Molecular sieve, and sound absorption material and electro-acoustic device adopting molecular sieve

A sound-absorbing material and molecular sieve technology, applied in the field of molecular sieves, can solve problems such as fuzzy composition requirements, achieve good low-frequency performance, increase the sound pressure value, and increase the volume of the cavity.

Inactive Publication Date: 2017-06-20
AAC TECH NANJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Low-frequency improvement materials used in existing patents include activated carbon, zeolite, molecular sieve, MgO, Al 2 o 3 , SiO 2 etc.; for molecular sieve materials, the composition requirements in the patent are relatively vague. For example, in the patent CN103098490A, the composition requirement is that the mass ratio of silicon to aluminum is greater than 200, and there is no requirement for other components

Method used

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  • Molecular sieve, and sound absorption material and electro-acoustic device adopting molecular sieve
  • Molecular sieve, and sound absorption material and electro-acoustic device adopting molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A kind of MFI molecular sieve, its crystal framework component content: SiO 2 98.55%, Al 2 o 3 0.31%; the cation content of the balance skeleton charge: Na20 is 0.39%, CaO is 0.11%, and K2O is 0.23%. The content of each ingredient is less than 100% because it will inevitably contain some other trace ingredients, the type is uncertain, but it will not affect the performance.

Embodiment 2

[0037] A kind of MFI molecular sieve, its crystal framework component content: SiO 2 98.10%, Al 2 o 3 0.42%; cation content to balance the charge of the skeleton: Na 2 O is 0.71%, CaO is 0.14%, K 2 O is 0.21%.

Embodiment 3

[0039] A kind of MFI molecular sieve, its crystal framework component content: SiO 2 98.23%, Al 2 o 3 0.34%; cation content to balance the charge of the skeleton: Na 2 0 is 0.27%, CaO is 0.09%, K 2 O is 0.68%.

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Abstract

The invention provides a molecular sieve. Crystal framework components of the molecular sieve comprise: ZO2 and MxOy; cation components for balancing framework charges comprise: Na2O, CaO and K2O, wherein the content of each component satisfies: 96 or more percent by weight of the ZO2, 0-1 percent by weight of the MxOy, 0-1 percent by weight of the Na2O, 0-0.5 percent by weight of the CaO, and 0-1 percent by weight of the K2O. Z is one or more of Si, Ti and Ge, and M is one or more of Al, Fe, V, Zr, P and B. The molecular sieve provided by the invention is applied to an electro-acoustic device, and serves as a sound absorption material to enable an electro-acoustic device system to present better low-frequency performance: f0 of the whole molecular sieve is reduced, and a sound pressure value of a low-frequency part is increased. The invention also provides the sound absorption material for the molecular sieve and the electro-acoustic device.

Description

[0001] 【Technical field】 [0002] The invention relates to a molecular sieve, in particular to a molecular sieve capable of enhancing the low-frequency performance of an electroacoustic device. [0003] 【Background technique】 [0004] In the electro-acoustic device device, adding porous material to the box cavity on the back can have the effect of increasing the volume of the cavity, so that the electro-acoustic device system can show better low-frequency performance: the overall f 0 decrease, the sound pressure value of the low frequency part increases. [0005] Low-frequency improvement materials used in existing patents include activated carbon, zeolite, molecular sieve, MgO, Al 2 o 3 , SiO 2 etc.; for molecular sieve materials, the composition requirements in the patent are relatively vague. For example, in the patent CN103098490A, the composition requirement is that the silicon-aluminum mass ratio is greater than 200, and there is no requirement for other components. T...

Claims

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Application Information

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IPC IPC(8): C01B39/02H04R1/22
CPCC01B39/026H04R1/22
Inventor 王和志
Owner AAC TECH NANJING
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