Method for producing macro piezoelectric ceramic fiber composite actuator

Abstract

The invention discloses a method for producing a macro piezoelectric ceramic fiber composite actuator. The method includes filling prepared epoxy resin into gaps of cut piezoelectric ceramic fibers by the cutting and filling method to produce piezoelectric ceramic fibers and epoxy resin composites, then sealing cross electrodes on the upper and the lower surfaces of the composites by epoxy resin glue, and further welding leads at two ends of each cross electrode and performing high-pressure polarization to finally produce the novel macro piezoelectric ceramic fiber composite actuator with excellent performance. Under 1kv of alternating voltage, the longitudinal strain of the actuator produced by the method can reach 30 mu epsilon and the transverse strain of the actuator can reach 20 mu epsilon, in other words, longitudinal and transverse stretching can reach 0.69 micrometer and 0.4 micrometer respectively; the method is simple and easy to operate, low in cost, high in efficiency and applicable to mass production.

Description

technical field [0001] The invention relates to a method for preparing a piezoelectric ceramic fiber composite material, in particular to a method for processing and preparing a coarse piezoelectric ceramic fiber composite functional device composed of two materials: coarse piezoelectric ceramic fiber and epoxy resin. It belongs to the field of preparation of intelligent materials and functional devices. [0002] Background technique [0003] Piezoelectric ceramic material refers to a functional material that can realize mutual conversion of mechanical energy and electrical energy. However, due to its shortcomings such as high brittleness, high density, high hardness, and not easy to deform, the application of this type of material has been greatly restricted. In order to overcome these shortcomings, piezoelectric composite materials have been extensively studied since the 1970s. Piezoelectric composites generally refer to a class of materials composed of piezoelectric ce...

AI Technical Summary

Problems solved by technology

[0005] Although the MFC prepared by NASA Langley Research Center (NASA Langley Research Center) has some excellent properties, the preparation method they use still has many shortcomings. Difficult, the flatness of the thin slices is difficult to determine; the fired ceramic thin slices are brittle, and the cutting process is complicated, etc.

At present, there are relatively few related reports in our country. How to prepare MFC with excellent performance and make it more widely used will greatly promote the future development of our country in the field of aviation intelligent structures.