CN108314430A - A kind of Cellulose nanocrystal modified ceramic curtain coating green body and preparation method thereof - Google Patents
A kind of Cellulose nanocrystal modified ceramic curtain coating green body and preparation method thereof Download PDFInfo
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- CN108314430A CN108314430A CN201810203957.4A CN201810203957A CN108314430A CN 108314430 A CN108314430 A CN 108314430A CN 201810203957 A CN201810203957 A CN 201810203957A CN 108314430 A CN108314430 A CN 108314430A
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- 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
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- 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
- C04B35/63—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 using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
- C04B35/636—Polysaccharides or derivatives thereof
- C04B35/6365—Cellulose or derivatives thereof
Abstract
The present invention relates to a kind of Cellulose nanocrystal modified ceramics to be cast green body and preparation method thereof, wherein, the component of the slurry of the green body and the mass percentage of each component include, ceramic powder 40 70%, Cellulose nanocrystal 0.01 5%, binder 1 8%, plasticizer 0.1 5%, dispersant 0.1 2.5%, antifoaming agent 0.01 0.5%, surplus is deionized water.The present invention is for aqueous-based ceramic cast sheet intensity is low, flexibility is poor, the easy chipping problems of crack of process, by the component and content that change the slurry of green body, Cellulose nanocrystal is added in being cast green body, the technical issues of intensity and flexibility for significantly improving material, the chipping cracking that efficiently solves that ceramics curtain coating blank strength is low, flexibility is poor, to cut process easy.
Description
Technical field
The present invention relates to a kind of Cellulose nanocrystal modified ceramics to be cast green body and preparation method thereof, belongs to high-performance ceramics
Field, to solve, aqueous-based ceramic cast sheet intensity is low, flexibility is poor, the easy chipping problems of crack of process.
Background technology
With the development of the miniaturization of electronic equipment, lightweight, high performance and surface installation technique, electronic element
High density surface assemble and rapidly developed, the especially fast development of mobile communication, computer and large-screen color TV, to electricity
Subcomponent forms great demand.
In the production technology of chip electronic device, curtain coating technology of preparing due to it is easy to operate, can continuous production, automatic
The advantages that change degree is high and production efficiency is high and the preparation for being widely used in ceramic chip product, especially have become and prepare Boping
Face, large area ceramic material important method.
The tape casting is called tape casting method, scraper method, is widely used in the moulding process of ceramic material.
The tape casting technical process：Ready ceramic powder, binder, plasticizer, dispersant, solvent are mixed, make it uniformly,
Slurry is put into the hopper of casting machine again, slurry is flow to from hopper lower part on the conveyer belt of casting machine, and thickness is controlled with scraper,
It is dried again through the methods of infrared heating, obtains film base, finally film base is cut according to demand or punching.
Organic curtain coating using organic matter as solvent is mostly used both at home and abroad at present to prepare ceramic green, prepared by organic curtain coating
Ceramic green structure it is uniform, intensity is high, flexibility is good, convenient for cutting and processing, but due to being used in organic casting technique
A large amount of toxic, inflammable organic solvents (toluene, diethylbenzene etc.), and production cost serious to human body and environmental pollution are high.This
Outside, high organic content in ceramic body easily causes blank cracking during follow-up dumping.Therefore, people start in recent years
Water-based tape casting system is studied, the system is at low cost, safe to use hygienic, nontoxic and environmentally safe using water as solvent, can
Realize greenization production.That there are intensity is low for ceramic body prepared by water base casting process, flexibility is poor, cut during easily open
The problems such as splitting.Therefore, searching can improve water-based tape casting ceramic body intensity and flexibility is the key technology of current urgent need to resolve
One of problem has far-reaching influence to the development of china industry.
In the prior art, mainly by the way that reinforcing agent (Sodium Polyacrylate, methacrylic acid copolymer are added in ceramic body
Object, polyvinyl alcohol, polyethylene glycol oxide etc.) and plasticizer (carboxymethyl cellulose, hydroxylmethyl cellulose or dibutyl phthalate or
Glycerine) come improve ceramics curtain coating green body intensity and flexibility.But the dosage of reinforcing agent and plasticizer can only be in certain model
Enclose interior adjusting, reinforcing agent and the very few activeness and quietness effect unobvious to ceramic body of plasticizer additive amount, reinforcing agent and plasticising
The excessive viscosity for leading to slurry of the additive amount of agent steeply rises, and increases the operation difficulty of tape casting, slurry can not when serious
Carry out tape casting operation.
Invention content
It is a primary object of the present invention to provide a kind of Cellulose nanocrystal modified ceramic curtain coating green body and its preparation side
Method, the present invention pass through change for aqueous-based ceramic cast sheet intensity is low, flexibility is poor, the easy chipping problems of crack of process
The component and content of the slurry of green body are added Cellulose nanocrystal in being cast green body, significantly improve the intensity of material
The technical issues of flexibility, the chipping cracking that efficiently solves that ceramics curtain coating blank strength is low, flexibility is poor, to cut process easy.
The object of the invention to solve the technical problems is realized using following technical scheme.
A kind of ceramics curtain coating green body proposed according to the present invention, the component of the slurry of the green body and the quality hundred of each component
Point content includes ceramic powder 40-70%, Cellulose nanocrystal 0.01-5%, binder 1-8%, plasticizer 0.1-5%, point
Powder 0.1-2.5%, antifoaming agent 0.01-0.5%, surplus are deionized water.
The object of the invention to solve the technical problems also can be used following technical measures and further realize.
Preferably, a kind of ceramics curtain coating green body above-mentioned, wherein the Cellulose nanocrystal is diameter 3-20nm, length
The club shaped structure of 200-400nm.
Preferably, a kind of ceramics curtain coating green body above-mentioned, wherein the Cellulose nanocrystal includes unmodified fiber
One during element is nanocrystalline, Tempo celluloses are nanocrystalline, Cationic celluloses are nanocrystalline, sulfonated cellulose is nanocrystalline
Kind or two or more combinations.
Preferably, a kind of ceramics curtain coating green body above-mentioned, wherein the ceramic powder includes oxide ceramic, nitridation
The combination of one or more of object ceramic powder, carbide ceramics powder, silicide ceramics powder, polynary electronic ceramics powder.
Preferably, a kind of ceramics curtain coating green body above-mentioned, wherein the dispersant includes acrylic resin, polyacrylic acid
The combination of one or more of salt, polyethyleneimine or ammonium polymethacrylate；Alternatively, the antifoaming agent is to have
Machine silicon defoaming agent.
Preferably, a kind of ceramics curtain coating green body above-mentioned, wherein the binder is styrene-butadiene latex, they
The combination of one or more of liquid, aqueous epoxy resin emulsion, polyethyl acrylate lotion or polyvinyl alcohol；Alternatively,
The plasticizer is association type polyurethanes, polyacrylic, carboxymethyl cellulose, hydroxylmethyl cellulose, phthalic acid two
The combination of one or more of butyl ester or glycerine.
The object of the invention to solve the technical problems is also realized using technical solution below.
A kind of preparation method of the ceramics curtain coating green body proposed according to the present invention, including, Cellulose nanocrystal and water are mixed
It closes, obtains Cellulose nanocrystal suspension；Ceramic powder, dispersant, antifoaming agent are added to the Cellulose nanocrystal to hang
In supernatant liquid, pH to 9-11 is adjusted, the first stirring is carried out, obtains ceramic powder-sintering aid-Cellulose nanocrystal suspension；To
Binder, plasticizer are added in the ceramic powder-sintering aid-Cellulose nanocrystal suspension, carries out the second stirring, the
After the completion of two stirrings, de-bubble 5-30min under conditions of vacuum degree is 0.1Pa-5Pa obtains slurry；The slurry is carried out
Curtain coating processing, drying obtain the ceramics curtain coating green body.
The object of the invention to solve the technical problems also can be used following technical measures and further realize.
Preferably, the preparation method of a kind of ceramics curtain coating green body above-mentioned, wherein the mixing speed of first stirring
For 400-600r/min, mixing time 10-12h；Alternatively, the mixing speed of second stirring is 300-450r/min,
Mixing time is 1-3h.
Preferably, the preparation method of a kind of ceramics curtain coating green body above-mentioned, wherein the process of the drying is followed successively by 30-
0.1-0.5h is dried at 60 DEG C, and 0.1-0.5h is dried at 60-100 DEG C, 0.2-1h, 30-70 DEG C of drying are dried at 100-180 DEG C
0.1-0.5h。
By above-mentioned technical proposal, a kind of Cellulose nanocrystal modified ceramic curtain coating green body provided by the invention and its preparation
Method at least has following advantages：
1, ceramics curtain coating blank strength provided by the invention is high, flexibility is good, not easy to crack in process.
Cellulose nanocrystal is added in the slurry of ceramics curtain coating green body provided by the invention.Cellulose nanocrystal is from day
The nano-particle extracted by the methods of sour water solution in right cellulose fibre, have derive from a wealth of sources, high intensity, high-crystallinity, height
The characteristics such as elasticity modulus, Rod-like shape, in addition with the lightweight of biological material, degradable, biocompatibility and renewable etc.
Characteristic is suitble to be filled in high-performance composite materials.It is rich in negative electrical charge group from the Cellulose nanocrystal surface that sulphuric acid hydrolysis extracts,
There is good dispersion in aqueous solution with electrostatic repulsion effect.The unique Rod-like shape of Cellulose nanocrystal, passes through Fiber Bridge
The effects that joining, pulling out, mechanism was remarkably improved the intensity and flexibility of ceramic body.
Great amount of hydroxy group is contained on Cellulose nanocrystal surface, forms hydrogen bond with the ceramic grain surface of aquation, is remarkably improved
The mechanical property of ceramic body.For example, when the mass percentage of Cellulose nanocrystal in slurry is 0.1%, biscuit of ceramics
Tensile strength can reach 80KPa, the biscuit for being relatively not added with Cellulose nanocrystal improves 40%, improves the strong of ceramic body
Degree.
The unique club shaped structure of Cellulose nanocrystal is remarkably improved green body by mechanism the effects that fiber-bridged, extraction
Flexibility, it is dry after ceramic body (3mm × 4mm × 65mm) three-point bending deflection maximum value can be promoted to 10mm, more not
The sample of addition Cellulose nanocrystal improves 100%, and biscuit flexibility significantly improves, and overcomes aqueous tape casting forming ceramic blank
Body is cutting, is being susceptible to the problem of cracking in perforation processing, can directly be processed, enormously simplify to ceramics curtain coating green body
Industrial process stream improves production efficiency.
Cellulose nanocrystal extraction process is ripe, and raw material sources are abundant, nontoxic, renewable, are applied to tape casting
Field assigns ceramic body excellent mechanical property, improves its machinability, further widen its application field.The invention
A kind of new method is provided for aqueous tape casting forming, industrial application can be carried out.
Above description is only the general introduction of technical solution of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, it is described in detail as after with presently preferred embodiments of the present invention below.
Specific implementation mode
It is of the invention to reach the technological means and effect that predetermined goal of the invention is taken further to illustrate, below in conjunction with
Preferred embodiment is cast green body and preparation method thereof to a kind of Cellulose nanocrystal modified ceramic proposed according to the present invention,
Specific implementation mode, structure, feature and its effect are described in detail as after.In the following description, different " embodiment " or
What " embodiment " referred to is not necessarily the same embodiment.In addition, special characteristic, structure or feature in one or more embodiments can be by
Any suitable form combination.
The slurry of ceramics curtain coating green body provided by the invention includes ceramic powder, Cellulose nanocrystal, binder, plasticising
Agent, dispersant, antifoaming agent etc..
In the slurry of ceramic body of the present invention, the addition of Cellulose nanocrystal, improve ceramics curtain coating green body intensity and
The technical issues of flexibility etc., the chipping cracking that efficiently solves that ceramics curtain coating blank strength is low, flexibility is poor, to cut process easy.
Cellulose nanocrystal of the present invention can be that unmodified cellulose is nanocrystalline, can also be Tempo chemical fibres
The modified Cellulose nanocrystals such as dimension element is nanocrystalline, Cationic celluloses are nanocrystalline, sulfonated cellulose is nanocrystalline.It is preferred that
, when the Cellulose nanocrystal is that unmodified cellulose is nanocrystalline, the quality hundred of the Cellulose nanocrystal in slurry
It is 0.01-5% to divide content；When the Cellulose nanocrystal is that Tempo celluloses are nanocrystalline, the cellulose is received in slurry
The mass percentage of meter Jing is 0.01-4%；When the Cellulose nanocrystal is that Cationic celluloses are nanocrystalline,
The mass percentage of the Cellulose nanocrystal is 0.01-4% in slurry；When the Cellulose nanocrystal is sulfonated fiber
When element is nanocrystalline, the mass percentage of the Cellulose nanocrystal is 0.01-4% in slurry.It should be noted that institute of the present invention
The Tempo celluloses stated are nanocrystalline be the oxidation of 2,2,6,6- tetramethyl piperidines Cellulose nanocrystal；It is of the present invention
The nanocrystalline Cellulose nanocrystal for cationization of Cationic celluloses.
In the preparation method of ceramics curtain coating green body provided by the invention, it is dried using gradient seasoning.Specifically, adopting
Green body is dried with the gradient drying mode of heating-heating-heating-cooling.The drying means, reduces ceramic body
Dehydrating speed has further prevented the cracking of green body.
Embodiment 1
1) use diameter 3-20nm, length be 200-400nm unmodified celluloses it is nanocrystalline be raw material, prepare quality point
The suspension that number is 0.1%；
2) the accurate unmodified fibers element nanocrystal suspension 36g for weighing mass fraction 0.1%, is added into suspension
Ammonium polyacrylate 2g, aluminium oxide ceramics powder (content >=99%, D50=1 μm) 50g, antifoaming agent 0.1g, pH=is adjusted with concentrated ammonia liquor
10-2, stirring 12h obtains slurry under conditions of low whipping speed is 500r/min；
3) polyvinyl alcohol 7g is added into slurry as binder, 2g glycerine as plasticizer, low whipping speed is
1h is stirred under conditions of 300r/min, then vacuum degree is de-bubble 15min under conditions of 2Pa, obtains slurry；
4) slurry is cast on casting machine with the speed of 0.5cm/s, obtained wet film dry 10min at 60 DEG C, 100
10min is dried at DEG C, and 15min is dried at 150 DEG C, 6min is dried at 60 DEG C, obtains ceramic body.
Comparative example 1
Accurately weigh 36g deionized waters, remaining repeat embodiment 1 in the 2nd, 3,4 steps, the ceramic green of system.
The ceramic body tensile strength being modified after tested through Cellulose nanocrystal in embodiment 1 is increased to 80.12KPa, compared with
Ceramic body tensile strength improves 40.21% in comparative example 1 under same condition；It is modified through Cellulose nanocrystal in embodiment 1
Ceramic blank drying after three-point bending deflection maximum value be 7.5mm, compared with the ceramic body three in comparative example under same condition 1
Point bending deformation quantity maximum value improves 50%.
Embodiment 2
1) use diameter 3-20nm, length be 200-400nm unmodified celluloses it is nanocrystalline be raw material, prepare quality point
The suspension that number is 0.1%；
2) the accurate unmodified fibers element nanocrystal suspension 30g for weighing mass fraction 0.1%, is added ionized water 10g,
Ammonium polyacrylate 2g, aluminium oxide ceramics powder (content >=99%, D are added into suspension50=1 μm) 50g, antifoaming agent 0.15g, are used
Concentrated ammonia liquor adjusts pH=10, and stirring 12h obtains slurry under conditions of low whipping speed is 500r/min；
3) polyvinyl alcohol 7g is added into slurry as binder, 2g glycerine as plasticizer, low whipping speed is
1h is stirred under conditions of 300r/min, then vacuum degree is de-bubble 15min under conditions of 2Pa, obtains slurry；
4) slurry is cast on casting machine with the speed of 0.5cm/s, obtained wet film dry 10min at 60 DEG C, 100
10min is dried at DEG C, and 15min is dried at 150 DEG C, 6min is dried at 60 DEG C, obtains ceramic body.
Comparative example 2
Accurately weigh 40g deionized waters, remaining repeat embodiment 1 in the 2nd, 3,4 steps, the ceramic green of system.
The ceramic body tensile strength being modified after tested through Cellulose nanocrystal in embodiment 2 is increased to 75.12KPa, compared with
Ceramic body tensile strength improves 44.46% in comparative example 2 under same condition；It is modified through Cellulose nanocrystal in embodiment 2
Ceramic blank drying after three-point bending deflection maximum value be 7.75mm, compared with the ceramic body in comparative example under same condition 2
Three-point bending deflection maximum value improves 40.91%.
Embodiment 3
1) use diameter 3-20nm, length be 200-400nm sulfonated celluloses it is nanocrystalline be raw material, prepare mass fraction
For 0.15% suspension；
2) the accurate sulfonated cellulose nanocrystal suspension 36g for weighing mass fraction 0.15%, adds into suspension
Enter ammonium polyacrylate 2g, aluminium oxide ceramics powder (content >=99%, D50=1 μm) 50g, antifoaming agent 0.1g, pH is adjusted with concentrated ammonia liquor
=10.2, stirring 12h obtains slurry under conditions of low whipping speed is 500r/min；
3) polyvinyl alcohol 7g is added into slurry as binder, 2g glycerine as plasticizer, low whipping speed is
1h is stirred under conditions of 300r/min, then vacuum degree is de-bubble 15min under conditions of 2Pa, obtains slurry；
4) slurry is cast on casting machine with the speed of 0.5cm/s, obtained wet film dry 10min at 60 DEG C, 100
10min is dried at DEG C, and 15min is dried at 150 DEG C, 6min is dried at 60 DEG C, obtains ceramic body.
Comparative example 3
Accurately weigh 36g deionized waters, remaining repeat embodiment 1 in the 2nd, 3,4 steps, the ceramic green of system.
The ceramic body tensile strength being modified after tested through Cellulose nanocrystal in embodiment 3 is increased to 90.32KPa, compared with
Ceramic body tensile strength improves 58.07% in comparative example 3 under same condition；It is modified through Cellulose nanocrystal in embodiment 3
Ceramic blank drying after three-point bending deflection maximum value be 7mm, compared with 3 points of ceramic body in comparative example under same condition 3
Bending deformation quantity maximum value improves 40%.
Embodiment 4
1) use diameter 3-20nm, length be 200-400nm sulfonated celluloses it is nanocrystalline be raw material, prepare mass fraction
For 0.15% suspension；
2) the accurate sulfonated cellulose nanocrystal suspension 30g for weighing mass fraction 0.15%, is added ionized water
Ammonium polyacrylate 2g, aluminium oxide ceramics powder (content >=99%, D are added into suspension by 10g50=1 μm) 50g, antifoaming agent
0.15g adjusts pH=10 with concentrated ammonia liquor, and stirring 12h obtains slurry under conditions of low whipping speed is 500r/min；
3) polyvinyl alcohol 7g is added into slurry as binder, 2g glycerine as plasticizer, low whipping speed is
1h is stirred under conditions of 300r/min, then vacuum degree is de-bubble 15min under conditions of 2Pa, obtains slurry；
4) slurry is cast on casting machine with the speed of 0.5cm/s, obtained wet film dry 10min at 60 DEG C, 100
10min is dried at DEG C, and 15min is dried at 150 DEG C, 6min is dried at 60 DEG C, obtains ceramic body.
Comparative example 4
Accurately weigh 40g deionized waters, remaining repeat embodiment 1 in the 2nd, 3,4 steps, the ceramic green of system.
The ceramic body tensile strength being modified after tested through Cellulose nanocrystal in embodiment 4 is increased to 81.12KPa, compared with
Ceramic body tensile strength improves 56% in comparative example 4 under same condition；The pottery being modified through Cellulose nanocrystal in embodiment 4
Three-point bending deflection maximum value is 7.26mm after porcelain body drying, compared with 3 points of ceramic body in comparative example under same condition 4
Bending deformation quantity maximum value improves 32%.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, there is no the portion being described in detail in some embodiment
Point, it may refer to the associated description of other embodiment.
In the instructions provided here, numerous specific details are set forth.It is to be appreciated, however, that the implementation of the present invention
Example can be put into practice without these specific details.In some instances, well known structure and skill is not been shown in detail
Art, so as not to obscure the understanding of this description.
Heretofore described numberical range includes numerical value all within the scope of this, and includes any two within the scope of this
The value range of numerical value composition.For example, " ceramic powder 40-70% ", this numberical range includes numerical value all between 40-70, and
And include any two numerical value within the scope of this (such as：40,45) value range (40-45) formed；In all embodiments of the invention
The different numerical value of the same index occurred, can in any combination, compositing range value.
Technical characteristic in the claims in the present invention and/or specification can be combined, and a combination thereof mode is not limited to weigh
The combination that profit is obtained in requiring by adduction relationship.It is combined by the technical characteristic in claim and/or specification
The technical solution and protection scope of the present invention arrived.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, according to
According to the technical spirit of the present invention to any simple modification, equivalent change and modification made by above example, this hair is still fallen within
In the range of bright technical solution.
Claims (9)
1. a kind of ceramics curtain coating green body, it is characterised in that：
The component of the slurry of the green body and the mass percentage of each component include,
2. a kind of ceramics curtain coating green body according to claim 1, it is characterised in that：
The Cellulose nanocrystal is the club shaped structure of diameter 3-20nm, length 200-400nm.
3. a kind of ceramics curtain coating green body according to claim 1, it is characterised in that：
The Cellulose nanocrystal includes that unmodified cellulose is nanocrystalline, Tempo celluloses are nanocrystalline, Cationicization
One or more of the nanocrystalline combination of Cellulose nanocrystal, sulfonated cellulose.
4. a kind of ceramics curtain coating green body according to claim 1, it is characterised in that：
The ceramic powder includes oxide ceramic, nitride ceramics powder, carbide ceramics powder, silicide ceramics powder, more
The combination of one or more of first electronic ceramics powder.
5. a kind of ceramics curtain coating green body according to claim 1, it is characterised in that：
The dispersant includes one in acrylic resin, polyacrylate, polyethyleneimine or ammonium polymethacrylate
Kind or two or more combinations；
Alternatively,
The antifoaming agent is organic silicon defoamer.
6. a kind of ceramics curtain coating green body according to claim 1, it is characterised in that：
The binder is styrene-butadiene latex, polyurethane dispersing liquid, aqueous epoxy resin emulsion, polyethyl acrylate lotion or poly- second
The combination of one or more of enol；
Alternatively,
The plasticizer is association type polyurethanes, polyacrylic, carboxymethyl cellulose, hydroxylmethyl cellulose, O-phthalic
The combination of one or more of dibutyl phthalate or glycerine.
7. a kind of preparation method of ceramics curtain coating green body, it is characterised in that：Including,
Cellulose nanocrystal is mixed with water, obtains Cellulose nanocrystal suspension；
Ceramic powder, dispersant, antifoaming agent are added in the Cellulose nanocrystal suspension, adjust pH to 9-11, into
Row first stirs, and obtains ceramic powder-sintering aid-Cellulose nanocrystal suspension；
Binder, plasticizer are added into the ceramic powder-sintering aid-Cellulose nanocrystal suspension, carries out second
Stirring, after the completion of the second stirring, de-bubble 5-30min under conditions of vacuum degree is 0.1Pa-5Pa obtains slurry；
The slurry is subjected to curtain coating processing, drying, obtains the ceramics curtain coating green body.
8. a kind of preparation method of ceramics curtain coating green body according to claim 7, it is characterised in that：
The mixing speed of first stirring is 400-600r/min, mixing time 10-12h；
Alternatively,
The mixing speed of second stirring is 300-450r/min, mixing time 1-3h.
9. a kind of preparation method of ceramics curtain coating green body according to claim 7, it is characterised in that：
The process of the drying, which is followed successively by 30-60 DEG C, dries 0.1-0.5h, dry 0.1-0.5h, 100-180 at 60-100 DEG C
Dry 0.2-1h, 30-70 DEG C of dry 0.1-0.5h at DEG C.
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| CN110330350A (en) * | 2019-07-25 | 2019-10-15 | 武汉理工大学 | A kind of preparation method of fiber reinforced alumina ceramics |
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| CN110330350A (en) * | 2019-07-25 | 2019-10-15 | 武汉理工大学 | A kind of preparation method of fiber reinforced alumina ceramics |
| CN113277882A (en) * | 2021-06-30 | 2021-08-20 | 江西省萍乡市湘东石油化工填料厂 | Modified chrome corundum slurry for surface of honeycomb ceramic heat accumulator and pulping method thereof |
| CN113277882B (en) * | 2021-06-30 | 2022-07-19 | 江西省萍乡市湘东石油化工填料厂 | Modified chrome corundum slurry for surface of honeycomb ceramic heat accumulator and pulping method and application thereof |
| WO2023273504A1 (en) * | 2021-06-30 | 2023-01-05 | Oppo广东移动通信有限公司 | Housing and preparation method therefor, and electronic device |
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