CN107216160A - A kind of alumina hollow ball for vibration damping and noise reducing - Google Patents

A kind of alumina hollow ball for vibration damping and noise reducing Download PDF

Info

Publication number
CN107216160A
CN107216160A CN201710493153.8A CN201710493153A CN107216160A CN 107216160 A CN107216160 A CN 107216160A CN 201710493153 A CN201710493153 A CN 201710493153A CN 107216160 A CN107216160 A CN 107216160A
Authority
CN
China
Prior art keywords
hollow ball
alumina hollow
thin
walled
alumina
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201710493153.8A
Other languages
Chinese (zh)
Other versions
CN107216160B (en
Inventor
张杨
战丽
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Northeast Forestry University
Original Assignee
Northeast Forestry University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Northeast Forestry University filed Critical Northeast Forestry University
Priority to CN201710493153.8A priority Critical patent/CN107216160B/en
Publication of CN107216160A publication Critical patent/CN107216160A/en
Application granted granted Critical
Publication of CN107216160B publication Critical patent/CN107216160B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C04B35/803—
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/628—Coating the powders or the macroscopic reinforcing agents
    • C04B35/62802—Powder coating materials
    • C04B35/62805—Oxide ceramics
    • C04B35/62813—Alumina or aluminates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
    • C04B38/085—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances of micro- or nanosize
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/52—Constituents or additives characterised by their shapes
    • C04B2235/5208—Fibers
    • C04B2235/5216—Inorganic
    • C04B2235/522—Oxidic
    • C04B2235/5232—Silica or silicates other than aluminosilicates, e.g. quartz
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Nanotechnology (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

This application provides a kind of alumina hollow ball for vibration damping and noise reducing, including thin-walled alumina hollow ball and mixed sintering layer, mixed sintering layer is coated on the whole spherical outside surface of thin-walled alumina hollow ball by powder sintered connection；Thin-walled alumina hollow ball is made first, then again using the thin-walled alumina hollow ball as ball pelletizing, one layer of alumina powder for being blended with basalt fibre is sintered on the spherical outside surface of the thin-walled alumina hollow ball by PM technique；The wall thickness of thin-walled alumina hollow ball is smaller, reduce the manufacturing cycle of thin-walled alumina hollow ball, reduce the time of break-through of the gasification gas of colloidal carbon sphere, the oxidized diffusion time of oxygen is reduced, using high temperature sintering, and it is compressing using isostatic cool pressing, improve the intensity hardness of sintered product, the shrinkage factor in sintering process is substantially reduced, so as to reduce the manufacturing cycle of alumina hollow ball, the intensity hardness of alumina hollow ball is improved.

Description

A kind of alumina hollow ball for vibration damping and noise reducing
Technical field
It is hollow more particularly, to a kind of aluminum oxide for vibration damping and noise reducing the present invention relates to damping material technical field Ball.
Background technology
In recent years, with the development of modern industry, vibration and noise bring more and more to the normal development of economic society Negative influence, therefore, people it is continuous explore and research vibration and noise reducing approach.
In terms of damping vibration attenuation, now mainly there are two kinds of approach：One kind is design and uses damping vibration attenuation structure；It is another to be Develop and use high damping material.The general principle of damping is energy loss, thus various dampings be all around how The vibrational energy that is stimulated is converted into the energy (such as heat energy, deformation energy) of other forms and system is returned to the shape before being excited as early as possible State.
Embedding Material is a kind of damping material, for being filled into the internal cavity in the parts in plant equipment, for example： In the cavity in steel pipe in plant equipment, in the cavity in hollow wall in plant equipment, damping structure is constituted, can be notable Ground carries out vibration and noise reducing to the plant equipment.
For Embedding Material, traditional polymer damping capacity is preferable, but its density is higher；Foam plastic density is low, And have certain damping capacity, but there is intensity difference, chemical blowing forming process and the defect such as be difficult to control to, therefore in order to reduce The density of polymeric material, while can have certain damping capacity again, is changed using alumina hollow ball to epoxy resin Property, a kind of alumina hollow ball epoxy resin composite material is obtained, it belongs to particle reinforced epoxy composite.Aluminum oxide The one of the main reasons of hollow ball epoxy resin composite material failure is alumina hollow ball rupture.
The preparation method of alumina hollow ball has a lot, wherein popular is template, such as：Using colloidal carbon sphere as The template of template+absorption prepares alumina hollow ball：Using ethanol as solvent, 0.4molL is prepared-1Aluminum nitrate solution, take 60mL aluminum nitrate solution, is added after 0.2g colloidal carbon spheres (diameter is about 600nm), ultrasonic 20min at 25 DEG C (adsorption temps) Lower standing 8h (adsorption time), so that colloidal carbon sphere is to the Al in solution3+Fully adsorbed, solution be then subjected to suction filtration, Gained solid is put into 80 DEG C of baking ovens and dried, and is then calcined dry powder, its calcination process is, in nitrogen atmosphere Under, 3h is calcined at 330 DEG C and 440 DEG C respectively, then at 550 DEG C, oxygen atmosphere calcining 3h, products obtained therefrom is aluminum oxide Hollow ball, the average grain diameter of gained alumina hollow ball is 250nm, and its shell wall thickness is about 20nm.
Carefully check above-mentioned preparation method, it should be apparent that, there is following problem：
1. manufacturing cycle is oversize, such a small amount of raw material, its adsorption time wants 8h, and calcination time wants 9h, adds up and is exactly 17h, will not be shorter than the manufacturing cycle certainly when industrialization large-scale production；2. after the completion of colloidal carbon sphere absorption, target production The wall thickness of product alumina hollow ball is just approximately fixed constant, and in nitrogen calcination process, colloidal carbon sphere can gasify to be worn out of shell Saturating shell wall is gone to outside shell, it is clear that now the shell wall of so big thickness can extend the time of break-through of the gasification gas of colloidal carbon sphere, in oxygen In gas calcination process, oxygen outside shell can the outermost aluminum particulate of initial oxidation, most then gradually inwardly diffusion, at last whole wall thickness Aluminum particulate be fully oxidized to aluminum oxide, it is clear that now the shell wall of so big thickness can extend the oxidized diffusion time of oxygen；3. Calcining heat is too low, and maximum temperature only has to be spent more 500, and calcining herein in fact is similar to the firing of pottery and porcelain, pottery Firing temperature is than relatively low, at 700 DEG C -800 DEG C, and pottery not enough causes frangible with regard to hardness strength, and the firing temperature of porcelain is higher, At 1100 DEG C -1400 DEG C, the hardness strength of porcelain is just higher, and calcining heat only has and spent 500 more herein, than the firing temperature of pottery Degree is also low, it is clear that the intensity hardness height for the alumina hollow ball that calcining is obtained is not gone thereunto, causes alumina hollow ball easy Rupture；4. colloidal carbon sphere relies on electrostatic force by the Al in solution3+Onto itself, electrostatic is neutralized for absorption, and aluminium ion becomes aluminium atom, Therefore, oxidizing roasting process below is similar to the oxidation and sinter in powder metallurgy, simply in powder metallurgy before sintering Can be compressing to cause the thing to be sintered before sintering to be a fine and close thing by high pressure by loose powder, but oxygen herein Aluminium atom is not suppressed before changing calcining, that is, the aluminium atom adsorbed on colloidal carbon sphere is loose, simple folded Plus state, exactly because the also reason so that after the completion of calcining, the average grain diameter of obtained alumina hollow ball only has 250nm, the colloidal carbon sphere compared to 600nm reduces 60%, and cubical contraction is very big, causes obtained alumina hollow ball Particle diameter be not easily controlled very much, be very easy to influenceed by technological parameter, cause the shell wall of alumina hollow ball shrinking greatly It is very easy to collapse in the contraction process of rate, collapsing can cause the internal face of alumina hollow ball to connect, obtains solid Alumina balls, rather than hollow ball, furthermore the aluminum oxide obviously obtained after the aluminium atom calcining of loose, simple superposition state The intensity hardness height of hollow ball is not gone thereunto, causes alumina hollow ball to be easily broken.
Therefore, the manufacturing cycle of alumina hollow ball how is reduced, the intensity hardness of alumina hollow ball, Jin Erti is improved The damping capacity and service life of high-alumina hollow ball epoxy resin composite material are those skilled in the art's urgent need to resolve Technical problem.
The content of the invention
It is an object of the invention to provide a kind of alumina hollow ball for vibration damping and noise reducing, the alumina hollow ball Manufacturing cycle it is shorter, intensity hardness is higher, it is possible to increase the damping capacity of alumina hollow ball epoxy resin composite material with And service life.
To solve above-mentioned technical problem, the technical scheme that the present invention is provided is：
A kind of alumina hollow ball for vibration damping and noise reducing, including thin-walled alumina hollow ball and mixed sintering Layer；
The thin-walled alumina hollow ball be use using colloidal carbon sphere as template and by silicon source and Al adsorption of aluminum nitrate from Thin-walled alumina hollow ball made from the template of son；
Mixed sintering layer is by the way that pelletizing, isostatic cool pressing be compressing and powder sintered obtained basalt fibre With the mixed sintering layer of alumina powder；
The mixed sintering layer is coated on the whole spherical outside surface of the thin-walled alumina hollow ball, and the mixed sintering It is powder sintered connection between layer and the spherical outside surface of the thin-walled alumina hollow ball；
The alumina hollow ball includes the cavity wrapped up in spherical shell and the spherical shell, the ball of the alumina hollow ball Shell is to pass through the powder sintered integral type connected and composed by the spherical shell of the thin-walled alumina hollow ball and mixed sintering layer Structure；
The basalt fibre is embedded in the mixed sintering layer.
It is preferred that, the particle diameter of the alumina hollow ball is 100 μm~200 μm, and the wall thickness of the alumina hollow ball is 5 μm~10 μm.
It is preferred that, the particle diameter of the alumina powder is 200nm~250nm.
It is preferred that, the length of the basalt fibre is 1.0 μm~15 μm.
It is preferred that, the wall thickness of the thin-walled alumina hollow ball for the wall thickness of the alumina hollow ball 30%~ 40%.
This application provides a kind of alumina hollow ball for vibration damping and noise reducing, including thin-walled alumina hollow ball with And mixed sintering layer；The mixed sintering layer is coated on the whole spherical outside surface of the thin-walled alumina hollow ball, and described mixed It is powder sintered connection to close between sinter layer and the spherical outside surface of the thin-walled alumina hollow ball；The ball of the alumina hollow ball Shell is to pass through the powder sintered integral type connected and composed by the spherical shell of the thin-walled alumina hollow ball and mixed sintering layer Structure；The basalt fibre is embedded in the mixed sintering layer；Use first using colloidal carbon sphere as template and with aluminum nitrate For silicon source and adsorb aluminum ions template thin-walled alumina hollow ball be made, during control technological parameter to cause thin-walled oxygen Change aluminium hollow ball wall thickness for alumina hollow ball wall thickness 30%~40%, then again using the thin-walled alumina hollow ball as Ball carries out pelletizing, sinters one layer on the spherical outside surface of the thin-walled alumina hollow ball by PM technique and is blended with the Black Warrior The alumina powder of rock fiber, with the thickness of basalt fibre and the sinter layer of alumina powder come polishing alumina hollow ball Remaining the 60%~70% of wall thickness；The wall thickness of thin-walled alumina hollow ball is smaller, so that reducing template prepares thin-walled The manufacturing cycle of alumina hollow ball, the gasification gas for reducing colloidal carbon sphere penetrates the shell wall of thin-walled alumina hollow ball and penetrated Time, oxidized diffusion time of the oxygen in the shell wall of thin-walled alumina hollow ball is reduced, it is fine using high temperature sintering basalt Dimension and the mixture of alumina powder, and it is compressing using isostatic cool pressing, the intensity hardness of sintered product is improved, is subtracted significantly Shrinkage factor in small sintering process, will not collapse, so as to reduce the manufacturing cycle of alumina hollow ball, improve aluminum oxide The intensity hardness of hollow ball, and then improve the damping capacity of alumina hollow ball epoxy resin composite material and use the longevity Life.
Embodiment
For a further understanding of the present invention, the preferred embodiment of the invention is described with reference to embodiment, still It should be appreciated that these descriptions simply further illustrate the feature and advantage of the present invention, rather than to the limit of the claims in the present invention System.
This application provides a kind of alumina hollow ball for vibration damping and noise reducing, including thin-walled alumina hollow ball with And mixed sintering layer；
The thin-walled alumina hollow ball be use using colloidal carbon sphere as template and by silicon source and Al adsorption of aluminum nitrate from Thin-walled alumina hollow ball made from the template of son；
Mixed sintering layer is by the way that pelletizing, isostatic cool pressing be compressing and powder sintered obtained basalt fibre With the mixed sintering layer of alumina powder；
The mixed sintering layer is coated on the whole spherical outside surface of the thin-walled alumina hollow ball, and the mixed sintering It is powder sintered connection between layer and the spherical outside surface of the thin-walled alumina hollow ball；
The alumina hollow ball includes the cavity wrapped up in spherical shell and the spherical shell, the ball of the alumina hollow ball Shell is to pass through the powder sintered integral type connected and composed by the spherical shell of the thin-walled alumina hollow ball and mixed sintering layer Structure；
The basalt fibre is embedded in the mixed sintering layer.
Present invention also provides a kind of preparation method of the above-mentioned alumina hollow ball for vibration damping and noise reducing, including with Lower step：
1) thin-walled alumina hollow ball is prepared：Use using colloidal carbon sphere as template and by silicon source and Al adsorption of aluminum nitrate from The template of son, which is made in thin-walled alumina hollow ball, preparation process, to be controlled technological parameter to cause thin-walled alumina hollow ball Wall thickness is the 30%~40% of the wall thickness of alumina hollow ball；
2) pelletizing：Take paraffin to be dissolved in ethanol, liquid adhesive is made；
Liquid adhesive and basalt fibre are mixed with alumina powder；
Using step 1) in obtained thin-walled alumina hollow ball as ball, it is in palletizing device that thin-walled aluminum oxide is hollow Ball is contacted with the mixture of liquid adhesive, basalt fibre and alumina powder, using palletizing device so that thin-walled is aoxidized The mixing of liquid adhesive, basalt fibre and alumina powder is coated with the spherical outside surface of aluminium hollow ball by bonding connection Thing simultaneously eventually becomes sphere；
3) to step 2) obtained sphere heated to remove ethanol；
4) isostatic cool pressing is compressing：By step 3) the middle sphere input only upper opening of pressure removed after ethanol In water in container, then it can be moved up and down using the upper end open and the closure of seal cap sealing pressure vessel, so The closure is pushed using external force afterwards the water in pressure vessel is pressurizeed, the pressure produced by closure is pushed can lead to The transmission for crossing water is compressing to the sphere progress isostatic cool pressing in water；
5) to step 4) in isostatic cool pressing it is compressing after sphere be thermally dried dehydration；
6) sinter：By step 5) in drying and dehydrating after sphere be sintered in a nitrogen atmosphere, sintering temperature is 1100 DEG C~1400 DEG C, alumina hollow ball is made.
Above-mentioned steps 1) in, use using colloidal carbon sphere as template and using aluminum nitrate as silicon source and the aluminum ions template of absorption Thin-walled alumina hollow ball is prepared, is ripe prior art, the application is not done to its concrete technology step and technological parameter Limitation, using prior art；Technological parameter is controlled in preparation process to cause the wall thickness of thin-walled alumina hollow ball as oxygen Change the 30%~40% of the wall thickness of aluminium hollow ball, technological parameter herein be mainly adsorption time, adsorption temp, calcination time with And calcining heat；Thin-walled alumina hollow ball is intended only as pelletizing ball herein, and its wall thickness is relatively thin, therefore, adsorption time and Calcination time can be greatly reduced, so that the manufacturing cycle of thin-walled alumina hollow ball is shortened, and finally more or less The whole manufacturing cycle of alumina hollow ball can be shortened；Thin-walled alumina hollow ball is intended only as pelletizing ball herein, its wall thickness Relatively thin, therefore, so thin wall thickness can substantially reduce the time of break-through of the gasification gas of colloidal carbon sphere, and so thin wall thickness can be reduced The oxidized diffusion time of oxygen, so as to shorten the manufacturing cycle of thin-walled alumina hollow ball, and finally it can more or less contract The whole manufacturing cycle of short alumina hollow ball.
Above-mentioned steps 2) in, liquid adhesive and basalt fibre are mixed with alumina powder, basalt fibre with Alumina powder is sintered together, and the two sintering is structure as a whole；The oxidized calcining of thin-walled alumina hollow ball is formed, and it is oxidation Aluminium material, what is coated below is also alumina powder, and the two is identical material, in the sintered of 1100 DEG C below~1400 DEG C Cheng Zhong, the spherical outside surface of thin-walled alumina hollow ball can occur sintering with the alumina powder being coated on thereon and be connected, therebetween Be not in obvious layering, therefore, the spherical shell of the alumina hollow ball finally given is integral type structure, its interior no point Layer, integral type shell wall structure causes alumina hollow ball to have higher hardness strength；Therefore, above-mentioned basalt fibre is embedding Put in the spherical shell of alumina hollow ball, form fibre strengthening, further increasing the hardness strength of alumina hollow ball, Reduce the rupture of alumina hollow ball.
Above-mentioned steps 2) in, the binding agent paraffin of addition can in step 5) and step 6) in heating-up temperature under gradually Gasification volatilization, so as to be removed.
Above-mentioned steps 4) in, using the compressing technology of isostatic cool pressing to being coated on the spherical outside surface of thin-walled alumina hollow ball On liquid adhesive, the mixture of basalt fibre and alumina powder suppressed so that basalt fibre and oxygen The cladding mixture for changing aluminium powder is not loose, simple superposition state, is the densifie state after compacting, and the densifie state shows Obvious volume contraction will not occur for sphere before and after so causing high temperature sintering, substantially reduce the shrinkage factor in sintering process, It will not collapse so that the particle diameter of alumina hollow ball is easier control, the densifie state obviously can also significantly improve sintered product Hardness and intensity, reduce the rupture of alumina hollow ball.
Above-mentioned steps 6) in, using 1100 DEG C~1400 DEG C of sintering high temperature, to fine and close basalt fibre and oxidation The cladding mixture of aluminium powder is sintered, and sintering temperature is sufficiently high, can significantly improve the hardness and intensity of sintered product, is reduced The rupture of alumina hollow ball.
In one embodiment of the invention, step 1) in, the aluminum nitrate solution is using ethanol as solvent, and concentration is 0.4mol·L-1。
In one embodiment of the invention, step 3) in, sphere is heated to remove the heating-up temperature of ethanol For 30 DEG C~35 DEG C.
In one embodiment of the invention, step 4) in, the compressing pressure of isostatic cool pressing be 0.5MPa~ 10MPa, forming pressure should not be big as the forming pressure generally used in PM technique herein, excessive forming pressure It can will be used as the thin-walled alumina hollow ball pressure break of ball, it should use smaller forming pressure.
In one embodiment of the invention, step 5) in, sphere of the isostatic cool pressing after compressing is heated The heating-up temperature of drying and dehydrating is 200 DEG C~400 DEG C.
In one embodiment of the invention, step 6) in, sintering time is 1h~2h.
In one embodiment of the invention, the particle diameter of the alumina hollow ball is 100 μm~200 μm, the oxidation The wall thickness of aluminium hollow ball is 5 μm~10 μm.
In one embodiment of the invention, the particle diameter of the alumina powder is 200nm~250nm.
In one embodiment of the invention, the length of the basalt fibre is 1.0 μm~15 μm.
The method and apparatus of the not detailed description of the present invention are prior art, are repeated no more.
For a further understanding of the present invention, vibration damping and noise reducing is used for one kind that the present invention is provided with reference to embodiment The preparation method of alumina hollow ball be described in detail, protection scope of the present invention is not limited by the following examples.
Embodiment 1
A kind of preparation method of alumina hollow ball for vibration damping and noise reducing, comprises the following steps：
1) thin-walled alumina hollow ball is prepared：Use using colloidal carbon sphere as template and by silicon source and Al adsorption of aluminum nitrate from The template of son, which is made in thin-walled alumina hollow ball, preparation process, to be controlled technological parameter to cause thin-walled alumina hollow ball Wall thickness is the 35% of the wall thickness of alumina hollow ball；
The aluminum nitrate solution is using ethanol as solvent, and concentration is 0.4molL-1；
2) pelletizing：Take paraffin to be dissolved in ethanol, liquid adhesive is made；
Liquid adhesive and basalt fibre are mixed with alumina powder；
Using step 1) in obtained thin-walled alumina hollow ball as ball, it is in palletizing device that thin-walled aluminum oxide is hollow Ball is contacted with the mixture of liquid adhesive, basalt fibre and alumina powder, using palletizing device so that thin-walled is aoxidized The mixing of liquid adhesive, basalt fibre and alumina powder is coated with the spherical outside surface of aluminium hollow ball by bonding connection Thing simultaneously eventually becomes sphere；
The particle diameter of the alumina powder is 225nm；
The length of the basalt fibre is 2.5 μm；
3) to step 2) obtained sphere heated to remove ethanol；
Sphere is heated using the heating-up temperature for removing ethanol as 32 DEG C；
4) isostatic cool pressing is compressing：By step 3) the middle sphere input only upper opening of pressure removed after ethanol In water in container, then it can be moved up and down using the upper end open and the closure of seal cap sealing pressure vessel, so The closure is pushed using external force afterwards the water in pressure vessel is pressurizeed, the pressure produced by closure is pushed can lead to The transmission for crossing water is compressing to the sphere progress isostatic cool pressing in water；
The compressing pressure of isostatic cool pressing is 2MPa；
5) to step 4) in isostatic cool pressing it is compressing after sphere be thermally dried dehydration；
The heating-up temperature that dehydration is thermally dried to sphere of the isostatic cool pressing after compressing is 350 DEG C；
6) sinter：By step 5) in drying and dehydrating after sphere be sintered in a nitrogen atmosphere, sintering temperature is 1200 DEG C, alumina hollow ball is made.
Step 6) in, sintering time is 2h.
The particle diameter of the alumina hollow ball is 120 μm, and the wall thickness of the alumina hollow ball is 10 μm.
Specific embodiment used herein is set forth to the principle and embodiment of the present invention, above example Illustrate the method and its core concept for being only intended to help to understand the present invention.It should be pointed out that for the common skill of the art For art personnel, under the premise without departing from the principles of the invention, some improvement and modification can also be carried out to the present invention, these change Enter and modify to also fall into the protection domain of the claims in the present invention.

Claims (5)

1. a kind of alumina hollow ball for vibration damping and noise reducing, it is characterised in that including thin-walled alumina hollow ball with And mixed sintering layer；
The thin-walled alumina hollow ball is to use using colloidal carbon sphere as template and so that aluminum nitrate is silicon source and absorption is aluminum ions Thin-walled alumina hollow ball made from template；
Mixed sintering layer is by the way that pelletizing, isostatic cool pressing be compressing and powder sintered obtained basalt fibre and oxygen Change the mixed sintering layer of aluminium powder；
Mixed sintering layer is coated on the whole spherical outside surface of the thin-walled alumina hollow ball, and mixed sintering layer with It is powder sintered connection between the spherical outside surface of the thin-walled alumina hollow ball；
The alumina hollow ball includes the cavity wrapped up in spherical shell and the spherical shell, and the spherical shell of the alumina hollow ball is The powder sintered integral structure connected and composed is passed through by the spherical shell and mixed sintering layer of the thin-walled alumina hollow ball；
The basalt fibre is embedded in the mixed sintering layer.
2. alumina hollow ball according to claim 1, it is characterised in that the particle diameter of the alumina hollow ball is 100 μ M~200 μm, the wall thickness of the alumina hollow ball is 5 μm~10 μm.
3. alumina hollow ball according to claim 1, it is characterised in that the particle diameter of the alumina powder is 200nm ~250nm.
4. alumina hollow ball according to claim 1, it is characterised in that the length of the basalt fibre is 1.0 μm ~15 μm.
5. alumina hollow ball according to claim 1, it is characterised in that the wall thickness of the thin-walled alumina hollow ball is The 30%~40% of the wall thickness of the alumina hollow ball.
CN201710493153.8A 2017-06-26 2017-06-26 Alumina hollow ball for damping vibration attenuation and noise reduction Expired - Fee Related CN107216160B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710493153.8A CN107216160B (en) 2017-06-26 2017-06-26 Alumina hollow ball for damping vibration attenuation and noise reduction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710493153.8A CN107216160B (en) 2017-06-26 2017-06-26 Alumina hollow ball for damping vibration attenuation and noise reduction

Publications (2)

Publication Number Publication Date
CN107216160A true CN107216160A (en) 2017-09-29
CN107216160B CN107216160B (en) 2020-05-12

Family

ID=59951197

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710493153.8A Expired - Fee Related CN107216160B (en) 2017-06-26 2017-06-26 Alumina hollow ball for damping vibration attenuation and noise reduction

Country Status (1)

Country Link
CN (1) CN107216160B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112151000A (en) * 2020-10-16 2020-12-29 成都师范学院 Basalt fiber optimized sound-absorbing hole structure material and preparation method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112151000A (en) * 2020-10-16 2020-12-29 成都师范学院 Basalt fiber optimized sound-absorbing hole structure material and preparation method thereof
CN112151000B (en) * 2020-10-16 2023-09-19 成都师范学院 Basalt fiber optimized sound absorption hole structural material and preparation method thereof

Also Published As

Publication number Publication date
CN107216160B (en) 2020-05-12

Similar Documents

Publication Publication Date Title
RU2605977C2 (en) Synthetic proppants and monodisperse proppants and methods for production thereof
CN104909820B (en) Porous ceramics that duct uniformly penetrates and its production and use
US10161236B2 (en) Methods for fracturing subterranean formations
CN103130525B (en) Making method of high-toughness porous SiC ceramic complex part
CN108178656B (en) High-porosity porous ceramic microsphere and preparation method thereof
CN107827458A (en) A kind of technique for preparing zirconia ceramics using oscillation pressure sintering process
CN110743626B (en) Method for 3D printing of porous catalytic device and porous catalytic device
CN110668813A (en) Preparation method of nano zirconia granulated powder
CN105948781B (en) A kind of preparation method of high opening rate porous silicon carbide ceramic material
CN109970439A (en) A kind of preparation method of light ceramics composite sheet
CN107602127A (en) SiC hollow sphere and preparation method thereof
CN103342576A (en) Preparation method of nanocomposite Al2O3 ceramic filter element
CN101838153A (en) Molding method of mullite fiber reinforced magnesium silicate ceramic matrix composite material
CN107216160A (en) A kind of alumina hollow ball for vibration damping and noise reducing
RU2490230C2 (en) Method of powder metallurgy for manufacturing fire-proof ceramic material
CN107098367B (en) A kind of preparation method of alumina hollow ball for vibration damping and noise reducing
CN110467384B (en) Lightweight high-strength concrete and preparation method thereof
CN116692848A (en) Preparation method of high-density isostatic pressing graphite
CN107721259B (en) High-performance water permeable brick
CN109650925A (en) A kind of light ceramics composite sheet
CN104496487B (en) Double-layer ceramic microsphere of nucleocapsid structure and preparation method thereof
Qian et al. Preparation of biomorphic TiO2 ceramics from rattan templates
CN113979780A (en) Porous zirconia ceramic and preparation method thereof
CN109020489B (en) Method for manufacturing hollow brick by casting waste sand
CN110015898A (en) A kind of graphite sealing material and preparation method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20200512

Termination date: 20210626

CF01 Termination of patent right due to non-payment of annual fee