CN105254323B - A kind of micropore corundum-mullite ceramics separation-membrane support and preparation method thereof - Google Patents
A kind of micropore corundum-mullite ceramics separation-membrane support and preparation method thereof Download PDFInfo
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- CN105254323B CN105254323B CN201510841078.0A CN201510841078A CN105254323B CN 105254323 B CN105254323 B CN 105254323B CN 201510841078 A CN201510841078 A CN 201510841078A CN 105254323 B CN105254323 B CN 105254323B
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Abstract
The invention discloses a kind of micropore corundum-mullite ceramics separation-membrane support and preparation method thereof, the supporter is prepared using injection forming technology and reaction in-situ sintering process, and raw material is made up of the component of following mass percent：52 ~ 80wt% of alumina raw material, 1 ~ 38wt% of alumina-silica raw material, 1 ~ 18wt% of binder materials, 0.05 ~ 10wt% of additive；Wherein the particle diameter of alumina raw material and alumina-silica raw material≤0.075mm.The mullite for being mainly characterized by in-situ preparation in the sample and playing combination and filling effect on a small quantity of this method, had both reduced the sintering temperature of product, and had improved the physical property of product again.Gained micropore corundum-mullite ceramics separation-membrane support has the advantages that low firing temperature, high mechanical strength, good penetrability, acidproof, alkaline-resisting, high temperature resistant, renewable are strong, and preparation cost is low, and technique is simple and easy to control, is adapted to popularization and application.
Description
Technical field
The invention belongs to technical field of ceramic material, and in particular to a kind of micropore corundum-mullite ceramic separation film support
Body, also relate to a kind of preparation method of micropore corundum-mullite ceramic separation film supporter.
Background technology
Since the 1980s, porous Ceramic Separation Membrane entered industrial applications field, its filter efficiency
High, alternative good, high temperature resistant, strong alkali-acid resistance and bioerosion ability are strong, high mechanical strength, long lifespan, easy cleaning, easily again
The advantages that raw and gradually accepted extensively by industrial quarters, and in the filtering of food and drink, biological medicine, water process and gas
It is used widely with the field such as separating.
Porous Ceramic Separation Membrane is considered as being superimposed upon porous ceramic support by tens nanometers to several microns thick film layers
On, supporter need to provide necessary support strength for film layer, and be fluid by providing passage, therefore supporter need to have machine
The advantages that tool intensity height, good penetrability, strong fluid-resistant and bioerosion ability, the quality of its performance directly affect the system of subsequent film
It is standby.In the prior art, the porous Ceramic Separation Membrane supporter of commercialization fired more using the higher special-alumina of purity and
Into, but the crystal formation of this aluminum oxide is mainly α-Al2O3, it is the high temperature state of aluminum oxide, and oxonium ion is in six side's compact reactors in structure
Product, aluminium ion are regularly filled in the space between oxonium ion, and each particle spacing is small, sound construction, is not easy to be destroyed, thus its
Lattice energy is larger, and reactivity is relatively low, and firing temperature is higher, and such as Japanese NGK company, its firing temperature is 1700 DEG C, and the U.S.
It is higher to prepare cost up to 1800 DEG C for its firing temperature of Pall companies.In order to reduce firing temperature, cost-effective, researcher
More the methods of aluminum oxide micro-nano ground rice is added using improvement grain composition or in aluminum oxide aggregate, these methods can make it
Firing temperature reduces, intensity improves, but also reduces the porosity and permeability of supporter simultaneously.
The research of Zhong Xiangchong academician et al. shows the mullite added in corundum material or in-situ preparation is appropriate, can be effective
Improve the properties of corundum material.Because corundum is generally granular, and mullite is mostly needle-like or column, works as corundum
When for principal crystalline phase, mullite is secondary crystalline phase, the mullite of needle-like or column is filled in the gap of corundum in granules, and mullite is brilliant
Body has played the toughened and reinforced effect of like fibrous；When mullite is principal crystalline phase and corundum is secondary crystalline phase, the filling of corundum crystal grain
In the gap of chain mullite network structure staggeredly, corundum crystal can play a part of particulate reinforcement reinforcement.The two states
The accumulation of densification and more close crystal combination are promoted, it is highly beneficial to the mechanical property of raising diphase ceramic material, both
The intensity of sample is improved, reduces its firing temperature again.Simultaneously as the generation of mullite is the process of volumetric expansion, can
The volume contraction that corundum in granules sintering belt comes effectively is reduced, improves the porosity and permeability of supporter.
The content of the invention
The purpose of the present invention is exactly that a kind of micropore corundum-mullite ceramic separation film branch is provided on the basis of the studies above
Support body, solves the problems such as existing porous alumina ceramic separation-membrane support firing temperature is high, mechanical strength is low, expensive.
Second object of the present invention is to provide a kind of preparation side of micropore corundum-mullite ceramic separation film supporter
Method.
The purpose of the present invention is realized by following technical measures：
The micropore corundum-mullite ceramic separation film supporter of the present invention includes the raw material components group of following percentage by weight
Into：52 ~ 80wt% alumina raw material, 1 ~ 38wt% alumina-silica raw material, 1 ~ 18wt% binder materials, 0.05 ~ 10wt% add
Add agent.
Heretofore described alumina raw material is α-Al2O3、β-Al2O3、γ-Al2O3, white fused alumina, commercial alumina, hydrogen
Mixture more than one or both of aluminum oxide or boehmite；Described alumina-silica raw material is kyanite, andalusite, silicon line
Mixture more than one or both of stone, gangue, bauxite or kaolin；Described binder materials is calcium aluminate water
Mud, white cement, ρ-Al2O3, alumina sol, alumina gel, silica sol, one in silica gel or aluminium Silica hydrogel
Kind or two or more mixtures；Described additive is sodium carbonate, sodium aluminate, aluminum sulfate, sodium tripolyphosphate, hexa metaphosphoric acid
Sodium, high-efficiency water-reducing agent of poly-carboxylic acid, silica, calcium oxide, zirconium oxide, magnesia, titanium oxide, carboxymethyl cellulose, acrylamide,
Mixture more than one or both of polyacrylamide or poly amic acid.Al in the aluminium hydroxide2O3Content is 64.5
~68wt%；Al in the commercial alumina2O3Content is 95 ~ 99.5wt%；Al in the white fused alumina2O3Content be 98 ~
99.9wt%；Al in the boehmite2O3Content is 65 ~ 87wt%；Al in the kyanite2O3Content is 40 ~ 61wt%；It is described red
Al in pillar2O3Content is 56 ~ 61wt%；Al in the sillimanite2O3Content is 53 ~ 61wt%；Al in the kaolin2O3Content
For 30 ~ 48wt%；Al in the bauxite2O3Content is 45 ~ 80wt%；Al in the gangue2O3Content is 15 ~ 41wt%.
Heretofore described alumina raw material and the particle diameter of alumina-silica raw material≤0.075mm.
The preparation method of micropore corundum-mullite ceramic separation film supporter of the present invention is as follows：
（a）52 ~ 80wt% alumina raw material, 1 ~ 38wt% alumina-silica raw material, 1 ~ 18wt% glue are taken by weight percentage
The additive of gel material and 0.05 ~ 10wt%, it is well mixed in agitator；
（b）In step（a）Compound in add above-mentioned raw materials percentage by weight sum 10 ~ 120wt% water, stirring
Uniform suspension slurry is made；
（c）By step（b）Slurry injection mould in, in room temperature environment stand 3 ~ 72h treat that its curing molding obtains base
Body；
（d）By step（c）It is put into after the obtained base substrate demoulding in 30 ~ 200 DEG C of drying box and dries 5 ~ 72h, is put again afterwards
Enter in sintering furnace and be warming up to 1400 ~ 1700 DEG C with 2 ~ 8 DEG C/min heating rate, and be incubated after 1 ~ 7h and obtain micropore corundum-not
Carry out feldspar separation-membrane support.
The step of the present invention（b）Middle amount of water is preferably step（a）20 ~ 80wt% of middle raw material percentage by weight sum；Step
Suddenly（c）In the time that is stored at room temperature be preferably 24 ~ 48h；Step（d）Described in drying temperature be preferably 50 ~ 110 DEG C, dry
Time is preferably 12 ~ 24h, and firing temperature is preferably 1500 ~ 1650 DEG C, and heating rate is preferably 3 ~ 5 DEG C/min, and soaking time is excellent
Elect 3 ~ 5h as.
The micropore corundum-mullite ceramic separation film supporter that the present invention develops uses injection forming technology and reaction in-situ
Sintering process is prepared, and raw material is formed by alumina raw material, alumina-silica raw material, binder materials and additive compound.The system of burning till
The crystalline phase of product is mainly corundum phase and mullite phase, and the pattern of wherein corundum phase is mostly sheet or graininess, and mullite phase
Pattern be mostly needle-like or column, corundum crystal and the mutually interspersed filling of mullite crystal so that the combination between crystal is more firm
Gu.Made supporter has low firing temperature, high mechanical strength, good penetrability, acidproof, alkaline-resisting, high temperature resistant, renewable strong
The advantages that, the physical and chemical index of product is superior to national standard, and raw material is that ceramic material industry often uses material, nontoxic cheap, work
Skill is simple and easy to control, is adapted to popularization and application.
The shape of made supporter can be tabular, column, tubulose or other complicated shapes；The apparent porosity of made supporter
For 10 ~ 70%, cold crushing strength is 10 ~ 450MPa, and average pore size is 0.5 ~ 35 μm, is 0.1 ~ 0.4MPa's in nitrogen pressure
Under the conditions of its nitrogen flux be 400 ~ 9870m3·m-2·h-1, its pure water flux is under conditions of hydraulic pressure is 0.1 ~ 0.3MPa
3.0~90m3·m-2·min-1 。
Beneficial effects of the present invention are as follows：
The preparation method of the micropore corundum-mullite ceramic separation film supporter of the present invention, is by alumina raw material, aluminium silicon
After matter raw material, binder materials and additive mixing plus slurry is made in water, is made into through injection molding, standing, the demoulding, drying and burning till
Product；The preparation method technique is simple and easy to control, cost is cheap, nontoxic pollution-free, green, has wide development space and should
Use prospect.
Embodiment
The present invention is described further below with reference to embodiment：
The particle diameter of alumina raw material and alumina-silica raw material described in following examples of the present invention≤0.075mm fine powders；
Described alumina raw material is α-Al2O3、β-Al2O3、γ-Al2O3, white fused alumina, commercial alumina, in aluminium hydroxide or boehmite
One or more kinds of mixtures；Described alumina-silica raw material is kyanite, andalusite, sillimanite, gangue, bauxite
Or mixture more than one or both of kaolin；Described binder materials is aluminous cement, white cement, ρ-Al2O3、
Mixing more than one or both of alumina sol, alumina gel, silica sol, silica gel or aluminium Silica hydrogel
Thing；Described additive be sodium carbonate, sodium aluminate, aluminum sulfate, sodium tripolyphosphate, calgon, high-efficiency water-reducing agent of poly-carboxylic acid,
Silica, calcium oxide, zirconium oxide, magnesia, titanium oxide, carboxymethyl cellulose, acrylamide, polyacrylamide or polyacrylic acid
Mixture more than one or both of amine；Al in the aluminium hydroxide2O3Content is 64.5 ~ 68wt%；The industrial oxidation
Al in aluminium2O3Content is 95 ~ 99.5wt%；Al in the white fused alumina2O3Content is 98 ~ 99.9wt%；Al in the boehmite2O3Contain
Measure as 65 ~ 87wt%；Al in the kyanite2O3Content is 40 ~ 61wt%；Al in the andalusite2O3Content is 56 ~ 61wt%；
Al in the sillimanite2O3Content is 53 ~ 61wt%；Al in the kaolin2O3Content is 30 ~ 48wt%；In the bauxite
Al2O3Content is 45 ~ 80wt%；Al in the gangue2O3Content is 15 ~ 41wt%.
Embodiment 1
Take by weight percentage：67wt% aluminium hydroxide fine powder（Al2O3Content is 65wt%）, 25wt% kyanite fine powder
（Al2O3Content is 50wt%）With 7wt% aluminous cement, 0.7wt% sodium carbonate and 0.3wt% carboxymethyl cellulose are original
Material, it is uniform in stirrer for mixing；The 60wt% of additional above-mentioned raw materials percentage by weight sum water again, stirring are made uniform
Suspension slurry；Slurry is injected in mould, standing 48h in room temperature environment treats that its curing molding obtains base substrate；Put after the base substrate demoulding
Enter and 24h is dried in 80 ~ 110 DEG C of electric drying oven with forced convection, dried sample is put into sintering furnace, with 3.5 DEG C/min liters
Temperature is to 1550 DEG C and is incubated 3h, produces micropore corundum-mullite ceramic separation film supporter.
After testing, the apparent porosity of micropore corundum-mullite ceramic separation film supporter obtained by the present embodiment be 55.1%,
Compressive resistance is 52.2MPa, average pore size is 6.2 μm, nitrogen flux 707m3·m-2·h-1（Nitrogen pressure is 0.1MPa）、
Pure water flux is 20.4m3·m-2·min-1（Hydraulic pressure is 0.1 MPa）.
Embodiment 2
Take by weight percentage：10wt% fused white corundum powder（Al2O3Content is 98.5wt%）, 60wt% industrial oxidation
Aluminium powder（Al2O3Content is 98wt%）, 14wt% kaolin powder（Al2O3Content is 38wt%）, 15wt% ρ-Al2O3With 1wt%'s
Sodium carbonate is raw material, uniform in stirrer for mixing；The 50wt% of additional above-mentioned raw materials percentage by weight sum water again, stirring
Uniform suspension slurry is made；Slurry is injected in mould, standing 48h in room temperature environment treats that its curing molding obtains base substrate；Base
It is put into after the body demoulding in 110 DEG C of electric drying oven with forced convection and dries 24h；Dried sample is put into sintering furnace, with 3 DEG C/
Min is warming up to 1600 DEG C and is incubated 3h, produces micropore corundum-mullite ceramic separation film supporter.
After testing, the apparent porosity of micropore corundum-mullite ceramic separation film supporter obtained by the present embodiment be 45.3%,
Compressive resistance is 87.8MPa, average pore size is 10.3 μm, nitrogen flux 728m3·m-2·h-1（Nitrogen pressure is 0.1MPa）、
Pure water flux is 25.4m3·m-2·min-1（Hydraulic pressure is 0.1MPa）.
Embodiment 3
Take by weight percentage：30wt% fused white corundum powder（Al2O3Content is 98.5wt%）, 44wt% industrial oxidation
Aluminium powder（Al2O3Content is 96wt%）, 5wt% α-Al2O3Micro mist（Al2O3Content is 98wt%, 2 μm of particle mean size）, 10wt%
Andalusite powder（Al2O3Content is 56wt%）, 10wt% silica sol, 0.5wt% acrylamide and 0.5wt% polypropylene
Acid amides is raw material, uniform in stirrer for mixing；The 60wt% of additional above-mentioned raw materials percentage by weight sum water again, stirring system
Into uniform suspension slurry；Slurry is injected in mould, standing 24h in room temperature environment treats that its curing molding obtains base substrate；Base substrate
It is put into after the demoulding in 110 DEG C of electric drying oven with forced convection and dries 48h；Dried sample is put into sintering furnace, with 4 DEG C/min
It is warming up to 1600 DEG C and is incubated 3h, produces micropore corundum-mullite ceramic separation film supporter.
After testing, the apparent porosity of micropore corundum-mullite ceramic separation film supporter obtained by the present embodiment be 46.7%,
Compressive resistance is 39.2MPa, average pore size is 11.5 μm, nitrogen flux 736m3·m-2·h-1（Nitrogen pressure is 0.1MPa）、
Pure water flux is 23.9m3·m-2·min-1（Hydraulic pressure is 0.1MPa）.
Embodiment 4
Take by weight percentage：55wt% aluminium hydroxide fine powder（Al2O3Content is 65wt%）, 22wt% sintering white fused alumina
Powder（Al2O3Content is 98wt%）, 15wt% aquamaine stone flour（Al2O3Content is 55wt%）, 7wt% white cement, 0.4wt% aluminium
The sodium tripolyphosphate of sour sodium, 0.3wt% Sodium Polyacrylate and 0.3wt% is raw material, uniform in stirrer for mixing；It is outer again to add
The 40wt% of raw material weight percentage sum water is stated, uniform suspension slurry is made in stirring；Slurry is injected in mould, in room
Warm environment, which stands 24h, makes its curing molding obtain base substrate；It is put into 110 DEG C of electric drying oven with forced convection and dries after the base substrate demoulding
24h；Dried sample is put into sintering furnace, 1650 DEG C is warming up to 3 DEG C/min and is incubated 3h, produces micropore corundum-not
Carry out feldspar separation-membrane support.
After testing, the apparent porosity of micropore corundum-mullite ceramic separation film supporter obtained by the present embodiment be 40.9%,
Compressive resistance is 131.8MPa, average pore size is 8.4 μm, nitrogen flux 366m3·m-2·h-1（Nitrogen pressure is 0.1MPa）、
Pure water flux is 17m3·m-2·min-1（Hydraulic pressure is 0.1MPa）.
Embodiment 5
Take by weight percentage：40wt% γ-Al2O3The white alundum powder of powder, 31wt%（Al2O3Content is 98wt%）、
15wt% bauxite（Al2O3Content is 80wt%）, 10wt% silica sol, 0.5wt% sodium carbonate, 3wt% magnesia
Poly amic acid with 0.5wt% is raw material, uniform in stirrer for mixing；Additional above-mentioned raw materials percentage by weight sum again
40wt% water, it is agitated that uniform suspension slurry is made；Slurry is injected in mould, standing 24h in room temperature environment treats its solidification
Shaping obtains base substrate；It is put into after the base substrate demoulding in 110 DEG C of electric drying oven with forced convection and dries 24h；Dried sample is put into
In sintering furnace, it is warming up to 1600 DEG C with 3 DEG C/min and is incubated 3h, produces micropore corundum-mullite ceramic separation film supporter.
After testing, the apparent porosity of micropore corundum-mullite ceramic separation film supporter obtained by the present embodiment be 20.2%,
Compressive resistance is 287.22MPa, and average pore size is 18.5 μm, nitrogen flux 575m3·m-2·h-1（Nitrogen pressure is
0.1MPa）, pure water flux 15.8m3·m-2·min-1（Hydraulic pressure is 0.1MPa）.
Embodiment 6
Take by weight percentage：67wt% α-Al2O3Micro mist（Al2O3Content is 99wt%, 3.3 μm of average grain diameter）、
20wt% sillimanite powder（Al2O3Content is 53wt%）, 10wt% aluminium Silica hydrogel powder and 3wt% titanium oxide be raw material, stirring
It is well mixed in machine；Uniform suspension slurry is made in the 45wt% of additional above-mentioned raw materials percentage by weight sum water again, stirring；
Slurry is injected in mould, standing 48h in room temperature environment treats that its curing molding obtains base substrate；110 DEG C are put into after the base substrate demoulding
24h is dried in electric drying oven with forced convection；Dried sample is put into sintering furnace, 1650 DEG C is warming up to 3 DEG C/min and protects
Warm 3h, produce micropore corundum-mullite ceramic separation film supporter.
After testing, the apparent porosity of micropore corundum-mullite ceramic separation film supporter obtained by the present embodiment be 27.2%,
Compressive resistance is 188.2MPa, average pore size is 17.5 μm, nitrogen flux 626m3·m-2·h-1（Nitrogen pressure is
0.1MPa）, pure water flux 26.4m3·m-2·min-1（Hydraulic pressure is 0.1MPa）.
Embodiment 7
Take by weight percentage：40wt% aluminium hydroxide fine powder（Al2O3Content is 65wt%）, 40wt% white alundum powder
（Al2O3Content is 98wt%）, 5wt% aquamaine stone flour（Al2O3Content is 55wt%）, 8wt% silica, 5wt% white cement,
The sodium tripolyphosphate of 1.5wt% sodium aluminate, 0.45wt% Sodium Polyacrylate and 0.05wt% is raw material, in stirrer for mixing
Uniformly；Uniform suspension slurry is made in the 50wt% of additional above-mentioned raw materials percentage by weight sum water again, stirring；Slurry is noted
Enter in mould, standing 24h in room temperature environment treats that its curing molding obtains base substrate；110 DEG C of electric heating air blast is put into after the base substrate demoulding
24h is dried in drying box；Dried sample is put into sintering furnace, 1650 DEG C is warming up to 3 DEG C/min and is incubated 3h, produce
Micropore corundum-mullite ceramic separation film supporter.
After testing, the apparent porosity of micropore corundum-mullite ceramic separation film supporter obtained by the present embodiment be 45.9%,
Compressive resistance is 111.8MPa, average pore size is 6.4 μm, nitrogen flux 334m3·m-2·h-1（Nitrogen pressure is 0.1MPa）、
Pure water flux is 14m3·m-2·min-1（Hydraulic pressure is 0.1MPa）.
Claims (8)
- A kind of 1. micropore corundum-mullite ceramic separation film supporter, it is characterised in that：It includes the original of following percentage by weight Expect component composition：52 ~ 80wt% alumina raw material, 1 ~ 38wt% alumina-silica raw material, 1 ~ 18wt% binder materials, 0.05 ~ 10wt% additive；Described additive is sodium carbonate, sodium aluminate, aluminum sulfate, sodium tripolyphosphate, calgon, polycarboxylic acids High efficiency water reducing agent, silica, calcium oxide, zirconium oxide, magnesia, titanium oxide, carboxymethyl cellulose, acrylamide, polyacrylamide Mixture more than one or both of amine or poly amic acid.
- 2. micropore corundum-mullite ceramic separation film supporter according to claim 1, it is characterised in that：Described oxygen Change aluminum feedstock is α-Al2O3、β-Al2O3、γ-Al2O3, white fused alumina, commercial alumina, aluminium hydroxide or one kind in boehmite or Two or more mixtures；Described alumina-silica raw material is kyanite, andalusite, sillimanite, gangue, bauxite or kaolin One or both of more than mixture；Described binder materials is aluminous cement, white cement, ρ-Al2O3, aluminum oxide it is molten Mixture more than one or both of glue, alumina gel, silica sol, silica gel or aluminium Silica hydrogel.
- 3. micropore corundum-mullite ceramic separation film supporter according to claim 2, it is characterised in that：The hydrogen-oxygen Change Al in aluminium2O3Content is 64.5 ~ 68wt%；Al in the commercial alumina2O3Content is 95 ~ 99.5wt%；In the white fused alumina Al2O3Content is 98 ~ 99.9wt%；Al in the boehmite2O3Content is 65 ~ 87wt%；Al in the kyanite2O3Content is 40 ~61wt%；Al in the andalusite2O3Content is 56 ~ 61wt%；Al in the sillimanite2O3Content is 53 ~ 61wt%；The height Al in the soil of ridge2O3Content is 30 ~ 48wt%；Al in the bauxite2O3Content is 45 ~ 80wt%；Al in the gangue2O3Content For 15 ~ 41wt%.
- 4. micropore corundum-mullite ceramic separation film supporter according to claim 1 or 2, it is characterised in that：Described The particle diameter of alumina raw material and alumina-silica raw material≤0.075mm.
- 5. a kind of preparation method suitable for micropore corundum-mullite ceramic separation film supporter described in claim 1, its feature It is：Methods described is realized using following step：（a）52 ~ 80wt% alumina raw material, 1 ~ 38wt% alumina-silica raw material, 1 ~ 18wt% gelling material are taken by weight percentage The additive of material and 0.05 ~ 10wt%, it is well mixed in agitator；（b）In step（a）Compound in add above-mentioned raw materials percentage by weight sum 10 ~ 120wt% water, stirring is made Uniform suspension slurry；（c）By step（b）Slurry injection mould in, in room temperature environment stand 3 ~ 72h treat that its curing molding obtains base substrate；（d）By step（c）It is put into after the obtained base substrate demoulding in 30 ~ 200 DEG C of drying box and dries 5 ~ 72h, places into burning afterwards 1400 ~ 1700 DEG C are warming up to 2 ~ 8 DEG C/min heating rate in freezing of a furnace, and micropore corundum-mullite is obtained after being incubated 1 ~ 7h Ceramic separation film supporter.
- 6. preparation method according to claim 5, it is characterised in that：Step（b）Middle amount of water is step（a）Middle raw material weight Measure 20 ~ 80wt% of percentage sum；Step（c）In the time that is stored at room temperature be 24 ~ 48h；Step（d）Described in dry temperature Spend for 50 ~ 110 DEG C, drying time is 12 ~ 24h, and firing temperature is 1500 ~ 1650 DEG C, and heating rate is 3 ~ 5 DEG C/min, insulation Time is 3 ~ 5h.
- 7. preparation method according to claim 5, it is characterised in that：The crystalline phase of made supporter is corundum phase and not come Shi Xiang, the wherein pattern of corundum phase are sheet or graininess, and the pattern of mullite phase is then needle-like or column；Made supporter Be shaped as tabular, column or tubulose.
- 8. preparation method according to claim 5, it is characterised in that：The apparent porosity of made supporter is 10 ~ 70%, often Warm compressive resistance is 10 ~ 450MPa, and stomata average pore size is 0.5 ~ 35 μm, under conditions of nitrogen pressure is 0.1 ~ 0.4MPa its Nitrogen flux is 400 ~ 9870m3·m-2·h-1, its pure water flux is 3.0 ~ 90m under conditions of hydraulic pressure is 0.1 ~ 0.3MPa3· m-2·min-1 。
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| CN114133270B (en) * | 2021-12-28 | 2023-04-07 | 攀枝花学院 | Hollow flat plate ceramic filter membrane and preparation method thereof |
| CN115259861B (en) * | 2022-06-08 | 2024-01-16 | 山东工业陶瓷研究设计院有限公司 | Porous ceramic membrane support with high porosity and preparation method thereof |
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