Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Core-shell molecular sieve and preparation method thereof, sound absorption material and loudspeaker
The invention provides a molecular sieve with a core-shell structure, which takes a ZSM-5 molecular sieve with a mesoporous structure as a nuclear phase, and the mass ratio of silicon to aluminum of the nuclear phase is 50-150; the core-shell structure molecular sieve takes a rare earth metal modified ZSM-5 molecular sieve with a microporous structure as a shell layer, the mass ratio of silicon to aluminum of the shell layer is 300-800, and the shell layer contains 1-5wt% of rare earth metal. The shell layer of the core-shell structure molecular sieve has a high silica-alumina ratio, the water resistance is greatly improved after rare earth metal modification, and meanwhile, the microporous structure of the shell layer can effectively prevent VOCs from entering the nuclear phase of the core-shell structure molecular sieve, so that the nuclear phase molecular sieve can keep good activity, and the activity of the core-shell structure molecular sieve is improved. The water resistance and the VOCs performance of the sound absorption material prepared from the core-shell structure molecular sieve are improved, so that a loudspeaker filled with the sound absorption material has stable acoustic performance.
本发明提供了一种核壳结构分子筛，其以具有介孔结构的ZSM‑5分子筛为核相，所述核相的硅铝质量比为50‑150；所述核壳结构分子筛以具有微孔结构的稀土金属改性ZSM‑5分子筛为壳层，所述壳层的硅铝质量比为300‑800，所述壳层含有1‑5wt％的稀土金属。所述核壳结构分子筛的壳层具有较高的硅铝比，且经过稀土金属改性后抗水性有较大提升，同时壳层的微孔结构可以有效限制VOCs进入核壳结构分子筛的核相，使得核相的分子筛可以保持良好的活性，提升了含有所述核壳结构分子筛制的吸声材料的抗水性和VOCs性能，使得填充了所述吸声材料的扬声器具有稳定的声学性能。
Core-shell molecular sieve and preparation method thereof, sound absorption material and loudspeaker
The invention provides a molecular sieve with a core-shell structure, which takes a ZSM-5 molecular sieve with a mesoporous structure as a nuclear phase, and the mass ratio of silicon to aluminum of the nuclear phase is 50-150; the core-shell structure molecular sieve takes a rare earth metal modified ZSM-5 molecular sieve with a microporous structure as a shell layer, the mass ratio of silicon to aluminum of the shell layer is 300-800, and the shell layer contains 1-5wt% of rare earth metal. The shell layer of the core-shell structure molecular sieve has a high silica-alumina ratio, the water resistance is greatly improved after rare earth metal modification, and meanwhile, the microporous structure of the shell layer can effectively prevent VOCs from entering the nuclear phase of the core-shell structure molecular sieve, so that the nuclear phase molecular sieve can keep good activity, and the activity of the core-shell structure molecular sieve is improved. The water resistance and the VOCs performance of the sound absorption material prepared from the core-shell structure molecular sieve are improved, so that a loudspeaker filled with the sound absorption material has stable acoustic performance.
本发明提供了一种核壳结构分子筛，其以具有介孔结构的ZSM‑5分子筛为核相，所述核相的硅铝质量比为50‑150；所述核壳结构分子筛以具有微孔结构的稀土金属改性ZSM‑5分子筛为壳层，所述壳层的硅铝质量比为300‑800，所述壳层含有1‑5wt％的稀土金属。所述核壳结构分子筛的壳层具有较高的硅铝比，且经过稀土金属改性后抗水性有较大提升，同时壳层的微孔结构可以有效限制VOCs进入核壳结构分子筛的核相，使得核相的分子筛可以保持良好的活性，提升了含有所述核壳结构分子筛制的吸声材料的抗水性和VOCs性能，使得填充了所述吸声材料的扬声器具有稳定的声学性能。
Core-shell molecular sieve and preparation method thereof, sound absorption material and loudspeaker
一种核壳分子筛及其制备方法、吸声材料和扬声器
ZHANG JIE (Autor:in) / WANG HEZHI (Autor:in) / WANG ZHONGYANG (Autor:in)
01.07.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C01B
NON-METALLIC ELEMENTS
,
Nichtmetallische Elemente
/
C04B
Kalk
,
LIME
/
G10K
Tonerzeugungsvorrichtungen
,
SOUND-PRODUCING DEVICES
/
H04R
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS
,
Lautsprecher, Mikrofone, Schallplatten-Tonabnehmer oder ähnliche akustische, elektromechanische Wandler
| Europäisches Patentamt | 2023
Sound-absorbing particles, preparation method thereof and loudspeaker
| Europäisches Patentamt | 2024
| Europäisches Patentamt | 2023
SOUND ABSORPTION MATERIAL PREPARATION METHOD, SOUND ABSORPTION MATERIAL AND FILLING METHOD THEREOF
| Europäisches Patentamt | 2018
Sound absorption material preparation method, sound absorption material and filling method thereof
| Europäisches Patentamt | 2021