CN108275696A - A kind of preparation method of the loudspeaker enclosure and the molecular sieve of molecular sieve including the molecular sieve - Google Patents
A kind of preparation method of the loudspeaker enclosure and the molecular sieve of molecular sieve including the molecular sieve Download PDFInfo
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- CN108275696A CN108275696A CN201810006518.4A CN201810006518A CN108275696A CN 108275696 A CN108275696 A CN 108275696A CN 201810006518 A CN201810006518 A CN 201810006518A CN 108275696 A CN108275696 A CN 108275696A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B39/00—Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
- C01B39/02—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
- C01B39/36—Pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11
- C01B39/38—Type ZSM-5
- C01B39/40—Type ZSM-5 using at least one organic template directing agent
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B39/00—Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
- C01B39/02—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
- C01B39/026—After-treatment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/14—Pore volume
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- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
Abstract
The present invention relates to molecular sieve and loud speakers, disclose a kind of molecular sieve, and with MFI structure, including skeleton and extraframework cation, the skeleton includes SiO2With metal oxide MxOy；Si/M atomic ratios are at least 50 in the skeleton, and wherein M includes boron, and the extraframework cation is at least one of hydrogen ion, alkali metal ion or alkaline-earth metal.The present invention also provides a kind of preparation methods of the loudspeaker enclosure including the molecular sieve and the molecular sieve.The preparation method of the loudspeaker enclosure and the molecular sieve of molecular sieve including the molecular sieve provided by the invention, can effectively prevent molecular sieve to fail, and improve the stability of loud speaker.
Description
Technical field
The present embodiments relate to molecular sieve and loudspeaker enclosure, more particularly to it is a kind of for improve speakers low frequencies performance and
Molecular sieve of stability and its preparation method and application.
Background technology
With the development of science and technology and improvement of living standard, people are higher and higher to the performance requirement of loud speaker.Particularly,
For mobile phone speaker, it is desirable that outstanding acoustics performance is provided while volume is small as possible.The sound quality and design of loud speaker,
Manufacturing process is in close relations, especially the size design of loud speaker back cavity.Under normal conditions, loud speaker back cavity is smaller, low frequency frequency
The acoustic response of section is poorer, and the performance of the acoustics such as sound quality is also poorer, so must try to expand the back cavity of loud speaker, promotes its low frequency
The acoustic response of section.Porous charcoal, silica, single structure molecule are filled usually into the back cavity of loudspeaker enclosure in the prior art
The sound-absorbing materials such as sieve improve back cavity gas compliance, so as to improve low frequency performance to increase the virtual volume of back cavity, wherein single
One structure molecular screen is best to the improvement of low frequency performance.
However, it is found by the inventors that at least there are the following problems in the prior art：The surface micropore of single structure molecular sieve holds
Easily by the moisture and Organic Material Blocking in air so that molecular sieve fails, and causes loudspeaker enclosure stability not high.
Invention content
The loudspeaker enclosure for being designed to provide a kind of molecular sieve including the molecular sieve and the molecule of embodiment of the present invention
The preparation method of sieve, the stability that molecular sieve failure can be avoided, promote loudspeaker enclosure.
In order to solve the above technical problems, embodiments of the present invention provide a kind of molecular sieve, with MFI structure, packet
It includes：Skeleton and extraframework cation, the skeleton include SiO2With metal oxide MxOy；Si/M atomic ratios are extremely in the skeleton
It is 50 less, wherein M includes boron, and the extraframework cation is at least one of hydrogen ion, alkali metal ion or alkaline-earth metal.
Embodiments of the present invention additionally provide a kind of loudspeaker enclosure, including：Upper cover plate assembles to be formed with the upper cover plate
The lower cover of receiving space, the sounding monomer for being contained in the receiving space, the sounding monomer separate the receiving space
At ante-chamber and back cavity, sound-absorbing material is filled in the back cavity, the sound-absorbing material is the molecular sieve described in the above embodiment.
Embodiments of the present invention additionally provide a kind of preparation method of molecular sieve as elucidated before, including following step
Suddenly：Silicon source, alkali, template, the sources M and the water of corresponding ratio is taken to be synthesized；Sintering forms the MFI molecular sieves with micropore；Add
Adding additives form particulate molecular sieve.
Embodiment of the present invention in terms of existing technologies, due to the molecular sieve include outside skeleton and skeleton sun from
Son grown the macropore that one layer of property is different and aperture is larger on the microcellular structure surface for playing absorption and desorption to air
Structure, on the one hand, since the aperture of macroporous structure is larger, the microcellular structure of internal layer is passed in and out on air influences very little, it is ensured that interior
Improvement of the layer microcellular structure to low frequency performance；On the other hand, the macroporous structure on surface layer can adsorb moisture in air and
Organic matter effectively prevents to protect the internal microcellular structure for playing absorption and desorption not by moisture and Organic Material Blocking
Molecular sieve failure, improves the stability of loud speaker.
In addition, M further includes the trivalent and/or quadrivalent metallic ion in addition to boron.
In addition, M further includes at least one of titanium, iron, aluminium, zirconium.
In addition, the silicon boron molar ratio in the skeleton is more than 100.So set, the molecular sieve is improving low frequency
Energy aspect effect is more.
In addition, the grain size of the molecular sieve is more than 10 nanometers.
In addition, the grain size of the molecular sieve is less than 10 microns.
In addition, the molecular sieve is the MFI structure molecular sieve of pure phase.
In addition, the template is one or more in organic amine, organic ammonium salt or organic base.
Description of the drawings
Fig. 1 is the package assembly vertical view for the loudspeaker enclosure that embodiment of the present invention provides；
Fig. 2 is the sectional view along A-A directions shown in Fig. 1；
Fig. 3 is the flow chart of the synthesis preparation method of the MFI structure boron doping molecular sieve of embodiment of the present invention；
Fig. 4 is XRD (X-ray diffraction) standard spectrogram of ZSM-5 framework type molecular sieves；
Fig. 5 is XRD (X-ray diffraction) spectrogram of boron doping ZSM-5 framework type molecular sieves.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention
Each embodiment be explained in detail.However, it will be understood by those skilled in the art that in each embodiment party of the present invention
In formula, many technical details are proposed in order to make reader more fully understand the present invention.But even if without these technical details
And various changes and modifications based on the following respective embodiments, it can also realize claimed technical solution of the invention.
The first embodiment of the present invention is related to a kind of molecular sieves 10, with MFI structure, including：Outside skeleton and skeleton
Cation, the skeleton include SiO2With metal oxide MxOy；Si/M atomic ratios are at least 50 in the skeleton, and wherein M includes
B (boron), the extraframework cation are at least one of H (hydrogen) ion, alkali metal ion or alkaline-earth metal.
Embodiment of the present invention in terms of existing technologies, due to the molecular sieve 10 include outside skeleton and skeleton sun from
Son grown the macropore that one layer of property is different and aperture is larger on the microcellular structure surface for playing absorption and desorption to air
Structure, on the one hand, since the aperture of macroporous structure is larger, the microcellular structure of internal layer is passed in and out on air influences very little, it is ensured that interior
Improvement of the layer microcellular structure to low frequency performance；On the other hand, the macroporous structure on surface layer can adsorb moisture in air and
Organic matter effectively prevents to protect the internal microcellular structure for playing absorption and desorption not by moisture and Organic Material Blocking
Molecular sieve failure, improves the stability of loud speaker.It is noted that inventor has found that if silicon boron molar ratio is less than
50, the ability of the macroporous structure adsorption moisture on 10 surface layer of molecular sieve can significantly reduce, and cause the micropore of absorption and desorption
Structure can significantly adsorb the moisture in air, and moisture occupies the micropore canals of most of molecular sieve 10, and causing, which reduces low frequency, improves
Effect；In addition, the too low MFI structure crystallinity that can also cause MFI structure to be difficult to synthesize or synthesize of silicon boron molar ratio is deteriorated.Cause
This, in the present embodiment, silicon boron molar ratio be greater than or equal to 50 so that low frequency improvement effect preferably, synthesis difficulty compared with
Low and crystallinity is preferable.
Preferably, the silicon boron molar ratio in the skeleton is more than 100, and silicon boron molar ratio is higher, and molecule is filled in back cavity
The loudspeaker enclosure of sieve 10 is better in the acoustical behavior of low-frequency range.
In addition, the M can also include the trivalent metal ion and/or quadrivalent metallic ion in addition to B (boron).This implementation
In mode, the trivalent metal ion can also include one or more in iron ion, aluminium ion.The quadrivalent metallic ion
May include one or more in titanium ion and zirconium ion.It will be understood by those skilled in the art that trivalent metal ion, tetravalence
The type of metal ion is not limited only to the example above, or other metal ions have no effect on the effect of the present invention.
In present embodiment, the grain size of molecular sieve 10 is more than 10 nanometers, it is preferred that the grain size of molecular sieve 10 is big
In 10 nanometers and it is less than 10 microns.Since the grain size of molecular sieve 10 is smaller, in actual use, it is also necessary to
With larger particles are shaped to together with binder, just suitable for as sound-absorbing material.It is noted that in present embodiment, molecule
Sieve 10 is the MFI structure molecular sieve of pure phase, since pure phase molecular sieve purity is higher, filled with molecular sieve 10 in back cavity
Loudspeaker enclosure is more preferable in the acoustical behavior of low-frequency range.
Second embodiment of the present invention provides a kind of loudspeaker enclosure 100, as shown in Fig. 1 to 2, the loudspeaker enclosure
100 include：Upper cover plate 1 and the upper cover plate 1, which assemble, to be formed the lower cover 2 of receiving space 20, be contained in the receiving space 20
Sounding monomer 3, the receiving space 20 is separated into ante-chamber 201 and back cavity 202, lower cover 2 and sounding by the sounding monomer 3
The sounding side interval of monomer 3 forms ante-chamber 201, formed between upper cover plate 1 and lower cover 2 be connected to ante-chamber 201 and the external world go out sound
Channel, the back cavity 202 is interior to be filled with sound-absorbing material, and the sound-absorbing material is the molecular sieve described in above-mentioned first embodiment
10。
Due to the embodiment that present embodiment is the corresponding application of first embodiment, present embodiment and first
Embodiment technique effect having the same, details are not described herein again.
Third embodiment of the present invention provides a kind of preparation method of molecular sieve 10 as described in the first embodiment,
Detailed process is as shown in Figure 3.
S10：Silicon source, alkali, template, the sources M and the water of corresponding ratio is taken to be synthesized.
About step S10, specifically, silicon source, boron source, alkali source, template are dissolved into aging in solvent (water).It is described
Silicon source includes at least one of ethyl orthosilicate, Ludox and sodium metasilicate；The boron source include borax, boric acid, kodalk,
At least one of diborane etc.；The alkali source includes at least one in sodium hydroxide, potassium hydroxide, lithium hydroxide and organic base
Kind；The template is organic amine or organic quaternary amine, tetrapropyl quaternary ammonium salt or quaternary ammonium base, tetrapropyl quaternary ammonium salt or quaternary ammonium base and
At least one of a small amount of auxiliary agent.
S20：High temperature sintering forms the MFI molecular sieves with micropore.
About step S20, specifically, the substance synthesized in step S10 is added in synthesis reaction vessel, in high temperature height
It is sintered under the conditions of pressure.In present embodiment, heating rate be 0.5-5 DEG C/min, preferably 1-3 DEG C/min, sintering temperature 400-
700 DEG C, preferably sintering temperature is 500~600 DEG C, after temperature is increased to maximum sintering temperature, keeps the temperature 1~2 hour, finally
It cools down at room temperature, forms the MFI molecular sieves 10 with micropore.In present embodiment, via molecular sieve 10 made of step S20
For powder type of the grain size between 10 nanometers to 10 microns.
S30：It adds binder and forms particulate molecular sieve.
Since the grain size of the molecular sieve 10 formed in step S20 is too small, if be filled in directly as sound-absorbing material
In loud speaker back cavity, it is easy to be leaked to except fill area, influences the normal use of loud speaker, therefore, step S30 is in molecule
Addition binder is to form particulate molecular sieve in sieve 10, just suitable for being filled as sound-absorbing material.Binder is broadly divided into inorganic
Class binder and organic polymer class binder：Activated alumina, Ludox etc. can be selected in inorganic binder；Organic polymer
Esters of acrylic acid, epoxies, polyurethanes etc. can be selected in binder.
It is noted that during molecular sieve 10 is bonded to granular, solvent and auxiliary agent can also be added.It is molten
Agent refers mainly to water and various common organic solvents, such as：Ethyl alcohol, toluene, acetone, tetrahydrofuran etc..Wherein, auxiliary agent can be
Modifying agent or expanding agent etc., for example, sesbania powder, graphite, activated carbon, paraffin, stearic acid, glycerine, oxalic acid, tartaric acid, citric acid,
Starch, polyethylene glycol, polyvinyl alcohol, polyethylene oxide, polypropylene amine, methyl cellulose, cellulose, polymeric alcohol, nitric acid, salt
At least one of acid, acetic acid, formic acid, ammonium hydroxide, tetramethylammonium hydroxide, tetraethyl ammonium hydroxide and tetrapropylammonium hydroxide,
The additive amount of auxiliary agent is less than 5% (weight ratio).
Can also include that sun is carried out to the molecular sieve 10 before step S30 after step S20 in present embodiment
The step of ion exchange, to obtain the MFI structure molecular sieve 10 of different types.The step may be used ammonium salt, cuprous salt,
The salt of monovalence silver salt, monovalence gold salt, the salt of alkali metal or alkaline-earth metal, with zeolite exchange.Ammonium salt can be ammonium chloride, nitric acid
Ammonium, ammonium sulfate, ammonium carbonate etc.；Mantoquita can be stannous chloride, and silver salt can be silver nitrate；Alkali metal can be：Lithium salts, sodium
The anion of salt, sylvite, rubidium salt etc., alkali metal salt can be chlorion, sulfate ion, nitrate ion etc.；Alkaline earth gold
Category can be magnesium salts, calcium salt, barium salt etc., and the anion of alkali metal salt can be chlorion, sulfate ion, nitrate ion
Deng.
In the synthesis preparation method example 1 of this MFI structure molecular sieve 10, with silicon source, boron source, alkali source, template and hydration
The MFI molecular sieves 10 for being 50 at silicon boron molar ratio.Wherein, template is 4-propyl bromide, tetrapropylammonium hydroxide, tetrapropyl
At least one of ammonium chloride, tetrapropyl ammonium iodide and tetrapropyl ammonium fluoride.Shaped granule is put into applicable loud speaker tooling, is surveyed
Try its acoustical behavior.It is 1 cubic centimetre that acoustical behavior, which measures loud speaker tooling back cavity volume used, and specific test data is shown in Table 1,
X-ray diffraction (XRD) standard spectrogram of ZSM-5 framework type molecular sieves is shown in Fig. 4, the x-ray of boron doping ZSM-5 framework type molecular sieves
Diffraction spectrogram is shown in Fig. 5.
In the synthesis preparation method example 2 of this MFI structure molecular sieve 10, with silicon source, boron source, alkali source, template and hydration
The MFI molecular sieves 10 for being 300 at silicon boron molar ratio.Wherein, template is 4-propyl bromide, tetrapropylammonium hydroxide, 4 third
At least one of ammonium chloride, tetrapropyl ammonium iodide and tetrapropyl ammonium fluoride.Shaped granule is put into applicable loud speaker tooling,
Test its acoustical behavior.It is 1 cubic centimetre that acoustical behavior, which measures loud speaker tooling back cavity volume used, and specific test data is shown in Table
1。
In the synthesis preparation method example 3 of this MFI structure molecular sieve 10, with silicon source, boron source, alkali source, template and hydration
The MFI molecular sieves 10 for being 50 at silicon boron molar ratio.Wherein, template is 4-propyl bromide, tetrapropylammonium hydroxide, tetrapropyl
At least one of ammonium chloride, tetrapropyl ammonium iodide and tetrapropyl ammonium fluoride.Wherein, it is added a small amount of aluminium, aluminium in synthetic powder
Mass content 0.15%.Shaped granule is put into applicable loud speaker tooling, tests its acoustical behavior.Acoustical behavior is raised used in measuring
Sound device tooling back cavity volume is 1 cubic centimetre, and specific test data is shown in Table 1.
In the synthesis preparation method example 4 of this MFI structure molecular sieve 10, with silicon source, boron source, alkali source, template and hydration
The MFI molecular sieves 10 for being 50 at silicon boron molar ratio.Wherein, template is 4-propyl bromide, tetrapropylammonium hydroxide, tetrapropyl
At least one of ammonium chloride, tetrapropyl ammonium iodide and tetrapropyl ammonium fluoride.With sodium ion exchange, sodium form MFI structure is obtained.Sodium
Salt includes：At least one therein such as sodium chloride, sodium sulphate, sodium nitrate, but be not limited only in this.Shaped granule is put into applicable
Loud speaker tooling tests its acoustical behavior.It is 1 cubic centimetre that acoustical behavior, which measures loud speaker tooling back cavity volume used, specifically
Test data is shown in Table 1.
In the synthesis preparation method example 5 of this MFI structure molecular sieve 10, with silicon source, boron source, alkali source, template and hydration
The MFI molecular sieves 10 for being 50 at silicon boron molar ratio.Wherein, template is 4-propyl bromide, tetrapropylammonium hydroxide, tetrapropyl
At least one of ammonium chloride, tetrapropyl ammonium iodide and tetrapropyl ammonium fluoride.It is exchanged with sodium ion and potassium ion, obtains sodium potassium type
MFI structure.Sodium salt includes：At least one therein such as sodium chloride, sodium sulphate, sodium nitrate, but be not limited only in this.Sylvite packet
It includes：At least one therein such as potassium chloride, potassium sulfate, potassium nitrate, but be not limited only in this.Shaped granule is put into be applicable in and is raised one's voice
Device tooling tests its acoustical behavior.It is 1 cubic centimetre that acoustical behavior, which measures loud speaker tooling back cavity volume used, specific to test
Data are shown in Table 1.
1 acoustical behavior table of table
In table 1, F0 is intrinsic frequency, and Q is acoustic absorptivity.
Experimental data proves that the silicon boron molar ratio of MFI molecular sieves is bigger (example 2), to the low-frequency range acoustics of loudspeaker enclosure
Performance improvement effect is better, in the skeleton of MFI molecular sieves the oxide (example 3) of adulterated al, to MFI molecular sieves carry out sodium from
Son exchanges (example 4), carries out sodium ion and potassium ion exchange (example 5) to MFI molecular sieves, can improve low-frequency range acoustics
Can, and sodium ion exchange (example 4) is carried out to MFI molecular sieves and exchanges (example with to MFI molecular sieves progress sodium ion and potassium ion
5) it compares, the MFI molecular sieves that the two is formed are substantially the same the improvement of the acoustical behavior of low-frequency range.
It will be understood by those skilled in the art that the respective embodiments described above are to realize specific embodiments of the present invention,
And in practical applications, can to it, various changes can be made in the form and details, without departing from the spirit and scope of the present invention.
Claims (10)
1. a kind of molecular sieve, with MFI structure, including skeleton and extraframework cation, the skeleton includes SiO2And metal oxygen
Compound MxOy；It is characterized in that, Si/M atomic ratios are at least 50 in the skeleton, wherein M includes boron, the extraframework cation
For at least one of hydrogen ion, alkali metal ion or alkaline-earth metal.
2. molecular sieve according to claim 1, which is characterized in that M further includes the trivalent and/or tetravalent metal in addition to boron
Ion.
3. molecular sieve according to claim 2, which is characterized in that M further includes at least one of titanium, iron, aluminium, zirconium.
4. molecular sieve according to claim 3, which is characterized in that the silicon boron molar ratio in the skeleton is more than 100.
5. molecular sieve according to any one of claims 1 to 4, which is characterized in that the grain size of the molecular sieve is more than
10 nanometers.
6. molecular sieve according to claim 5, which is characterized in that the grain size of the molecular sieve is less than 10 microns.
7. loudspeaker enclosure according to claim 1, which is characterized in that the molecular sieve is the MFI structure molecular sieve of pure phase.
8. a kind of loudspeaker enclosure, including：Upper cover plate and the upper cover plate, which assemble, to be formed the lower cover of receiving space, be contained in institute
The sounding monomer of receiving space is stated, the receiving space is separated into ante-chamber and back cavity by the sounding monomer, which is characterized in that institute
It states and is filled with sound-absorbing material in back cavity, the sound-absorbing material includes such as claim 1-7 any one of them molecular sieves.
9. a kind of preparation method of molecular sieve as described in claim 1, which is characterized in that include the following steps：Take corresponding ratio
Silicon source, alkali, template, the sources M and the water of example are synthesized；Sintering forms the MFI molecular sieves with micropore；Addition binder is formed
Particulate molecular sieve.
10. the preparation method of molecular sieve as claimed in claim 9, which is characterized in that the template is organic amine, organic ammonium
It is one or more in salt or organic base.
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| CN201810006518.4A CN108275696A (en) | 2018-01-04 | 2018-01-04 | A kind of preparation method of the loudspeaker enclosure and the molecular sieve of molecular sieve including the molecular sieve |
| US16/236,543 US11014820B2 (en) | 2018-01-04 | 2018-12-30 | Molecular sieve, preparation thereof and acoustic absorption material and speaker containing the same |
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| CN201810006518.4A CN108275696A (en) | 2018-01-04 | 2018-01-04 | A kind of preparation method of the loudspeaker enclosure and the molecular sieve of molecular sieve including the molecular sieve |
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Cited By (7)
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| CN108975350A (en) * | 2018-07-28 | 2018-12-11 | 瑞声科技（南京）有限公司 | The loudspeaker enclosure of sound-absorbing material and its preparation method and application sound-absorbing material |
| CN108996515A (en) * | 2018-07-28 | 2018-12-14 | 瑞声科技（南京）有限公司 | A kind of sound-absorbing material and the loudspeaker enclosure using the sound-absorbing material |
| CN109133093A (en) * | 2018-07-28 | 2019-01-04 | 瑞声科技（南京）有限公司 | A kind of sound-absorbing material and the loudspeaker using the sound-absorbing material |
| WO2021129719A1 (en) * | 2019-12-26 | 2021-07-01 | 镇江贝斯特新材料有限公司 | Hierarchical porous zsm-5 molecular sieve, preparation method therefor, hzsm-5 molecular sieve prepared therefrom, and use of molecular sieve |
| WO2022161467A1 (en) * | 2021-01-28 | 2022-08-04 | 镇江贝斯特新材料有限公司 | Acoustic reinforcing material block and application thereof, micro loudspeaker and electronic device |
| EP4310829A1 (en) * | 2022-07-18 | 2024-01-24 | SSI New Material (Zhenjiang) Co., Ltd. | Iron-modified acoustic material, production method thereof, speaker and electronic device |
| WO2024188335A1 (en) * | 2023-03-15 | 2024-09-19 | 镇江贝斯特新材料股份有限公司 | Ith molecular sieve improved loudspeaker, and electronic device |
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