achieve the effect of improving piezoelectric and dielectric properties, improving anti-traffic load impact performance, and simple process

Active Publication Date: 2018-07-27
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The piezoelectric and dielectric properties of traditional piezoelectric ceramics are very good, but its hard and brittle characteristics make it difficult to form, and its resistance to traffic load impact is poor; it is made by adding polymers with good mechanical properties Piezoelectric composite materials, although their hard and brittle characteristics are improved, but the piezoelectric and dielectric properties of the composite material are reduced, and the electrical properties are seriously hindered
In addition, traditional piezoelectric materials have high lead content, which has a great impact on the ecological soil environment

Method used

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  • Road piezoelectric composite material and preparation method thereof
  • Road piezoelectric composite material and preparation method thereof
  • Road piezoelectric composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The road piezoelectric composite material of the present invention is composed of 70g of barium titanate and 32g of polyvinylidene fluoride.

[0032] The melting point Tm of polyvinylidene fluoride is 167°C, and the density ρ is 1.75g / cm 3 , The number average molecular weight of polyvinylidene fluoride is 825,000.

[0033] The preparation method of road piezoelectric composite material of the present invention comprises the following steps:

[0034] 1) Weigh polyvinylidene fluoride and barium titanate;

[0035] 2) Put polyvinylidene fluoride and barium titanate in a magnetic stirrer, add absolute ethanol to the magnetic stirrer, grind for 15 minutes, put them in an oven, and dry at 100°C for 75 minutes to obtain mixed powder;

[0036] 3) Put the mixed powder obtained in step 2) into a hot-pressed abrasive tool, heat it to 175°C and keep it warm for 60 minutes, then apply pressure to the mixed powder and keep the pressure for 30 minutes to obtain a sample;

[0037] ...

Embodiment 2

[0041] The road piezoelectric composite material of the present invention is made up of 75g of barium titanate and 32g of polyvinylidene fluoride;

[0042] The melting point Tm of polyvinylidene fluoride is 167°C, and the density ρ is 1.77g / cm 3 , The number average molecular weight of polyvinylidene fluoride is 825,000.

[0043] The preparation method of road piezoelectric composite material of the present invention comprises the following steps:

[0044] 1) Put the barium titanate in the corundum crucible, then raise the temperature of the corundum crucible to 850°C at a constant rate of 5°C / min; keep it warm for 90 minutes, and then cool down to room temperature;

[0045] 2) weighing polyvinylidene fluoride and the barium titanate obtained in step 1);

[0046] 3) Put polyvinylidene fluoride and barium titanate in a magnetic stirrer, then add absolute ethanol to the magnetic stirrer, grind for 10 minutes, put them in an oven, and dry at 100°C for 60 minutes to obtain mixe...

Embodiment 3

[0052] The road piezoelectric composite material of the present invention consists of 68g of barium titanate and 29g of polyvinylidene fluoride;

[0053] The melting point Tm of polyvinylidene fluoride is 167°C, and the density ρ is 1.76g / cm 3 , The number average molecular weight of polyvinylidene fluoride is 825,000.

[0054] The preparation method of road piezoelectric composite material of the present invention comprises the following steps:

[0055] 1) Put the barium titanate in the corundum crucible, then raise the temperature of the corundum crucible to 950°C at a constant speed of 10°C / min; keep it warm for 75min, and then cool down to room temperature;

[0056] 2) weighing polyvinylidene fluoride and the barium titanate obtained in step 1);

[0057] 3) Put polyvinylidene fluoride and barium titanate in a magnetic stirrer, add absolute ethanol to the magnetic stirrer, grind for 13 minutes, put them in an oven, and dry them at 100°C for 70 minutes to obtain mixed pow...

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Abstract

The invention discloses a road piezoelectric composite material and a preparation method thereof. The road piezoelectric composite material comprises 0.6-0.8 parts of barium titanate and 0.2-0.4 partof polyvinylidene fluoride based on mass. The road piezoelectric composite material has favorable piezoelectric and dielectric properties, is relatively good in traffic load impact resistance, relatively small in influence on soil environment and simple in preparation method.

Description

technical field [0001] The invention belongs to the technical field of research on road materials, and relates to a piezoelectric composite material for roads and a preparation method thereof. Background technique [0002] With the development of society and economy, along with the continuous depletion of non-renewable energy sources, the environmental quality continues to decline. How to efficiently collect clean energy and use it in engineering practice has become the focus of energy harvesting research. As we all know, during the use of the road, it bears hundreds of thousands to millions of vehicle rollings every year, and the vibration energy generated by it is very considerable. The vibration energy of the vehicle will not only cause damage to the road, but also lead to a waste of energy. If the vibration energy is collected and converted into energy available to people, it will not only bring huge economic and environmental benefits, but also reduce the vibration and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L41/18H01L41/187H01L41/193H01L41/37E01C9/00H10N30/85H10N30/092H10N30/853H10N30/857
CPCE01C9/00H10N30/8536H10N30/852H10N30/857H10N30/092
Inventor 裴建中任鑫赵振华李蕊张久鹏蔡军王彦淞刘卧龙刘涛
Owner CHANGAN UNIV
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