Mesoporous sound-absorbin material particles and preparation method thereof

Abstract

The invention discloses mesoporous sound-absorbin material particles and a preparation method thereof. The preparation method comprises the following steps: step 1, mixing sound-absorbing material powder, a templating agent and a binding agent with water to form a sol slurry, wherein the templating agent is an organic monomer or a linear polymer, and the purity of the templating agent is greater than 95%; step 2, dropping the sol slurry into forming oil, wherein droplets of the sol slurry are aged in the forming oil to form gel particles; step 3, taking out the gel particles from the forming oil, and drying the gel particles to form the mesoporous sound-absorbing material particles; step 4, roasting the mesoporous sound-absorbin material particles.

Description

technical field [0001] The invention belongs to the technical field of material processing, and in particular relates to a preparation method of mesoporous sound-absorbing material particles and a mesoporous sound-absorbing material particle. Background technique [0002] In recent years, as wearable electronic products become lighter and thinner, traditional foaming sound-absorbing materials can no longer meet the needs of the micro-speaker industry for the adjustment and correction of acoustic performance. Placing porous sound-absorbing materials in the back cavity of the device can effectively improve its acoustic performance. At present, such new sound-absorbing materials with good application effects include natural zeolite, activated carbon, white carbon black, zeolite powder with a silicon-aluminum ratio of more than 200, etc. sound-absorbing material. In the application process, the above powdered non-foaming sound-absorbing material needs to be prepared into granul...

AI Technical Summary

Problems solved by technology

However, the inventors of the present invention have found through actual use and testing that the strength of the granules produced by the extrusion method, the boiling granulation method, and the rolling into ball method is relatively poor, the surface is not smooth and the particle size is uneven, and the physical structure and performance have been affected to a certain extent. The sound-absorbing effect of the particles made of sound-absorbing materials is limited, and it will affect the flow of air in the rear cavity of the speaker

However, the particles formed by the spray drying method are relatively small, and the particle size distribution is uneven, and the sound absorption effect has not reached the expected level.

Therefore, the inventors of the present invention believe that the filling of the existing sound-absorbing material particles into the rear acoustic cavity of the loudspeaker structure has caused two problems. First, it hinders the air flow in the rear cavity, reducing the sensitivity of the speaker. The negative pressure generated affects the normal operation of the speaker diaphragm; second, the sound-absorbing effect of the sound-absorbing material particles is limited, and there is still room for improvement

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