CN107473767A - A kind of aquamaine ground mass containing coating of titanium dioxide strengthens ultralight foamed ceramics and preparation method thereof - Google Patents
A kind of aquamaine ground mass containing coating of titanium dioxide strengthens ultralight foamed ceramics and preparation method thereof Download PDFInfo
- Publication number
- CN107473767A CN107473767A CN201710611748.9A CN201710611748A CN107473767A CN 107473767 A CN107473767 A CN 107473767A CN 201710611748 A CN201710611748 A CN 201710611748A CN 107473767 A CN107473767 A CN 107473767A
- Authority
- CN
- China
- Prior art keywords
- foamed ceramics
- aquamaine
- titanium dioxide
- strengthens
- ground mass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
- C04B35/18—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay rich in aluminium oxide
- C04B35/185—Mullite 3Al2O3-2SiO2
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
- C04B35/6261—Milling
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
- C04B35/62625—Wet mixtures
- C04B35/62635—Mixing details
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
- C04B35/62625—Wet mixtures
- C04B35/6264—Mixing media, e.g. organic solvents
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
- C04B35/62645—Thermal treatment of powders or mixtures thereof other than sintering
- C04B35/62655—Drying, e.g. freeze-drying, spray-drying, microwave or supercritical drying
-
- C04B35/803—
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
- C04B38/106—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam by adding preformed foams
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
- C04B41/5041—Titanium oxide or titanates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
- C04B41/87—Ceramics
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
- C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
- C04B2235/3481—Alkaline earth metal alumino-silicates other than clay, e.g. cordierite, beryl, micas such as margarite, plagioclase feldspars such as anorthite, zeolites such as chabazite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/5208—Fibers
- C04B2235/5216—Inorganic
- C04B2235/524—Non-oxidic, e.g. borides, carbides, silicides or nitrides
- C04B2235/5248—Carbon, e.g. graphite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
Abstract
The present invention, which provides a kind of aquamaine ground mass containing coating of titanium dioxide, strengthens ultralight foamed ceramics and preparation method thereof,Aquamaine ground mass containing coating of titanium dioxide prepared by the present invention strengthens ultralight foamed ceramics and is used as raw material using aquamaine stone powder,Sintering aid is used as using anorthite,Strengthened using polyvinyl alcohol micro-crystallization and ceramic powder hydrophobization dressing agent,Freeze-dried sintering obtains foamed ceramics,Negative pressure impregnation technique is recycled in the surface attachment titania gel layer of foamed ceramics,The aquamaine ground mass containing coating of titanium dioxide being prepared strengthens the uniform pore diameter of ultralight foamed ceramics,Isotropism,It is well combined between ceramic crystalline grain,The adhesive force that coating of titanium dioxide gets over ceramic crystalline grain is good,Impurities phase will not be introduced in the foamed ceramics being prepared,The performance of ceramics will not be weakened,Foamed ceramics base substrate processability is good,It can be cut,The processing of the techniques such as engraving,With high-strength,Lightweight,Hole is smooth,Surface zero defect,Thermal shock resistance improves.
Description
Technical field
The invention belongs to foam ceramic material technical field, and in particular to a kind of aquamaine ground mass containing coating of titanium dioxide increases
Strong ultralight foamed ceramics and preparation method thereof.
Background technology
Foamed ceramics is that have three-dimensional communication duct, the shape in duct, chi as the porous ceramics of foam-like in a kind of moulding
The porous material that very little, permeability, surface area agent chemical property can moderately regulate and control, have it is in light weight, intensity is high, high temperature resistant, corrosion resistant
Erosion, regeneration is simple, service life is long and the advantages that good filtering adsorptivity.Freeze drying process is to be used as original using ceramic slurry
Material, crystalline ice unidirectional growth is controlled while ceramic slurry freezes, processing is dried under lower pressure, now solvent ice
Distil and discharge, the pore structure of oriented alignment is formed in base substrate, is sintered to form base substrate afterwards.Base prepared by the preparation method
Body sintering shrinkage is small, preparation method is simple, and controllability is strong, and the mechanical strength of product is relatively preferable.
A kind of preparation method of porous crystalline state TiO2 foamed ceramicses disclosed in Chinese patent CN102503518B, by TiO2 powder
Body material, amphene equal solvent, organic dispersing agent and polystyrene binder are mixed with to form mix reagent, and ball-milling treatment obtains
Slurry, will material will freeze forming, the demoulding, the drying sublimation at 15-35 DEG C at room temperature, then be thermally treated resulting in through 600-1600 DEG C more
Hole crystalline state TiO2 foamed ceramicses.A kind of Si3N4/BAS foam ceramic materials of preparing disclosed in Chinese patent CN104496521B
Method, using Ludox as liquid phase, alpha-silicon nitride powders, barium oxide powder and alumina powder mixing are added, dispersant is added and glues
Agent ball milling is tied, foaming agent is added, through low temperature gel solidification drying and sintering, obtains Si3N4/BAS foam ceramic materials.By above-mentioned existing
There is technology to understand, be easier relative to other method to prepare high porosity foamed ceramics, and preparation technology by freeze-drying
Simply, but the stability of ceramic foam is not good enough to be solidified, it is necessary to add other materials auxiliary, inevitably weakens foam pottery
The intensity and stability in use of porcelain.
Kyanite is a kind of anorthic system high aluminum mineral raw material, alundum (Al2O3) and 36.9% titanium dioxide by 63.1%
Silicon is formed, and crystal has glassy lustre or pearly luster, at high temperature often along the extension of C axles in long column shape, needle-like, threadiness
Decompose and produce mullite and silica, while collided with obvious volume, the contraction of some matrix materials can be offset, make system
Product have the metastable characteristic of high volume, and kyanite also has acid and alkali-resistance in addition, corrosion-resistant, anti-impact force is strong, electric insulation
The features such as performance is good, also it is widely used in ceramic field.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of aquamaine ground mass containing coating of titanium dioxide to strengthen ultralight foam
Ceramics and preparation method thereof, foamed ceramics prepared by the present invention are helped using aquamaine stone powder as raw material using anorthite as sintering
Agent, is strengthened using polyvinyl alcohol micro-crystallization and ceramic powder hydrophobization dressing agent, and freeze-dried sintering obtains foamed ceramics base
Body, negative pressure impregnation technique attachment titania gel layer is recycled to be prepared uniform pore diameter, isotropism, between ceramic crystalline grain
The high-strength light foamed ceramics being well combined.
In order to solve the above technical problems, the technical scheme is that：
A kind of aquamaine ground mass containing coating of titanium dioxide strengthens ultralight foamed ceramics, the aquamaine containing coating of titanium dioxide
Ground mass strengthens ultralight foamed ceramics using aquamaine stone powder as raw material, using anorthite as sintering aid, utilizes polyvinylalcohol microsphere
Crystallization and the enhancing of ceramic powder hydrophobization dressing agent, freeze-dried sintering obtain foamed ceramics, recycle negative pressure impregnation technique
In the surface attachment titania gel layer of foamed ceramics.
As the preferred of above-mentioned technical proposal, the aquamaine ground mass containing coating of titanium dioxide strengthens ultralight foamed ceramics
Uniform pore diameter, isotropism, aperture are well combined between 30-200 μm, ceramic crystalline grain, the thickness 5- of coating of titanium dioxide
10μm。
The present invention, which also provides a kind of aquamaine ground mass containing coating of titanium dioxide, strengthens the preparation method of ultralight foamed ceramics, bag
Include following steps：
(1) ceramic slurry that 15-60% is made is added in deionized water with kyanite powder, adds anorthite as sintering
Auxiliary agent, ball milling disperse, and add carbon fiber, ceramic powder hydrophobization dressing agent and polyvinyl alcohol, regulation slurry pH value to 4.5-
6.5, THE ADIABATIC SHEAR IN stirring foaming obtains particle stabilized foam；
(2) particle stabilized foam prepared by step (1) is placed at -10 DEG C at once and freezes 12-24h, then at 0-10 DEG C
In the range of thaw 3-12h, repeat the freeze-thaw process 1-5 times, obtain foamed ceramics base substrate of the porosity between 92-98%,
It is sintered at 1400-1900 DEG C, foamed ceramics is obtained after cooling；
(3) foamed ceramics prepared by step (2) is totally submerged in 2mol/L hydrochloric acid, low speed shakes at 95-100 DEG C
Swing, take out and rinse drying, obtain the foamed ceramics of low-kappa number, then the foamed ceramics of low-kappa number is placed in silane-containing coupling agent
Oxalic acid solution in, room temperature low-speed oscillation, take out rinse drying obtains surface modification foamed ceramics；
(4) under negative pressure, the foamed ceramics that the surface prepared by step (3) is modified is immersed in TiO 2 sol
30min, repeat 3-5 times, after fully absorbing, be put into centrifugal slurry-wobbling machine and remove unnecessary precursor solution, dry, obtain containing two
The aquamaine ground mass of titania coating strengthens ultralight foamed ceramics.
As the preferred of above-mentioned technical proposal, in the step (1), the particle diameter of kyanite powder is 1-1.5 μm.
As the preferred of above-mentioned technical proposal, in the step (1), ceramic slurry, anorthite, carbon fiber, ceramic powder
The mass ratio of hydrophobization dressing agent and polyvinyl alcohol is 100：20-30：2-5:0.06-0.08：1.2-1.5.
As the preferred of above-mentioned technical proposal, in the step (1), the rotating speed of THE ADIABATIC SHEAR IN stirring is 1500-2500r/
min。
As the preferred of above-mentioned technical proposal, in the step (1), ceramic powder hydrophobization dressing agent is dodecyl sulphur
Sour sodium, sodium hexadecyl sulfate, cetyl chloride ammonium.
As the preferred of above-mentioned technical proposal, in the step (2), the heating rate of sintering is 4-5 DEG C/min.
It is silane coupled in the oxalic acid solution of silane-containing coupling agent in the step (2) as the preferred of above-mentioned technical proposal
The content of agent is 0.2-0.5%, and it is 1 that volume ratio is contained in oxalic acid solution:1:1 oxalic acid, second alcohol and water.
As the preferred of above-mentioned technical proposal, in the step (3), the condition of negative pressure is -20Pa.
Compared with prior art, the invention has the advantages that：
(1) primary raw material that the aquamaine ground mass containing coating of titanium dioxide prepared by the present invention strengthens in ultralight foamed ceramics is
As primary raw material, anorthite is calcium aluminium silicate mineral for kyanite and anorthite, and it is former to play lean property in sintering money anorthite
The effect of material, reduce drying for base substrate and shrink and deform, improve drying property, shorten drying time, reduce firing temperature, accelerate
The formation of mullite, and anorthite can be filled between the ceramic crystalline grain of foamed ceramics base substrate, made base substrate fine and close and reduced
Hole, the shortcomings of customer service ceramic core such as aluminum oxide and silica low intensity, high temperature deformation are big and depoling is difficult, further improve
The mechanical strength and dielectric properties of foamed ceramics, in addition, also containing a small amount of carbon fiber in ceramic slurry, carbon fiber is distributed in Tao Jing
Between further improve foamed ceramics mechanical strength.
(2) the aquamaine ground mass containing coating of titanium dioxide prepared by the present invention strengthens ceramic foam slurry in ultralight foamed ceramics
It is uniform and stable, without aiding in solidifying using modes such as gels, it also added surfactant in the present invention and base substrate reinforcing agent gather
Vinyl alcohol strengthens the stability of foam, and without binder removal during sintering, technique is simple, low production cost, and the foam prepared
Free from admixture phase in ceramic body, the performance of foamed ceramics will not be weakened, and be strengthened by the effect of anorthite and titanium dioxide
Active force between ceramic crystalline grain, the generation of defect is reduced, hole is smooth, and the mechanical strength of foamed ceramics further improves.
(3) aperture for the ultralight foamed ceramics of the enhancing of the aquamaine ground mass containing coating of titanium dioxide that the present invention is prepared is equal
It is even, isotropism, it is well combined between ceramic crystalline grain, the adhesive force that coating of titanium dioxide gets over ceramic crystalline grain is good, is prepared
Impurities phase will not be introduced in foamed ceramics, the performance of ceramics will not be weakened, foamed ceramics base substrate processability is good, can carry out
The technique processing such as cutting, engraving, has high-strength, lightweight, hole smooth, surface zero defect, thermal shock resistance improves.
Embodiment
The present invention is described in detail below in conjunction with specific embodiment, herein illustrative examples and explanation of the invention
For explaining the present invention, but it is not as a limitation of the invention.
Embodiment 1：
(1) using particle diameter as 1 μm kyanite powder add deionized water in be made 15% ceramic slurry, according to ceramic slurry
Material, anorthite, carbon fiber, the mass ratio of ceramic powder hydrophobization dressing agent and polyvinyl alcohol are 100：20：2:0.06：1.2, add
Enter anorthite as sintering aid, ball milling disperses 5h, adds carbon fiber, lauryl sodium sulfate and polyvinyl alcohol, adjusts slurry
PH value foams to obtain particle stabilized foam to 4.5 with 1500r/min speed THE ADIABATIC SHEAR IN stirring 10min.
(2) particle stabilized foam is placed at -10 DEG C at once and freezes 12h, then thaw 3h in the range of 0 DEG C, and repeating should
Freeze-thaw process 1 time, obtains foamed ceramics base substrate, is warming up to 1400 DEG C with 4 DEG C/min speed, is sintered 2h, cooling
After obtain foamed ceramics.
(3) foamed ceramics is totally submerged in 2mol/L hydrochloric acid, the low-speed oscillation at 95 DEG C, takes out and rinse drying,
The foamed ceramics of low-kappa number is obtained, then the foamed ceramics of low-kappa number is placed in the oxalic acid solution containing 0.2% silane coupler
In, it is 1 that volume ratio is contained wherein in oxalic acid solution:1:1 oxalic acid, second alcohol and water, room temperature low-speed oscillation, take out flushing and dry
The foamed ceramics being modified to surface.
(4) under negative pressure -20Pa, the foamed ceramics that surface is modified is immersed in 30min in TiO 2 sol, repeats 3
It is secondary, after fully absorbing, it is put into centrifugal slurry-wobbling machine and removes unnecessary precursor solution, dries, obtain containing coating of titanium dioxide
Aquamaine ground mass strengthens ultralight foamed ceramics.
Embodiment 2：
(1) using particle diameter as 1.5 μm kyanite powder add deionized water in be made 60% ceramic slurry, according to ceramics
Slurry, anorthite, carbon fiber, the mass ratio of ceramic powder hydrophobization dressing agent and polyvinyl alcohol are 100：30：5:0.08：1.5
Anorthite is added as sintering aid, ball milling disperses 5h, adds carbon fiber, cetyl chloride ammonium and polyvinyl alcohol, regulation slurry
Expect that to 6.5, particle stabilized foam is obtained with 2500r/min speed THE ADIABATIC SHEAR INs 10min stirring foaming for pH value.
(2) particle stabilized foam is placed at -10 DEG C at once and freezes 24h, then thaw 12h in the range of 10 DEG C, repeats
The freeze-thaw process 5 times, obtains foamed ceramics base substrate, is warming up to 1900 DEG C with 5 DEG C/min speed, is sintered 3h, cold
But foamed ceramics is obtained afterwards.
(3) foamed ceramics is totally submerged in 2mol/L hydrochloric acid, the low-speed oscillation at 100 DEG C, takes out and rinse drying,
The foamed ceramics of low-kappa number is obtained, then the foamed ceramics of low-kappa number is placed in the oxalic acid of the silane coupler containing 0.2-0.5%
It is 1 to contain volume ratio in solution, wherein in oxalic acid solution:1:1 oxalic acid, second alcohol and water, room temperature low-speed oscillation, take out to rinse and dry
It is dry to obtain the foamed ceramics of surface modification.
(4) under negative pressure -20Pa, the foamed ceramics that surface is modified is immersed in 30min in TiO 2 sol, repeats 5
It is secondary, after fully absorbing, it is put into centrifugal slurry-wobbling machine and removes unnecessary precursor solution, dries, obtain containing coating of titanium dioxide
Aquamaine ground mass strengthens ultralight foamed ceramics.
Embodiment 3：
(1) using particle diameter as 1.2 μm kyanite powder add deionized water in be made 45% ceramic slurry, according to ceramics
Slurry, anorthite, carbon fiber, the mass ratio of ceramic powder hydrophobization dressing agent and polyvinyl alcohol are 100：25：3:0.07：1.3
Anorthite is added as sintering aid, ball milling disperses 5h, adds carbon fiber, sodium hexadecyl sulfate and polyvinyl alcohol, regulation slurry
Expect that pH value to 5, foams to obtain particle stabilized foam with 1600r/min speed THE ADIABATIC SHEAR IN stirring 10min.
(2) particle stabilized foam is placed at -10 DEG C at once and freezes 18h, then thaw 6h in the range of 5 DEG C, and repeating should
Freeze-thaw process 3 times, obtains foamed ceramics base substrate, is warming up to 1600 DEG C with 4.2 DEG C/min speed, is sintered 2h, cold
But foamed ceramics is obtained afterwards.
(3) foamed ceramics is totally submerged in 2mol/L hydrochloric acid, the low-speed oscillation at 98 DEG C, takes out and rinse drying,
The foamed ceramics of low-kappa number is obtained, then the foamed ceramics of low-kappa number is placed in the oxalic acid solution containing 0.3% silane coupler
In, it is 1 that volume ratio is contained wherein in oxalic acid solution:1:1 oxalic acid, second alcohol and water, room temperature low-speed oscillation, take out flushing and dry
The foamed ceramics being modified to surface.
(4) under negative pressure -20Pa, the foamed ceramics that surface is modified is immersed in 30min in TiO 2 sol, repeats 4
It is secondary, after fully absorbing, it is put into centrifugal slurry-wobbling machine and removes unnecessary precursor solution, dries, obtain containing coating of titanium dioxide
Aquamaine ground mass strengthens ultralight foamed ceramics.
Embodiment 4：
(1) using particle diameter as 1.4 μm kyanite powder add deionized water in be made 25% ceramic slurry, according to ceramics
Slurry, anorthite, carbon fiber, the mass ratio of ceramic powder hydrophobization dressing agent and polyvinyl alcohol are 100：24：3:0.08：1.3
Anorthite is added as sintering aid, ball milling disperses 5h, adds carbon fiber, cetyl chloride ammonium and polyvinyl alcohol, regulation slurry
Expect that pH value to 5.5, foams to obtain particle stabilized foam with 2000r/min speed THE ADIABATIC SHEAR IN stirring 10min.
(2) particle stabilized foam is placed at -10 DEG C at once and freezes 20h, then thaw 10h in the range of 5 DEG C, and repeating should
Freeze-thaw process 3 times, obtains foamed ceramics base substrate, is warming up to 1600 DEG C with 4.5 DEG C/min speed, is sintered 3h, cold
But foamed ceramics is obtained afterwards.
(3) foamed ceramics is totally submerged in 2mol/L hydrochloric acid, the low-speed oscillation at 100 DEG C, takes out and rinse drying,
The foamed ceramics of low-kappa number is obtained, then the foamed ceramics of low-kappa number is placed in the oxalic acid solution containing 0.4% silane coupler
In, it is 1 that volume ratio is contained wherein in oxalic acid solution:1:1 oxalic acid, second alcohol and water, room temperature low-speed oscillation, take out flushing and dry
The foamed ceramics being modified to surface.
(4) under negative pressure -20Pa, the foamed ceramics that surface is modified is immersed in 30min in TiO 2 sol, repeats 5
It is secondary, after fully absorbing, it is put into centrifugal slurry-wobbling machine and removes unnecessary precursor solution, dries, obtain containing coating of titanium dioxide
Aquamaine ground mass strengthens ultralight foamed ceramics.
Embodiment 5：
(1) using particle diameter as 1.1 μm kyanite powder add deionized water in be made 50% ceramic slurry, according to ceramics
Slurry, anorthite, carbon fiber, the mass ratio of ceramic powder hydrophobization dressing agent and polyvinyl alcohol are 100：20：5:0.06：1.5
Anorthite is added as sintering aid, ball milling disperses 5h, adds carbon fiber, lauryl sodium sulfate and polyvinyl alcohol, regulation slurry
Expect that pH value to 4.5, foams to obtain particle stabilized foam with 2500r/min speed THE ADIABATIC SHEAR IN stirring 10min.
(2) particle stabilized foam is placed at -10 DEG C at once and freezes 12h, then thaw 3h in the range of 10 DEG C, and repeating should
Freeze-thaw process 5 times, obtains foamed ceramics base substrate, is warming up to 1400 DEG C with 5 DEG C/min speed, is sintered 2.5h, cold
But foamed ceramics is obtained afterwards.
(3) foamed ceramics is totally submerged in 2mol/L hydrochloric acid, the low-speed oscillation at 100 DEG C, takes out and rinse drying,
The foamed ceramics of low-kappa number is obtained, then the foamed ceramics of low-kappa number is placed in the oxalic acid solution containing 0.2% silane coupler
In, it is 1 that volume ratio is contained wherein in oxalic acid solution:1:1 oxalic acid, second alcohol and water, room temperature low-speed oscillation, take out flushing and dry
The foamed ceramics being modified to surface.
(4) under negative pressure -20Pa, the foamed ceramics that surface is modified is immersed in 30min in TiO 2 sol, repeats 5
It is secondary, after fully absorbing, it is put into centrifugal slurry-wobbling machine and removes unnecessary precursor solution, dries, obtain containing coating of titanium dioxide
Aquamaine ground mass strengthens ultralight foamed ceramics.
Embodiment 6：
(1) using particle diameter as 1 μm kyanite powder add deionized water in be made 30% ceramic slurry, according to ceramic slurry
Material, anorthite, carbon fiber, the mass ratio of ceramic powder hydrophobization dressing agent and polyvinyl alcohol are 100：23：4:0.06：1.4, add
Enter anorthite as sintering aid, ball milling disperses 5h, adds carbon fiber, lauryl sodium sulfate and polyvinyl alcohol, adjusts slurry
PH value foams to obtain particle stabilized foam to 6 with 1800r/min speed THE ADIABATIC SHEAR IN stirring 10min.
(2) particle stabilized foam is placed at -10 DEG C at once and freezes 24h, then thaw 3h in the range of 10 DEG C, and repeating should
Freeze-thaw process 3 times, obtains foamed ceramics base substrate, is warming up to 1450 DEG C with 4 DEG C/min speed, is sintered 2h, cooling
After obtain foamed ceramics.
(3) foamed ceramics is totally submerged in 2mol/L hydrochloric acid, the low-speed oscillation at 100 DEG C, takes out and rinse drying,
The foamed ceramics of low-kappa number is obtained, then the foamed ceramics of low-kappa number is placed in the oxalic acid solution containing 0.2% silane coupler
In, it is 1 that volume ratio is contained wherein in oxalic acid solution:1:1 oxalic acid, second alcohol and water, room temperature low-speed oscillation, take out flushing and dry
The foamed ceramics being modified to surface.
(4) under negative pressure -20Pa, the foamed ceramics that surface is modified is immersed in 30min in TiO 2 sol, repeats 4
It is secondary, after fully absorbing, it is put into centrifugal slurry-wobbling machine and removes unnecessary precursor solution, dries, obtain containing coating of titanium dioxide
Aquamaine ground mass strengthens ultralight foamed ceramics.
After testing, the aquamaine ground mass containing coating of titanium dioxide that prepared by embodiment 1-6 strengthens ultralight foamed ceramics and showed
There is the result of the porosity of the foamed ceramics of technology, thermal shock performance and mechanical strength as follows：
As seen from the above table, the aquamaine ground mass containing coating of titanium dioxide that prepared by the present invention strengthens the aperture of ultralight foamed ceramics
Small, porosity is high, and mechanical strength is good, and thermal shock performance is good.
The above-described embodiments merely illustrate the principles and effects of the present invention, not for the limitation present invention.It is any ripe
Know the personage of this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (10)
1. a kind of aquamaine ground mass containing coating of titanium dioxide strengthens ultralight foamed ceramics, it is characterised in that：It is described to contain titanium dioxide
The aquamaine ground mass of coating strengthens ultralight foamed ceramics using aquamaine stone powder as raw material, using anorthite as sintering aid, utilizes
Polyvinyl alcohol micro-crystallization and the enhancing of ceramic powder hydrophobization dressing agent, freeze-dried sintering obtain foamed ceramics, recycle negative
Impregnation technology is pressed in the surface attachment titania gel layer of foamed ceramics.
2. a kind of aquamaine ground mass containing coating of titanium dioxide according to claim 1 strengthens ultralight foamed ceramics, its feature
It is：The aquamaine ground mass containing coating of titanium dioxide strengthens the uniform pore diameter of ultralight foamed ceramics, isotropism, aperture between
30-200 μm, it is well combined between ceramic crystalline grain, 5-10 μm of the thickness of coating of titanium dioxide.
3. a kind of aquamaine ground mass containing coating of titanium dioxide strengthens the preparation method of ultralight foamed ceramics, it is characterised in that including
Following steps：
(1) ceramic slurry that 15-60% is made is added in deionized water with kyanite powder, anorthite is added and is helped as sintering
Agent, ball milling disperse, addition carbon fiber, ceramic powder hydrophobization dressing agent and polyvinyl alcohol, regulation slurry pH value to 4.5-6.5,
THE ADIABATIC SHEAR IN stirring foaming obtains particle stabilized foam；
(2) particle stabilized foam prepared by step (1) is placed at -10 DEG C at once and freezes 12-24h, then in 0-10 DEG C of scope
Interior defrosting 3-12h, repeats the freeze-thaw process 1-5 times, obtains foamed ceramics base substrate of the porosity between 92-98%,
It is sintered at 1400-1900 DEG C, foamed ceramics is obtained after cooling；
(3) foamed ceramics prepared by step (2) is totally submerged in 2mol/L hydrochloric acid, the low-speed oscillation at 95-100 DEG C,
Take out and rinse drying, obtain the foamed ceramics of low-kappa number, then the foamed ceramics of low-kappa number is placed in silane-containing coupling agent
In oxalic acid solution, room temperature low-speed oscillation, take out flushing drying and obtain the foamed ceramics of surface modification；
(4) under negative pressure, the foamed ceramics that the surface prepared by step (3) is modified is immersed in 30min in TiO 2 sol, weight
It is multiple 3-5 times, after fully absorbing, it is put into centrifugal slurry-wobbling machine and removes unnecessary precursor solution, dry, obtains applying containing titanium dioxide
The aquamaine ground mass of layer strengthens ultralight foamed ceramics.
4. a kind of aquamaine ground mass containing coating of titanium dioxide according to claim 3 strengthens the preparation side of ultralight foamed ceramics
Method, it is characterised in that：In the step (1), the particle diameter of kyanite powder is 1-1.5 μm.
5. a kind of aquamaine ground mass containing coating of titanium dioxide according to claim 3 strengthens the preparation side of ultralight foamed ceramics
Method, it is characterised in that：In the step (1), ceramic slurry, anorthite, carbon fiber, ceramic powder hydrophobization dressing agent and poly- second
The mass ratio of enol is 100：20-30：2-5:0.06-0.08：1.2-1.5.
6. a kind of aquamaine ground mass containing coating of titanium dioxide according to claim 3 strengthens the preparation side of ultralight foamed ceramics
Method, it is characterised in that：In the step (1), the rotating speed of THE ADIABATIC SHEAR IN stirring is 1500-2500r/min.
7. a kind of aquamaine ground mass containing coating of titanium dioxide according to claim 3 strengthens the preparation side of ultralight foamed ceramics
Method, it is characterised in that：In the step (1), ceramic powder hydrophobization dressing agent is lauryl sodium sulfate, hexadecyl hydrosulfate
Sodium, cetyl chloride ammonium.
8. a kind of aquamaine ground mass containing coating of titanium dioxide according to claim 3 strengthens the preparation side of ultralight foamed ceramics
Method, it is characterised in that：In the step (2), the heating rate of sintering is 4-5 DEG C/min.
9. a kind of aquamaine ground mass containing coating of titanium dioxide according to claim 3 strengthens the preparation side of ultralight foamed ceramics
Method, it is characterised in that：In the step (2), the content of silane coupler is 0.2- in the oxalic acid solution of silane-containing coupling agent
0.5%, containing volume ratio it is 1 in oxalic acid solution:1:1 oxalic acid, second alcohol and water.
10. a kind of aquamaine ground mass containing coating of titanium dioxide according to claim 3 strengthens the preparation of ultralight foamed ceramics
Method, it is characterised in that：In the step (3), the condition of negative pressure is -20Pa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710611748.9A CN107473767A (en) | 2017-07-25 | 2017-07-25 | A kind of aquamaine ground mass containing coating of titanium dioxide strengthens ultralight foamed ceramics and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710611748.9A CN107473767A (en) | 2017-07-25 | 2017-07-25 | A kind of aquamaine ground mass containing coating of titanium dioxide strengthens ultralight foamed ceramics and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107473767A true CN107473767A (en) | 2017-12-15 |
Family
ID=60595819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710611748.9A Withdrawn CN107473767A (en) | 2017-07-25 | 2017-07-25 | A kind of aquamaine ground mass containing coating of titanium dioxide strengthens ultralight foamed ceramics and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107473767A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112390627A (en) * | 2020-11-20 | 2021-02-23 | 深圳市喻园创投有限责任公司 | Kyanite/alumina prestressed ceramic and preparation method thereof |
-
2017
- 2017-07-25 CN CN201710611748.9A patent/CN107473767A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112390627A (en) * | 2020-11-20 | 2021-02-23 | 深圳市喻园创投有限责任公司 | Kyanite/alumina prestressed ceramic and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Chen et al. | Porous ceramics: Light in weight but heavy in energy and environment technologies | |
| CN103803934B (en) | A kind of nano silicon oxide heat-insulating heat-preserving material and normal temperature drying wet processing preparation method thereof | |
| Mao et al. | Porous ceramics with tri-modal pores prepared by foaming and starch consolidation | |
| CN109095948B (en) | Method for preparing foamed ceramic with communicated pore walls by using hollow microspheres | |
| CN110078425B (en) | Preparation method of light heat-insulating mullite nanofiber aerogel | |
| CN102716762B (en) | Ultrafine molecular sieve structured catalytic material based on porous silicon carbide carrier and preparation thereof | |
| CN105906370B (en) | A kind of preparation method for the three-dimensional network porous ceramics that bore diameter gradient distribution is presented | |
| CN105237029B (en) | Foam silicon carbide ceramics and preparation method thereof | |
| CN107010964A (en) | It is a kind of to strengthen the method for ultralight foamed ceramics blank strength | |
| CN111410523B (en) | Ultra-light porous fused quartz foam and preparation method thereof | |
| CN114195543B (en) | Mullite whisker/anorthite/SiO 2 Aerogel porous ceramic, preparation method thereof and heat insulation tile | |
| CN107043224A (en) | A kind of foam glass SiO2The preparation method of aeroge | |
| Mao | Processing of ceramic foams | |
| CN108585940A (en) | Phosphate porous ceramic and its preparation method and application | |
| CN108395240A (en) | The preparation method of lanthanum orthophosphate, lanthanum orthophosphate porous ceramics and its preparation method and application | |
| CN109320257B (en) | Preparation method of high-strength high-porosity porous silicon nitride ceramic | |
| CN107473767A (en) | A kind of aquamaine ground mass containing coating of titanium dioxide strengthens ultralight foamed ceramics and preparation method thereof | |
| CN106830961A (en) | A kind of zirconium oxide for having hole-closing structure strengthens the preparation method of alumina porous ceramic | |
| CN102976758B (en) | Preparation method of macroporous interconnection SiC ceramics | |
| CN106830957A (en) | A kind of nanometer level microporous heat-insulated clay | |
| WO2024078182A1 (en) | Preparation method for ceramic fiber filter pipe with high air permeability | |
| KR101462470B1 (en) | Method for manufacturing porous ceramics material and porous ceramics material using thereof | |
| CN108689638B (en) | Multifunctional foam adsorption plate and preparation method thereof | |
| CN113149696A (en) | Micron-sized yttrium oxide stabilized zirconia ceramic foam material with layered pore structure and preparation method thereof | |
| CN114874026A (en) | Preparation method of high-strength fiber composite zirconia foamed ceramic |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20171215 |