CN110229000A - A kind of high strength cordierite ceramic honeycomb body and preparation method thereof - Google Patents
A kind of high strength cordierite ceramic honeycomb body and preparation method thereof Download PDFInfo
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Abstract
This application discloses high strength cordierite ceramic honeycomb bodies and preparation method thereof, belong to filtration catalytic Material Field.The raw material of the preparation method of the cordierite ceramic honeycomb includes: feedstock composition, pore creating material, binder, lubricant, and the feedstock composition includes following components in parts by weight: 38-42 talcum, 5-15 kaolin, 4-8 calcined kaolin, 12-18 aluminium oxide, 12-18 aluminium hydroxide and 5-15 silica and；15~20 μm of talcum average grain diameter, 4~7 μm of kaolin average grain diameter, 2~3 μm of calcined kaolin average grain diameter, 3~5 μm of aluminium oxide average grain diameter, 5~8 μm of aluminium hydroxide average grain diameter and 3~5 μm of silica average grain diameter.The thermal expansion coefficient of the cordierite ceramic honeycomb is excellent, etc. isostatic pressing strengths are high, porosity is high, pore size distribution is narrow, aperture is few；Therefore filter efficiency of cordierite ceramic honeycomb when using as filter is high, back pressure is low, guarantees that it is not likely to produce defect in processes such as transport, catalyst coating, encapsulation, and higher in use process thermal shock resistance.
Description
Technical field
This application involves a kind of cordierite ceramic honeycombs and preparation method thereof, belong to filtration catalytic Material Field.
Background technique
Particulate filter is used to filter the fine particulates (PM) of gasoline and emission of diesel engine.Particular filter structure is by bee
Nest ontology and plug-hole part are constituted.The compartment at porous wall interval constitutes honeycomb body, plug-hole portion honeycomb body input end and
Outlet end forms " chess " formula and intersects.What the tail gas of engine discharge was carried by the input end of amplifier case, gas
Fine particulates are retained by sealing of hole portion, and gas passes through porous wall and enters adjacent compartments outflow.Honeycomb particulate filter is divided into vapour
Oil particles filter (GPF) and diesel particulate filter (DPF), the material maturation of honeycomb particulate filter are cordierite ceramic bee
Nest body.
Stringent limitation with emission regulation to PM and PN, in order to improve filter efficiency, reduce back pressure, it is desirable that particle filtering
The device porosity with higher, narrow pore size distribution, but the hole of traditional cordierite ceramic honeycomb is difficult to realize narrow pore size distribution, and
And sintering is be easy to cause to crack；And the porosity increases its equal isostatic pressing strength and is greatly reduced, in production process, Product transport, catalysis
It all may cause defect in agent coating and encapsulation process, it is serious to will cause cracking, lead to scrapping for product.
Summary of the invention
To solve the above-mentioned problems, a kind of cordierite ceramic honeycomb and preparation method thereof of high intensity, the party are provided
The porosity of the cordierite ceramic honeycomb of method preparation is high, pore size distribution is narrow, aperture is few, thermal expansion coefficient is excellent and waits isostatic pressing strengths
It is high；Therefore filter efficiency of cordierite ceramic honeycomb when using as filter is high, back pressure is low, guarantees it in transport, catalysis
The processes such as agent coating, encapsulation are not likely to produce defect, and higher in use process thermal shock resistance.
According to the one aspect of the application, a kind of preparation method of cordierite ceramic honeycomb is provided, this method includes
Following step: feedstock composition, pore creating material, binder, mix lubricant are formed into ceramics just mixed object, just by the ceramics after plasticising
Mixed object forms honeycomb biscuit body, honeycomb biscuit body is roasted, cordierite ceramic honeycomb is made；
Wherein, the feedstock composition includes following components in parts by weight: 38-42 talcum, 5-15 kaolin, 4-8 calcining
Kaolin, 12-18 aluminium oxide, 12-18 aluminium hydroxide and 5-15 silica, and；
15~20 μm of talcum average grain diameter, 4~7 μm of kaolin average grain diameter, 2~3 μm of calcined kaolin average grain diameter,
3~5 μm of aluminium oxide average grain diameter, 5~8 μm of aluminium hydroxide average grain diameter and 3~5 μm of silica average grain diameter.
Preferably, the feedstock composition includes following components in parts by weight: 38-42 talcum, 8-12 kaolin, 5-7 are forged
Burn kaolin, 13-17 aluminium oxide, 13-17 aluminium hydroxide and 8-12 silica.
It is highly preferred that the feedstock composition includes following components in parts by weight: 40 talcums, 10.8 kaolin, 6 calcinings
Kaolin, 15.2 aluminium oxide, 15.8 aluminium hydroxides and 12.2 silica.
Preferably, 16~19 μm of talcum average grain diameter, 6~7 μm of kaolin average grain diameter, calcined kaolin average grain diameter 2
~3 μm, 3~4 μm of aluminium oxide average grain diameter, 5~8 μm of aluminium hydroxide average grain diameter and 3~5 μm of silica average grain diameter.
Optionally, the weight ratio of the feedstock composition, pore creating material, binder and lubricant is 1:0.04-0.08:
0.07-0.13:0.015-0.025.Optionally, the weight ratio of the feedstock composition, binder, pore creating material and lubricant is 1:
0.05-0.07:0.08-0.12:0.017-0.023.Preferably, the feedstock composition, binder, pore creating material and lubricant
Weight ratio is 1:0.06:0.1:0.02.
Optionally, the raw material further includes water, the weight of the feedstock composition, binder, pore creating material, lubricant and water
Than for 1:0.04-0.08:0.07-0.13:0.015-0.025:0.25-0.40.Optionally, the feedstock composition, binder,
The weight ratio of pore creating material, lubricant and water is 1:0.05-0.07:0.08-0.12:0.017-0.023:0.28-0.37.It is preferred that
Ground, the feedstock composition, binder, pore creating material, lubricant and water weight ratio be 1:0.06:0.1:0.02:0.33.
Preferably, the preparation method of the cordierite ceramic honeycomb includes the following steps:
1) feedstock composition for forming cordierite is provided；
2) the mixed ceramics that formed of feedstock composition, pore creating material, binder, lubricant and water-wet are just mixed into object, ceramics is just mixed
Cordierite ceramic honeycomb is made in object after pugging, extrusion molding, microwave drying, plug-hole and sintering.
Optionally, the pore creating material includes the organic polymer particles that average grain diameter is 20-60 μm.
Optionally, the organic polymer particles are in polyphenylene sulfide, polyvinyl alcohol and polymethyl methacrylate
It is at least one.Preferably, the organic polymer particles are polyphenylene sulfide.
Optionally, the organic polymer particles are uniform solid spherical shape.
Optionally, the average grain diameter of the organic polymer particles is 30-50 μm.Preferably, the organic polymer
The average grain diameter of grain is 35-45 μm.It is highly preferred that the average grain diameter of the organic polymer particles is 40-50 μm.Most preferably
Ground, the average grain diameter of the organic polymer particles are 45 μm.
Optionally, the binder be selected from methylcellulose and/or hydroxypropyl methyl cellulose and；The lubricant is selected from
At least one of ready denier oil acid, salad oil and rapeseed oil.
Preferably, the binder is hydroxypropyl methyl cellulose, and the lubricant is ready denier oil acid.
Optionally, the condition of the sintering are as follows: 30 DEG C -480 DEG C of heating rate be 40-200 DEG C/h, 480 DEG C -600 DEG C
Heating rate 20 DEG C/h, 600 DEG C -1420 DEG C of heating rate is 60-175 DEG C/h, 1420 DEG C of holding 5.5-6.5h.
According to the another aspect of the application, a kind of cordierite ceramic honeycomb of any of the above-described method preparation is provided,
Preparing raw material includes: the feedstock composition for being used to form cordierite, pore creating material, binder and lubricant；Wherein, the pore creating material
The organic polymer particles for being 20-60 μm including average grain diameter；The overall porosity of the cordierite ceramic honeycomb is not less than
60%, pore-size distribution Df is less than 0.45.Optionally, the organic polymer particles are fluoropolymer resin.
Optionally, the organic polymer particles are in polyphenylene sulfide, polyvinyl alcohol and polymethyl methacrylate
It is at least one.Preferably, the organic polymer particles are polyphenylene sulfide.
Optionally, the organic polymer particles are uniform solid spherical shape.
Optionally, the average grain diameter of the organic polymer particles is 30-50 μm.Preferably, the organic polymer
The average grain diameter of grain is 35-45 μm.It is highly preferred that the average grain diameter of the organic polymer particles is 40-50 μm.Most preferably
Ground, the average grain diameter of the organic polymer particles are 45 μm.
Preferably, the porosity of the cordierite ceramic honeycomb is greater than 60%, and pore-size distribution Df is less than 0.42.More preferably
The porosity on ground, the cordierite ceramic honeycomb is not more than 70%.Most preferably, the hole of the cordierite ceramic honeycomb
Rate is not more than 65%.
Preferably, the pore-size distribution Df is less than 0.4.It is highly preferred that pore-size distribution Df is less than 0.39.
Optionally, aperture is less than D in the cordierite ceramic honeycomb5Hole account for the 5% of total pore space, wherein D5It is not less than
7μm.Preferably, the D5It is 7 μm -13 μm.Further, the D5It is 9 μm -13 μm.
Optionally, the average pore size of the cordierite ceramic honeycomb is 20-25 μm.Preferably, the cordierite ceramic
The average pore size of honeycomb ceramics is 21-24 μm.It is highly preferred that the average pore size of the cordierite ceramic honeycomb is 21.5-23.5 μ
m。
Optionally, the weight ratio of the feedstock composition, pore creating material, binder and lubricant is 1:0.04-0.08:
0.07-0.15:0.015-0.025.Optionally, the weight ratio of the feedstock composition, binder, pore creating material and lubricant is 1:
0.05-0.07:0.08-0.12:0.017-0.023.Preferably, the feedstock composition, binder, pore creating material and lubricant
Weight ratio is 1:0.06:0.1:0.02.
Optionally, the raw material further includes water, the weight of the feedstock composition, binder, pore creating material, lubricant and water
Than for 1:0.04-0.08:0.07-0.13:0.015-0.025:0.25-0.40.Optionally, the feedstock composition, binder,
The weight ratio of pore creating material, lubricant and water is 1:0.05-0.07:0.08-0.12:0.017-0.023:0.28-0.37.It is preferred that
Ground, the feedstock composition, binder, pore creating material, lubricant and water weight ratio be 1:0.06:0.1:0.02:0.33.
Optionally, the feedstock composition includes following components in parts by weight: 38-42 talcum, 5-15 kaolin, 4-8 are forged
Kaolin, 12-18 aluminium oxide, 12-18 aluminium hydroxide and 5-15 silica are burnt, and；
15~20 μm of talcum average grain diameter, 4~7 μm of kaolin average grain diameter, 2~3 μm of calcined kaolin average grain diameter,
3~5 μm of aluminium oxide average grain diameter, 5~8 μm of aluminium hydroxide average grain diameter and 3~5 μm of silica average grain diameter.
Preferably, the feedstock composition includes following components in parts by weight: 38-42 talcum, 8-12 kaolin, 5-7 are forged
Burn kaolin, 13-17 aluminium oxide, 13-17 aluminium hydroxide and 8-12 silica.
It is highly preferred that the feedstock composition includes following components in parts by weight: 40 talcums, 10.8 kaolin, 6 calcinings
Kaolin, 15.2 aluminium oxide, 15.8 aluminium hydroxides and 12.2 silica.
Preferably, 16~19 μm of talcum average grain diameter, 6~7 μm of kaolin average grain diameter, calcined kaolin average grain diameter 2
~3 μm, 3~4 μm of aluminium oxide average grain diameter, 5~8 μm of aluminium hydroxide average grain diameter and 3~5 μm of silica average grain diameter.
Optionally, the binder be selected from methylcellulose and/or hydroxypropyl methyl cellulose and；The lubricant is selected from
At least one of ready denier oil acid, salad oil and rapeseed oil.
Preferably, the binder is hydroxypropyl methyl cellulose, and the lubricant is ready denier oil acid.
In the application, the pore-size distribution Df=(D50-D10)/D50, wherein D50And D10Indicate aperture value, D50> D10；
D50Indicate the aperture for meeting the following conditions: aperture is less than D50Hole account for the 50% of total pore space；D10Expression meets the following conditions
Aperture: aperture is less than D10Hole account for the 10% of total pore space.
In the application, the cordierite ceramic honeycomb includes material or the shaped article made of the material, example
Such as plug-hole or the not wall-flow honeycomb filter of plug-hole, such as GPF or DPF.
The beneficial effect of the application includes but is not limited to:
1, according to the cordierite ceramic honeycomb of the application, there is high porosity, pore size distribution is narrow, and aperture is less, has
Conducive to raising filter efficiency, reduce back pressure.
2, according to the cordierite ceramic honeycomb of the application, have thermal expansion coefficient excellent and wait isostatic pressing strengths high, therefore should
Cordierite ceramic honeycomb is not likely to produce defect in processes such as transport, catalyst coating, encapsulation, and in the heat-resisting punching of use process
Hitting property is higher.
3, the pore creating material according to used in the preparation method of the cordierite ceramic honeycomb of the application and other raw materials are matched
It closes and uses so that the qualification rate for being burnt into product is high, sintering cracking is low.
Specific embodiment
The application is described in detail below with reference to embodiment, but the application is not limited to these embodiments.
Unless otherwise instructed, the raw material in embodiments herein and catalyst are bought by commercial sources, wherein poly-
The purity of diphenyl sulfide is 99%, the purity of polyvinyl alcohol is 99% and the purity of polymethyl methacrylate is 99%.
Analysis method is as follows in embodiments herein:
Using Mike Mo Ruitike Instrument Ltd. AutoPore IV 95XX model mercury injection apparatus carry out porosity,
The test of average pore size, hole component, pore size distribution index D f.Test method are as follows: evaluation object is cut into 11 × 11 × 18.5mm
Cuboid, evaluation object is placed in mercury injection apparatus and is tested.
It is sintered the evaluation method that whether cracks are as follows: the cordierite ceramic honeycomb before sintering is placed in shuttle kiln and is burnt
Knot, determines whether to be sintered cracking with light leakage detector after sintering.
Equal isostatic pressing strengths are carried out using Stainless steel pressure vessels to test.Equal isostatic pressing strengths analysis method includes: 1. will evaluation
Object is inserted in hollow cylindrical rubber set, and evaluation object is by rubber sleeve tight, rubber sleeve both ends cover plate for sealing；2. will be with
Upper entirety is put into using water as in the container of medium, the closed container；3. pressurizeing to the closed container, a certain setting is reached
When pressure, 5min is kept the temperature if hearing sound in 5min and illustrates that evaluation object can not be by the setting pressure；If
Sound is not heard in 5min, then illustrates that evaluation object can be by the setting pressure.
Thermal expansion coefficient evaluation: it firstly, the cuboid that object cutting is 5 × 5 × 50mm will be evaluated, then places it in
25-800 DEG C of thermal expansion coefficient is tested in thermal dilatometer.Thermal expansion coefficient, i.e., the material of unit length is in a certain temperature range
Every average elongation amount for increasing one degree temperature.
According to a kind of embodiment of the application, the preparation method of cordierite ceramic honeycomb includes the following steps:
1) mix: feedstock composition, pore creating material, the binder prepared carries out dry-mixed in colter mixer, is then sprayed into
The mixing liquid of lubricant and water carries out wet mixing；
2) pugging: just mixed object was transported to the progress pugging of net pug mill to the ceramics after wet mixing；
3) extrusion molding: pugging be pug after be delivered to single screw extrusion machine, double screw extruder or descaling extrusion press
It is formed, pug becomes columned wet base by mold；
4) microwave drying: after the cutting of wet base cutting machine, ceramic honey comb cylindrical body becomes through microwave dryer dryness finalization
Biscuit；
5) biscuit is cut off: biscuit is cut into certain height by biscuit cutting machine；
6) plug-hole: the biscuit end face after cutting carries out overlay film, carries out alternately plug-hole through plug-hole machine after laser-beam drilling machine punching；
7) be sintered: the biscuit after plug-hole is sintered through shuttle kiln or tunnel oven.The condition of sintering are as follows: 30-480 DEG C
Heating rate is 40-200 DEG C/h, and 480 DEG C -600 DEG C of 20 DEG C/h of heating rate, 600 DEG C -1420 DEG C of heating rate is 60-
175 DEG C/h, 1420 DEG C of holding 5.5-6.5h.
The preparation of 1 cordierite ceramic honeycomb 1# of embodiment
Can be fired into the feedstock composition 1#:40wt% of cordierite honeycomb ceramic 16~19 μm of talcums of average grain diameter,
6~7 μm of kaolin of average grain diameter of 10.8wt%, the calcined kaolin of 6% 2~3 μm of average grain diameters, 15.2wt% are averaged
3~5 μm of the average grain diameter oxidations of 3~4 μm of aluminium oxide of partial size, 5~8 μm of aluminium hydroxides of 15.8wt% average grain diameter and 12.2wt%
Silicon.
The preparation of cordierite ceramic honeycomb 1#: by 100Kg feedstock composition 1#, 6Kg hydroxypropyl methyl cellulose, 10Kg
Polyphenylene sulfide, 2Kg ready denier oil acid and 33Kg water mixed in colter, mixed ceramics just mixed object by mediating or practicing
Pug is made in mud.Pug is delivered to double screw extruder or descaling extrusion press forms, pug becomes circle by mold
Columnar wet base.After wet base cutting operation, ceramic honey comb cylindrical body becomes biscuit using microwave dryer dryness finalization.Biscuit is logical
It crosses cutter and is cut into certain height, be then sintered obtained cordierite ceramic honeycomb 1#.
The preparation and performance of embodiment 2 cordierite ceramic honeycomb 2#-8# and comparative cordierite ceramic honeycomb body D1#-D9#
Test
According to the preparation method of the cordierite ceramic honeycomb 1# of embodiment 1 prepare cordierite ceramic honeycomb 2#-8# and
Comparative cordierite ceramic honeycomb body D1#-D9#, the preparation method with cordierite ceramic honeycomb 1# is the difference is that table 1.
It is to the cordierite ceramic honeycomb 1#-8# of preparation, the hole of comparative cordierite ceramic honeycomb body D1#-D9# and sintering
No cracking progress overall merit, 60%≤porosity≤65%, 20 μm≤average pore size≤24 μm, Df≤0.45, D5 >=7 μm,
It is sintered indehiscent cordierite ceramic honeycomb and is evaluated as " qualification ", do not meet being considered as any two above evaluation criterion one
" unqualified ", wherein D5Corresponding pore volume accounts for the corresponding aperture of total volume 5%, and evaluation result is as shown in table 1.
Table 1
Walnut powder, peameal, mealy potato purity be greater than 95%, foam microspheres are a kind of small sphere plastic particle,
The gas composition being wrapped in by a kind of polymeric shells with it, polymeric shells material are polyvinyl chloride ball or polymethylacrylic acid
Methyl esters ball.
As shown in Table 1, the polyphenylene sulfide that the spherical average grain diameter of raw material components cooperation of the application is 45 μm is as pore creating material
The porosity of the cordierite ceramic honeycomb 1# of preparation is maximum, pore-size distribution is narrow, small-bore content is low and sintering is not easy to crack, comments
Valence result is qualification.And respectively using rectangular polyphenylene sulfide, the pure and mild spherical polymethyl methacrylate of spherical polyethylene as pore-creating
The porosity of cordierite ceramic honeycomb 4#-6#, pore-size distribution made from agent be narrow and the performance of small-bore content is lower than cordierite
Ceramic honeycomb body 1#, but its evaluation result is qualification.And from cordierite ceramic honeycomb 1#-4#, cordierite ceramic honeycomb
7#-8# can be seen that the average grain diameter of pore creating material and additive amount have a very big impact honeycomb ceramics obtained, and by a large amount of
The preparation method of exploration the application be made that porosity is maximum, pore-size distribution is narrow, small-bore content is low and sintering is not easy to crack
Cordierite ceramic honeycomb.The test result of comparative cordierite ceramic honeycomb body D1#-D9# be it is unqualified, with walnut powder quality
The promotion of percentage, the porosity, average pore size, D5 increase, but are sintered cracking risk and increase, and porosity, average pore size, D5
It is lower, DfIt is larger, therefore overall merit is caused to be unqualified.Pore creating material or addition walnut powder, pea are not added during preparation
Bean powder, mealy potato, mealy potato foam microspheres, comparative cordierite ceramic honeycomb body D1#-D9# made from graphite microballoon are neither
The requirement of the application can be reached.
The preparation of embodiment 3 cordierite ceramic honeycomb 10#-13# and comparative cordierite ceramic honeycomb body D10#-D12#
And performance test
Cordierite ceramic honeycomb 10#-13# is prepared according to the preparation method of the cordierite ceramic honeycomb 1# of embodiment 1
With comparative cordierite ceramic honeycomb body D10#-D12#, with the preparation method of cordierite ceramic honeycomb 1# the difference is that
Table 2.
To the cordierite ceramic honeycomb 9#-13# of preparation, comparative cordierite ceramic honeycomb body D10#-D12# etc. static pressure
Intensity and thermal expansion coefficient are evaluated, isostatic pressing strengths (abbreviation the ISO) >=1.2Mpa such as definition, thermal expansion coefficient (abbreviation CTE)
≤6×10-7Diesel particulate filter device be evaluated as " qualification ", do not meet being considered as " no for any two above evaluation criterion one
It is qualified ".
Table 2
The equal isostatic pressing strengths of cordierite ceramic honeycomb 9#-13# known to table 2, thermal expansion coefficient overall merit are " qualification ".
The isostatic pressing strengths such as siliconoxide mass percentage influence, silica in comparative cordierite ceramic honeycomb body D10#-D11# inorganic compounding
Mass percent is small, waits isostatic pressing strengths lower than 1.2Mpa, it is unqualified for leading to overall merit.Comparative cordierite ceramic honeycomb body
Siliconoxide mass percentage influences thermal expansion coefficient in D12# formula, and siliconoxide mass percentage is excessively high, and thermal expansion coefficient >=6 ×
10-7, it is unqualified for leading to overall merit.Although increasing siliconoxide mass percentage in inorganic compounding the static pressures such as can increase
Degree, but thermal expansion coefficient will increase simultaneously；With the increase of siliconoxide mass percentage in inorganic compounding, isostatic pressing strengths is waited to increase
Greatly, but with siliconoxide mass percentage increase to it is a certain amount of, wait isostatic pressing strengths increase tendency reduce.
The preparation and performance test of 4 cordierite ceramic honeycomb 14# of embodiment
Cordierite ceramic honeycomb 14#, preparation with cordierite ceramic honeycomb 1# do not have to place and are using can burn
Be made 15~20 μm of talcums of average grain diameter of the feedstock composition 14#:38wt% of cordierite honeycomb ceramic, 10.8wt% it is flat
3~5 μm of oxygen of average grain diameter of 4~7 μm of kaolin of partial size, the calcined kaolin of 6% 2~3 μm of average grain diameters, 15.2wt%
Change 3~5 μm of silica of average grain diameter of aluminium, 5~8 μm of aluminium hydroxides of 15.8wt% average grain diameter and 12.2wt%.Cordierite pottery
The porosity 63.18% of porcelain honeycomb ceramics 14#, 21.61 μm of average pore size, pore-size distribution Df0.39, small-bore D511.0, sintering is not
Easy to crack, evaluation result is qualification.
The preparation of 5 cordierite ceramic honeycomb 15# of embodiment
Can be fired into the feedstock composition 15#:42wt% of cordierite honeycomb ceramic 16~19 μm of talcums of average grain diameter,
The average grain diameter of 6~7 μm of kaolin of average grain diameter of 15wt%, the calcined kaolin of 6% 2~3 μm of average grain diameters, 18wt%
3~5 μm of silica of average grain diameter of 3~4 μm of aluminium oxide, 5~8 μm of aluminium hydroxides of 15wt% average grain diameter and 11wt%.
The preparation of 6 cordierite ceramic honeycomb 16# of embodiment
Can be fired into the feedstock composition 16#:40wt% of cordierite honeycomb ceramic 16~19 μm of talcums of average grain diameter,
The average grain diameter of 6~7 μm of kaolin of average grain diameter of 5wt%, the calcined kaolin of 8% 2~3 μm of average grain diameters, 12wt%
3~5 μm of silica of average grain diameter of 3~4 μm of aluminium oxide, 5~8 μm of aluminium hydroxides of 12wt% average grain diameter and 13wt%.
The preparation of 7 cordierite ceramic honeycomb 17# of embodiment
The preparation of cordierite ceramic honeycomb 17#: by 100Kg feedstock composition 1#, 4Kg hydroxypropyl methyl cellulose, 7Kg
Polyphenylene sulfide, 1.5Kg ready denier oil acid and 33Kg water mixed in colter.
The preparation of 8 cordierite ceramic honeycomb 18# of embodiment
The preparation of cordierite ceramic honeycomb 18#: by 100Kg feedstock composition 1#, 8Kg hydroxypropyl methyl cellulose,
Polyphenylene sulfide, 2.5Kg ready denier oil acid and the 33Kg water of 13Kg mixes in colter.
The performance test of 9 cordierite ceramic honeycomb 15#-18# of embodiment
Whether hole and sintering to the cordierite ceramic honeycomb 15#-18# of preparation crack and carry out overall merit, 60%≤
Porosity≤65%, 20 μm≤average pore size≤24 μm, Df≤0.45, D5 >=7 μm are sintered indehiscent automobile-used particulate filter
It is evaluated as " qualification ", do not meet any two above evaluation criterion one is considered as " unqualified ", wherein D5Corresponding pore volume accounts for
The corresponding aperture of total volume 5%, evaluation result are as shown in table 3.
Table 3
As shown in Table 3, change cordierite ceramic honeycomb of the component for preparing raw material to preparation of cordierite ceramic honeycomb
The influence of the performance of body, the raw material components of the application cooperate the polyphenylene sulfide that spherical average grain diameter is 45 μm to prepare as pore creating material
Cordierite ceramic honeycomb 1# porosity it is maximum, pore-size distribution is narrow, small-bore content is low and sintering is not easy to crack, evaluation knot
Fruit is qualification.
The above, only embodiments herein, the protection scope of the application is not by these specific embodiments
Limitation, but determined by following claims.To those skilled in the art, the application can have various
Change and variation.All any modification, equivalent replacement, improvement and so within the technical idea and principle of the application, should all
Comprising within the scope of protection of this application.
Claims (10)
1. a kind of preparation method of cordierite ceramic honeycomb, which is characterized in that this method includes the following steps: material combination
Object, pore creating material, binder, mix lubricant form ceramics just mixed object, and by the ceramics after plasticising, just mixed object forms honeycomb biscuit body,
Honeycomb biscuit body is roasted, cordierite ceramic honeycomb is made；
Wherein, the feedstock composition includes following components in parts by weight: 38-42 talcum, 5-15 kaolin, 4-8 calcine kaolinite
Soil, 12-18 aluminium oxide, 12-18 aluminium hydroxide and 5-15 silica, and；
15~20 μm of the talcum average grain diameter, 4~7 μm of kaolin average grain diameter, 2~3 μm of calcined kaolin average grain diameter, oxygen
3~5 μm of aluminium average grain diameter of change, 5~8 μm of aluminium hydroxide average grain diameter and 3~5 μm of silica average grain diameter.
2. preparation method according to claim 1, which is characterized in that the feedstock composition includes the group of following weight parts
Point: 40 talcums, 10.8 kaolin, 6 calcined kaolins, 15.2 aluminium oxide, 15.8 aluminium hydroxides and 12.2 silica, and；
16~19 μm of the talcum average grain diameter, 5~7 μm of kaolin average grain diameter, 2~3 μm of calcined kaolin average grain diameter, oxygen
3~4 μm of aluminium average grain diameter of change, 5~8 μm of aluminium hydroxide average grain diameter and 3~5 μm of silica average grain diameter.
3. preparation method according to claim 1, which is characterized in that the feedstock composition, binder, pore creating material and profit
The weight ratio of lubrication prescription is 1:0.04-0.08:0.07-0.15:0.015-0.025；
Preferably, the weight ratio of the feedstock composition, binder, pore creating material and lubricant is 1:0.06:0.1:0.02.
4. preparation method according to claim 1, which is characterized in that the pore creating material includes that average grain diameter is 20-60 μm
Organic polymer particles.
5. the preparation method according to claim 4, which is characterized in that the organic polymer particles be selected from polyphenylene sulfide,
At least one of polyvinyl alcohol and polymethyl methacrylate；
Preferably, the organic polymer particles are polyphenylene sulfide.
6. the preparation method according to claim 4, which is characterized in that the organic polymer particles are uniform medicine ball
Shape.
7. the preparation method according to claim 4, which is characterized in that the average grain diameter of the organic polymer particles is
30-50μm；
Preferably, the average grain diameter of the organic polymer particles is 35-45 μm.
8. preparation method according to claim 1, which is characterized in that the binder is selected from methylcellulose and/or hydroxyl
Propyl methocel and；
The lubricant is selected from least one of ready denier oil acid, salad oil and rapeseed oil；
Preferably, the binder is hydroxypropyl methyl cellulose, and the lubricant is ready denier oil acid.
9. a kind of cordierite ceramic honeycomb as made from preparation method of any of claims 1-8, feature
It is, the overall porosity of the cordierite ceramic honeycomb is not less than 60%, and pore-size distribution Df is less than 0.45.
10. cordierite ceramic honeycomb according to claim 9, aperture is less than D in the cordierite ceramic honeycomb5's
Hole accounts for the 5% of total pore space, wherein D5Not less than 7 μm；
Preferably, the D5It is 7 μm -13 μm.
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| CN108083840A (en) * | 2017-12-18 | 2018-05-29 | 中国平煤神马集团开封炭素有限公司 | A kind of water process ceramic honey comb and preparation method thereof |
| CN110841480A (en) * | 2019-10-18 | 2020-02-28 | 浙江达峰汽车技术有限公司 | Method for reducing pressure drop of catalyst coating in particle filter |
| CN111393155A (en) * | 2020-01-10 | 2020-07-10 | 重庆奥福精细陶瓷有限公司 | Thin-wall large-aperture cordierite honeycomb ceramic carrier and preparation method thereof |
| CN113786689A (en) * | 2021-09-22 | 2021-12-14 | 重庆奥福精细陶瓷有限公司 | Narrow micropore distribution cordierite honeycomb ceramic filter and preparation method and application thereof |
| CN113912411A (en) * | 2021-09-22 | 2022-01-11 | 云南菲尔特环保科技股份有限公司 | Cordierite thermal shock-resistant thin-wall catalyst carrier and preparation method thereof |
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| CN115043667A (en) * | 2022-07-12 | 2022-09-13 | 江苏省宜兴非金属化工机械厂有限公司 | Preparation method of cordierite honeycomb ceramic carrier with porosity of more than 60 percent |
| CN115231913A (en) * | 2022-07-07 | 2022-10-25 | 宜兴王子制陶有限公司 | Wall-flow honeycomb ceramic filter with adjustable porosity and preparation process thereof |
| CN116023126A (en) * | 2023-02-17 | 2023-04-28 | 山东奥福环保科技股份有限公司 | High-porosity and large-aperture honeycomb ceramic carrier and preparation method thereof |
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| CN113912415A (en) * | 2021-10-29 | 2022-01-11 | 台山市合能陶瓷有限公司 | Porous medium infrared burner material and preparation method and application thereof |
| CN115231913A (en) * | 2022-07-07 | 2022-10-25 | 宜兴王子制陶有限公司 | Wall-flow honeycomb ceramic filter with adjustable porosity and preparation process thereof |
| CN115043667A (en) * | 2022-07-12 | 2022-09-13 | 江苏省宜兴非金属化工机械厂有限公司 | Preparation method of cordierite honeycomb ceramic carrier with porosity of more than 60 percent |
| CN116023126A (en) * | 2023-02-17 | 2023-04-28 | 山东奥福环保科技股份有限公司 | High-porosity and large-aperture honeycomb ceramic carrier and preparation method thereof |
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