A kind of piezoelectric functional porous electrode composite material and its preparation method

Abstract

The invention relates to a piezoelectric functional porous electrode composite material and a preparation method thereof. The ingredients are prepared according to the following mass percentages: 3-6% of antimony trioxide, 1-6% of silicon oxide, 1-3% of sodium fluoride, and fluorosilicic acid Sodium 1‑3%, cerium oxide 0.1‑0.45%, waste glass 3‑5%, silicon carbide 3‑5%, and the balance is barium carbonate. The material preparation process includes ball milling, pressing on a tablet press, sintering in a resistance furnace, ball milling again, mixing and pressing with polystyrene copolymer SEBS, and the like. Due to the reducibility of the silicon carbide, the invention effectively prevents the violent oxidation of the material, can make the difference of the oxygen content between the surface of the material and the inside of the material smaller, and makes it possible to obtain a high-performance material. With barium carbonate as the matrix, various conductive ions such as antimony and cerium are distributed on it, which not only has a uniform piezoelectric structure, but also has a strong structure; the combination of antimony and cerium can not only improve the dielectric properties of the material, but also ensure The piezoelectricity of the material. The invention can reduce cost, has simple process and is environmentally friendly, and the prepared material has good stability and practicability.

Description

technical field [0001] The invention belongs to the field of composite materials, and relates to a piezoelectric functional porous electrode composite material and a preparation method. Background technique [0002] Piezoelectric composite materials are piezoelectric materials composed of two or more materials. Common piezoelectric composite materials are two-phase composite materials of piezoelectric ceramics and polymers such as polyvinylidene fluoride or epoxy resin. This composite material combines the strengths of piezoelectric ceramics and polymers, has good flexibility and processability, and has low density, and is easy to achieve acoustic impedance matching with air, water, and biological tissues. [0003] The manufacturing method of the piezoelectric composite material disclosed in the prior art, such as in the patent CN201210023862.7, the manufacturing method of the piezoelectric composite material includes the following steps: mixing piezoelectric ceramic powder...

AI Technical Summary

Problems solved by technology

However, the process is too cumbersome and the piezoelectric performance needs to be improved. Therefore, it is necessary to design a new piezoelectric composite material that is easy to operate and has good performance.

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