A kind of composite piezoelectric material and preparation method thereof

Abstract

The invention provides a composite piezoelectric material and a preparation method thereof. The material is prepared from emulsified asphalt, piezoelectric ceramic powder, cement, mortar rheology agent, water reducing agent and water. The preparation method includes: preparing materials; pretreatment of emulsified asphalt; pretreatment of water reducing agent; mixing materials; molding; bonding electrodes; polarization and so on. The material of the invention can be used to make a sensor of a health monitoring system to monitor the stress and deformation of the ballastless track. Monitor the safety status of the road surface at any time to reduce the occurrence of accidents; can manufacture micro-power piezoelectric power generation units to provide electricity for the monitoring system, and realize the energy self-sufficiency of the road surface health monitoring system; solve the problem of compatibility between existing piezoelectric materials and CA mortar The problem of poor performance; piezoelectric composite materials provide excellent noise reduction, vibration reduction and dissipation damage performance for high-speed driving loads, ensuring the safety and comfort of slab track high-speed driving. It provides convenience for future maintenance of the road surface and greatly saves manpower and material resources.

Description

technical field [0001] The invention relates to a cement composite piezoelectric material and a preparation method thereof, in particular to a piezoelectric ceramic powder-emulsified asphalt-cement composite piezoelectric material and a preparation method thereof. Background technique [0002] Ballastless track has the advantages of good smoothness, good stability, long service life and good durability. It is an advanced track technology in the world today, which can reduce maintenance, reduce dust, and beautify the environment. Moreover, the train speed can reach more than 300 kilometers per hour. The development of railways has epoch-making significance. [0003] As a key process of laying and positioning high-speed railway track slabs, the pouring and curing of CA mortar is a key process with high technical requirements and is greatly affected by the external environment. [0004] Embed the piezoelectric composite material in the CA mortar layer. When the CA mortar layer...

AI Technical Summary

Problems solved by technology

However, the compatibility between the existing piezoelectric materials and CA mortar is poor, which can easily lead to cracking and damage of the CA mortar layer, and the cost of the monitoring system is higher.