CN110655389A - Honeycomb ceramic with mesoporous nano alumina as matrix and preparation method thereof - Google Patents
Honeycomb ceramic with mesoporous nano alumina as matrix and preparation method thereof Download PDFInfo
- Publication number
- CN110655389A CN110655389A CN201911132880.7A CN201911132880A CN110655389A CN 110655389 A CN110655389 A CN 110655389A CN 201911132880 A CN201911132880 A CN 201911132880A CN 110655389 A CN110655389 A CN 110655389A
- Authority
- CN
- China
- Prior art keywords
- honeycomb ceramic
- blank
- mixer
- honeycomb
- drying
- 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.)
- Pending
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 45
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000011159 matrix material Substances 0.000 title claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 36
- 238000001035 drying Methods 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 24
- 238000005245 sintering Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000001125 extrusion Methods 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 238000005470 impregnation Methods 0.000 claims abstract description 3
- 238000004519 manufacturing process Methods 0.000 claims abstract description 3
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 3
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 239000008213 purified water Substances 0.000 claims description 19
- 238000002156 mixing Methods 0.000 claims description 17
- 239000003755 preservative agent Substances 0.000 claims description 14
- 230000002335 preservative effect Effects 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 12
- 239000003292 glue Substances 0.000 claims description 12
- 229910017604 nitric acid Inorganic materials 0.000 claims description 12
- 238000000465 moulding Methods 0.000 claims description 8
- 238000002791 soaking Methods 0.000 claims description 8
- 230000032683 aging Effects 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 230000007935 neutral effect Effects 0.000 claims description 7
- 229910052594 sapphire Inorganic materials 0.000 claims description 7
- 238000007493 shaping process Methods 0.000 claims description 7
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 7
- 238000007605 air drying Methods 0.000 claims description 6
- 229910052593 corundum Inorganic materials 0.000 claims description 6
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 4
- 229920000193 polymethacrylate Polymers 0.000 claims description 4
- 239000011230 binding agent Substances 0.000 claims description 3
- 244000275012 Sesbania cannabina Species 0.000 claims 1
- 238000004321 preservation Methods 0.000 claims 1
- 239000011148 porous material Substances 0.000 abstract description 6
- 230000035939 shock Effects 0.000 abstract description 6
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 abstract description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 abstract description 4
- 239000003054 catalyst Substances 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 229910052763 palladium Inorganic materials 0.000 abstract description 2
- 229910052697 platinum Inorganic materials 0.000 abstract description 2
- 239000010970 precious metal Substances 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 229910052703 rhodium Inorganic materials 0.000 abstract description 2
- 239000010948 rhodium Substances 0.000 abstract description 2
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 abstract description 2
- 241000219782 Sesbania Species 0.000 description 6
- 239000007767 bonding agent Substances 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 239000011812 mixed powder Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052878 cordierite Inorganic materials 0.000 description 1
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
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
- C04B35/10—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 aluminium oxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/02—Boron or aluminium; Oxides or hydroxides thereof
- B01J21/04—Alumina
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
- B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/61—Surface area
- B01J35/615—100-500 m2/g
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/64—Pore diameter
- B01J35/647—2-50 nm
-
- 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/0006—Honeycomb structures
-
- 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
- C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
-
- 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
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
- C04B2235/3227—Lanthanum oxide or oxide-forming salts thereof
-
- 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
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3279—Nickel oxides, nickalates, or oxide-forming salts thereof
-
- 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
- C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
-
- 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
- C04B2235/616—Liquid infiltration 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
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6562—Heating rate
-
- 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
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6567—Treatment time
-
- 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
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
-
- 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
-
- 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
- C04B2235/9669—Resistance against chemicals, e.g. against molten glass or molten salts
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Structural Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Catalysts (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention discloses a honeycomb ceramic with mesoporous alumina as a matrix and a preparation method thereof, and mesoporous nano alumina is used as the matrixThe method is characterized in that a matrix raw material is formed by adopting an extrusion forming process, the surface performance of the honeycomb ceramic is improved by rare earth impregnation, and a mesoporous alumina honeycomb ceramic carrier is prepared by drying and sintering processes; the mesoporous nano alumina powder is used as a base material, so that the specific surface area of the honeycomb ceramic can be effectively improved, and the use amount of precious metal elements such as platinum, palladium, rhodium and the like can be reduced; according to the invention, based on the characteristic that the mesopores of the mesoporous nano alumina are 2-8nm, the pore diameter of the honeycomb ceramic catalyst can be regulated and controlled and is uniformly distributed; the invention has no pollution to the environment in the manufacturing process; the compressive strength of the honeycomb ceramic prepared by the invention is more than or equal to 51.7MPa, and the thermal conductivity reaches 5.110‑6K‑1The thermal shock resistance temperature reaches more than or equal to 800 ℃, and the related performance completely meets the national standards of honeycomb ceramics.
Description
Technical Field
The invention relates to honeycomb ceramic taking mesoporous alumina as a matrix and a preparation method thereof, in particular to honeycomb ceramic taking mesoporous Al2O3A method for preparing honeycomb ceramics by using raw materials, belonging to the technical field of honeycomb ceramics.
Background
As a functional porous material, the honeycomb ceramic has the characteristics of high specific surface area, good physical and chemical stability, low density, high permeability, good energy absorption performance, high temperature resistance, corrosion resistance, high chemical stability and dimensional stability, easiness in regeneration and the like, and is favored by people all the time. However, the widely used cordierite honeycomb ceramics have poor mechanical properties, high thermal conductivity, high thermal expansion and the like, which seriously hinders the application of the honeycomb ceramics.
Disclosure of Invention
The invention relates to a honeycomb ceramic with mesoporous alumina as a matrix and a preparation method thereof, wherein the preparation method comprises the following steps: the mesoporous nano alumina honeycomb ceramic carrier is prepared by using mesoporous nano alumina as a matrix raw material, adopting an extrusion molding process to mold, improving the surface performance of honeycomb ceramic through rare earth impregnation, and drying and sintering processes. In addition, the compressive strength of the honeycomb ceramic prepared by the invention is more than or equal to 51.7MPa, and the thermal conductivity reaches 5.110-6K-1The thermal shock resistance temperature reaches more than or equal to 800 DEG CThe relevant performance completely meets the national standards of honeycomb ceramics. The mesoporous nano honeycomb ceramic obtained by the invention has the advantages of low cost, good mechanical property, good corrosion resistance, good thermal shock resistance, high thermal conductivity and the like.
The technical scheme of the invention is as follows:
a preparation method of honeycomb ceramics taking mesoporous alumina as a matrix comprises the following specific steps:
(1) mesoporous Al2O3With alpha-Al2O3Adding a binder and a sintering aid according to a certain ratio, mixing, and then putting into a dry powder mixer for mixing for 2-4 h;
(2) taking the powder mixed in the step (1) out of a dry powder mixer, transferring the powder to a wet material mixer, and adding HNO3CE-64 in purified water, HNO3The adding percentage of the raw materials is 0.1 to 0.2 percent, the adding percentage of the CE-64 is 0.6 to 1.0 percent, and then the raw materials are mixed by a mixer for 0.5 to 2 hours; dissolving neutral silica sol in 5-15 wt% of purified water and 20-40 wt% of purified water in a mixer, and mixing for 1-2 hr.
(3) Taking the mixed material obtained in the step (2), pugging for 1-3 times under a vacuum condition by a vacuum pug mill, sealing by a preservative film, and aging for 1-3 days at room temperature after sealing to obtain pug;
(4) extruding and molding the pug obtained in the step (3) by an extruder, wherein the size of the honeycomb body is a cylinder with the diameter of 35mm, the wall thickness of the honeycomb body is 0.1mm, and obtaining a green body after extrusion molding;
(5) carrying out primary shaping drying on the blank obtained in the step (4), wrapping the blank by using a preservative film, drying the blank in a microwave oven for 30-70 seconds, turning the blank to dry the blank for 30-70 seconds again, transferring the blank to an oven with the temperature of 85-90 ℃ and placing the blank for 1-3 days;
(6) placing the green body obtained in the step (5) in a muffle furnace, preserving heat at 400-600 ℃ for 2h for glue removal, and cooling to room temperature along with the furnace;
(7) after the glue is discharged in the step (6), the blank is subjected to La (NO) treatment at different concentrations3)3·6H2Soaking in O solution for different time, the concentration is 5% -15%, the soaking time is 1min-120min, and the air-blast drying oven is used for finishing soakingDrying for 2h at 120 ℃;
(8) and (4) taking the green body treated in the step (7), roasting the green body at different temperatures, raising the temperature to 1000-1400 ℃ at the temperature rise speed of 2 ℃/min, then preserving the heat for 1-3h, and cooling the green body to room temperature along with the furnace to obtain the honeycomb ceramic finished product.
Further, in the step (1), mesoporous Al is added2O3With alpha-Al2O3According to the ratio of 7:3, adding a bonding agent comprising sesbania powder and HPMC-200000, wherein the adding percentage of the sesbania powder is 5%, the adding percentage of the HPMC-200000 is 10%, and the adding percentage of the sintering aid CuO is 0.6%, mixing, then putting into a dry powder mixer, and mixing for 3 hours.
In the step (2), the powder mixed in the step (1) is taken out of the dry powder mixer, transferred to the wet material mixer, and HNO is added3And CE-64 in purified water (23.7%), HNO3The adding percentage of (1) is 0.15 percent, the adding percentage of CE-64 is 0.7 percent, and then the materials are mixed for 0.5 hour by a mixer; dissolving neutral silica sol in 10% pure water and 33.3% pure water, adding into a mixer, and mixing for 1.5 h.
And (3) pugging the mixed material obtained in the step (2) for 1 time in a vacuum condition by using a vacuum pug mill, sealing by using a preservative film, and aging for 1 day at room temperature after sealing to obtain the pug.
And (4) extruding and molding the pug obtained in the step (3) by an extruder, wherein the size of the honeycomb body is a cylinder with the diameter of 35mm, the wall thickness of the honeycomb body is 0.1mm, and obtaining a green body after extrusion molding.
And (5) primarily shaping and drying the green body obtained in the step (4), in order to ensure that the green body is uniformly dispersed in water when heated, reduce the evaporation speed of water and ensure that the green body is not cracked, wrapping the green body by using a preservative film, drying in a microwave oven for 60s, overturning, drying again for 40s, turning to an oven at 88 ℃ and placing for 2 days.
And (6) placing the green body obtained in the step (5) in a muffle furnace, preserving heat at 500 ℃ for 2h, discharging glue, and cooling to room temperature along with the furnace. Said step (c) is(7) After the rubber is discharged in the step (6), the blank is subjected to La (NO3) with different concentrations3Soaking in the solution for different times, wherein the concentrations are 5%, 10% and 15%, the soaking time is 1min, 3min, 5min, 60min and 120min, and drying in a forced air drying oven at 120 deg.C for 2 h.
And (8) sintering the green body treated in the step (7) at different temperatures, raising the temperature to 1150 ℃, 1250 ℃ and 1350 ℃ respectively at a temperature rise speed of 2 ℃/min, preserving the temperature for 2h, and cooling to room temperature along with the furnace to obtain a honeycomb ceramic finished product.
In the present invention, "%" is mass percent.
Compared with the prior art, the invention has the following advantages:
the mesoporous nano alumina powder is used as a base material, so that the specific surface area of the honeycomb ceramic can be effectively improved, and the use amount of precious metal elements such as platinum, palladium, rhodium and the like can be reduced; according to the invention, based on the characteristic that the mesopores of the mesoporous nano alumina are 2-8nm, the pore diameter of the honeycomb ceramic catalyst can be regulated and controlled and is uniformly distributed; the invention has no pollution to the environment in the manufacturing process; the compressive strength of the honeycomb ceramic prepared by the invention is more than or equal to 51.7MPa, and the thermal conductivity reaches 5.110-6K-1The thermal shock resistance temperature reaches more than or equal to 800 ℃, and the related performance completely meets the national standards of honeycomb ceramics.
Drawings
FIG. 1 is a sample specific surface area isotherm after sintering of a material;
FIG. 2 is a sample pore size distribution after sintering of a material;
Detailed Description
The invention will be further described with reference to specific embodiments, and the advantages and features of the invention will become apparent as the description proceeds. The examples are exemplary only and do not limit the scope of the invention in any way. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, and that such changes and modifications may be made without departing from the spirit and scope of the invention.
Example 1 Honeycomb ceramic based on mesoporous alumina and preparation method thereof
(1) Mesoporous Al2O3With alpha-Al2O3The mixed powder mixed according to the proportion of 7:3 is added with a bonding agent comprising sesbania powder and HPMC-200000 by weight percentage (the same below), wherein the sesbania powder is added by 5 percent of the mixed powder, the HPMC-200000 is added by 10 percent of the mixed powder, and a sintering aid CuO is added by 0.6 percent of the mixed powder, and then the mixture is put into a dry powder mixer to be mixed for 3 hours.
(2) Taking the powder mixed in the step (1) out of a dry powder mixer, transferring the powder to a wet material mixer, referring to the total weight of the dry powder in the mixer as percentage (the same below), and adding HNO3CE-64 (a commercially available product, mainly comprising ammonium polymethacrylate) was dissolved in purified water (20% by weight) containing HNO3The adding percentage of (1) is 0.15 percent, the adding percentage of CE-64 is 0.7 percent, and then the materials are mixed for 0.5 hour by a mixer; dissolving neutral silica sol in 10% of purified water and 30% of purified water in a mixer, and mixing for 1.5 h.
(3) And (3) pugging the mixed material obtained in the step (2) for 1 time under a vacuum condition by using a vacuum pug mill, sealing by using a preservative film, and aging for 1 day at room temperature after sealing to obtain the pug.
(4) And (4) extruding and molding the pug obtained in the step (3) by an extruder, wherein the size of the honeycomb body is a cylinder with the diameter of 35mm, the wall thickness of the honeycomb body is 0.1mm, and obtaining a green body after extrusion molding.
(5) And (4) carrying out primary shaping drying on the blank obtained in the step (4), wrapping the blank by using a preservative film, drying the blank in a microwave oven for 60s, turning over the blank, drying the blank again for 40s, and turning to an oven at 88 ℃ to be placed for 2 days.
(6) And (5) placing the green body obtained in the step (5) in a muffle furnace, preserving heat at 500 ℃ for 2h, discharging glue, and cooling to room temperature along with the furnace.
(7) After the glue is discharged in the step (6), the blank is placed in La (NO) with the concentration of 5 percent3)3·6H2Soaking in O solution for 5min, and drying in a forced air drying oven at 120 deg.C for 2 h.
(8) And (4) taking the green body treated in the step (7), heating the green body to 1150 ℃ at a heating rate of 2 ℃/min, preserving heat for 2 hours, and cooling the green body to room temperature along with the furnace to obtain a honeycomb ceramic finished product.
Embodiment 2 honeycomb ceramic using mesoporous alumina as matrix and preparation method thereof
(1) Mesoporous Al2O3With alpha-Al2O3According to the ratio of 7:3, adding a bonding agent comprising sesbania powder with the addition percentage of 5 percent and HPMC-200000 with the addition percentage of 10 percent and a sintering aid CuO with the addition percentage of 0.6 percent, mixing, then putting into a dry powder mixer, and mixing for 3 hours.
(2) Taking the powder mixed in the step (1) out of a dry powder mixer, transferring the powder to a wet material mixer, and adding HNO3CE-64 (ammonium polymethacrylate) is dissolved in purified water 23.7%, HNO3The adding percentage of (1) is 0.15 percent, the adding percentage of CE-64 is 0.7 percent, and then the materials are mixed for 0.5 hour by a mixer; dissolving neutral silica sol in 10% pure water and 33.3% pure water, adding into a mixer, and mixing for 1.5 h.
(3) And (3) pugging the mixed material obtained in the step (2) for 1 time under a vacuum condition by using a vacuum pug mill, sealing by using a preservative film, and aging for 1 day at room temperature after sealing to obtain the pug.
(4) And (4) extruding and molding the pug obtained in the step (3) by an extruder, wherein the size of the honeycomb body is a cylinder with the diameter of 35mm, the wall thickness of the honeycomb body is 0.1mm, and obtaining a green body after extrusion molding.
(5) And (4) carrying out primary shaping drying on the blank obtained in the step (4), wrapping the blank by using a preservative film, drying the blank in a microwave oven for 60s, turning over the blank, drying the blank again for 40s, and turning to an oven at 88 ℃ to be placed for 2 days.
(6) And (5) placing the green body obtained in the step (5) in a muffle furnace, preserving heat at 500 ℃ for 2h, discharging glue, and cooling to room temperature along with the furnace.
(7) After the glue is discharged in the step (6), the blank is placed in La (NO) with the concentration of 10 percent3)3·6H2Soaking in O solution for 3min, and finishing soakingDrying for 2h in an air drying oven at 120 ℃.
(8) And (4) taking the green body obtained after the treatment in the step (7), heating the temperature to 1250 ℃ at the heating rate of 2 ℃/min, preserving the heat for 2 hours, and cooling the green body to room temperature along with the furnace to obtain a honeycomb ceramic finished product.
Embodiment 3 Honeycomb ceramic using mesoporous alumina as matrix and preparation method thereof
(1) Mesoporous Al2O3With alpha-Al2O3According to the ratio of 7:3, adding a bonding agent comprising sesbania powder with the addition percentage of 5 percent and HPMC-200000 with the addition percentage of 10 percent and a sintering aid CuO with the addition percentage of 0.6 percent, mixing, then putting into a dry powder mixer, and mixing for 3 hours.
(2) Taking the powder mixed in the step (1) out of a dry powder mixer, transferring the powder to a wet material mixer, and adding HNO3CE-64 (ammonium polymethacrylate) is dissolved in purified water, the percentage of the purified water added is 25%, HNO3The adding percentage of (1) is 0.15 percent, the adding percentage of CE-64 is 0.7 percent, and then the materials are mixed for 0.5 hour by a mixer; dissolving neutral silica sol in 10% of purified water and 35% of purified water in a mixer, and mixing for 1.5 h.
(3) And (3) pugging the mixed material obtained in the step (2) for 1 time under a vacuum condition by using a vacuum pug mill, sealing by using a preservative film, and aging for 1 day at room temperature after sealing to obtain the pug.
(4) And (4) extruding and molding the pug obtained in the step (3) by an extruder, wherein the size of the honeycomb body is a cylinder with the diameter of 35mm, the wall thickness of the honeycomb body is 0.1mm, and obtaining a green body after extrusion molding.
(5) And (4) carrying out primary shaping drying on the blank obtained in the step (4), wrapping the blank by using a preservative film, drying the blank in a microwave oven for 60s, turning over the blank, drying the blank again for 40s, and turning to an oven at 88 ℃ to be placed for 2 days.
(6) And (5) placing the green body obtained in the step (5) in a muffle furnace, preserving heat at 500 ℃ for 2h, discharging glue, and cooling to room temperature along with the furnace.
(7) After the glue is discharged in the step (6), the blank is placed in La (NO) with the concentration of 15 percent3)3·6H2O solutionSoaking for 60min, and drying in a forced air drying oven at 120 deg.C for 2 h.
(8) And (4) taking the green body obtained after the treatment in the step (7), heating the temperature to 1250 ℃ at the heating rate of 2 ℃/min, preserving the heat for 2 hours, and cooling the green body to room temperature along with the furnace to obtain a honeycomb ceramic finished product.
Test example 1 Performance test of the honeycomb ceramic obtained by the present invention
The samples of the invention were tested for specific surface area, mechanical properties, corrosion resistance, thermal shock resistance and thermal conductivity, and the experimental results are shown in table 1. Experiments show that the invention has the advantages of large specific surface area, good mechanical property, good thermal shock resistance, high thermal conductivity, larger specific heat capacity and good corrosion resistance. The material performance completely meets the use performance of the honeycomb ceramics.
TABLE 1 Honeycomb ceramics Property Table
TABLE 2 specific surface area and pore size table of honeycomb ceramics
Experimental example 2 a sample obtained in example 1 of the present invention was used, and the specific surface area isotherm of the sintered sample was as shown in fig. 1, and the pore size distribution was as shown in fig. 2.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (10)
1. A preparation method of honeycomb ceramic with mesoporous alumina as a matrix is characterized in that mesoporous nano alumina is used as a matrix raw material, an extrusion molding process is adopted for molding, the surface performance of the honeycomb ceramic is improved through rare earth impregnation, and a mesoporous alumina honeycomb ceramic carrier is prepared through drying and sintering processes; the method comprises the following specific steps:
(1) mesoporous Al2O3With alpha-Al2O3Adding a binder and a sintering aid according to a certain ratio, mixing, and then putting into a dry powder mixer for mixing for 2-4 h;
(2) taking the powder mixed in the step (1) out of a dry powder mixer, transferring the powder to a wet material mixer, and adding HNO3CE-64 dissolved in purified water, HNO3The adding percentage of the raw materials is 0.1-0.2%, the adding percentage of the CE-64 is 0.6-1.0%, then the raw materials are mixed by a mixer for 0.5-1.5h, and the adding percentage of the purified water is 10-35%; dissolving neutral silica sol in 5-15 wt% of purified water and 20-40 wt% of purified water in a mixer for 1-2 hr;
(3) taking the mixed material obtained in the step (2), pugging for 1-3 times under a vacuum condition by a vacuum pug mill, sealing by a preservative film, and aging for 1-3 days at room temperature after sealing to obtain pug;
(4) extruding and molding the pug obtained in the step (3) by an extruder, wherein the size of the honeycomb body is a cylinder with the diameter of 2-5mm, the wall thickness of the honeycomb body is 0.1-1mm, and obtaining a green body after extrusion molding;
(5) carrying out primary shaping drying on the blank obtained in the step (4), wrapping the blank by using a preservative film, drying the blank in a microwave oven for 30-70 seconds, turning the blank to dry the blank for 30-70 seconds again, transferring the blank to an oven with the temperature of 85-90 ℃ and placing the blank for 1-3 days;
(6) placing the green body obtained in the step (5) in a muffle furnace, preserving heat at 400-600 ℃ for 1-3h for removing glue, and cooling to room temperature along with the furnace;
(7) after the glue is discharged in the step (6), the blank is subjected to La (NO) treatment at different concentrations3)3·6H2Soaking in O solution for different time with the concentration of 5-15% for 1-120min, and drying in a forced air drying oven at 150 deg.C for 2 h;
(8) and (4) taking the green body obtained after the treatment in the step (7), sintering at different temperatures, raising the temperature to 1000-1400 ℃ at the temperature rise speed of 2-10 ℃/min, then preserving the heat for 1-3h, and cooling to room temperature along with the furnace to obtain the honeycomb ceramic finished product.
2. The method according to claim 1, wherein the mesoporous Al is added in step (1)2O3With alpha-Al2O3According to the ratio of 7:3, adding a binder comprising sesbania powder in an amount of 3-10% and HPMC-200000 in an amount of 5-15% and a sintering aid CuO in an amount of 0.5-1.0%, mixing, and placing into a dry powder mixer for 2-4 h.
3. The preparation method according to claim 1, wherein in the step (2), the powder mixed in the step (1) is taken out of a dry powder mixer, transferred to a wet material mixer, and HNO is added3Dissolving CE-64 (ammonium polymethacrylate) in purified water (15-30%), HNO3The adding percentage of (1) is 0.1-0.2%, the adding percentage of CE-64 is 0.5-1.0%, then the materials are mixed by a mixer for 0.5-2 h; dissolving neutral silica sol in 5-15% of purified water and 20-40% of purified water in a mixer, and mixing for 2-4 h.
4. The preparation method according to claim 1, wherein the material mixed in the step (2) is taken in the step (3), pugging is carried out for 1-3 times under vacuum condition by a vacuum pug mill, then sealing is carried out by a preservative film, and aging is carried out for 1-3 days under room temperature condition after sealing to obtain the pug.
5. The preparation method according to claim 1, wherein in the step (4), the pug obtained in the step (3) is extruded and molded by an extruder, the size of the honeycomb body is a cylinder with the diameter of 2-5mm, the wall thickness of the honeycomb body is 0.1-1mm, and a green body is obtained after extrusion and molding.
6. The preparation method according to claim 1, wherein in the step (5), the blank obtained in the step (4) is subjected to primary shaping drying, wrapped with a preservative film, placed in a microwave oven for drying for 30-70s, turned over, dried for 30-70s again, and placed in an oven at 85-90 ℃ for 1-3 days.
7. The preparation method according to claim 1, wherein in the step (6), the green body obtained in the step (5) is placed in a muffle furnace, kept at the temperature of 400-600 ℃ for 1-3h for glue removal, and cooled to room temperature along with the furnace.
8. The method according to claim 1, wherein the green body is subjected to discharging in step (6) in step (7) and then subjected to La (NO) concentration variation3)3·6H2Soaking in O solution for different time with concentration of 5-15% for 1-120min, and drying in a forced air drying oven at 150 deg.C for 1-3 h.
9. The preparation method according to claim 1, wherein the green body treated in step (7) is taken in step (8), sintered at different temperatures, heated to 1000 ℃ and 1400 ℃ at a heating rate of 2-10 ℃/min, and then cooled to room temperature along with the furnace after heat preservation for 1-3h, thereby obtaining the honeycomb ceramic finished product.
10. A honeycomb ceramic obtained by the production method as set forth in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911132880.7A CN110655389A (en) | 2019-11-19 | 2019-11-19 | Honeycomb ceramic with mesoporous nano alumina as matrix and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911132880.7A CN110655389A (en) | 2019-11-19 | 2019-11-19 | Honeycomb ceramic with mesoporous nano alumina as matrix and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110655389A true CN110655389A (en) | 2020-01-07 |
Family
ID=69043869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911132880.7A Pending CN110655389A (en) | 2019-11-19 | 2019-11-19 | Honeycomb ceramic with mesoporous nano alumina as matrix and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110655389A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112225578A (en) * | 2020-11-13 | 2021-01-15 | 广州市怡森环保设备有限公司 | Honeycomb activated alumina product and preparation method thereof |
| CN112692961A (en) * | 2020-12-30 | 2021-04-23 | 中鸣(宁德)科技装备制造有限公司 | Beryllium oxide ceramic cold isostatic pressing forming process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1332706A (en) * | 1998-12-28 | 2002-01-23 | 康宁股份有限公司 | High strength/high surface area alumina ceramics |
| CN1684923A (en) * | 2002-07-31 | 2005-10-19 | 康宁股份有限公司 | Alumina-bound high strength ceramic honeycombs |
| CN104841424A (en) * | 2014-02-18 | 2015-08-19 | 中国石油化工股份有限公司 | Polymetallic reforming catalyst and preparation method thereof |
| CN105565899A (en) * | 2016-01-25 | 2016-05-11 | 江苏高淳陶瓷股份有限公司 | Preparation method of semitransparent honeycomb ceramic having visible light catalysis function |
| WO2018089968A1 (en) * | 2016-11-14 | 2018-05-17 | Georgia Tech Research Corporation | Pcstructures including supported polyamines and methods of making the supported polyamines |
-
2019
- 2019-11-19 CN CN201911132880.7A patent/CN110655389A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1332706A (en) * | 1998-12-28 | 2002-01-23 | 康宁股份有限公司 | High strength/high surface area alumina ceramics |
| CN1684923A (en) * | 2002-07-31 | 2005-10-19 | 康宁股份有限公司 | Alumina-bound high strength ceramic honeycombs |
| CN104841424A (en) * | 2014-02-18 | 2015-08-19 | 中国石油化工股份有限公司 | Polymetallic reforming catalyst and preparation method thereof |
| CN105565899A (en) * | 2016-01-25 | 2016-05-11 | 江苏高淳陶瓷股份有限公司 | Preparation method of semitransparent honeycomb ceramic having visible light catalysis function |
| WO2018089968A1 (en) * | 2016-11-14 | 2018-05-17 | Georgia Tech Research Corporation | Pcstructures including supported polyamines and methods of making the supported polyamines |
Non-Patent Citations (2)
| Title |
|---|
| M. YATES ET AL.: "Vapour adsorption capacity of controlled porosity honeycomb monoliths", 《MICROPOROUS AND MESOPOROUS MATERIALS》 * |
| 王珍珍: "介孔金属氧化物的制备及性能研究", 《中国优秀硕士学位论文全文数据库 工程科技I辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112225578A (en) * | 2020-11-13 | 2021-01-15 | 广州市怡森环保设备有限公司 | Honeycomb activated alumina product and preparation method thereof |
| CN112692961A (en) * | 2020-12-30 | 2021-04-23 | 中鸣(宁德)科技装备制造有限公司 | Beryllium oxide ceramic cold isostatic pressing forming process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4399052A (en) | Activated carbonaceous honeycomb body and production method thereof | |
| US3804647A (en) | Porous glass supports for automotive emissions control catalysts | |
| KR101679883B1 (en) | Method for making porous acicular mullite bodies | |
| CN110655389A (en) | Honeycomb ceramic with mesoporous nano alumina as matrix and preparation method thereof | |
| US4174971A (en) | Silicon carbide body containing a molybdenum disilicide alloy | |
| JPH0366373B2 (en) | ||
| CN104671826A (en) | Porous alumina ceramic, and preparation method and application thereof | |
| JP2010502547A (en) | Cordierite honeycomb body having high strength and substantially no microcrack and manufacturing method | |
| CN109836119B (en) | Temperature-sensitive ceramic with heat resistance and cold resistance functions and manufacturing method and application thereof | |
| JP2012504092A (en) | Method for producing porous SiC material | |
| WO2007142921A1 (en) | Cordierite formation | |
| EP3151942A1 (en) | Method and system for crack-free drying of high strength skin on a porous ceramic body | |
| CN108484210B (en) | Preparation method of silicon carbide porous ceramic with high porosity | |
| CN114605168A (en) | Preparation method of air filter material based on pansy porous ceramic and zeolite | |
| JP2651170B2 (en) | Ceramics porous body | |
| USH48H (en) | Method of making a ceramic article having open porous interior | |
| CN111874917A (en) | Aerogel with special shape and preparation method thereof | |
| CN111348889B (en) | Ceramic carrier for art porcelain, ceramic with formaldehyde adsorption function and application of ceramic | |
| CN106698451B (en) | A kind of synthetic method of DD3R molecular screen membranes | |
| CN112851394B (en) | Preparation method of porous silicon carbide ceramic | |
| JP2612878B2 (en) | Method for producing silicon carbide honeycomb structure | |
| RU2233700C2 (en) | Composition of charge for high-porous cellular- structure material for catalyst carriers | |
| US20100237524A1 (en) | Method of manufacturing ceramic capable of adsorbing fragrance and releasing fragrant aroma | |
| JPS58500284A (en) | Porous shaped body made of sintered glassy and/or crystalline material and method for producing such a porous shaped body | |
| CN110183232A (en) | A kind of pressure resistance foam ceramic material and its preparation method and application |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200107 |
|
| RJ01 | Rejection of invention patent application after publication |