CN109748582A - A kind of black zirconia ceramics and preparation method thereof - Google Patents
A kind of black zirconia ceramics and preparation method thereof Download PDFInfo
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Abstract
The present invention discloses a kind of black zirconia ceramics material compositions, ingredient comprising following mass percentage: iron oxide 0-5%, cobalt oxide 0-5%, chromium oxide 0-5%, aluminium oxide 0-5%, nickel oxide 0-5%, manganese oxide 0-5%, zinc oxide 0-5%, yttrium oxide 2-6%, titanium oxide 0-5%, silica 0-5%, cerium oxide 0-5%, surplus are the zirconium oxide containing hafnium oxide.Black zirconia ceramics material compositions of the present invention, powder granularity is small, is uniformly dispersed, and containing its black zirconia ceramics covering power with higher and blackness, has lower light transmittance.Meanwhile the invention also discloses the preparation methods of the black zirconia ceramics and the black zirconia ceramics that are prepared using the black zirconia ceramics material compositions.
Description
Technical field
The present invention relates to a kind of ceramic material and preparation method thereof, especially a kind of zirconia ceramics material and its preparation side
Method.
Background technique
Zirconium dioxide is due to excellent mechanics, calorifics, electric property, in structural material, optical element, oxygen sensitive element
It has a wide range of applications with fuel cell etc..In recent years, as people are to the high speed development of ornament demand, black oxidation
Zircon ceramic becomes high-grade decoration with its excellent mechanical performance, chromatic colour, metallic luster and the features such as without allergy effect
New lover's material has vast market prospect in high-grade watch chain, bangle, phone housing etc..
The preparation of black zirconia ceramics at present mainly uses following two method: 1, carrying out zirconia ceramics true
Black in empty, reducing atmosphere or inert atmosphere, form Lacking oxygen, to form the point defect of colour center, generates the absorption to light and imitate
It answers；2, the colorants oxide such as doping iron, cobalt, nickel in zirconium oxide improves the absorption to light by addition colorant, to improve oxygen
Change the covering power and blackness of zirconia material.Using vacuum drying oven, reducing atmosphere furnace or inert atmosphere furnace, need zirconium oxide in air
It sinters porcelain into, then blacks in above-mentioned sintering furnace, the cost that production technology has been significantly greatly increased is done so, to special shape and thickness
Different product is easy to cause a systems such as product blackness deficiency because colour center inhomogeneities leads to color difference occur during nigrescence
Column problem.And the colorants oxide such as doping iron, cobalt, nickel in zirconium oxide, since absorbing wavelength of each oxide to light is inconsistent,
It is easy to cause black not black, situations such as partially red, partially blue, partially green occurs in product colour.And institute's oxygenates are easy to rise with yttrium, zirconium
Reaction, destroys the stability of zirconium oxide, be easy to cause product Transformation Cracking.In preparation process to colorant additive amount and temperature
It is required that more stringent, once control is bad to be easy for occurring the problems such as color between batch is different.
It can be seen from the above, that there are Color uniformities is poor for existing black zirconia ceramics, blackness is insufficient, and translucency is good, color
The bad disadvantage such as hiding lack.It is unable to satisfy the requirement of the appearances elements such as high blackness mobile phone board.
Summary of the invention
A kind of covering power with higher is provided it is an object of the invention to overcome above-mentioned the deficiencies in the prior art place
With blackness, the lower black zirconia ceramics material compositions of light transmittance and black zirconia ceramics containing the composition.
Meanwhile the present invention also provides the preparation methods of the black zirconia ceramics.
To achieve the above object, the technical scheme adopted by the invention is as follows: a kind of black zirconia ceramics material compositions, packet
Ingredient containing following mass percentage: iron oxide 0-5%, cobalt oxide 0-5%, chromium oxide 0-5%, aluminium oxide 0-5%, oxidation
Nickel 0-5%, manganese oxide 0-5%, zinc oxide 0-5%, yttrium oxide 2-6%, titanium oxide 0-5%, silica 0-5%, cerium oxide
0-5%, surplus are the zirconium oxide containing hafnium oxide.
In black zirconia ceramics material compositions of the invention, be added to the colorant of black, can significantly improve by
The covering power and black of its black zirconia ceramics being prepared reduce light transmittance.
It is described containing hafnium oxide as the preferred embodiment of black zirconia ceramics material compositions of the present invention
In zirconium oxide, the mass percentage of the hafnium oxide is less than 50%.
As the preferred embodiment of black zirconia ceramics material compositions of the present invention, the black zirconia pottery
Ceramic material composition includes the ingredient of following mass percentage: iron oxide 2-4%, cobalt oxide 1.5-3.5%, chromium oxide 1.5-
3.5%, aluminium oxide 2-4%, nickel oxide 2-4%, manganese oxide 1.5-3.5%, zinc oxide 1.5-3.5%, yttrium oxide 2-4%, oxygen
Change titanium 1.5-3.5%, silica 1 .5-3.5%, cerium oxide 1.5-3.5%, surplus is the zirconium oxide containing hafnium oxide.
As the preferred embodiment of black zirconia ceramics material compositions of the present invention, the black zirconia pottery
Ceramic material composition is powder, and powder D50 granularity is 0.1-3um, specific surface area 5-25m2/g.
In addition, another object of the present invention is to provide a kind of black with high blackness, high light-proofness and low light transmission
Zirconia ceramics, in order to achieve this, the technical scheme adopted by the invention is as follows: a kind of black zirconia ceramics, the black oxygen
Changing zircon ceramic includes black zirconia ceramics material compositions as described above.
Black zirconia ceramics of the invention contain black zirconia ceramics material compositions as described above, have higher
Covering power and blackness, be provided simultaneously with lower light transmittance.Black zirconia ceramics of the invention are by black oxidation described above
After zircon ceramic material compositions are prepared, formed by atoms such as iron, cobalt, chromium, aluminium, nickel, manganese, zinc to the oxygen containing hafnium oxide
The surface cladding for changing zirconium crystal grain forms one layer of oxide skin(coating) on the zirconia grains surface containing hafnium oxide, passes through different colorants
Absorption to visible wavelength, to reduce light in the reflection on zirconia ceramics surface, and can have in the case where being less than 1mm thickness
High blackness and good covering power.And due to being doped using surface coating technology, yttria-zirconia is neither influenced
Stablize system solid solution, while zirconia grains being inhibited to grow up, the anti-aging property and thermostabilization of zirconia ceramics can be effectively improved
Property.
As the preferred embodiment of black zirconia ceramics of the present invention, the black zirconia ceramics are that polishing is thick
Spend 0.1-1.0mm, 550nm wavelength under light transmittance < 0.5, OD value > 3.0, chromatic value L≤45 potsherd.
Finally, a further object of the present invention is to provide a kind of simple processes, the black oxidation described above being easy to implement
The preparation method of zircon ceramic, in order to achieve this, the technical scheme adopted by the invention is as follows: a kind of black zirconia pottery as described above
The preparation method of porcelain, comprising the following steps:
(1) by each material mixing contained by black zirconia ceramics material compositions, black zirconia ceramics combination of materials is obtained
Object；
(2) the black zirconia ceramics material compositions that step (1) obtains are formed, roasting obtains black zirconia pottery
Porcelain；
Tape casting, dry-pressing formed, injection moulding, hot-forming or gel casting are shaped in the step (2).
The Zirconium powder granularity of the preparation method of black zirconia ceramics of the present invention, preparation is small, is uniformly dispersed, mixes
Miscellaneous oxide is evenly coated at Zirconium powder surface, can effectively improve powder active, and processability is excellent, is able to satisfy dry
The defects of different ceramics such as pressure, curtain coating, injection use the demand of technique, and the ceramic section being sintered is fine and close, pore-free, crackle.
And the technique preparation is simply, and it is easy to operate, do not increase production process and workload, it can be achieved that volume production, has preferable stablize
Property, it can be realized homogenizing for product.
The black zirconia ceramics being prepared using the method for the invention, at porcelain density >=5.8g/cm3,3 points anti-
Roll over intensity >=1200Mpa, Vickers hardness >=1200.
The preferred embodiment of preparation method as black zirconia ceramics of the present invention, in the step (2)
It is shaped to tape casting, dry-pressing formed or injection moulding；
The tape casting the following steps are included:
(1a) ball milling: the black zirconia ceramics material compositions are mixed in the ball mill with dispersing agent and binder
It is even；
(2a) tape casting: the slurry after ball milling is uniformly dispersed carries out tape casting in casting machine, adjusts casting technique ginseng
The curtain coating green body with a thickness of 0.2-1.1mm is made in number；
(3a) punch forming: curtain coating green body obtained being put in designed mold and carries out punch forming, and blank is made；
The sintering of (4a) dumping: carrying out dumping sintering for punching press green body, and wherein the dumping time is 60-100h, sintering time 40-
60h is to get the black zirconia ceramics；
It is described dry-pressing formed the following steps are included:
(1b) ball milling is granulated: the black zirconia ceramics material compositions are mixed in the ball mill with dispersing agent, binder
Uniformly, and on sponging granulator drying-granulating is carried out；
(2b) dry-pressing: the powder being granulated is laid in designed dry pressing die set and carries out dry-pressing formed, obtained dry-pressing base；
The sintering of (3b) dumping: carrying out dumping sintering for punching press green body, and wherein the dumping time is 60-100h, sintering time 40-
60h is to get the black zirconia ceramics；
It is described injection moulding the following steps are included:
(1c) internally mix: the black zirconia ceramics material compositions are uniformly mixed in internal mixer with binder, system
Make injection molding raw material；
(2c) is granulated: the pockets of raw material of internally mix is carried out extruding pelletization in pelletizer, produces particulate material of uniform size,
Grain length is in 2-3mm；
(3c) injection moulding: the particulate material being granulated is formed using injection (mo(u)lding) machine, produces green body, injection temperature is
160-175 DEG C, injection pressure is 30-60Mpa；
(4c) degreasing: first the green body being injection moulded is put in solvent and carries out extraction dewaxing, then the green body for having taken off wax is put into
Thermal debinding is carried out in draft glue discharging furnace, solvent degreasing temperature is 45-55 DEG C, degreasing time 15-20h, and thermal debinding temperature is 400-500
DEG C, degreasing time 45-55h；
(5c) sintering: the green body for having taken off rouge is put into sintering furnace and is sintered, makes green body at porcelain, sintering temperature 1300-1600
DEG C, sintering time is 25-35h to get the black zirconia ceramics.
The preferred embodiment of preparation method as black zirconia ceramics of the present invention, in the tape casting,
Dispersing agent in step (1a) is at least one of polyacrylic acid, polyethylene glycol and glycerol, the bonding in the step (1a)
Agent is at least one of PVB, DOP, BBP, DBP；It is described it is dry-pressing formed in, dispersing agent in step (1b) be PEG, DBS and
At least one of polyacrylic, the binder in step (1b) are at least one of PVA, PMMA；The injection moulding
In, the binder in step (1c) is the mixture of polypropylene, polyethylene and paraffin.
In the tape casting, dispersing uniformity of the powder in casting slurry directly affects the quality of base film, thus shadow
Ring the series of characteristics such as compactness, the porosity and the mechanical property of material.In tape-casting common dispersing agent have nonionic,
4 seed type of anion, cation and amphoteric ion.Dispersing agent preferentially selects polyacrylic acid；During tape casting, in order to base
Plate material separation and taking and placing are convenient, and casting films must have certain intensity, toughness and ductility.For this purpose, needing to add in the slurry
Enter binder.Binder is divided into nonionic, anion and cationic 3 classes, binder preferred PVB, DOP, BBP, DBP by functional group
One or more.It is described it is dry-pressing formed in, the dispersibility of powder directly affects the mobility and apparent density of powder in dry-pressing,
And then influence compactness, the porosity and the mechanical property of material.Common dispersing agent is one kind of PEG, DBS and polyacrylic
Or it is several.And binder then influences the intensity of dry-pressing base, it is generally preferable to the one or more such as PVA, PMMA.
Black zirconia ceramics material compositions of the present invention, powder granularity is small, is uniformly dispersed, and contains its black oxygen
Change zircon ceramic covering power with higher and blackness, there is lower light transmittance.Black zirconia ceramics of the present invention, iron,
The atoms such as cobalt, chromium, aluminium, nickel, manganese form the surface cladding to the zirconia grains containing hafnium oxide, in the oxidation containing hafnium oxide
Zirconium grain surface forms one layer of oxide skin(coating), and the absorption by different colorants to visible wavelength is aoxidizing to reduce light
The reflection on zircon ceramic surface, and can have high blackness and good covering power in the case where being less than 1mm thickness.Black oxygen of the present invention
Change the preparation method of zircon ceramic material, technique preparation is simple, easy to operate, do not increase production process and workload, it can be achieved that volume production,
With preferable stability, homogenizing for product can be realized.
Specific embodiment
To better illustrate the object, technical solutions and advantages of the present invention, below in conjunction with specific embodiment to the present invention
It is described further.
Embodiment 1
A kind of embodiment of black zirconia ceramics material compositions of the present invention, black zirconia ceramics material described in the present embodiment
Composition contains the component of following mass percentage: yttrium oxide 6%, surplus are the zirconium oxide containing hafnium oxide；It is described containing
In the zirconium oxide of hafnium oxide, mass percentage of the hafnium oxide in the zirconium oxide containing hafnium oxide is 30%.
The black zirconia ceramics material compositions of the present embodiment are powder, and the powder D50 granularity is 3um, specific surface
Product is 5m2/g.
Embodiment 2
A kind of embodiment of black zirconia ceramics material compositions of the present invention, black zirconia ceramics material described in the present embodiment
Composition contains the component of following mass percentage: iron oxide 2%, cobalt oxide 1.5%, chromium oxide 1.5%, aluminium oxide 4%,
Nickel oxide 2%, manganese oxide 3.5%, zinc oxide 1.5%, yttrium oxide 4%, titanium oxide 3.5%, silica 3.5%, cerium oxide
3.5%, surplus is the zirconium oxide containing hafnium oxide；In the zirconium oxide containing hafnium oxide, hafnium oxide contains oxidation described
Mass percentage in the zirconium oxide of hafnium is 15%.
The black zirconia ceramics material compositions of the present embodiment are powder, and the powder D50 granularity is 1um, specific surface
Product is 20m2/g.
Embodiment 3
A kind of embodiment of black zirconia ceramics material compositions of the present invention, black zirconia ceramics material described in the present embodiment
Composition contains the component of following mass percentage: iron oxide 3%, cobalt oxide 2%, chromium oxide 3.5%, aluminium oxide 3%, oxygen
Change nickel 2.5%, manganese oxide 3%, zinc oxide 3%, yttrium oxide 3%, titanium oxide 3%, silica 3%, cerium oxide 3%, surplus
For the zirconium oxide containing hafnium oxide；In the zirconium oxide containing hafnium oxide, hafnium oxide is in the zirconium oxide containing hafnium oxide
In mass percentage be 10%.
The black zirconia ceramics material compositions of the present embodiment are powder, and the powder D50 granularity is 2um, specific surface
Product is 15m2/g.
Embodiment 4
A kind of embodiment of black zirconia ceramics material compositions of the present invention, black zirconia ceramics material described in the present embodiment
Composition contains the component of following mass percentage: iron oxide 4%, cobalt oxide 3.5%, chromium oxide 4%, aluminium oxide 2%, oxygen
Change nickel 4%, manganese oxide 1.5%, zinc oxide 3.5%, yttrium oxide 2%, titanium oxide 1.5%, silica 1 .5%, cerium oxide
1.5%, surplus is the zirconium oxide containing hafnium oxide；In the zirconium oxide containing hafnium oxide, hafnium oxide contains oxidation described
Mass percentage in the zirconium oxide of hafnium is 20%.
The black zirconia ceramics material compositions of the present embodiment are powder, and the powder D50 granularity is 0.1um, compare table
Area is 25m2/g.
Embodiment 5
A kind of embodiment of black zirconia ceramics material compositions of the present invention, black zirconia ceramics material described in the present embodiment
Composition contains the component of following mass percentage: iron oxide 5%, cobalt oxide 5%, chromium oxide 5%, aluminium oxide 5%, oxidation
Nickel 5%, manganese oxide 5%, zinc oxide 5%, yttrium oxide 5%, titanium oxide 5%, silica 5%, cerium oxide 5%, surplus be containing
There is the zirconium oxide of hafnium oxide；In the zirconium oxide containing hafnium oxide, hafnium oxide is in the zirconium oxide containing hafnium oxide
Mass percentage is 5%.
The black zirconia ceramics material compositions of the present embodiment are powder, and the powder D50 granularity is 2.5um, compare table
Area is 10m2/g.
Embodiment 6
The performance test of black zirconia ceramics
Test group 1~5 is arranged in the present embodiment, and embodiment 1 is respectively adopted in the black zirconia ceramics material of the test group 1~5
~5 black zirconia ceramics material compositions are prepared, and the black zirconia of test group 1~5 is using same preparation side
Method is prepared, and the preparation method comprises the following steps:
(1) by each material mixing contained by black zirconia ceramics material compositions, black zirconia ceramics combination of materials is obtained
Object；
(2) the black zirconia ceramics material compositions that step (1) obtains are formed, roasting obtains black zirconia pottery
Porcelain；
Tape casting, dry-pressing formed, injection moulding, hot-forming or gel casting are shaped in the step (2).
Wherein, the tape casting the following steps are included:
(1a) ball milling: by the black zirconia ceramics material compositions and dispersing agent and binder, (dispersing agent is preferably poly-
At least one of acrylic acid, polyethylene glycol and glycerol, at least one of described binder preferred PVB, DOP, BBP, DBP)
It is uniformly mixed in the ball mill；
(2a) tape casting: the slurry after ball milling is uniformly dispersed carries out tape casting in casting machine, adjusts casting technique ginseng
The curtain coating green body with a thickness of 0.2-1.1mm is made in number；
(3a) punch forming: curtain coating green body obtained being put in designed mold and carries out punch forming, and blank is made；
The sintering of (4a) dumping: carrying out dumping sintering for punching press green body, and wherein the dumping time is 60-100h, sintering time 40-
60h is to get the black zirconia ceramics；
It is described dry-pressing formed the following steps are included:
(1b) ball milling is granulated: by the black zirconia ceramics material compositions, (dispersing agent is preferred with dispersing agent, binder
At least one of PEG, DBS and polyacrylic, at least one of described binder preferred PVA, PMMA) in the ball mill
It is uniformly mixed, and carries out drying-granulating on sponging granulator；
(2b) dry-pressing: the powder being granulated is laid in designed dry pressing die set and carries out dry-pressing formed, obtained dry-pressing base；
The sintering of (3b) dumping: carrying out dumping sintering for punching press green body, and wherein the dumping time is 60-100h, sintering time 40-
60h is to get the black zirconia ceramics；
It is described injection moulding the following steps are included:
(1c) internally mix: by the black zirconia ceramics material compositions and binder (the preferred polypropylene of the binder, poly- second
The mixture of alkene and paraffin) carried out in internal mixer uniformly mixed, make injection molding raw material；
(2c) is granulated: the pockets of raw material of internally mix is carried out extruding pelletization in pelletizer, produces particulate material of uniform size,
Grain length is in 2-3mm；
(3c) injection moulding: the particulate material being granulated is formed using injection (mo(u)lding) machine, produces green body, injection temperature is
160-175 DEG C, injection pressure is 30-60Mpa；
(4c) degreasing: first the green body being injection moulded is put in solvent and carries out extraction dewaxing, then the green body for having taken off wax is put into
Thermal debinding is carried out in draft glue discharging furnace, solvent degreasing temperature is 45-55 DEG C, degreasing time 15-20h, and thermal debinding temperature is 400-500
DEG C, degreasing time 45-55h；
(5c) sintering: the green body for having taken off rouge is put into sintering furnace and is sintered, makes green body at porcelain, sintering temperature 1300-1600
DEG C, sintering time is 25-35h to get the black zirconia ceramics.
The molding mode that test group 1~5 uses is identical, and the polishing thickness of the black zirconia ceramics of test group 1~5 is also equal
Identical (being 0.5mm).Light transmittance, OD value, coloration under the 550nm wavelength of the black zirconia ceramics of test group 1~5 are surveyed respectively
It is worth, is as shown in table 1 at porcelain density, 3 flexural strengths and Vickers hardness, test result.
The performance test results of 1 black zirconia ceramics of table
Light transmittance under 3 test group of project test group 1 test group, 2 test group, 4 test group 5550nm wavelength
0.450.400.100.350.40OD value 3.53.86.03.54.0 chromatic value 4542204044 is at porcelain density (g/cm3)
5.86.06.15.96.1 3 12001250124012201210 Vickers hardnesses of flexural strength (Mpa)
12001234122512051225
As seen from the results in Table 1, black zirconia ceramics of the invention covering power with higher and black, lower light transmittance,
Especially the black zirconia ceramics of test group 3, effect are more preferable.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention rather than protects to the present invention
The limitation of range is protected, although the invention is described in detail with reference to the preferred embodiments, those skilled in the art should
Understand, it can be with modification or equivalent replacement of the technical solution of the present invention are made, without departing from the essence of technical solution of the present invention
And range.
Claims (8)
1. a kind of black zirconia ceramics material compositions, which is characterized in that the ingredient comprising following mass percentage: oxidation
Iron 0-5%, cobalt oxide 0-5%, chromium oxide 0-5%, aluminium oxide 0-5%, nickel oxide 0-5%, manganese oxide 0-5%, zinc oxide 0-
5%, yttrium oxide 2-6%, titanium oxide 0-5%, silica 0-5%, cerium oxide 0-5%, surplus are the oxidation containing hafnium oxide
Zirconium.
2. black zirconia ceramics material compositions as described in claim 1, which is characterized in that contain comprising following quality percentage
The ingredient of amount: iron oxide 2-4%, cobalt oxide 1.5-3.5%, chromium oxide 1.5-3.5%, aluminium oxide 2-4%, nickel oxide 2-4%,
Manganese oxide 1.5-3.5%, zinc oxide 1.5-3.5%, yttrium oxide 2-4%, titanium oxide 1.5-3.5%, silica 1 .5-
3.5%, cerium oxide 1.5-3.5%, surplus are the zirconium oxide containing hafnium oxide.
3. such as the described in any item black zirconia ceramics material compositions of claim 1~2, which is characterized in that the black
Zirconia ceramics material composition is powder, and powder D50 granularity is 0.1-3um, specific surface area 5-25m2/g.
4. a kind of black zirconia ceramics, which is characterized in that the black zirconia ceramics include as claims 1 to 3 is any
Black zirconia ceramics material compositions described in.
5. black zirconia ceramics as claimed in claim 4, which is characterized in that the black zirconia ceramics are polishing thickness
Light transmittance < 0.5 under 0.1-1.0mm, 550nm wavelength, OD value > 3.0, chromatic value L≤45 potsherd.
6. a kind of preparation method of the black zirconia ceramics as described in claim 4 or 5, which comprises the following steps:
(1) by each material mixing contained by black zirconia ceramics material compositions, black zirconia ceramics combination of materials is obtained
Object；
(2) the black zirconia ceramics material compositions that step (1) obtains are formed, roasting obtains black zirconia pottery
Porcelain；
Tape casting, dry-pressing formed, injection moulding, hot-forming or gel casting are shaped in the step (2).
7. the preparation method of black zirconia ceramics as claimed in claim 6, which is characterized in that in the step (2) at
Type be tape casting, it is dry-pressing formed or injection moulding；
The tape casting the following steps are included:
(1a) ball milling: the black zirconia ceramics material compositions are mixed in the ball mill with dispersing agent and binder
It is even；
(2a) tape casting: the slurry after ball milling is uniformly dispersed carries out tape casting in casting machine, adjusts casting technique ginseng
The curtain coating green body with a thickness of 0.2-1.1mm is made in number；
(3a) punch forming: curtain coating green body obtained being put in designed mold and carries out punch forming, and blank is made；
The sintering of (4a) dumping: carrying out dumping sintering for punching press green body, and wherein the dumping time is 60-100h, sintering time 40-
60h is to get the black zirconia ceramics；
It is described dry-pressing formed the following steps are included:
(1b) ball milling is granulated: the black zirconia ceramics material compositions are mixed in the ball mill with dispersing agent, binder
Uniformly, and on sponging granulator drying-granulating is carried out；
(2b) dry-pressing: the powder being granulated is laid in designed dry pressing die set and carries out dry-pressing formed, obtained dry-pressing base；
The sintering of (3b) dumping: carrying out dumping sintering for punching press green body, and wherein the dumping time is 60-100h, sintering time 40-
60h is to get the black zirconia ceramics；
It is described injection moulding the following steps are included:
(1c) internally mix: the black zirconia ceramics material compositions are uniformly mixed in internal mixer with binder, system
Make injection molding raw material；
(2c) is granulated: the pockets of raw material of internally mix is carried out extruding pelletization in pelletizer, produces particulate material of uniform size,
Grain length is in 2-3mm；
(3c) injection moulding: the particulate material being granulated is formed using injection (mo(u)lding) machine, produces green body, injection temperature is
160-175 DEG C, injection pressure is 30-60Mpa；
(4c) degreasing: first the green body being injection moulded is put in solvent and carries out extraction dewaxing, then the green body for having taken off wax is put into
Thermal debinding is carried out in draft glue discharging furnace, solvent degreasing temperature is 45-55 DEG C, degreasing time 15-20h, and thermal debinding temperature is 400-500
DEG C, degreasing time 45-55h；
(5c) sintering: the green body for having taken off rouge is put into sintering furnace and is sintered, makes green body at porcelain, sintering temperature 1300-1600
DEG C, sintering time is 25-35h to get the black zirconia ceramics.
8. the preparation method of black zirconia ceramics as claimed in claim 7, which is characterized in that state in tape casting, step
Dispersing agent in (1a) is at least one of polyacrylic acid, polyethylene glycol and glycerol, and the binder in the step (1a) is
At least one of PVB, DOP, BBP, DBP；It is described it is dry-pressing formed in, dispersing agent in step (1b) is PEG, DBS and poly- third
At least one of olefin(e) acid class, the binder in step (1b) are at least one of PVA, PMMA；In the injection moulding, step
Suddenly the binder in (1c) is the mixture of polypropylene, polyethylene and paraffin.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110078499A (en) * | 2019-05-16 | 2019-08-02 | 金业新材料科技(昆山)有限公司 | A kind of water system PMMA dry-pressing/isostatic pressing prilling powder and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110078499A (en) * | 2019-05-16 | 2019-08-02 | 金业新材料科技(昆山)有限公司 | A kind of water system PMMA dry-pressing/isostatic pressing prilling powder and preparation method thereof |
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