Sound adsorbing material and speaker box
The present application provides a sound adsorbing material, including a microporous material and an adsorbate gas adsorbed in the microporous material. The microporous material includes a zeolite molecular sieve, and the zeolite molecular sieve has a framework and extra-framework cations. An adsorption capacity of the adsorbolite molecular sieve to the adsorbate gas is greater than an adsorption capacity of the adsorbolite molecular sieve to air. The present disclosure further provides a speaker box adopting the sound adsorbing material. Compared with the related art, the sound adsorbing material provided by the present disclosure has good application effects, and the speaker box using the sound adsorbing material has a better low frequency acoustic performance.
1. A sound adsorbing material, comprising:
a microporous material; and
an adsorbate gas adsorbed in the microporous material,
wherein the microporous material comprises a zeolite molecular sieve containing at least 85 wt % of silica, and the zeolite molecular sieve comprises a framework and extra-framework cations, and an adsorption capacity of the zeolite molecular sieve to the adsorbate gas is greater than an adsorption capacity of the zeolite molecular sieve to air.
2. The sound adsorbing material as described in claim 1 , wherein the zeolite molecular sieve has a micropore diameter in a range of 0.35 nm to 2 nm.
3. The sound adsorbing material as described in claim 2 , wherein the zeolite molecular sieve has a structure selected from any one of MFI, FER, BEA, CHA, MEL, MOR, or FAU.
4. The sound adsorbing material as described in claim 1 , wherein a content of the extra-framework cations is less than 10 wt %.
5. The sound adsorbing material as described in claim 4 , wherein a content of the extra-framework cations is less than 6 wt %.
6. The sound adsorbing material as described in claim 5 , wherein a content of the extra-framework cations is less than 3 wt %.
7. The sound adsorbing material as described in claim 1 , wherein a content of the silica is at least 90 wt %.
8. The sound adsorbing material as described in claim 7 , wherein the content of the silica is at least 95 wt %.
9. The sound adsorbing material as described in claim 1 , wherein the adsorbate gas is selected from the group consisting of N 2 , CO 2 , SF 6 , C 2 H 6 and combinations thereof.
10. The sound adsorbing material as described in claim 9 , wherein the adsorbate gas is CO 2 .
11. A speaker box, comprising:
a housing having a receiving space; and
a speaker unit disposed in the housing,
wherein the speaker unit divides the receiving space into a front cavity and a rear cavity, and the rear cavity is filled with the sound adsorbing material as described in claim 1 .