CN108997003A - Ceramic slurry, ceramic component and preparation method thereof - Google Patents
Ceramic slurry, ceramic component and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of ceramic slurries, ceramic component and preparation method thereof, the ceramic slurry, including material of main part, gelling agent and dispersing agent, material of main part includes thin fused quartz powder and two kinds of thick fused quartz powder, the median of thin fused quartz powder is 3 μm~15 μm, the median of thick fused quartz powder is 0.2mm~3mm, the 1%~5% of quality of materials based on the quality of gelling agent, the 0.1%~0.5% of quality of materials based on the quality of dispersing agent.Above-mentioned ceramic slurry not only can guarantee made of ceramic component mechanical strength, and can also reduce subsequent drying and sintering when shrinkage, and then effectively prevent subsequent drying and sintering when ceramic component cracking, effectively improve product yield.The ceramic slurry is applicable to N,N-DMAA, N, and the gelling agent of the hypotoxicities such as N- methylene-bisacrylamide, hydroxymethyl acrylamide and amylopectin is environmentally protective, is suitble to industrialization large-scale promotion.
Description
Technical field
The present invention relates to technical field of inorganic nonmetallic materials, more particularly to a kind of ceramic slurry, ceramic component and its
Preparation method.
Background technique
With the aggravation of fossil energy crisis, the energy industry of new sustainable development receives the concern in the whole world and acquisition
Fast development.Solar energy is as a kind of cleaning and the inexhaustible energy has obtained very big concern, and solar energy industry is in recent years
Development is swift and violent, and the solar energy industry in China also obtains fast development in recent years, increases solar power station installation current year newly
Capacity and solar cell module yield occupy first place in the world.Core material one of of the crystal silicon as solar battery, with too
Its production capacity of the development of positive energy industry is also constantly promoted.Fused quartz ceramic crucible is rushed because of its extremely low linear expansion coefficient, high heat resistance
The advantageous properties such as hitting property, acid-alkali-corrosive-resisting, dielectric constant be low become key consumption irreplaceable when polycrystalline silicon ingot casting production
Material.
Industrial circle prepares fused quartz ceramic crucible and mainly uses slip casting method and gel injection molding and forming technology at present.Slip casting
Method is limited by its technological principle, and there are molding cycle length, preform structure uniformity difference and intensity are low, it is small etc. scarce to be applicable in mold range
Point, leads to that the production cycle is long, yields is low, and manufacturing cost is higher.Gel injection molding and forming technology has simple process, investment cost
It is few, the good characteristics such as blank structure densification molded.However only a small number of enterprises domestic at present grasp fused quartz ceramic earthenwares
The gel injection molding and forming technology technology of crucible, it is usually propylene that the main problems faced of gel injection molding and forming technology technology, which is gelling agent,
This gel monomers with neurotoxicity of amide, Long Term Contact are unfavorable to human health and environmental protection, and use less toxic gelling agent
The biscuit of ceramics body of preparation is again easy to crack, reduces product yield.
Summary of the invention
Based on this, it is necessary to provide a kind of ceramic slurry that can be improved yield and can be suitably used for low toxicity or non-toxic gel agent
Material, ceramic component and preparation method thereof.
A kind of ceramic slurry, including material of main part, gelling agent and dispersing agent, the material of main part include thin fused quartz powder
With two kinds of thick fused quartz powder, the median of the thin fused quartz powder is 3 μm~15 μm, in the thick fused quartz powder
Position partial size is 0.2mm~3mm, and the quality of the gelling agent is the 1%~5% of the material of main part quality, the dispersing agent
Quality is the 0.1%~0.5% of the material of main part quality.
Above-mentioned ceramic slurry uses two kinds of fused quartz powders differing greatly of partial size, and control its partial size above range simultaneously
In conjunction with each group distribution ratio, two kinds of vitreous silica pulvis of the ceramic slurry interact and each component acts synergistically, and can not only protect
The mechanical strength of ceramic green made of demonstrate,proving, and shrinkage when subsequent drying and sintering can be also reduced, and then after effectivelying prevent
The cracking of ceramic component, effectively improves product yield when continuous dry and sintering.
The ceramic slurry is applicable to N, N- dimethacrylamide, N,N methylene bis acrylamide, methylol propylene
The gelling agent of the hypotoxicities such as amide and amylopectin, the high mechanical strength of manufactured ceramic green, cracking are few, therefore can effectively keep away
Exempt to be detrimental to health using acrylamide as gelling agent and the problem of environmental protection, therefore the ceramic slurry is environmentally protective, suitable
Industrialize large-scale promotion.
The mass ratio of the thin fused quartz powder and the thick fused quartz powder is (0.33 in one of the embodiments,
~2): 1.
The gelling agent is N,N-DMAA, N, N- methylene bisacrylamide acyl in one of the embodiments,
At least one of amine, hydroxymethyl acrylamide and amylopectin；
And when the gelling agent contains N, N- dimethacrylamide, N,N methylene bis acrylamide and methylol propylene
When at least one of amide, the ceramic slurry further includes initiator, and the quality of the initiator is the gelling agent quality
0.2%~3%.
The gelling agent is N,N-DMAA and N, N- methylene bisacrylamide acyl in one of the embodiments,
The mixture of amine or the gelling agent are hydroxymethyl acrylamide and N, the mixture of N- methylene-bisacrylamide.
The initiator is azodiisobutyronitrile, ammonium persulfate, potassium peroxydisulfate and persulfuric acid in one of the embodiments,
At least one of sodium.
The preparation method of above-mentioned ceramic slurry, comprising the following steps:
The following raw material is provided, the raw material includes material of main part, gelling agent, dispersing agent and water, and the material of main part includes
Thin fused quartz powder and two kinds of thick fused quartz powder, the median of the thin fused quartz powder is 3 μm~15 μm, described thick molten
The median of fused silica powder is 0.2mm~3mm, and the quality of the gelling agent is the 1%~5% of the material of main part quality,
The quality of the dispersing agent is the 0.1%~0.5% of the material of main part quality；
By the thin fused quartz powder, the dispersing agent, the gelling agent and water mixing and ball milling, the thick melting is added
Silica flour continues ball milling, obtains the ceramic slurry；
When the raw material further includes initiator, the thick fused quartz powder continuation ball milling completion is being added in the initiator
After be added.
The thin fused quartz powder, the dispersing agent, the gelling agent and water mixing and ball milling in one of the embodiments,
Revolving speed be 160rpm-250rpm, the time be 2h~6h；It is described the thick fused quartz powder be added continue the revolving speed of ball milling be
60rpm-120rpm, time are 10min~30min.
A kind of ceramic component is mainly prepared by above-mentioned ceramic slurry.
The ceramic component is fused quartz ceramic crucible in one of the embodiments,.
A kind of preparation method of ceramic component, comprising the following steps:
By above-mentioned ceramic slurry deaeration, mold internal heating curing is injected, ceramic body is obtained；
The ceramic body through demoulding, drying and is sintered, ceramic component is obtained.
Detailed description of the invention
Fig. 1 is the electron scanning micrograph of ceramic body made from embodiment 2；
Fig. 2 is the electron scanning micrograph on fused quartz ceramic crucible surface made from embodiment 2；
Fig. 3 is the optical photograph of fused quartz ceramic crucible made from embodiment 2；
Fig. 4 is the electron scanning micrograph for the fused quartz ceramic that comparative example 1 obtains.
Specific embodiment
To facilitate the understanding of the present invention, below will to invention is more fully described, and give it is of the invention compared with
Good embodiment.But the invention can be realized in many different forms, however it is not limited to embodiment described herein.Phase
Instead, purpose of providing these embodiments is makes the disclosure of the present invention more thorough and comprehensive.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein "and/or" includes one or more phases
Any and all combinations of the listed item of pass.
The embodiment of the invention provides a kind of ceramic slurries and preparation method thereof.
The ceramic slurry includes material of main part, gelling agent and dispersing agent etc..
Material of main part includes thin fused quartz powder and two kinds of thick fused quartz powder, and the median of thin fused quartz powder is 3 μ
M~15 μm, the median of thick fused quartz powder are 0.2mm~3mm.Thin fused quartz powder and the preferred purity of thick fused quartz powder
For 99%-99.99% (mass percentage).
The 1%~5% of quality of materials based on the quality of gelling agent.
The 0.1%~0.5% of quality of materials based on the quality of dispersing agent.
Above-mentioned ceramic slurry uses two kinds of fused quartz powders differing greatly of partial size, and control its partial size above range simultaneously
In conjunction with each group distribution ratio, two kinds of vitreous silica pulvis of the ceramic slurry interact and each component acts synergistically, and can not only protect
The mechanical strength of ceramic green made of demonstrate,proving, and shrinkage when subsequent drying and sintering can be also reduced, and then after effectivelying prevent
The cracking of ceramic component, effectively improves product yield when continuous dry and sintering.
The ceramic slurry is applicable to N, N- dimethacrylamide, N,N methylene bis acrylamide, methylol propylene
The hypotoxicities such as amide and amylopectin or avirulent gelling agent, the high mechanical strength of manufactured ceramic component, cracking are few, therefore
It can effectively avoid and be detrimental to health using acrylamide as gelling agent and environmentally friendly problem, therefore the ceramic slurry green ring
It protects, is suitble to industrialization large-scale promotion.
So preferably, gelling agent can be N,N-DMAA, N, N- methylene-bisacrylamide, methylol third
At least one of acrylamide and amylopectin.
Amylopectin itself has dendriform branched structure, and water suction gelatinization occurs at relatively high temperatures can be by fused quartz powder
Bonding is got up, so that ceramic body mechanical strength with higher.
When gelling agent contains N, in N- dimethacrylamide, N,N methylene bis acrylamide and hydroxymethyl acrylamide
At least one when, ceramic slurry further includes initiator, and the quality of initiator is the 0.2%~3% of gelling agent quality.It is so solidifying
Jelly polymerize under the action of initiator forms two-dimensional structure or three-dimensional net structure to solidify ceramic slurry in situ, and makes
Green body mechanical strength with higher.
It is further preferred that gelling agent is N,N-DMAA and N, the mixing of N- methylene-bisacrylamide
Object or gelling agent are hydroxymethyl acrylamide and N, the mixture of N- methylene-bisacrylamide.Such N, N- dimethyl allene
Amide or hydroxymethyl acrylamide, with N, N- methylene-bisacrylamide polymerize under the action of initiator forms three-dimensional network knot
Structure, so that ceramic green mechanical strength with higher.
When gelling agent is N,N-DMAA and N, when the mixture of N- methylene-bisacrylamide, N, N- diformazan
Base acrylamide and N, the mass ratio of N- methylene-bisacrylamide are 20:1~5:1, preferably 10:1, herein preferred ratio
Lower gelling agent can obtain more sufficient network-like structure when polymerizeing under initiator effect, have to ceramic green mechanical strength
Benefit.When gelling agent is hydroxymethyl acrylamide and N, when the mixture of N- methylene-bisacrylamide, hydroxymethyl acrylamide and
The mass ratio of N, N- methylene-bisacrylamide is 20:1~5:1, preferably 10:1.
Initiator can be at least one of azodiisobutyronitrile, ammonium persulfate, potassium peroxydisulfate and sodium peroxydisulfate.In a tool
In body example, initiator is preferably ammonium persulfate.
Dispersing agent can be acrylic acid -2- acrylamide-2-methyl propane sulfonic copolymer, polyvinylpyrrolidone and naphthalene sulfonic acids
At least one of formaldehyde condensation products.In a specific example, dispersing agent is preferably acrylic acid -2- acrylamide -2- methyl-prop
Sulfonic acid copolymer.
Through further research, it has been found that the mass ratio for controlling thin fused quartz powder and thick fused quartz powder is (0.33~2):
1, it can further improve the effect of the cracking of ceramic component when preventing subsequent drying and sintering.
It is understood that the raw material of the ceramic slurry further includes water.Further, the mass ratio of water and material of main part be 1:(4~
10), the high mechanical strength of ceramic green obtained, cracking rate are low in the range.
The preparation method of above-mentioned ceramic slurry, comprising the following steps:
Above-mentioned each raw material of ceramic slurry is provided；
By thin fused quartz powder, dispersing agent, gelling agent and water mixing and ball milling, adds thick fused quartz powder and continues ball milling,
Obtain ceramic slurry.
When the raw material of ceramic slurry further includes initiator, initiator is after the completion of being added thick fused quartz powder continuation ball milling
It is added.Initiator adds after other components are sufficiently mixed, and avoids initiator that the uniformity for influencing component mixing too early is added.
So first thin fused quartz powder, dispersing agent, gelling agent and water etc. are added in ball mill and grind a period of time；Then
Thick fused quartz powder is added in above-mentioned slurry to continue to grind and obtains ceramic slurry for a period of time.It can so advantageously form uniformly
The good and not easy to crack ceramic component green body of property.
It specifically, is 160rpm-250rpm by the revolving speed of thin fused quartz powder, dispersing agent, gelling agent and water mixing and ball milling,
It is preferred that 220rpm, the time is 2h~6h.It is 60rpm-120rpm that thick fused quartz powder, which is added, to continue the revolving speed of ball milling, preferably
80rpm, time are 10min~30min.
Correspondingly, the embodiment of the invention also provides a kind of ceramic components and preparation method thereof.
The ceramic component is mainly prepared by above-mentioned ceramic slurry.In a specific example, above-mentioned ceramic component is molten
Fused silica ceramic crucible can be used for the ingot casting production of polysilicon.
The preparation method of above-mentioned ceramic component, comprising the following steps:
By above-mentioned ceramic slurry deaeration, mold internal heating curing is injected, ceramic body is obtained；Ceramic body is demoulded,
It dries and is sintered, obtain ceramic component.
Wherein, it is heating and curing and is solidified using heating water bath, the temperature of water-bath is 65 DEG C~90 DEG C, and the time of water-bath is 0.5h
~1.5h.
Wherein, the condition of sintering is that 1h~6h is kept the temperature at 1100 DEG C~1300 DEG C.
When needing that fused quartz ceramic crucible is made, using the corresponding mold of crucible, such as it is rectangular or cylindrical
Deng.
The preparation method of above-mentioned ceramic component uses Gelcasting Technique, simple process and low cost, pottery obtained
The high mechanical strength of porcelain billet body, cracking are few, effectively improve product yield, and the preparation method is applicable to low toxicity, green
The gelling agent of environment-friendly type, it is environmentally protective, it is suitble to industrialization large-scale promotion.
The following are specific embodiments.
Embodiment 1:
By the water of 1 part of quality, the thin fused quartz powder of 2.6 parts of quality and dispersing agent, gelling agent etc. are added in ball mill
It is that initial melt quartz slurry is made in ball milling 4h under 160rpm in revolving speed, the thick of 1.4 parts of quality is then added into above-mentioned slurry
Fused quartz powder is to continue ball milling 15min under 120rpm in revolving speed, is added into the slurry after ball milling and accounts for gelling agent quality 2%
Ammonium persulfate (prewired is the aqueous solution of 10% mass concentration), obtains required ceramic slurry.Then ceramic slurry is carried out true
Empty deaeration injects in crucible die after deaeration, mold is placed in 1h in 70 DEG C of water bath, and after melted after demoulding
Silica crucible green body, green body are fired to obtain fused quartz ceramic earthenware in kiln after temperature and humidity control is dry through 1150 DEG C of heat preservation 5h
Crucible.The median of thin fused quartz powder used is 4 μm in the embodiment, and the median of thick fused quartz powder used is
0.3mm；Dispersing agent used is acrylic acid-diacrylamine-dimethyl propylene sulfonic acid copolymer, and dosage is the total matter of fused quartz powder
The 0.5% of amount；Gelling agent used is N,N-DMAA and N, and N- methylene bisacrylamide acyl, the mass ratio of the two is
10:1, total dosage of gelling agent are the 2% of fused quartz powder gross mass.
Embodiment 2:
By the water of 1 part of quality, the thin fused quartz powder of 3.3 parts of quality and dispersing agent, gelling agent etc. are added in ball mill
It is that initial melt quartz slurry is made in ball milling 5h under 220rpm in revolving speed, the thick of 3.3 parts of quality is then added into above-mentioned slurry
Fused quartz powder is to continue ball milling 25min under 80rpm in revolving speed, is added into the slurry after ball milling and accounts for gelling agent quality 2%
Required ceramic slurry is obtained after ammonium persulfate (prewired is the aqueous solution of 10% mass concentration).Then vacuum is carried out to ceramic slurry
Deaeration injects in crucible die after deaeration, mold is placed in 1h in 75 DEG C of water bath, and after tekite is obtained after demoulding
English crucible green body, green body are fired to obtain fused quartz ceramic earthenware in kiln after temperature and humidity control is dry through 1200 DEG C of heat preservation 3h
Crucible.The median of thin fused quartz powder used is 8 μm in the embodiment, and the median of thick fused quartz powder used is 1mm；
Dispersing agent used is acrylic acid-diacrylamine-dimethyl propylene sulfonic acid copolymer, and dosage is fused quartz powder gross mass
0.3%；Gelling agent used is N,N-DMAA and N, and N- methylene bisacrylamide acyl, the mass ratio of the two is 10:1,
Total dosage of gelling agent is the 1.5% of the gross mass of fused quartz powder.
Embodiment 3:
By the water of 1 part of quality, the thin fused quartz powder of 2.8 parts of quality and dispersing agent, gelling agent etc. are added in ball mill
It is that initial melt quartz slurry is made in ball milling 3h under 220rpm in revolving speed, the thick molten of 6 parts of quality is then added into above-mentioned slurry
Fused silica powder is to continue ball milling 30min under 80rpm in revolving speed, and the mistake for accounting for gelling agent quality 2% is added into the slurry after ball milling
Required ceramic slurry is obtained after ammonium sulfate (prewired is the aqueous solution of 10% mass concentration).Then it is de- vacuum to be carried out to ceramic slurry
Bubble injects in crucible die after deaeration, mold is placed in 1h in 80 DEG C of water bath, and after vitreous silica is obtained after demoulding
Crucible green body, green body are fired to obtain fused quartz ceramic crucible in kiln after temperature and humidity control is dry through 1220 DEG C of heat preservation 2h.
The median of thin fused quartz powder used is 12 μm in the embodiment, and the median of thick fused quartz powder used is 1.8mm；
Dispersing agent used is acrylic acid-diacrylamine-dimethyl propylene sulfonic acid copolymer, and dosage is fused quartz powder gross mass
0.2%；Gelling agent used is N,N-DMAA and N, and N- methylene bisacrylamide acyl, the mass ratio of the two is 10:1,
Total dosage of gelling agent is the 1.5% of the gross mass of fused quartz powder.
Embodiment 4:
By the water of 1 part of quality, the thin fused quartz powder of 2.5 parts of quality and dispersing agent, gelling agent etc. are added in ball mill
It is that initial melt quartz slurry is made in ball milling 2h under 250rpm in revolving speed, the thick of 7.5 parts of quality is then added into above-mentioned slurry
Fused quartz powder is to continue ball milling 30min under 80rpm in revolving speed, is added into the slurry after ball milling and accounts for gelling agent quality 2%
Ceramic slurry needed for being obtained after ammonium persulfate (prewired is the aqueous solution of 10% mass concentration).Then it is de- vacuum to be carried out to ceramic slurry
Bubble injects in crucible die after deaeration, mold is placed in 1h in 85 DEG C of water bath, and after vitreous silica is obtained after demoulding
Crucible green body, green body are fired to obtain fused quartz ceramic crucible in kiln after temperature and humidity control is dry through 1250 DEG C of heat preservation 1h.
The median of thin fused quartz powder used is 15 μm in the embodiment, and the median of thick fused quartz powder used is 2.5mm；
Dispersing agent used is acrylic acid-diacrylamine-dimethyl propylene sulfonic acid copolymer, and dosage is fused quartz powder gross mass
0.1%；Gelling agent used is hydroxymethyl acrylamide and N, and N- methylene bisacrylamide acyl, the mass ratio of the two is 10:1, gel
Total dosage of agent is the 1.8% of the gross mass of fused quartz powder.
Embodiment 5:
By the water of 1 part of quality, the thin fused quartz powder of 3 parts of quality and dispersing agent, gelling agent etc. be added in ball mill in
Revolving speed is that initial melt quartz slurry is made in ball milling 4h under 250rpm, and the thick molten of 3.6 parts of quality is then added into above-mentioned slurry
Fused silica powder is to continue ball milling 25min under 60rpm to get required ceramic slurry in revolving speed.Then de- to ceramic slurry vacuum
Injected in crucible die after bubble, mold be placed in 1h in 80 DEG C of water bath, and after fused silica crucible is obtained after demoulding
Green body, green body are fired to obtain fused quartz ceramic crucible in kiln after temperature and humidity control is dry through 1200 DEG C of heat preservation 3h.The reality
The median for applying thin fused quartz powder used in example is 8 μm, and the median of thick fused quartz powder used is 1.5mm；It is used
Dispersing agent is acrylic acid-diacrylamine-dimethyl propylene sulfonic acid copolymer, and dosage is the 0.3% of fused quartz powder gross mass；
Gelling agent used is amylopectin, and total dosage of gelling agent is the 3% of the gross mass of fused quartz powder.
Embodiment 6:
By the water of 1 part of quality, the thin fused quartz powder of 2.8 parts of quality and dispersing agent, gelling agent etc. are added in ball mill
It is that vitreous silica slurry is made in ball milling 3h under 220rpm in revolving speed, the thick tekite of 6 parts of quality is then added into above-mentioned slurry
English powder is to continue ball milling 30min under 80rpm to get required ceramic slurry in revolving speed.Then to ceramic slurry vacuum defoamation after
Inject in crucible die, mold be placed in 1h in 75 DEG C of water bath, and after fused silica crucible green body is obtained after demoulding,
Green body is fired to obtain fused quartz ceramic crucible in kiln after temperature and humidity control is dry through 1220 DEG C of heat preservation 2h.In the embodiment
The median of thin fused quartz powder used is 12 μm, and the median of thick fused quartz powder used is 1.8mm；Dispersing agent used
For acrylic acid-diacrylamine-dimethyl propylene sulfonic acid copolymer, dosage is the 0.2% of fused quartz powder gross mass；It is used solidifying
Jelly is amylopectin, and total dosage of gelling agent is the 4.5% of the gross mass of fused quartz powder.
Comparative example 1
Comparative example 1 is substantially the same manner as Example 2, and difference is, thick fused quartz powder is substituted for the median of equivalent
For 8 μm of thin fused quartz powder.
Comparative example 2
Comparative example 2 is substantially the same manner as Example 2, and difference is, the thick fused quartz powder that median is 1mm is substituted for
The median of equivalent is the fused quartz powder of 5mm.
Comparative example 3
Comparative example 3 is substantially the same manner as Example 2, and difference is, the thick fused quartz powder that median is 1mm is substituted for
The median of equivalent is the fused quartz powder of 0.05mm.
By fused quartz ceramic crucible made from fused quartz ceramic crucible made from Examples 1 to 6 and comparative example 1~3
Yield statistics is carried out according to cracking situation.It is as shown in table 1 below to obtain product yield.
Table 1
| Group | Product yield |
| Embodiment 1 | 45% |
| Embodiment 2 | 82% |
| Embodiment 3 | 80% |
| Embodiment 4 | 75% |
| Embodiment 5 | 60% |
| Embodiment 6 | 78% |
| Comparative example 1 | 5% |
| Comparative example 2 | 35% |
| Comparative example 3 | 20% |
By the fracture for the ceramic body not being sintered made from embodiment 2 and sintered fused quartz ceramic crucible table
Face is scanned Electronic Speculum test respectively, as depicted in figs. 1 and 2 respectively.It can be seen that from Fig. 1 and Fig. 2, the ceramics not being sintered
The fracture of green body and sintered fused quartz ceramic crucible surface are visibly homogeneous, do not occur cracking situation.Embodiment 2 is made
Fused quartz ceramic crucible actual product, as shown in figure 3, including rectangular or cylindrical, it is known that vitreous silica obtained pottery
Porcelain crucible, color is uniform, and surface is smooth, without any cracking situation.Fig. 4 is fused quartz ceramic obtained in comparative example 1
As can be seen from Figure 4 there is apparent cracking phenomena in scanning electron microscope (SEM) photograph in ceramic component.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of ceramic slurry, which is characterized in that including material of main part, gelling agent and dispersing agent, the material of main part includes thin
Fused quartz powder and two kinds of thick fused quartz powder, the median of the thin fused quartz powder are 3 μm~15 μm, the thick melting
The median of silica flour is 0.2mm~3mm, and the quality of the gelling agent is the 1%~5% of the material of main part quality, institute
The quality for stating dispersing agent is the 0.1%~0.5% of the material of main part quality.
2. ceramic slurry as described in claim 1, which is characterized in that the thin fused quartz powder and the thick fused quartz powder
Mass ratio be (0.33~2): 1.
3. ceramic slurry as described in claim 1, which is characterized in that the gelling agent be N,N-DMAA, N,
At least one of N- methylene-bisacrylamide, hydroxymethyl acrylamide and amylopectin；
And when the gelling agent contains N, N- dimethacrylamide, N,N methylene bis acrylamide and hydroxymethyl acrylamide
At least one of when, the ceramic slurry further includes initiator, and the quality of the initiator is the gelling agent quality
0.2%~3%.
4. ceramic slurry as claimed in claim 3, which is characterized in that the gelling agent be N,N-DMAA and N,
The mixture of N- methylene-bisacrylamide or the gelling agent are hydroxymethyl acrylamide and N, N- methylene-bisacrylamide
Mixture.
5. ceramic slurry as described in claim 3 or 4, which is characterized in that the initiator is azodiisobutyronitrile, persulfuric acid
At least one of ammonium, potassium peroxydisulfate and sodium peroxydisulfate.
6. a kind of preparation method of ceramic slurry, which comprises the following steps:
The following raw material is provided, the raw material includes material of main part, gelling agent, dispersing agent and water, and the material of main part includes thin molten
Fused silica powder and two kinds of thick fused quartz powder, the median of the thin fused quartz powder are 3 μm~15 μm, the thick tekite
The median of English powder is 0.2mm~3mm, and the quality of the gelling agent is the 1%~5% of the material of main part quality, described
The quality of dispersing agent is the 0.1%~0.5% of the material of main part quality；
By the thin fused quartz powder, the dispersing agent, the gelling agent and water mixing and ball milling, the thick vitreous silica is added
Powder continues ball milling, obtains the ceramic slurry；
When the raw material further includes initiator, the initiator adds after the completion of the thick fused quartz powder is added and continues ball milling
Enter.
7. the preparation method of ceramic slurry as claimed in claim 6, which is characterized in that the thin fused quartz powder, described point
The revolving speed of powder, the gelling agent and water mixing and ball milling is 160rpm-250rpm, and the time is 2h~6h；The addition is described thick
The revolving speed that fused quartz powder continues ball milling is 60rpm-120rpm, and the time is 10min~30min.
8. a kind of ceramic component, which is characterized in that be mainly prepared by the described in any item ceramic slurries of Claims 1 to 5.
9. ceramic component as claimed in claim 8, which is characterized in that the ceramic component is fused quartz ceramic crucible.
10. a kind of preparation method of ceramic component, which comprises the following steps:
By the described in any item ceramic slurry deaerations of Claims 1 to 5, mold internal heating curing is injected, ceramic body is obtained；
The ceramic body through demoulding, drying and is sintered, ceramic component is obtained.
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