A novel graphene composite type electrostatic loudspeaker diaphragm and a preparation method thereof

Abstract

The invention belongs to the field of application of graphene materials to electrostatic loudspeakers, and relates to a novel graphene composite type electrostatic loudspeaker diaphragm which comprises a loudspeaker diaphragm body and graphene coatings coating the two sides of the loudspeaker diaphragm body, the loudspeaker diaphragm body is a polymer film, and the thickness ranges from 2 micrometers to 7 micrometers. the graphene coating is prepared from the following components in parts by weight: 5-50 parts of a water-based film forming base material; 1-20 parts of a graphene slurry; 5-50 parts of deionized water; 5-50 parts of a cosolvent; And 1-10 parts of an auxiliary agent. The vibrating diaphragm is compounded with the graphene material, so that the structural strength of the vibrating diaphragm is enhanced under the condition that the thickness and the mass of the vibrating diaphragm are not changed basically, and the flexibility of the vibrating diaphragm is better; Meanwhile, the graphene has excellent superconducting performance; Uniform island type polarization charge points are formed on the surface of the vibrating diaphragm, the analyzing capacity of the vibrating diaphragm on a sound source is improved, the distortion rate of sound is reduced, and due to the fact that the graphene is high in heat conductivity coefficient, resistant to acid, alkali and salt andother chemicals and high in adhesive force with the PEI diaphragm, the graphene composite vibrating diaphragm is good in heat dissipation, good in abrasion resistance and improved in aging resistance.

Description

technical field [0001] The invention belongs to the application field of graphene materials in electrostatic speakers, and in particular relates to a novel graphene composite electrostatic speaker diaphragm and a preparation method thereof. Background technique [0002] The loudspeaker is a very commonly used electro-acoustic transducer. The loudspeaker is the weakest device in the audio equipment, and it is also the most important part for the sound effect. According to its principle of energy conversion, speakers can be divided into electric, electrostatic, electromagnetic, piezoelectric and other types. Electrostatic speakers are speakers in which the diaphragm vibrates back and forth under the action of electrostatic force to push the air to generate sound waves. The main advantages of the electrostatic speaker are: the diaphragm is extremely light, so it has very good flexibility and excellent resolution, and can capture extremely subtle changes in the music signal. T...

AI Technical Summary

Problems solved by technology

The main defect of the electrostatic speaker is that it requires a higher polarization voltage and requires a larger diaphragm area, which is not convenient for making a portable electrostatic audio diaphragm; in addition, the efficiency is not high, the sound pressure output is low, and the dynamic is small. At the same time, because the diaphragm requires 2um-7um, the processing is easy to be damaged, the process is difficult, and the cost is relatively expensive

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