CN107540385A - A kind of green compact leaching liquid for improving ceramics strength - Google Patents
A kind of green compact leaching liquid for improving ceramics strength Download PDFInfo
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- CN107540385A CN107540385A CN201710780187.5A CN201710780187A CN107540385A CN 107540385 A CN107540385 A CN 107540385A CN 201710780187 A CN201710780187 A CN 201710780187A CN 107540385 A CN107540385 A CN 107540385A
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Abstract
The present invention relates to technical field of ceramic production, specifically a kind of green compact leaching liquid for improving ceramics strength, include the materials of following parts by weight：20~32 parts of carbon dust, 10~15 parts of graphene oxide, 12~18 parts of aluminium powder, 20~28 parts of Nano-sized Alumina Powder, 3~7 parts of boric acid, 5~12 parts of silicon-carbide particle, 0.2~1.5 part of coagulant, 0.1~0.8 part of dispersant, 0.1~1 part of surfactant, 3~8 parts of silane coupler, 40~53 parts of organic solvent；The present invention is using carbon dust and Nano-sized Alumina Powder as carrier, aluminium powder and silicon-carbide particle are loaded into the stomata of ceramic green, when carrying out biscuiting, carbon dust, which is carbonized, to be formed gas and is overflowed from stomata, and aluminium powder, carborundum, aluminum oxide are filled in stomata as filler, reduce the quantity and volume of stomata, when carrying out immersion liquid and biscuiting again, more filler can be filled in stomata, realize the reduction of ceramic product stomata quantity and volume, the cross-sectional area of the payload of ceramic product is improved, improves the intensity of ceramic.
Description
Technical field
The present invention relates to technical field of ceramic production, specifically a kind of green compact leaching liquid for improving ceramics strength.
Background technology
With the vessel that clay is fired ceramics, the vessel fired with china clay are porcelain.It is ceramic then be ceramics, stoneware and porcelain
General name.Ancients' ceramics are referred to as bowl.Every with clay and china clay both clays of different nature is raw material, by dispensing, into
Implements can be ceramics made of the technological processes such as type, drying, roasting.
Ceramics development history be Chinese civilization history an important part, China as four major acids ancient country it
One, progress and development for human society are made that the contribution of brilliance, wherein the invention and development of ceramics are with more unique meaning
Justice, each Chao Gedai ceramics have different artistic styles and different technical characteristics on Chinese history." China " in English is existing
The meaning of China, there is the meaning of ceramics again, clearly demonstrate that China is exactly " ceramic native place ".Porcelain is grasped early in European
Before manufacturing technology more than 1,000 years, Han nationality has just produced very exquisite ware.China is in the world earliest using ceramics
One of country, and Chinese porcelain enjoys the high praise of common people because of its high practicality and artistry.
But the low intensity of ceramics, it is easily broken during transportation, installation and use, therefore limit its application.
Because ceramic material is manufactured with the method for sintering, there is stomata, crackle and glass phase, i.e. amorphous phase on crystal boundary
Deng and sometimes transgranular there is also stomata, fault, the defects of dislocation, these microstructure factors have to the intensity of ceramics
Significant impact.Wherein stomata is one of Main Tissues defect of most ceramics, and stomata significantly reduces load effect
Cross-sectional area, while stomata is also the place for causing stress concentration.For sintered body ceramics, only crystal grain chi is made
It is very little it is of different sizes and other tissue parameter all identical sample when it is extremely difficult；The presence of the grain boundary glassy phase of ceramics is to intensity
Make what is paid no attention to, so the quantity of grain boundary glassy phase should be reduced as far as possible, and its crystallization is made by heat treatment.Accordingly, for ceramics
The very big one side of improvement of intensity has been fallen on the porosity for reducing ceramics.
The content of the invention
It is an object of the invention to provide a kind of ceramic green leaching liquid, in green compact are reduced during ceramics manufacture
Stomata quantity and volume.
To achieve these goals, the present invention is achieved using following technical scheme：A kind of life for improving ceramics strength
Base leaching liquid, include the material of following parts by weight：20~32 parts of carbon dust, 10~15 parts of graphene oxide, 12~18 parts of aluminium powder, receive
20~28 parts of alumina powder of rice, 3~7 parts of boric acid, 5~12 parts of silicon-carbide particle, 0.2~1.5 part of coagulant, dispersant 0.1
~0.8 part, 0.1~1 part of surfactant, 3~8 parts of silane coupler, 40~53 parts of organic solvent.
Further, the material of following parts by weight is included according to the present invention, described green compact leaching liquid：Carbon dust 25~30
Part, 11~14 parts of graphene oxide, 15~18 parts of aluminium powder, 22~25 parts of Nano-sized Alumina Powder, 3~5 parts of boric acid, carborundum
8~10 parts of grain, 0.5~1.0 part of coagulant, 0.2~0.5 part of dispersant, 0.5~1 part of surfactant, silane coupler 5~8
Part, 45~50 parts of organic solvent.
In the present invention, the carrier of nano aluminium oxide and carbon dust as other solid packings, aluminium powder, silicon-carbide particle are loaded into
In the stomata of ceramic green, when carrying out biscuiting, carbon dust is carbonized to form gas, overflows stomata again, then after carrying out immersion liquid, aluminium
Powder, silicon-carbide particle are again introduced into stomata, so repeat to fill at the stomata in ceramic green, reduce the gentle hole body of stomata quantity
Product, improve the payload cross-sectional area of ceramic product, it is ensured that the intensity of ceramic improves.
Graphene is the individual layer laminated structure being made up of carbon atom, has excellent electrical and thermal conductivity, high intensity, high rigidity
The features such as, graphene oxide is one of derivative of graphene, has similar structure to graphene, simply in two-dimentional basal plane and
Edge, which is connected with oxygen-containing functional group and organic solvent, has preferable compatibility, is easy to implement scattered；Meanwhile described carbonization
It is coupled with graphene oxide by silane coupler after silicon grain oxidation, biscuiting is carried out after ceramic green immersion liquid, the carborundum
Grain and the oxygen-containing functional group of graphene remove at high temperature, and now, silicon-carbide particle and graphene are filled in the gas of ceramic green
Kong Zhong, play the purpose for reducing stoma number and pore volume.
According to the present invention, the particle diameter of described aluminium powder is 30~100 μm.
According to the present invention, described coagulant is NH4Cl。
According to the present invention, described dispersant is acrylic copolymer ammonium salt, one kind in ammonium polyacrylate salt, polypropylene
Acid ammonium salt dispersant preferably uses the ammonium polyacrylate dipersant of hydrophobically modified, has good dispersion effect, can reduce
The viscosity of filler, improve the stability of filler.
According to the present invention, heretofore described silane coupler is amino silicane coupling agent, aminopropyl-triethoxy silicon
Alkane, aminopropyl trimethoxysilane, 2- aminoethylaminopropyls trimethoxy silane, divinyl triammonium base propyl trimethoxy silicon
Alkane, aminoethylaminopropyl methyl dimethoxysilane, aminoethylaminopropyl triethoxysilane, ureidopropyltriethoxysilane
And at least one of ureido-propyl trimethoxy silane.
According to the present invention, the present invention does not have particular/special requirement to described organic solvent, can be those skilled in the art institute
Know, such as ethanol, methanol.
Surfactant can reduce the surface free energy of powder, and the surfactant is nonionic surfactant.
It is further preferred that the nonionic surfactant is ester type surfactant, ether type surfactant, amine type surface-active
At least one of agent, acid amide type surfactant and ester-ether type surfactant.It is specific as follows：Ester type surfactant can be with
For at least one of sorbitan fatty acid ester and polyoxyethylene fatty acid ester etc..Ether type surfactant can be polyoxy
At least one of vinyl alkyl alcohol ether and polyethenoxy alkylphenols etc..Amine surfactant can be Polyoxyethylene fatty
Amine etc..Acidamide surfactant can be such as polyoxyethylate amide.Ester ether surface active agent can be sorbitan esters of fatty
Acid ester polyoxyethylene ether type (tween type) etc..It is preferred that sorbitan fatty acid ester, polyoxyethylene fatty acid ester, polyoxyethylene fat
Fat amine, polyoxyethylate amide or APEO, more preferred polyoxyethylene fatty amine, polyoxyethylate amide or polyoxyethylene
Ether.Fat in wherein described fatty acid ester, fatty amine refers to C2-C4 straight-chain hydrocarbons.In alkyl alcohol ether, alkylbenzene phenolic ether
Alkyl is C2-C4 straight-chain hydrocarbons, it is furthermore preferred that the surfactant is Tween 80, polysorbate60, polysiloxane-grafted polyethers
At least one of compound.
Green compact leaching liquid provided by the invention, ceramic green is repeatedly impregnated, biscuiting, realize stomata in ceramic green
Effective reduction of quantity and volume, it is ensured that ceramic product has preferable intensity and toughness.
The present invention has following technique effect：
1st, aluminium powder and silicon-carbide particle are loaded into ceramics by the present invention using carbon dust and Nano-sized Alumina Powder as carrier
In the stomata of green compact, when carrying out biscuiting, carbon dust, which is carbonized, to be formed gas and is overflowed from stomata, and aluminium powder, carborundum, aluminum oxide are made
It is filled in for filler in stomata, reduces the quantity and volume of stomata, when carrying out immersion liquid and biscuiting again, will more can be filled out
Material be filled in stomata, realize the reduction of ceramic product stomata quantity and volume, improve ceramic product payload it is transversal
Area, improve the intensity of ceramic；
2nd, silicon-carbide particle and graphene oxide are coupled by silane coupler, improve its scattered effect in leaching liquid
Fruit, silicon-carbide particle and graphene oxide are filled in stomata jointly, and during biscuiting, high temperature removes oxy radical, such graphite
Alkene and silicon-carbide particle are just kept in stomata.
Embodiment
In order that the technical means, the inventive features, the objects and the advantages of the present invention are easy to understand, tie below
Specific embodiment is closed, the present invention is furture elucidated.
Embodiment 1
A kind of green compact leaching liquid for improving ceramics strength, include the material of following parts by weight：28 parts of carbon dust, graphene oxide
12 parts, 16 parts of aluminium powder, 23 parts of Nano-sized Alumina Powder, 4 parts of boric acid, 9 parts of silicon-carbide particle, coagulant NH40.8 part of Cl, propylene
0.3 part of acid copolymer ammonium salt, 0.8 part of Tween 80,7 parts of amino silicane coupling agent, 48 parts of ethanol；
The particle diameter of described aluminium powder is 60 μm.
Embodiment 2
A kind of green compact leaching liquid for improving ceramics strength, include the material of following parts by weight：25 parts of carbon dust, graphene oxide
11 parts, 15 parts of aluminium powder, 22 parts of Nano-sized Alumina Powder, 3 parts of boric acid, 8 parts of silicon-carbide particle, coagulant NH40.5 part of Cl, propylene
0.2 part of acid copolymer ammonium salt, 0.5 part of polysorbate60,5 parts of aminopropyl triethoxysilane, 45 parts of methanol；
The particle diameter of described aluminium powder is 40 μm.
Embodiment 3
A kind of green compact leaching liquid for improving ceramics strength, include the material of following parts by weight：30 parts of carbon dust, graphene oxide
14 parts, 18 parts of aluminium powder, 25 parts of Nano-sized Alumina Powder, 5 parts of boric acid, 10 parts of silicon-carbide particle, coagulant NH41.0 parts of Cl, gather
0.5 part of acrylic acid ammonium salt, 1 part of polysiloxane-grafted polyether compound, 8 parts of aminopropyl trimethoxysilane, 50 parts of ethanol；
The particle diameter of described aluminium powder is 80 μm.
Embodiment 4
A kind of green compact leaching liquid for improving ceramics strength, include the material of following parts by weight：20 parts of carbon dust, graphene oxide
10 parts, 12 parts of aluminium powder, 20 parts of Nano-sized Alumina Powder, 3 parts of boric acid, 5 parts of silicon-carbide particle, coagulant NH40.2 part of Cl, propylene
0.1 part of acid copolymer ammonium salt, 0.1 part of Tween 80,3 parts of 2- aminoethylaminopropyls trimethoxy silane, 40 parts of methanol；
The particle diameter of described aluminium powder is 30 μm.
Embodiment 5
A kind of green compact leaching liquid for improving ceramics strength, include the material of following parts by weight：32 parts of carbon dust, graphene oxide
15 parts, 18 parts of aluminium powder, 28 parts of Nano-sized Alumina Powder, 7 parts of boric acid, 12 parts of silicon-carbide particle, coagulant NH41.5 parts of Cl, gather
0.8 part of acrylic acid ammonium salt, 1 part of polysiloxane-grafted polyether compound, 8 parts of amino silicane coupling agent, 53 parts of ethanol；
The particle diameter of described aluminium powder is 100 μm.
The application method of green compact leaching liquid provided by the invention is：Green compact leaching liquid is put under hyperbaric environment, by ceramics
Green compact, which are immersed into green compact leaching liquid, to be impregnated, and then proposes to drain, then takes out carry out biscuiting, repeats biscuiting, dipping 2-3
It is secondary.Then glazing, glaze firing are carried out, natural cooling obtains the ceramics of high intensity, after embodiment 1-5 green compact leaching liquid leaching
Ceramics carry out correlated performance test, and recorded in table 1.
Ceramic product performance after the embodiment 1-5 of table 1 leachings
| The porosity/(%) | Bending strength/(Mpa) | |
| Embodiment 1 | 2.9 | 395 |
| Embodiment 2 | 2.8 | 392 |
| Embodiment 3 | 2.8 | 391 |
| Embodiment 4 | 2.6 | 389 |
| Embodiment 5 | 2.7 | 382 |
| Control group (does not leach) | 19.2 | 252 |
Using green compact leaching liquid provided by the invention it can be seen from data above, ceramic product can be effectively reduced
The porosity, improve bending strength.
General principle, principal character and the features of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement is both fallen within the range of claimed invention.The scope of protection of present invention is by appended claims
And its equivalent thereof.
Claims (6)
- A kind of 1. green compact leaching liquid for improving ceramics strength, it is characterised in that：Include the material of following parts by weight：Carbon dust 20~32 Part, 10~15 parts of graphene oxide, 12~18 parts of aluminium powder, 20~28 parts of Nano-sized Alumina Powder, 3~7 parts of boric acid, carborundum 5~12 parts of grain, 0.2~1.5 part of coagulant, 0.1~0.8 part of dispersant, 0.1~1 part of surfactant, silane coupler 3~8 Part, 40~53 parts of organic solvent.
- 2. the green compact leaching liquid according to claim 1 for improving ceramics strength, it is characterised in that：Described green compact leaching liquid Include the material of following parts by weight：25~30 parts of carbon dust, 11~14 parts of graphene oxide, 15~18 parts of aluminium powder, nano aluminium oxide 22~25 parts of powder, 3~5 parts of boric acid, 8~10 parts of silicon-carbide particle, 0.5~1.0 part of coagulant, 0.2~0.5 part of dispersant, 0.5~1 part of surfactant, 5~8 parts of silane coupler, 45~50 parts of organic solvent.
- 3. the green compact leaching liquid according to claim 1 for improving ceramics strength, it is characterised in that：The particle diameter of described aluminium powder For 30~100 μm.
- 4. the green compact leaching liquid according to claim 1 for improving ceramics strength, it is characterised in that：Described coagulant is NH4Cl。
- 5. the green compact leaching liquid according to claim 1 for improving ceramics strength, it is characterised in that：Described dispersant is third One kind in olefin(e) acid copolymer ammonium salt, ammonium polyacrylate salt.
- 6. the green compact leaching liquid according to claim 1 for improving ceramics strength, it is characterised in that：Described silane coupler For amino silicane coupling agent, aminopropyl triethoxysilane, aminopropyl trimethoxysilane, 2- aminoethylaminopropyl trimethoxies Silane, divinyl triammonium base propyl trimethoxy silicane, aminoethylaminopropyl methyl dimethoxysilane, aminoethylaminopropyl three At least one of Ethoxysilane, ureidopropyltriethoxysilane and ureido-propyl trimethoxy silane.
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