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.
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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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