CN105295454B - A kind of ceramic coating slurry and preparation method thereof, ceramic coating and preparation method thereof and ball ring shaped sealing element and preparation method thereof - Google Patents
A kind of ceramic coating slurry and preparation method thereof, ceramic coating and preparation method thereof and ball ring shaped sealing element and preparation method thereof Download PDFInfo
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- CN105295454B CN105295454B CN201410302120.7A CN201410302120A CN105295454B CN 105295454 B CN105295454 B CN 105295454B CN 201410302120 A CN201410302120 A CN 201410302120A CN 105295454 B CN105295454 B CN 105295454B
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Abstract
The invention provides a kind of ceramic coating slurry and preparation method thereof, ceramic coating and preparation method thereof and ball ring shaped sealing element and preparation method thereof.The ceramic coating slurry of the present invention, including ceramic powder, lubricant, organic solvent, organic dispersing agent, binding agent and plastic agent；The ceramic powder includes boron nitride, aluminum oxide and silica；The organic solvent includes the first organic solvent and the second organic solvent, and first organic solvent and the second organic solvent are mixed to form azeotropic solvent.The problem of ceramic coating of the present invention solves manufacturing process total coating cracking, and the organic principle added do not influence on the coating air-tightness of made seal product.
Description
Technical field
The invention belongs to automotive field, more particularly to a kind of ceramic coating slurry and preparation method thereof, ceramic coating and its
Preparation method and ball ring shaped sealing element and preparation method thereof.
Background technology
Ball ring shaped sealing element used is mostly temperature-resistant graphite material in automobile exhaust pipe, and the confficient of static friction of graphite and
There is bigger difference between the coefficient of kinetic friction, cause joint to occur abnormal sound.Therefore need to coat heat-resisting lubrication in seal surface
Ceramic coating solve this problem, now widely used is BN（Boron nitride）、PTFE（Polytetrafluoroethylene (PTFE)）、Al2O3（Oxygen
Change aluminium）、SiO2（Silica）Hybrid ceramic coating material, using water as solvent, above-mentioned powder is mixed into water-based slurry, use
Roller is coated on soft graphite coiled material surface, then dries coating, in insertion woven wire and cross by a pair of rollers it
Between extruding formed one, finally compressing with mould, surface, which is made, the seal product of ceramic coating, so as to improve
The frictional behaviour of seal and joint, solves the problems, such as blast pipe abnormal sound.
There is following several big shortcomings in the preparation method of this ceramic coating：Ceramic powder is unable to shape in water-based slurry system
Into good dispersion effect, ceramic powder is caused to disperse uneven；During coating is dried, coating can be crimped and held
Split, and come off from graphite coiled material, and be difficult to insert to be reinforced in woven wire；The roller coating used in this technology
Method, the coating layer thickness of making is uneven, and adjustable scope is smaller, requires also higher to the viscosity of slurry.
The content of the invention
The present invention can crimp cracking to solve the ceramic coating of existing ball ring shaped sealing element.Cohesive force difference technical problem,
Cracking and the good ceramic coating slurry of cohesive force and preparation method thereof, ceramic coating and its preparation will not be crimped by providing a kind of coating
Method and ball ring shaped sealing element and preparation method thereof.
The invention provides a kind of ceramic coating slurry, the slurry includes ceramic powder, lubricant, organic solvent, had
Machine dispersant, binding agent and plastic agent；The ceramic powder includes boron nitride, aluminum oxide and silica；The organic solvent
Including the first organic solvent and the second organic solvent, it is molten that first organic solvent and the second organic solvent are mixed to form azeotropic
Agent.
The invention provides a kind of ceramic coating slurry using the organic solvent conduct after two kinds of mixing with identical boiling point
Solvent, makes ceramic coating slurry rate of volatilization in solidification more uniform, ceramic powder can be made to disperse more uniform, the ceramics being made
Coating will not ftracture during drying to come off, and is also beneficial to the stability of drying process, can adhere well to graphite
Coiled material surface, and be conducive to carrying out the operation of next step.The organic dispersing agent of the present invention, can be such that ceramic powder divides in the slurry
The stability of ceramic coating in drying process must be conducive to than more uniform by dissipating；Binding agent is by wrapping up ceramic powder, dried
It is self-curing in journey to form the three-dimensional resin framework being connected with each other, so that coating has certain intensity and toughness；Plastic agent
Addition can lift the plasticity of resin glue framework, the stress that absorber coatings are produced in the drying process makes coating unlikely
In cracking.
Present invention also offers a kind of preparation method of ceramic coating slurry of the present invention, this method is included ceramics
Powder, lubricant, organic solvent, organic dispersing agent, binding agent and plastic agent are mixed to get ceramic coating slurry.The system of the present invention
Preparation Method is simple, and the ceramic coating slurry prepared is uniformly dispersed.
Third object of the present invention there is provided a kind of preparation method of ceramic coating, and methods described is included ceramics painting
Layer slurry is coated in substrate surface, then drying to obtain ceramic coating；The ceramic coating slurry is pottery of the present invention
Porcelain coating paste.The ceramic coating prepared with the method for the present invention will not ftracture during drying to come off.
Fourth object of the present invention there is provided the ceramic coating of above method preparation.The ceramic coating of the present invention exists
It will not ftracture and come off in dry process.
The 5th purpose of the present invention there is provided a kind of preparation method of ball ring shaped sealing element, and methods described includes following
Step：
S1, ceramic coating slurry is coated on graphite paper and the cated graphite paper of tool is dried to obtain；
S2, obtaining reinforcing member containing pressing woven wire on cated graphite paper obtained by step S1；
S3, by woven wire be wrapped on mould and by graphite paper winding on a wire mesh, and outermost layer winding on
The reinforcing member prepared is stated, the ball ring shaped sealing element that surface possesses heat resistant ceramic coatings is produced in compression molding；
The ceramic coating slurry is ceramic coating slurry of the present invention.The ball prepared with the method for the present invention
The ceramic coating of lip ring will not ftracture during drying to come off.
The 6th purpose of the present invention there is provided the ball ring shaped sealing element prepared by the above method.The ball of the present invention
The ceramic coating of lip ring will not ftracture during drying to come off.In the present invention, so seal is in high-temperature low-oxygen
Worked under environment, the organic principle added in coating has largely been decomposed, organic matter contains in the coating paste of single present invention
Amount is few, so the agent structure to coating is not impacted, while also not interfering with the air-tightness of seal.
Embodiment
In order that technical problem solved by the invention, technical scheme and beneficial effect are more clearly understood, below in conjunction with
Embodiment, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only to explain
The present invention, is not intended to limit the present invention.
The invention provides a kind of ceramic coating slurry, the slurry includes ceramic powder, lubricant, organic solvent, had
Machine dispersant, binding agent and plastic agent；The ceramic powder includes boron nitride, aluminum oxide and silica；The organic solvent
Including the first organic solvent and the second organic solvent, it is molten that first organic solvent and the second organic solvent are mixed to form azeotropic
Agent.
According to ceramic coating slurry provided by the present invention, in order to reduce content of organics as far as possible, while can send out again
Corresponding efficiency is waved, the viscosity of slurry is controlled better, it is preferable that the boron nitride is 35-55 parts by weight, the oxidation
Aluminium is 3-10 parts by weight, and the silica is 3-10 parts by weight, and the lubricant is 40-60 parts by weight, the organic solvent
For 200-300 parts by weight, the organic dispersing agent is 2-6 parts by weight, and the plastic agent is 1.5-5 parts by weight, the binding agent
For 5-8 parts by weight.
According to ceramic coating slurry provided by the present invention, it is preferable that first organic solvent is ethanol, described second
Organic solvent is dimethylbenzene；Or first organic solvent is acetone, second organic solvent is methanol；Or described first have
Machine solvent is ethanol, and second organic solvent is methyl ethyl ketone.One, machine is preferably that first organic solvent is ethanol,
Second organic solvent is dimethylbenzene.In order to reduce cost and reduce pollution, further, the ethanol and the diformazan
The mass ratio of benzene is 1：0.25-0.65.The ethanol is 150-200 parts by weight, and the dimethylbenzene is 50-100 parts by weight.
According to ceramic coating slurry provided by the present invention, it is preferable that the mass ratio of the binding agent and the plastic agent
For 1：0.5-1.Plasticizer is the plasticity for adjusting binding agent, can cause coating fragility big if amount is very few, the effect not being plasticized
Really, the excessive effect that may result in the excessive influence coating of plasticity is measured.
According to ceramic coating slurry provided by the present invention, it is preferable that the binding agent is polyvinyl butyral resin, poly- third
At least one of e pioic acid methyl ester and ethyl cellulose.
According to ceramic coating slurry provided by the present invention, it is preferable that the polyvinyl alcohol contracting butyl ester is B30 and B60,
The B30 is 3-5 parts by weight, and the B60 is 5-7 parts by weight.
According to ceramic coating slurry provided by the present invention, it is preferable that the plastic agent is polyethylene glycol, phthalic acid
At least one of dibutyl ester, repefral, diethyl oxalate ester.It is further excellent in order to there is more preferable plasticity
Selection of land, the plastic agent is polyethylene glycol and dibutyl phthalate.It is further preferred that the polyethylene glycol and adjacent benzene
The mass ratio of dibutyl carboxylic acid is 1：0.8-1.2.The polyethylene glycol is 1.5-5 parts by weight, the fourth of phthalic acid two
Ester is 1.5-5 parts by weight.
According to ceramic coating slurry provided by the present invention, it is preferable that the organic dispersing agent is olein, phosphorus
At least one of acid esters and herring oil.More preferably olein, olein is organic substance, is easily burnt
Remove, other compositions are few.
According to ceramic coating slurry provided by the present invention, it is preferable that the lubricant is polytetrafluoroethylene (PTFE).
According to ceramic coating slurry provided by the present invention, it is preferable that the average grain diameter of the boron nitride is 1-3 μm, institute
The average grain diameter for stating aluminum oxide is 1-3 μm, and the average grain diameter of the silica is 1-5 μm, the average grain diameter of the lubricant
For 1-5 μm.If particle diameter is too big, coating may have gap, the phenomenon leaked air；Particle diameter is too small, specific surface energy
It is excessive, also it is unfavorable for the stabilization of slurry, and also the small powder cost of particle diameter is higher.
The invention provides a kind of preparation method of ceramic coating slurry described above, this method is included ceramic powder
Body, lubricant, organic solvent, organic dispersing agent, binding agent and plastic agent are mixed to get ceramic coating slurry.
According to preparation method provided by the present invention, specifically, ceramic powder, lubricant and organic are added in mixing tank
Solvent, and addition plastic agent and binding agent after organic dispersing agent, barreling 6-10h are added, and continue barreling 10-15h, ceramics are made
Coating paste.
Present invention also offers a kind of preparation method of ceramic coating, methods described includes ceramic coating slurry being coated in
Substrate surface, then drying to obtain ceramic coating；The ceramic coating slurry is ceramic coating slurry of the present invention.
According to preparation method provided by the present invention, it is preferable that the temperature of the drying is 50-80 DEG C.
There is the ceramic coating that the above method is prepared present invention also offers a kind of.
Present invention also offers a kind of preparation method of ball ring shaped sealing element, it the described method comprises the following steps：
S1, ceramic coating slurry is coated on graphite paper and the cated graphite paper of tool is dried to obtain；
S2, obtaining reinforcing member containing pressing woven wire on cated graphite paper obtained by step S1；
S3, by woven wire be wrapped on mould and by graphite paper winding on a wire mesh, and outermost layer winding on
The reinforcing member prepared is stated, the ball ring shaped sealing element that surface possesses heat resistant ceramic coatings is produced in compression molding；
The ceramic coating slurry is ceramic coating slurry of the present invention.
According to preparation method provided by the present invention, it is preferable that after the step S1 painting method be roller coat or
Scraper is coated.More preferably scraper is coated, and is replaced roller with scraper, in the hopper for slurry being poured into scraper, is passed through graphite
The relative motion of paper and the edge of a knife forms one layer of ceramic slurry coating on graphite paper, and can by adjust the height of the edge of a knife come
Control the thickness of coating.
According to preparation method provided by the present invention, it is preferable that the temperature of the drying is 50-80 DEG C.
According to preparation method provided by the present invention, specifically, ceramic coating slurry is poured into scraper hopper, and is flowed into
In the graphite coiled material base band of bottom, the height of the regulation edge of a knife is 1.0-1.5mm, passes through graphite coiled material base band and the relative fortune of scraper
It is dynamic, form that a thickness is uniform and adjustable ceramic slurry coating on base band surface, done under conditions of painting is placed on into 50-80 DEG C
It is dry, solvent is volatilized；Then cated graphite coiled material will be gathered around and cut and become band, and inserted in woven wire, flat plate mold is used
Pressurization is pressed into woven wire in coating and graphite coiled material, is reinforced coating, by the graphite coiled material and wire that have cut
Net is wrapped on mould, and winds the above-mentioned reinforcing member prepared in outermost layer, and compression molding produces surface and possesses heat-resisting pottery
The ball ring shaped sealing element of porcelain coating.
Present invention also offers a kind of ball ring shaped sealing element prepared by the above method.
The present invention is described in further detail below by specific embodiment.
Embodiment 1
Above-mentioned ceramic slurry composition proportion is as follows：Boron nitride（BN, average grain diameter is 2 μm）40g, polytetrafluoroethylene (PTFE) is micro-
Powder（PTFE, average grain diameter is 2 μm) 50g, aluminum oxide（Al2O3, average grain diameter is 2 μm）6 g, silica（SiO2, average grain diameter
For 2 μm）6 g, ethanol：150 g, the g of dimethylbenzene 50, olein（Dispersant）4 g, polyethylene glycol（Plastic agent）2.5
G, dibutyl phthalate（Plastic agent）2.5 g, polyvinyl butyral resin（Binding agent）8 g（Wherein 2 g B30,6 g
B60）.
Its manufacture craft is：1. load weighted BN, PTFE micro mist, aluminum oxide, silica and second are added in mixing tank
Polyethylene glycol, dibutyl phthalate and PVB are added after alcohol, dimethylbenzene and olein, barreling 8h（B30、B60）,
And continue barreling 12h, the ceramic slurry is made；2. slurry is poured into scraper hopper, and flows into the graphite coiled material base of bottom
Take, the height of the regulation edge of a knife is 1.2mm, and by the relative motion of graphite coiled material base band and scraper, one is formed on base band surface
Thickness is uniform and adjustable ceramic slurry coating, is dried under conditions of painting is placed on into 60 DEG C, solvent is volatilized；3. it will possess
The graphite coiled material of coating, which is cut, to become band, and inserts in woven wire, with flat plate mold pressurization woven wire be pressed into coating and
In graphite coiled material, coating is reinforced, the graphite coiled material and woven wire that have cut are wrapped on mould, and in outermost layer
The ball ring shaped sealing element A1 that surface possesses heat resistant ceramic coatings is produced in the above-mentioned reinforcing member prepared of winding, compression molding.
Embodiment 2
Above-mentioned ceramic slurry composition proportion is as follows：Boron nitride（BN, average grain diameter is 1 μm）55g, polytetrafluoroethylene (PTFE) is micro-
Powder（PTFE, average grain diameter is 1 μm) 40 g, aluminum oxide（Al2O3, average grain diameter is 1 μm）3 g, silica（SiO2, average grain diameter
For 1 μm）10 g, ethanol：180g, the g of dimethylbenzene 60, phosphate fat（Dispersant）2 g, polyethylene glycol（Plastic agent）2.5 g, it is adjacent
Dibatyl phithalate（Plastic agent）2 g, polyvinyl butyral resin（Binding agent）8 g（Wherein 2 g B30,6 g B60）.
Its manufacture craft is：1. load weighted BN, PTFE micro mist, aluminum oxide, silica and second are added in mixing tank
Polyethylene glycol, dibutyl phthalate and PVB are added after alcohol, dimethylbenzene and phosphate fat, barreling 8h（B30、B60）, and after
Continuous barreling 12h, is made the ceramic slurry；2. slurry is poured into scraper hopper, and flowed into the graphite coiled material base band of bottom,
The height for adjusting the edge of a knife is 1.5mm, by the relative motion of graphite coiled material base band and scraper, forms a thickness on base band surface equal
Even and adjustable ceramic slurry coating, dries under conditions of painting is placed on into 60 DEG C, solvent is volatilized；3. it will gather around cated
Graphite coiled material, which is cut, to become band, and inserts in woven wire, and woven wire is pressed into coating with flat plate mold pressurization and graphite is rolled up
In material, coating is reinforced, the graphite coiled material and woven wire that have cut are wrapped on mould, and in outermost layer winding
The reinforcing member prepared is stated, the ball ring shaped sealing element A2 that surface possesses heat resistant ceramic coatings is produced in compression molding.
Embodiment 3
Above-mentioned ceramic slurry composition proportion is as follows：Boron nitride（BN, average grain diameter is 3 μm）35g, polytetrafluoroethylene (PTFE) is micro-
Powder（PTFE, average grain diameter is 5 μm) 50 g, aluminum oxide（Al2O3, average grain diameter is 3 μm）10 g, silica（SiO2, average grain
Footpath is 5 μm）3 g, ethanol：200g, the g of methyl ethyl ketone 100, herring oil（Dispersant）6 g, polyethylene glycol（Plastic agent）1.2
G, dibutyl phthalate（Plastic agent）1.5g, polyvinyl butyral resin（Binding agent）8 g（Wherein 2 g B30,6 g
B60）.
Its manufacture craft is：1. load weighted BN, PTFE micro mist, aluminum oxide, silica and second are added in mixing tank
Polyethylene glycol, dibutyl phthalate and PVB are added after alcohol, dimethylbenzene and fish oil, barreling 8h（B30、B60）, and continue rolling
12h is ground, the ceramic slurry is made；2. slurry is poured into scraper hopper, and flowed into the graphite coiled material base band of bottom, adjusted
The height of the edge of a knife is 1.5mm, by the relative motion of graphite coiled material base band and scraper, a thickness is formed on base band surface uniform simultaneously
Adjustable ceramic slurry coating, dries under conditions of painting is placed on into 60 DEG C, solvent is volatilized；3. cated graphite will be gathered around
Coiled material, which is cut, to become band, and inserts in woven wire, and woven wire is pressed into coating and graphite coiled material with flat plate mold pressurization,
Coating is reinforced, the graphite coiled material and woven wire that have cut are wrapped on mould, and above-mentioned system is wound in outermost layer
The ball ring shaped sealing element A3 that surface possesses heat resistant ceramic coatings is produced in the reinforcing member got ready, compression molding.
Embodiment 4
Above-mentioned ceramic slurry composition proportion is as follows：Boron nitride（BN, average grain diameter is 2 μm）50g, polytetrafluoroethylene (PTFE) is micro-
Powder（PTFE, average grain diameter is 2 μm) 50 g, aluminum oxide（Al2O3, average grain diameter is 2 μm）6 g, silica（SiO2, average grain diameter
For 2 μm）6 g, acetone：180g, the g of methanol 60, herring oil（Dispersant）4 g, polyethylene glycol（Plastic agent）3 g, phthalic acid
Dimethyl ester（Plastic agent）3 g, PMA（Binding agent）8 g.
Its manufacture craft is：1. load weighted BN, PTFE micro mist, aluminum oxide, silica and second are added in mixing tank
Polyethylene glycol, repefral, PMA are added after alcohol, dimethylbenzene and herring oil, barreling 8h, and continues rolling
12h is ground, the ceramic slurry is made；2. slurry is poured into scraper hopper, and flowed into the graphite coiled material base band of bottom, adjusted
The height of the edge of a knife is 1.5mm, by the relative motion of graphite coiled material base band and scraper, a thickness is formed on base band surface uniform simultaneously
Adjustable ceramic slurry coating, dries under conditions of painting is placed on into 60 DEG C, solvent is volatilized；3. cated graphite will be gathered around
Coiled material, which is cut, to become band, and inserts in woven wire, and woven wire is pressed into coating and graphite coiled material with flat plate mold pressurization,
Coating is reinforced, the graphite coiled material and woven wire that have cut are wrapped on mould, and above-mentioned system is wound in outermost layer
The ball ring shaped sealing element A4 that surface possesses heat resistant ceramic coatings is produced in the reinforcing member got ready, compression molding.
Comparative example 1
The formula of emulsion is in the prior art：Boron nitride（BN）50g, ptfe micropowder（PTFE) 50 g, aluminum oxide
（Al2O3）6 g, silica（SiO2）6 g, water 250g.
Manufacture craft is：Mentioned component is added in mixing tank, ceramic slurry is made after barreling 8h, is coated with roller, will
In triplicate, obtain has certain thickness coating to this coating operation, and then coating is carried out in 80 DEG C of air ambient
Dry, then cut into required shape, insertion woven wire and applied by the way that woven wire is pressed between two rollers
In layer and graphite coiled material, so as to be reinforced to coating, the graphite coiled material and woven wire that have cut are wrapped on mould, and
Wind the above-mentioned reinforcing member prepared in outermost layer, compression molding, produce surface possess heat resistant ceramic coatings ball shape it is close
Sealing CA1.
Performance test
1st, ceramic coating adhesiving effect
Observed during ball ring shaped sealing element is prepared：
Ceramic coating made by 1-4 of embodiment of the present invention uniform coating thickness after the drying, comes off without cracking
There will not be coating during phenomenon, it is easy to cut, insertion woven wire and drop, with graphite coiled material base band adhesiving effect compared with
It is good；
Ceramic coating made by comparative example 1 coating cracking, warpage during drying, partial coating is from graphite coiled material
Come off in base band, the phenomenon of coating shedding, coating and graphite coiled material base band can also occur during cutting insertion woven wire
Adhesiving effect it is bad.
2nd, thermal weight loss is detected
Thermal weight loss test is carried out to product in oxygen-free environment, and contrasted with the thermal weight loss in air ambient.Specifically
Method is：It is raw material by the graphite of coating, is tested after the graphite seal product required for being pressed into using mould is compressing
The quality of sample, then respectively in nitrogen atmosphere 700 DEG C heat treatment 3h and vacuum environment under in 700 DEG C heat treatment 3h, then
Quality after test heat treatment, is contrasted.In nitrogen atmosphere in 700 DEG C of heat treatment the results are shown in Table under 1, vacuum environment of 3h
700 DEG C of heat treatment 3h the results are shown in Table 2.
3rd, air tightness test
Seal A1-A4 and CA1 are heat-treated 3h for 700 DEG C in nitrogen atmosphere.
Row will be respectively assembled to through Overheating Treatment seal A1-A4 and CA1 and the seal Jing Guo above-mentioned heat treatment
At the globe joint of tracheae, from the dry air that 1MPa pressure is passed through close to engine one end, go out gas by flow measurement and let out
Leakage quantity.It the results are shown in Table 3.
Table 1
。
Table 2
。
Table 3
。
As can be seen from Table 1 and Table 2, coating of the invention is after processing under the conditions of 700 DEG C of nitrogen atmospheres or 700 DEG C true
After being handled under the conditions of air atmosphere, seal mass loss is smaller.
From table 3 it is observed that the air-tightness of the seal after high-temperature process passes through the close of normal temperature processing with no
The air-tightness of sealing is more or less the same, and illustrates that the air-tightness of the seal of the present invention is good.
To sum up, the problem of ceramic coating of the invention solves manufacturing process total coating cracking, and added it is organic
Composition does not influence on the coating air-tightness of made seal product.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
Any modifications, equivalent substitutions and improvements made within refreshing and principle etc., should be included in the scope of the protection.
Claims (20)
1. a kind of ceramic coating slurry, it is characterised in that the slurry includes ceramic powder, lubricant, organic solvent, You Jifen
Powder, binding agent and plastic agent；The ceramic powder includes boron nitride, aluminum oxide and silica；The organic solvent includes
First organic solvent and the second organic solvent, first organic solvent and the second organic solvent are mixed to form azeotropic solvent；
The boron nitride is 35-55 parts by weight, and the aluminum oxide is 3-10 parts by weight, and the silica is 3-10 parts by weight,
The lubricant is 40-60 parts by weight, and the organic solvent is 200-300 parts by weight, and the organic dispersing agent is 2-6 weight
Part, the plastic agent is 1.5-5 parts by weight, and the binding agent is 5-8 parts by weight；
First organic solvent is ethanol, and second organic solvent is dimethylbenzene；Or first organic solvent is acetone,
Second organic solvent is methanol；Or first organic solvent is ethanol, second organic solvent is methyl ethyl ketone.
2. ceramic coating slurry according to claim 1, it is characterised in that first organic solvent is ethanol, described
Second organic solvent is dimethylbenzene.
3. ceramic coating slurry according to claim 2, it is characterised in that the ethanol is 150-200 parts by weight, described
Dimethylbenzene is 50-100 parts by weight.
4. ceramic coating slurry according to claim 1, it is characterised in that the quality of the binding agent and the plastic agent
Than for 1：0.5-1.
5. ceramic coating slurry according to claim 4, it is characterised in that the binding agent be polyvinyl butyral resin,
At least one of PMA and ethyl cellulose.
6. ceramic coating slurry according to claim 5, it is characterised in that the polyvinyl alcohol contracting butyl ester be B30 and
B60, the B30 are 3-5 parts by weight, and the B60 is 5-7 parts by weight.
7. the ceramic coating slurry according to claim any one of 4-6, it is characterised in that the plastic agent is poly- second two
At least one of alcohol, dibutyl phthalate, repefral and diethyl oxalate ester.
8. ceramic coating slurry according to claim 7, it is characterised in that the plastic agent is polyethylene glycol and adjacent benzene two
Formic acid dibutyl ester.
9. ceramic coating slurry according to claim 8, it is characterised in that the fourth of polyethylene glycol and phthalic acid two
The mass ratio of ester is 1：0.8-1.2.
10. ceramic coating slurry according to claim 9, it is characterised in that the polyethylene glycol is 1.5-5 parts by weight,
The dibutyl phthalate is 1.5-5 parts by weight.
11. ceramic coating slurry according to claim 1, it is characterised in that the organic dispersing agent is three oleics
At least one of ester, phosphate ester and herring oil.
12. ceramic coating slurry according to claim 1, it is characterised in that the lubricant is polytetrafluoroethylene (PTFE).
13. ceramic coating slurry according to claim 1, it is characterised in that the average grain diameter of the boron nitride is 1-3 μ
M, the average grain diameter of the aluminum oxide is 1-3 μm, the average grain diameter of the silica is 1-5 μm, and the lubricant is averaged
Particle diameter is 1-5 μm.
14. a kind of preparation method of the ceramic coating slurry described in claim 1-13 any one, it is characterised in that this method
Including ceramic powder, lubricant, organic solvent, organic dispersing agent, binding agent and plastic agent are mixed to get into ceramic coating slurry.
15. a kind of preparation method of ceramic coating, it is characterised in that methods described includes ceramic coating slurry being coated in base material
Surface, then drying to obtain ceramic coating；The ceramic coating slurry is the ceramics described in claim 1-13 any one
Coating paste.
16. preparation method according to claim 15, it is characterised in that the temperature of the drying is 50-80 DEG C.
17. a kind of ceramic coating, it is characterised in that the ceramic coating is prepared into as the method described in claim 15 or 16
Arrive.
18. a kind of preparation method of ball ring shaped sealing element, it is characterised in that the described method comprises the following steps：
S1, ceramic coating slurry is coated on graphite paper and the cated graphite paper of tool is dried to obtain；
S2, obtaining reinforcing member containing pressing woven wire on cated graphite paper obtained by step S1；
S3, woven wire is wrapped on mould and by graphite paper winding on a wire mesh, and wind above-mentioned system in outermost layer
The ball ring shaped sealing element that surface possesses heat resistant ceramic coatings is produced in the reinforcing member got ready, compression molding；
Wherein, the ceramic coating slurry is the ceramic coating slurry described in claim any one of 1-13.
19. preparation method according to claim 18, it is characterised in that S1 painting method applies for roller after the step
Cover or scraper coating.
20. a kind of ball ring shaped sealing element, it is characterised in that the seal is prepared into as the method described in claim 18 or 19
Arrive.
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|---|---|---|---|---|
| CN101462868B (en) * | 2009-01-05 | 2011-12-14 | 中国科学院上海硅酸盐研究所 | Method for preparing beta-alumina ceramic membrane |
| CN102701748A (en) * | 2012-07-04 | 2012-10-03 | 珠海微晶新材料科技有限公司 | Method for preparing zirconia ceramic knife by using coating method |
| CN102718498B (en) * | 2012-07-04 | 2013-11-06 | 珠海微晶新材料科技有限公司 | Coating preparation method for flakey aluminum oxide ceramic |
| CN102718497B (en) * | 2012-07-04 | 2014-01-15 | 珠海微晶新材料科技有限公司 | Coating preparation method for flaky zirconium oxide ceramic |
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2014
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