A composite piezoelectric material prepared from piezoceramic powder, carbon black and asphalt and a preparing method thereof

Abstract

A composite piezoelectric material prepared from piezoceramic powder, carbon black and asphalt and a preparing method thereof are provided. The composite piezoelectric material is prepared from 25-60 parts by weight of the asphalt, 2-5 parts by weight of the carbon black, 320-630 parts by weight of the piezoceramic powder and 1-10 parts by weight of an asphalt modifier. The problems of interfacial compatibility and difficult polarization processes are overcome. The composite piezoelectric material can provide electricity for monitoring systems, can be used as sensors, and is good in compatibility with road surfaces. Natural asphalt and petroleum asphalt have good compatibility and durable ageing resistance, thus largely improving pavement performance of the substrate asphalt. The piezoceramic-carbon black-asphalt composite material improves interfacial compatibility of the piezoceramic and the asphalt, reduces the polarization voltage of the composite piezoelectric material, and improves piezoceramic properties of the composite piezoelectric material.

Description

technical field [0001] The invention relates to a composite piezoelectric material. The invention also relates to a preparation method of the composite piezoelectric material. Background technique [0002] China's highway system is gradually developing in the direction of informationization, technology and greening. While paying attention to the high-speed development of highways, more attention should be paid to the quality of highways and future maintenance work. With the increase in the functional requirements of road surfaces and the demand for long-term durability evaluation, it is necessary to monitor their health. However, existing sensors and The compatibility of the road surface is not good, not only it is easy to cause damage to the road surface and sensors, but also cannot accurately reflect the internal health status, such as: fiber grating sensors, electrostatic capacitance pressure sensors, etc. At the same time, the power supply of the existing online health...

AI Technical Summary

Problems solved by technology

If the polarization voltage is too low, the polarization effect will be poor, and the piezoelectric properties of piezoelectric materials cannot be fully utilized. If the polarization voltage is too high, it may break down the material, resulting in increased dielectric loss and insufficient polarization.

Conductive carbon black is a material with excellent electrical properties. It can not only improve the dielectric constant and conductivity of polymers and asphalt, but also solve the problems of interfacial compatibility, reduce the applied polarization voltage, and reduce the operating temperature. Difficulty, improve the piezoelectric response of the composite piezoelectric material; but the amount of carbon black needs to be strictly controlled, too much conductive carbon black will increase the conductivity of the composite material rapidly, and part of the electrical energy will be consumed in the form of leakage current and reduced The degree of polarization of the ceramic