CN107759230A - A kind of toughening ceramic gel-casting method - Google Patents
A kind of toughening ceramic gel-casting method Download PDFInfo
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Abstract
The invention belongs to field of ceramic preparation technology.At present structural ceramics in preparation process exist dry when it is easy to crack and not easy processing the problem of, for the problems of the prior art, the present invention provides a kind of toughening ceramic gel-casting method, including the step such as the modification of ceramic raw material, the preparation of stable dispersion ceramic slurry, the casting of ceramic wet blank and drying and heat treatment.The approach such as drying means of the present invention by the way that ceramic body is pre-processed and improved to ceramic raw material, improve polymeric microstructure, improve the plasticity of ceramic body, substantially increase the drying property of wet base and the machinability of ceramic dry body.
Description
Technical field
The present invention relates to a kind of preparation method of ceramic material, and in particular to a kind of toughening ceramic gel casting forming side
Method, belong to field of ceramic preparation technology.
Background technology
At present in industrial production, the requirement to material is more and more harsher, and structural ceramics is due to its excellent mechanics and calorifics
Performance, by the more and more extensive industry-by-industry for being applied to industry.
Structural ceramics is prepared using wet moulding mostly.Wet moulding is that a kind of inject ceramic slurry in mould solidifies shape
Into the method for ceramic body, it is easy to prepare variously-shaped complicated ceramic by wet moulding, but it is traditional wet
Method moulding process such as injection forming can not ensure that the even density of molding blank is consistent, and due to the presence of liquid phase, in drying
Larger contraction easily occurs in sintering process, the defects of causing product cracking and the shape and size of product can not be ensured
Accuracy.
Gel injection-moulding is a kind of new structural ceramics wet process forming method, this method by ceramic grout forming technique with it is high
Molecular chemistry polymerization theory perfect adaptation, its principle are to prepare the ceramic slurry with low viscosity, high solid loading first, then
In the presence of initiator and catalyst, organic monomer and crosslinking agent crosslink, polymerize and forms tridimensional network, ceramics
Grain is locked in base substrate internal in-situ curing molding by tridimensional network, finally gives intensity height, even density, can carry out precision
Mach ceramic body.Gel casting process has for preparing complex-shaped, the uniform high performance ceramic material of component requirements
There is very important meaning.
However, the polymer rigid obtained by gel casting process is big, ceramic body residual stress is big, and base substrate is in drying
During easily occur cracking, deformation the defects of.In addition, although resulting green compact intensity is high, toughness is poor in process
In easily abrasion cutter.
Inventor develops a kind of structural ceramics water-base gel casting method before, and this method passes through in material solution
Middle addition glycerine or Tween 80 make plasticizer, improve the plasticity of molding blank, the residual stress of base substrate are reduced, certain
Alleviate the processing characteristics that the cracking phenomena in drying process improves base substrate in degree, but cracking of the base substrate when drying and
It is dried can processing problems still have much room for improvement.
The content of the invention
For the problems of the prior art, the present invention provides a kind of toughening ceramic gel-casting method, by pottery
Porcelain raw material is pre-processed, and improves polymeric microstructure to improve the plasticity of ceramic body, avoids wet base from being opened when drying
Split, increase the machinability of ceramic dry body.
To realize above technical purpose, the technical scheme is that：
A kind of toughening ceramic gel-casting method, this method include following steps：
(1) 0.1~1 μm of ceramic powder will be ground into ceramic raw material addition ball grinder, the ceramic powder is added to
In the mixed solution of second alcohol and water, polypyrrole alkanone (PVP) and ammoniacal liquor is added dropwise while stirring, then ultrasonic disperse at room temperature,
Then under conditions of continuously stirring, tetraethyl orthosilicate is added in above-mentioned solution, reacts at room temperature 4~24h, centrifugal drying obtains
Coated with silica ceramic powder；
(2) weigh organic monomer, crosslinking agent is put into beaker, add deionized water it is fully dissolved, then add point
Powder and water-based cosolvent are sufficiently stirred, and with ammoniacal liquor regulation system pH 8~11, then are added plasticizer in above-mentioned solution and are drawn
Hair agent stirs, and adds coated with silica ceramic powder in (1), adds catalysis after 10~30min of ultrasonic disperse at room temperature
Agent, the bubble being dissolved in ceramic slurry is removed in vacuum after quick stirring；
(3) ceramic slurry in (2) is carefully injected in mould, and mould is placed in 50~80 DEG C of water-baths and heats 5
~15min, obtain the ceramic wet blank solidified；At being processed after the demoulding after mould water cooling is obtained into ceramic wet blank drying and being hot
Reason, obtains ceramic, finally carries out quality testing.
In one embodiment, the volume ratio of the ethanol described in step (1), water and tetraethyl orthosilicate is (20~50)
: 1: the volume ratio of (1~2), water and ammoniacal liquor is (2~10): 1, ceramic powder accounts for whole system 1~10wt%, PVP and accounts for ceramic powder
1~5wt% of body；Organic monomer described in step (2) accounts for 1~3wt% of ceramic raw material, crosslinking agent and organic monomer quality
Than for 1: (5~30), deionized water account for 8~20wt% of ceramic raw material, dispersant accounts for ceramic raw material 0.5~2wt%, water-based molten altogether
Agent accounts for 0~10wt% of ionized water, and plasticizer accounts for 20~50wt% of organic monomer, initiator account for ceramic slurry 0.01~
1wt%, catalyst account for 0.01~1wt% of ceramic slurry.
In one embodiment, described organic monomer is acrylamide, Methacrylamide, N- methylol acryloyls
Amine, N-N ' methylene-bisacrylamides, Methacrylamide, acrylic acid, methacrylic acid are any in hydroxylethyl acrylate
It is a kind of；Described crosslinking agent is methylene-bisacrylamide (MBAM) or poly- (ethylene glycol) dimethacrylate
(PEGDAM)。
In one embodiment, described dispersant is citric acid, ammonium citrate (CT), hydroxymethyl cellulose, poly- third
Any one in olefin(e) acid and its copolymer (PAA), polyethyleneimine (PEI)；Described water-soluble cosolvent is ethanol, second two
Alcohol, normal propyl alcohol, 1,2-PD, n-butanol, BDO, 1,6- hexylene glycols, diglycol, triethylene-glycol,
Any one in polyethylene glycol 200, polyethylene glycol 400, Macrogol 600, glycerine.
In one embodiment, described plasticizer is polyethylene glycol, polymethacrylamide, glycerine or acetic acid three
Glycol；Described initiator is in ammonium persulfate (APS), hydrogen peroxide and hydrochloric acid azo [2- imidazoline -2- propane] (AZIP)
Any one.
In one embodiment, described catalyst is tetramethylethylenediamine (TEMED).
In one embodiment, described ceramic powder is aluminum oxide, zirconium oxide, silicon nitride or aluminium titanates.
In one embodiment, the drying of the ceramic wet blank is that ceramic wet blank first is immersed into ethanol water, then is put
Dried in constant temperature and humidity drying case, drying program is first arranged to 40 DEG C and the relative humidity more than 80%, is then arranged to 80
DEG C and the relative humidity less than 20%.
In one embodiment, the processing is that dry base substrate is placed on numerically controlled lathe and CNC milling machine to be processed
Test, processes ceramic external screw thread respectively.
In one embodiment, the heat treatment is that the ceramic green that will be processed is placed in degreasing in draft glue discharging furnace, then
1500~1700 DEG C of densified sintering product 2h are warming up to, heating schedule is first is warming up to 600 DEG C with 0.5~1 DEG C/min speed, insulation
1h, then 1500~1700 DEG C are warming up to 3~5 DEG C/min speed, 2h is incubated, ceramic is made.
From the above, it can be seen that the present invention possesses following beneficial effect：
1. by being pre-processed to obtain the ceramic powder of Surface coating silica to ceramic raw material, on the one hand, dioxy
The abundant hydroxyl in SiClx surface causes the hydrophily of ceramic powder particle surface to improve, and ceramic powder is easier to stable dispersion and obtained
The good ceramic slurry of dispersiveness so that the few ceramic body of even structure, internal flaw is obtained after in-situ solidifying；On the other hand,
The silica for being coated on ceramic powder surface both can overcome the disadvantages that the micro-crack of ceramic body surface appearance in drying process, improve pottery
The bending strength of porcelain billet body, moreover it is possible to which crystal grain is grown up during suppressing sintering, is formed fine and close homogeneous ceramic body, is played toughness reinforcing
Effect；
2. the method dried step by step with a temperature of in different humidity after the aqueous solution of alcohol when drying using being submerged initially in, can be achieved
The rapid draing of base substrate and effectively to avoid base substrate from occurring in the drying process dry and cracked.
3. with the addition of water-soluble cosolvent in ceramic slurry, it can reduce and be reacted in the viscosity and polymerization process of ceramic slurry
The viscosity of system, be advantageous to the in-situ solidifying of ceramic slurry；
4. changing the dispersing mode of ceramic powder into ultrasonication by ball mill ball milling, can avoid miscellaneous in mechanical milling process
The introducing of matter；
5. adding initiator before ultrasonic disperse, initiator can be uniformly distributed in ceramic slurry, and guarantee system each several part is anti-
It should simultaneously carry out, obtain the ceramic wet blank of even structure to reduce the residual stress inside base substrate, reduce base substrate in drying process
It is dry and cracked；
Embodiment
Below by examples of implementation, the features of the present invention is expanded on further, but the present invention is not limited to embodiment.
Embodiment 1：
Weigh 3g Methacrylamides, 0.6g MBAM are put into beaker, add 20g deionized waters it is fully dissolved, so
2g ammonium citrates are added afterwards to be sufficiently stirred, and with ammoniacal liquor regulation system pH 8~11, then 0.9g glycerine are added in above-mentioned solution
Stirred with 0.3ml10%APS, add 100g ceramic powders, add 0.03g TEMED after ultrasonic disperse 30min at room temperature,
The bubble being dissolved in ceramic slurry is removed in vacuum after quick stirring；Then ceramic slurry is carefully injected in mould, and by mould
5~15min of heating in 50~80 DEG C of water-baths is placed in, obtains the ceramic wet blank solidified；The demoulding after mould water cooling is obtained straight
Footpath is respectively 15mm, 35mm, 40mm, 43mm, 45mm wet base of ceramic rod；By the wet base of above-mentioned ceramic rod prior to drying at room temperature 72h,
It is subsequently placed in 80 DEG C of electrically heated drying cabinets and dries 12h；Dry after terminating, base substrate carries out lathe green compact using hard alloy cutter and added
Work M8 ceramic screw thread, is then placed in degreasing in draft glue discharging furnace by the ceramic green processed, is then warming up to 0.6 DEG C/min
600 DEG C, 1h is incubated, then 1600 DEG C are warming up to 3 DEG C/min, is incubated 2h.
As a result show, a diameter of 15mm ceramic rod is being dried and not cracking phenomenon in heat treatment process, sintering
Relative density occurs as soon as apparent cracking up to 99% after the ceramic rod drying of other diameters.It is diameter 15mm's from sample
Cylinder does green machined test, and green machined condition is that machine rotational speed is 100rpm, and corresponding superficial velocity is 9.4sm/min.
The amount of feeding turns for 0.35mm/, depth of cut 0.5mm.Green machined result shows that this blank strength is sufficiently high, but base substrate plasticity
It is bad, when processing M8 screw thread, angle severity is collapsed, and hard alloy cutter is worn severe.
Embodiment 2：
10g ceramic powders are added in the mixed solution of 100ml ethanol and 5ml water, the poly- pyrroles of 0.5g are added dropwise while stirring
Pyrrolidone (PVP) and 0.5g ammoniacal liquor, then ultrasonic disperse at room temperature, then under conditions of continuously stirring, by the positive silicon of 10ml
Acetoacetic ester is added in above-mentioned solution, reacts at room temperature 4~24h, and centrifugal drying obtains coated with silica ceramic powder.
Weigh 3g Methacrylamides, 0.6g MBAM are put into beaker, add 20g deionized waters it is fully dissolved, so
2g ammonium citrates are added afterwards to be sufficiently stirred, and with ammoniacal liquor regulation system pH 8~11, then 0.9g glycerine are added in above-mentioned solution
Stirred with 0.3ml 10%APS, add 100g coated with silica ceramic powders, added at room temperature after ultrasonic disperse 30min
Enter 0.03g TEMED, the bubble being dissolved in ceramic slurry is removed in vacuum after quick stirring；Then ceramic slurry is carefully injected into mould
In tool, and mould is placed in 5~15min of heating in 50~80 DEG C of water-baths, obtains the ceramic wet blank solidified；By mould water cooling
The demoulding obtains the wet base of ceramic rod that diameter is respectively 15mm, 35mm, 40mm, 43mm, 45mm afterwards；By the wet base of above-mentioned ceramic rod prior to
Drying at room temperature 72h, it is subsequently placed in 80 DEG C of electrically heated drying cabinets and dries 12h；Dry after terminating, base substrate is entered using hard alloy cutter
Bed green machined of driving a vehicle M8 ceramic screw thread, is then placed in degreasing in draft glue discharging furnace, then with 0.6 by the ceramic green processed
DEG C/min is warming up to 600 DEG C, 1h is incubated, then 1600 DEG C are warming up to 3 DEG C/min, it is incubated 2h.
As a result show, a diameter of 15mm and 35mm ceramic rod are not cracking existing in dry and heat treatment process
As sintering relative density is respectively 99% and 98%, obvious cracking occurs after the ceramic rod drying of other diameters.It is from sample
Diameter 15mm and 35mm ceramic rod do green machined test by the processing conditions in embodiment 1, as a result show, when processing screw thread
Do not occur collapsing angle phenomenon and less to Cutting Tool Damage, processing characteristics is improved.
Embodiment 3：
Weigh 3g Methacrylamides, 0.6g MBAM are put into beaker, add 20g deionized waters it is fully dissolved, so
2g ammonium citrates are added afterwards to be sufficiently stirred, and with ammoniacal liquor regulation system pH 8~11, then 0.9g glycerine are added in above-mentioned solution
Stirred with 0.3ml 10%APS, add obtained coated with silica ceramic powder in 100g embodiments 2, surpass at room temperature
Sound adds 0.03g TEMED after disperseing 30min, and the bubble being dissolved in ceramic slurry is removed in vacuum after quick stirring；Then will pottery
In the careful injection mould of porcelain slurry, and mould is placed in 5~15min of heating in 50~80 DEG C of water-baths, obtains the pottery solidified
The wet base of porcelain；The demoulding after mould water cooling is obtained into the wet base of ceramic rod that diameter is respectively 15mm, 35mm, 40mm, 43mm, 45mm；Will
The above-mentioned wet base of ceramic rod is submerged initially in 12h in ethanol water, then is placed in the constant temperature and humidity drying that 40 DEG C and relative humidity are 92%
48h is dried in case, it is dry 12h in 20% constant temperature and humidity drying case to be then placed in 80 DEG C and relative humidity again；Drying terminates
Afterwards, base substrate carries out lathe green machined M8 ceramic screw thread using hard alloy cutter, then puts the ceramic green processed
The degreasing in draft glue discharging furnace, 600 DEG C then are warming up to 0.6 DEG C/min, are incubated 1h, then 1600 DEG C of insulations are warming up to 3 DEG C/min
2h。
As a result show, a diameter of 15mm, 35mm and 40mm ceramic rod are not opened in drying and heat treatment process
Phenomenon is split, sintering relative density is respectively 99%, 98% and 97%, obvious cracking occurs after the ceramic rod drying of other diameters.
Green machined test is done by the processing conditions in embodiment 1 from the ceramic rod that sample is diameter 15mm and 35mm, is as a result shown,
Do not occur collapsing angle phenomenon and less to Cutting Tool Damage when processing screw thread, processing characteristics is improved.
Embodiment 4：
Weigh 3g Methacrylamides, 0.6g MBAM are put into beaker, add 18g deionized waters it is fully dissolved, so
Add 2g ammonium citrates afterwards and 2g ethanol is sufficiently stirred, added with ammoniacal liquor regulation system pH 8~11, then in above-mentioned solution
0.9g glycerine and 0.3ml 10%APS stir, and add obtained coated with silica ceramic powder in 100g embodiments 2
Body, 0.03g TEMED are added after ultrasonic disperse 30min at room temperature, the gas being dissolved in ceramic slurry is removed in vacuum after quick stirring
Bubble；Then ceramic slurry is carefully injected in mould, and mould is placed in 5~15min of heating in 50~80 DEG C of water-baths, obtained
The ceramic wet blank solidified；The demoulding after mould water cooling is obtained into the ceramics that diameter is respectively 15mm, 35mm, 40mm, 43mm, 45mm
The wet base of rod；The wet base of above-mentioned ceramic rod is submerged initially in 12h in ethanol water, then is placed in the constant temperature that 40 DEG C and relative humidity are 92%
48h is dried in constant humidity drying box, it is dry 12h in 20% constant temperature and humidity drying case to be then placed in 80 DEG C and relative humidity again；
Dry after terminating, base substrate carries out lathe green machined M8 ceramic screw thread, the pottery that then will be processed using hard alloy cutter
Porcelain green compact are placed in degreasing in draft glue discharging furnace, are then warming up to 600 DEG C with 0.6 DEG C/min, are incubated 1h, then be warming up to 3 DEG C/min
1600 DEG C of insulation 2h.
As a result show, a diameter of 15mm, 35mm, 40mm ceramic rod is not cracking in drying and heat treatment process
Phenomenon, sintering relative density is respectively 99%, 99% and 97%, slight cracking occurs after a diameter of 43mm ceramic rod drying,
There is obvious cracking in a diameter of 45mm ceramic rod after drying.Embodiment 1 is pressed from the ceramic rod that sample is diameter 15mm, 35mm
In processing conditions do green machined test, as a result show, do not occur collapsing when processing screw thread angle phenomenon and to Cutting Tool Damage compared with
Few, processing characteristics is improved.
Embodiment 5：
Weigh 3g Methacrylamides, 0.6g MBAM are put into beaker, add 20g deionized waters it is fully dissolved, so
Add 2g ammonium citrates afterwards and 2g ethanol is sufficiently stirred, added with ammoniacal liquor regulation system pH 8~11, then in above-mentioned solution
0.9g glycerine stirs, and adds obtained coated with silica ceramic powder in 100g embodiments 2, at room temperature ultrasonic disperse
0.3ml10%APS and 0.03g TEMED are added after 30min, the bubble being dissolved in ceramic slurry is removed in vacuum after quick stirring；
Then ceramic slurry is carefully injected in mould, and mould is placed in 5~15min of heating in 50~80 DEG C of water-baths, coagulated
Admittedly good ceramic wet blank；The demoulding after mould water cooling is obtained into the ceramic rod that diameter is respectively 15mm, 35mm, 40mm, 43mm, 45mm
Wet base；The wet base of above-mentioned ceramic rod is submerged initially in 12h in ethanol water, then to be placed in the constant temperature that 40 DEG C and relative humidity are 92% permanent
48h is dried in wet drying box, it is dry 12h in 20% constant temperature and humidity drying case to be then placed in 80 DEG C and relative humidity again；It is dry
After constipation beam, base substrate carries out lathe green machined M8 ceramic screw thread, the ceramics that then will be processed using hard alloy cutter
Green compact are placed in degreasing in draft glue discharging furnace, are then warming up to 600 DEG C with 0.6 DEG C/min, are incubated 1h, then be warming up to 1600 with 3 DEG C/min
DEG C insulation 2h.
As a result show, a diameter of 15mm, 35mm, 40mm ceramic rod is not cracking in drying and heat treatment process
Phenomenon, sintering relative density is respectively 99%, 99% and 98%, slight cracking occurs after the ceramic rod drying of other diameters
Phenomenon.Green machined test is done by the processing conditions in embodiment 1 from the ceramic rod that sample is diameter 15mm and 35mm, as a result
It has been shown that, do not occur collapsing angle phenomenon and less to Cutting Tool Damage when processing screw thread, processing characteristics is improved.
Embodiment 6
10g ceramic powders are added in the mixed solution of 100ml ethanol and 4ml water, the poly- pyrroles of 0.5g are added dropwise while stirring
Pyrrolidone (PVP) and 0.4g ammoniacal liquor, then ultrasonic disperse at room temperature, then under conditions of continuously stirring, by the positive silicic acid of 6ml
Ethyl ester is added in above-mentioned solution, reacts at room temperature 4~24h, and centrifugal drying obtains coated with silica ceramic powder.
Weigh 3gN- NMAs, 0.5g PEGDAM are put into beaker, add 20g deionized waters make its abundant
Dissolving, then add 2g PAA and 2.6g polyethylene glycol 200s and be sufficiently stirred, with ammoniacal liquor regulation system pH 8~11, then above-mentioned
0.8g acetic acid triethylene glycols are added in solution to stir, and add ultrasonic disperse at room temperature after 100g coated with silica ceramic powders
0.3ml10%AZIP and 0.03g TEMED are added after 30min, the bubble being dissolved in ceramic slurry is removed in vacuum after quick stirring；
Then ceramic slurry is carefully injected in mould, and mould is placed in 5~15min of heating in 50~80 DEG C of water-baths, coagulated
Admittedly good ceramic wet blank；The demoulding after mould water cooling is obtained into the ceramic rod that diameter is respectively 15mm, 35mm, 40mm, 43mm, 45mm
Wet base；The wet base of above-mentioned ceramic rod is submerged initially in 12h in ethanol water, then to be placed in the constant temperature that 40 DEG C and relative humidity are 92% permanent
48h is dried in wet drying box, it is dry 12h in 20% constant temperature and humidity drying case to be then placed in 80 DEG C and relative humidity again；It is dry
After constipation beam, base substrate carries out lathe green machined M8 ceramic screw thread, the ceramics that then will be processed using hard alloy cutter
Green compact are placed in degreasing in draft glue discharging furnace, are then warming up to 600 DEG C with 0.6 DEG C/min, are incubated 1h, then be warming up to 1600 with 3 DEG C/min
DEG C insulation 2h.
As a result show, a diameter of 15mm, 35mm, 40mm ceramic rod is not cracking in drying and heat treatment process
Phenomenon, sintering relative density is respectively 99%, 99% and 98%, slight cracking occurs after the ceramic rod drying of other diameters
Phenomenon.Green machined test is done by the processing conditions in embodiment 1 from the ceramic rod that sample is diameter 15mm and 35mm, as a result
It has been shown that, do not occur collapsing angle phenomenon and less to Cutting Tool Damage when processing screw thread, processing characteristics is improved.
It is understood that although the present invention is disclosed as above with preferred embodiment, it is not limited to of the invention real
Apply the technical scheme described by example.It will be understood by those within the art that still the present invention can be modified or
Equivalent substitution, to reach identical technique effect；As long as satisfaction uses needs, all within protection scope of the present invention.
Claims (10)
1. a kind of toughening ceramic gel-casting method, it is characterised in that this method includes following steps：
(1) 0.1~1 μm of ceramic powder will be ground into ceramic raw material addition ball grinder, the ceramic powder is added to ethanol
In the mixed solution of water, polypyrrole alkanone (PVP) and ammoniacal liquor is added dropwise while stirring, then ultrasonic disperse at room temperature, then
Tetraethyl orthosilicate is being added in above-mentioned solution under conditions of continuously stirring, is reacting at room temperature 4~24h, centrifugal drying obtains dioxy
SiClx coating ceramic powder；
(2) weigh organic monomer, crosslinking agent is put into beaker, add deionized water it is fully dissolved, then add dispersant
It is sufficiently stirred with water-based cosolvent, with ammoniacal liquor regulation system pH 8~11, then plasticizer and initiator is added in above-mentioned solution
Stir, add coated with silica ceramic powder in (1), add catalyst after 10~30min of ultrasonic disperse at room temperature, soon
The bubble being dissolved in ceramic slurry is removed in vacuum after speed stirring；
(3) ceramic slurry in (2) is carefully injected in mould, and by mould be placed in 50~80 DEG C of water-baths heating 5~
15min, obtain the ceramic wet blank solidified；At being processed after the demoulding after mould water cooling is obtained into ceramic wet blank drying and being hot
Reason, obtains ceramic, finally carries out quality testing.
2. a kind of toughening ceramic gel-casting method as claimed in claim 1, it is characterised in that described in step (1)
The volume ratio of ethanol, water and tetraethyl orthosilicate is (20~50): 1: the volume ratio of (1~2), water and ammoniacal liquor is (2~10): 1, pottery
Porcelain powder accounts for whole system 1~10wt%, PVP and accounts for 1~5wt% of ceramic powder；Organic monomer described in step (2) accounts for ceramic original
The mass ratio of 1~3wt% of material, crosslinking agent and organic monomer is 1: (5~30), deionized water account for 8~20wt% of ceramic raw material,
Dispersant accounts for 0.5~2wt% of ceramic raw material, and water-based cosolvent accounts for 0~10wt% of ionized water, and plasticizer accounts for organic monomer
20~50wt%, initiator account for 0.01~1wt% of ceramic slurry, and catalyst accounts for 0.01~1wt% of ceramic slurry.
3. a kind of toughening ceramic gel-casting method as claimed in claim 1 or 2, it is characterised in that described is organic
Monomer is acrylamide, Methacrylamide, N hydroxymethyl acrylamide, N-N ' methylene-bisacrylamides, methacryl
Amine, acrylic acid, methacrylic acid, any one in hydroxylethyl acrylate；Described crosslinking agent is methylene bisacrylamide acyl
Amine (MBAM) or poly- (ethylene glycol) dimethacrylate (PEGDAM).
4. a kind of toughening ceramic gel-casting method as claimed in claim 1 or 2, it is characterised in that described is scattered
Agent is citric acid, ammonium citrate (CT), hydroxymethyl cellulose, polyacrylic acid and its copolymer (PAA), polyethyleneimine (PEI)
In any one；Described water-soluble cosolvent is ethanol, ethylene glycol, normal propyl alcohol, 1,2-PD, n-butanol, Isosorbide-5-Nitrae-fourth
Glycol, 1,6- hexylene glycols, diglycol, triethylene-glycol, polyethylene glycol 200, polyethylene glycol 400, polyethylene glycol
600th, any one in glycerine.
A kind of 5. toughening ceramic gel-casting method as claimed in claim 1 or 2, it is characterised in that described plasticising
Agent is polyethylene glycol, polymethacrylamide, glycerine or acetic acid triethylene glycol；Described initiator is ammonium persulfate (APS), mistake
Any one in hydrogen oxide and hydrochloric acid azo [2- imidazoline -2- propane] (AZIP).
A kind of 6. toughening ceramic gel-casting method as claimed in claim 1 or 2, it is characterised in that described catalysis
Agent is tetramethylethylenediamine (TEMED).
A kind of 7. toughening ceramic gel-casting method as claimed in claim 1, it is characterised in that described ceramic powder
For aluminum oxide, zirconium oxide, silicon nitride or aluminium titanates.
A kind of 8. toughening ceramic gel-casting method as claimed in claim 1 or 2, it is characterised in that the ceramic wet
The drying of base is that ceramic wet blank first is immersed into ethanol water, then is placed in constant temperature and humidity drying case and dries.
9. a kind of toughening ceramic gel-casting method as claimed in claim 1 or 2, it is characterised in that the processing is
Dry base substrate is placed on numerically controlled lathe and CNC milling machine and is processed test, processes ceramic external screw thread respectively.
A kind of 10. toughening ceramic gel-casting method as claimed in claim 1 or 2, it is characterised in that the heat treatment
It is that the ceramic green that will be processed is placed in degreasing in draft glue discharging furnace, then heats to 1500~1700 DEG C of densified sintering product 2h.
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