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In-situ synthesis preparation method of virtual acoustical material

A technology of in-situ synthesis and acoustic materials, applied in the field of loudspeakers, can solve the problems of the specific mechanism of sound quality and anti-aging mechanism of loudspeakers, etc.

Active Publication Date: 2018-07-06
东莞市真思电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] From the above-mentioned relevant patents and literature reports, it can be seen that the research on the application of inorganic porous microsphere materials for acoustic regulation is still in its infancy, and testing the ⊿F0 value of this type of material is an important means to characterize the acoustic effect of materials. However, the research on the specific action mechanism and anti-aging mechanism of virtual education materials changing the sound quality of speakers in the world is still not very clear.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Step a: Accurately weigh 4g of liquid addition-type heat-curing silicone, 0.01g of aluminum hydroxide, and 6g of carbon black with an average primary particle size of 23nm, stir and dissolve or disperse evenly with 40ml of dichloromethane as the reaction oil phase; 8g of polyvinyl alcohol-1799 and 12.5g of non-ionic emulsifier isomeric alcohol ether 1312, stirred and heated to 90°C with 400g of pure water to fully dissolve, filtered with 300 mesh filter cloth as the reaction water phase; under rapid stirring, the reaction Pour the oil phase into the reaction water phase at one time, and then slowly raise the temperature to the temperature of the mixed system to about 80°C, so that the solvent is gradually volatilized, and the silica gel quickly reacts to solidify the oil phase into solid microspheres, further raising and controlling the temperature of the system Continue to react at about 90-95°C for 2 hours to completely harden the microspheres. The reaction product is...

Embodiment 2

[0022] Step a: Accurately weigh 3.5g of liquid addition-type heat-curable silicone, 0.01g of aluminum hydroxide, and 6.5g of carbon black with an average primary particle size of 23nm, stir and dissolve or disperse evenly with 40ml of dichloromethane, and use it as the reaction oil phase; Weigh 8g of polyvinyl alcohol-1799 and 12.5g of non-ionic emulsifier isomerized alcohol ether 1312, stir and heat with 400g of pure water to 90°C to fully dissolve, filter with a 300-mesh filter cloth as the reaction water phase. Under rapid stirring, the reaction oil phase is poured into the reaction water phase at one time, and then the temperature is slowly raised to the temperature of the mixed system to about 80°C, so that the solvent is gradually evaporated, and the silica gel quickly reacts to solidify the oil phase into solid microspheres, further The temperature of the system is raised and controlled at about 90-95°C to continue the reaction for 2 hours to completely harden the micros...

Embodiment 3

[0025] Step a: Accurately weigh 2.5g of liquid addition-type heat-curable silicone, 0.01g of aluminum hydroxide, and 7.5g of carbon black with an average primary particle size of 23nm, stir and dissolve or disperse evenly with 40ml of dichloromethane, and use it as the reaction oil phase; Weigh 8g of polyvinyl alcohol-1799 and 12.5g of non-ionic emulsifier isomerized alcohol ether 1312, stir and heat with 400g of pure water to 90°C to fully dissolve, filter with a 300-mesh filter cloth as the reaction water phase. Under rapid stirring, the reaction oil phase is poured into the reaction water phase at one time, and then the temperature is slowly raised to the temperature of the mixed system to about 80°C, so that the solvent is gradually evaporated, and the silica gel quickly reacts to solidify the oil phase into solid microspheres, further The temperature of the system is raised and controlled at about 90-95°C to continue the reaction for 2 hours to completely harden the micros...

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PUM

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Abstract

The invention discloses an in-situ synthesis preparation method of a virtual acoustical material. The in-situ synthesis preparation method takes organic silica gel as a silicon oxide source and an active adhesive, aluminum oxide or aluminum hydroxide, gas-phase silicon dioxide and the like as a structure modifier and nano-micron grade carbon black as a pore-forming agent; the components are dissolved or dispersed uniformly through a solvent, so that microspheres with the grain diameter in a range of 50 microns to 2 millimeters are prepared in a water-phase system containing a surfactant through a suspension polymerization method. The prepared microspheres are calcined at high temperature under an oxygen environment to remove the pore-forming agent and carbon and hydrogen components, so that a white porous composite inorganic microsphere material is obtained; the white porous composite inorganic microsphere material is sorted through a screen mesh to obtain products with a plurality ofgrades in a range of 50 microns to 1000 microns. According to the method disclosed by the invention, a resonant mode of a rear cavity of a loudspeaker is changed and a virtual resonant space is increased so that the actual volume of the loudspeaker is greatly reduced and the acoustical effect of the loudspeaker is not influenced, and furthermore, the requirements on smaller and thinner acousticalcomponents and better effect of people are met.

Description

technical field [0001] The invention relates to the field of loudspeakers, in particular to an in-situ synthesis preparation method of a virtual acoustic material. Background technique [0002] The current common structure of the electroacoustic conversion device is composed of a loudspeaker and a housing resonant space (such as a sound box). However, with the emergence of ultra-thin mobile phones, ultra-thin TV sets, and even flexible electronic products in recent years, the original electroacoustic conversion device structure has obviously been difficult to meet people's requirements for smaller and thinner acoustic components with better effects; Gas adsorption materials, such as activated carbon or zeolite, can be placed in the resonance space of the shell of the electroacoustic conversion device to improve the sound quality of the sound generating device. The reason is that the porous gas adsorption material is placed in the resonance space of the speaker, which can ca...

Claims

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Application Information

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IPC IPC(8): C01B33/18C01F7/44
CPCC01B33/18C01F7/44C01P2004/82C01P2006/10
Inventor 孙自才黄健英汪小龙黄海龙徐枫凯林长树
Owner 东莞市真思电子有限公司
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