Method for preparing three-component phononic crystal by using scattering objects

Abstract

The invention relates to a method for preparing a three-component phononic crystal by using scattering objects. The method comprises the following steps: orderly arranging and uniformly coating the scattering objects in substrates, wherein the substrates are epoxy resins in different mixture ratios; the process of coating is implemented by using a molding mold, wherein the molding mold consists of an upper molding plate (1), a lower molding plate a (3) and a lower molding plate b (5); scrubbing the scattering objects by using acetone and arranging the scrubbed scattering objects in a semispherical hole (4) of the lower molding plate a; covering the upper molding plate at the upper end of the lower molding plate a; casting the epoxy resins from which air bubbles are removed into the lower molding plate a from a casting hole (2) of the upper molding plate (2); solidifying the scattering objects in a baking oven at the temperature of between 30 and 100 DEG C for 24 hours; turning the scattering objects coated and solidified by the epoxy resins for 180 degrees and placing the turned scattering objects into a concave volume of the lower molding plate b; and casting the epoxy resins onto the other sides of the scattering objects and solidifying the scattering objects in the baking oven at the temperature of between 30 and 100 DEG C for 24 hours to obtain the three-component phononic crystal. The three-component phononic crystal has the characteristics of stable performance, uniform interface, strong designability and the like.

Description

technical field [0001] The invention belongs to the technical field of material composite molding technology, and in particular relates to a method for preparing a three-component phononic crystal by using a scatterer. Background technique [0002] In recent years, the research on the propagation of classical waves in periodic composite media is extremely active, and the functional materials with artificial structures with elastic wave band gaps are called phononic crystals, and the phononic crystals composed of three component materials are called phononic crystals. Three-component phononic crystal. [0003] Phononic crystals have similar basic characteristics to photonic crystals: phononic crystals have energy bands, and there is an acoustic band gap between the energy bands. When the frequency of the sound wave falls within the frequency range of the sound wave band gap, the sound wave is prohibited from propagating. Inside the phononic crystal, the elastic constants, ma...

AI Technical Summary

Problems solved by technology

[0004] The three-component phononic crystal is generally composed of a vibrator, a cladding body and a matrix. The cladding body and the vibrator constitute a two-component phononic crystal, and the scatterer formed by the two-component phononic crystal is a three-component phononic crystal. The basic conditions of the three-component phononic crystal can be prepared by wrapping the scatterer in the matrix, but the preparation method of the three-component phononic crystal has not been reported so far.

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