CN113979780A - Porous zirconia ceramic and preparation method thereof - Google Patents
Porous zirconia ceramic and preparation method thereof Download PDFInfo
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- CN113979780A CN113979780A CN202111318936.5A CN202111318936A CN113979780A CN 113979780 A CN113979780 A CN 113979780A CN 202111318936 A CN202111318936 A CN 202111318936A CN 113979780 A CN113979780 A CN 113979780A
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- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 title claims abstract description 120
- 239000000919 ceramic Substances 0.000 title claims abstract description 72
- 238000002360 preparation method Methods 0.000 title abstract description 15
- 239000004088 foaming agent Substances 0.000 claims abstract description 27
- 235000021120 animal protein Nutrition 0.000 claims abstract description 19
- 239000000843 powder Substances 0.000 claims abstract description 18
- 239000006260 foam Substances 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 239000003381 stabilizer Substances 0.000 claims abstract description 8
- 239000002270 dispersing agent Substances 0.000 claims abstract description 6
- 239000011230 binding agent Substances 0.000 claims abstract description 4
- 229910002076 stabilized zirconia Inorganic materials 0.000 claims abstract description 3
- 239000002002 slurry Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 18
- -1 polytetrafluoroethylene Polymers 0.000 claims description 15
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 15
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 15
- 235000015895 biscuits Nutrition 0.000 claims description 14
- 238000005245 sintering Methods 0.000 claims description 12
- 238000005187 foaming Methods 0.000 claims description 11
- 229920002873 Polyethylenimine Polymers 0.000 claims description 10
- 238000001723 curing Methods 0.000 claims description 10
- 238000000227 grinding Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- 239000002699 waste material Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 8
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 8
- 239000002202 Polyethylene glycol Substances 0.000 claims description 7
- 239000007864 aqueous solution Substances 0.000 claims description 7
- 239000000839 emulsion Substances 0.000 claims description 7
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 7
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 7
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 7
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical group OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000010705 motor oil Substances 0.000 claims description 7
- 239000012188 paraffin wax Substances 0.000 claims description 7
- 229920001223 polyethylene glycol Polymers 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 229920002401 polyacrylamide Polymers 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims description 2
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims description 2
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims description 2
- 239000005642 Oleic acid Substances 0.000 claims description 2
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims description 2
- 239000002283 diesel fuel Substances 0.000 claims description 2
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims description 2
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 2
- 239000011148 porous material Substances 0.000 abstract description 12
- 238000009776 industrial production Methods 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 10
- 238000001035 drying Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 4
- 238000010998 test method Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 229910010293 ceramic material Inorganic materials 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000001273 butane Substances 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003999 initiator Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 2
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 235000018102 proteins Nutrition 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 239000002341 toxic gas Substances 0.000 description 2
- 229910001928 zirconium oxide Inorganic materials 0.000 description 2
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012620 biological material Substances 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 238000007780 powder milling Methods 0.000 description 1
- 239000012460 protein solution Substances 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
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- 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
- C04B35/48—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 zirconium or hafnium oxides, zirconates, zircon or hafnates
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
- C04B35/634—Polymers
- C04B35/63404—Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B35/63444—Nitrogen-containing polymers, e.g. polyacrylamides, polyacrylonitriles, polyvinylpyrrolidone [PVP], polyethylenimine [PEI]
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- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
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- C04B35/63448—Polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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Abstract
The invention belongs to the technical field of porous zirconia ceramics, and particularly relates to a porous zirconia ceramic and a preparation method thereof. The porous zirconia ceramic is prepared from the following raw materials in percentage by weight: 85-92% of yttrium-stabilized zirconia powder, 1-2% of binder, 1-3% of dispersant, 5-10% of foaming agent and 0.01-0.02% of foam stabilizer; the foaming agent is animal protein foaming agent. The porous zirconia ceramic adopts pure natural animal protein as a foaming agent, has low cost and uniform pores, and is easy for industrial production; the invention also provides a simple and feasible preparation method.
Description
Technical Field
The invention belongs to the technical field of porous zirconia ceramics, and particularly relates to a porous zirconia ceramic and a preparation method thereof.
Background
With the development of technological progress, zirconia ceramics play a very important role in the present society, especially in light structural materials and biomaterials. As a new technology, the zirconia porous ceramic has the advantages of low density, low thermal conductivity, good thermal shock resistance, chemical corrosion resistance and the like, and is widely applied to the aspects of manufacturing filters, separating devices, mixing elements and the like.
At present, the method for preparing the zirconia porous ceramic comprises a pore-forming agent method, a foaming method, a foam impregnation method, a pore gradient preparation method and the like, and the pore-forming agent method and the foaming method are most widely applied. The traditional foaming method not only increases the complexity of the process and is difficult to control air holes due to the incorporation of various chemical reagents, but also easily generates toxic gas when volatilizing, pollutes the environment and harms the health of people.
Patent CN108467281B discloses a preparation method of zirconia porous ceramic, comprising the following steps: putting zirconia powder and carbon fiber into a container, adding a proper amount of water, stirring and mixing, adding a foaming agent and a foam stabilizer in the stirring process until bubbling is uniform, and then adding a binder to obtain a mixed material; pouring the mixed material into a forming die, and naturally airing and forming to obtain a green body; putting the green body into a closed box, vacuumizing, then filling butane and oxygen to normal pressure, standing, igniting by electronic fire after 1.5-3 hours to enable the butane to burn, and obtaining a perforated green body after the burning is finished; and sintering the blank with the opening at high temperature to obtain the zirconia porous ceramic. The carbon fiber is added to improve the toughness and strength of the ceramic, and meanwhile, the anionic surfactant is used as a foaming agent and a foam stabilizer is introduced, so that the tapping operation is complex and the pores are difficult to control.
Patent CN109133980A provides a method for preparing zirconia porous ceramic by foam casting method, which comprises preparing a premixed solution from deionized water, acrylamide, N' -methylene bisacrylamide and ammonium polyacrylate in proportion, mixing with zirconia raw material powder, and ball-milling to obtain slurry; adding a foaming agent, a catalyst and an initiator into the slurry, quickly stirring, injecting into a mold for curing and molding, and demolding after curing to obtain a porous ceramic blank; and drying and sintering to obtain the zirconia porous ceramic. The porous ceramic blank obtained by adopting the foam injection-coagulation method has uniform pore distribution and structure and higher strength, but chemical reagents such as an initiator, a catalyst and the like are also required to be added, so that toxic gas is easily generated, the environment is polluted, and the health of people is harmed.
Disclosure of Invention
The technical problem solved by the invention is as follows: the porous zirconia ceramic is provided, adopts pure natural animal protein as a foaming agent, has low cost and uniform pores, and is easy for industrial production; the invention also provides a simple and feasible preparation method.
The porous zirconia ceramic is prepared from the following raw materials in percentage by weight:
the zirconia powder is preferably yttrium-stabilized zirconia with the particle size of 0.4-0.5 μm.
The dispersant is polyethyleneimine or polyacrylamide.
The binder is polyethylene glycol or polyvinyl alcohol, preferably polyethylene glycol with the molecular weight of 600.
The foaming agent is an animal protein foaming agent.
The foam stabilizer is hydroxypropyl methyl cellulose, oleic acid or paraffin emulsion.
The invention adopts the dispersing agent to reduce the surface tension and improve the compatibility of the adhesive and the powder, the foam stabilizer aims to control the time of foam rupture and obtain pores with uniform pore size and compact arrangement, the preparation process is environment-friendly and pollution-free, and the adhesive ensures the shape integrity of the blank. The addition components interact with each other, so that the fluidity and the integrity of the slurry are ensured, and the dosage of each component is increased or reduced to generate adverse effects on later-stage forming and sintering.
The animal protein belongs to natural foaming agent, has interfacial activity and surface tension, when used in ceramic material, air can be stirred into the animal protein solution to generate foam in the mechanical vibration process, so that the surface area is increased, and in the vibration process, the protein on the surface of the foam is denatured, so that the protein is solidified on the surface to form a film, so that the stirred air cannot leak.
The preparation method of the porous zirconia ceramic comprises the following steps:
(1) dissolving zirconia powder in pure water to prepare a 25-50 wt% aqueous solution, adding a dispersing agent, and uniformly mixing to obtain a slurry;
(2) adding an animal protein foaming agent into the slurry obtained in the step (1), adding a foam stabilizer, grinding, pouring into a polytetrafluoroethylene mold, foaming, curing, molding, demolding to obtain a ceramic biscuit,
(3) and sintering the ceramic biscuit at 1450-1530 ℃ to obtain the porous zirconia ceramic.
In the step (2), the grinding is preferably carried out in a planetary mill, the grinding time is 30-60 min, and the rotating speed is 120-160 r/min.
Preferably, the polytetrafluoroethylene mold is internally coated with a release agent prior to use. The release agent is waste engine oil or waste diesel oil.
The curing and forming temperature is 75-95 ℃, and the time is 10-15 h.
In the step (3), the temperature is raised to 1450-1530 ℃ at the temperature rise rate of 2-4 min/DEG C during sintering, the temperature is kept for 1-3 h, and then the temperature is naturally reduced.
Compared with the prior art, the invention has the following beneficial effects:
(1) according to the invention, the animal protein foaming agent is added in the zirconia slurry for foaming, so that the process is simple, the manufacturing cost is low, complex and expensive equipment is not needed, and a new process is explored for preparing the porous ceramic with controllable porosity in the future;
(2) according to the invention, the solid content of the slurry and the addition of the animal protein foaming agent are adjusted, so that the pore structure and pore distribution of the porous zirconia ceramic can be adjusted;
(3) the porosity of the porous zirconia ceramic material prepared by the invention reaches more than 70 percent.
Detailed Description
The present invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Example 1
The porous zirconia ceramic comprises the following raw materials: 89.99% of zirconium oxide powder, 1% of polyethyleneimine, 8% of animal protein foaming agent, 0.01% of hydroxypropyl methyl cellulose and 1% of polyethylene glycol (600).
The preparation process comprises the following steps:
(1) dissolving zirconia powder in pure water to prepare a 25 wt% aqueous solution, then adding polyethyleneimine and polyethylene glycol, and uniformly mixing to obtain slurry;
(2) adding an animal protein foaming agent into the mixture obtained in the step (1), adding hydroxypropyl methyl cellulose, uniformly grinding for 30min in a planetary mill, pouring the ground mixture into a polytetrafluoroethylene mold coated with waste engine oil, placing the polytetrafluoroethylene mold into a drying box, foaming at the temperature of 75 ℃, curing and forming for 10h, and demolding after the slurry is cured to obtain a ceramic biscuit;
(3) and sintering the ceramic biscuit for 2h at 1450 ℃ to obtain the porous zirconia ceramic.
Example 2
The porous zirconia ceramic comprises the following raw materials: 91.99% of zirconium oxide powder, 2% of polyethyleneimine, 5% of animal protein foaming agent, 0.01% of paraffin emulsion and 1% of polyethylene glycol (600).
The preparation process comprises the following steps:
(1) dissolving zirconia powder in pure water to prepare a 30 wt% aqueous solution, then adding polyethyleneimine and polyethylene glycol, and uniformly mixing to obtain slurry;
(2) adding an animal protein foaming agent into the mixture obtained in the step (1), adding hydroxypropyl methyl cellulose, uniformly grinding for 40min in a planetary mill, pouring the ground mixture into a polytetrafluoroethylene mold coated with waste engine oil inside, and forming to obtain a ceramic blank;
(3) placing the ceramic blank with the polytetrafluoroethylene mold in a drying oven, foaming and curing at 80 ℃ for 12h, demolding after the slurry is cured to obtain a ceramic biscuit, and sintering the ceramic biscuit at 1480 ℃ for 1h to obtain the porous zirconia ceramic.
Example 3
The porous zirconia ceramic comprises the following raw materials: 88.99% of zirconia powder, 1% of polyacrylamide, 8% of animal protein foaming agent, 0.01% of paraffin emulsion and 2% of polyvinyl alcohol.
The preparation process comprises the following steps:
(1) dissolving zirconia powder in pure water to prepare a 40 wt% aqueous solution, adding polyethyleneimine and polyvinyl alcohol, and uniformly mixing to obtain slurry;
(2) adding an animal protein foaming agent into the mixture obtained in the step (1), then adding paraffin emulsion, uniformly grinding for 45min in a planetary mill, pouring the ground mixture into a polytetrafluoroethylene mold coated with waste engine oil inside, and forming to obtain a ceramic blank;
(3) placing the ceramic blank with the polytetrafluoroethylene mold in a drying oven, foaming and curing at 90 ℃ for 12h, demolding after the slurry is cured to obtain a ceramic biscuit, and sintering the ceramic biscuit at 1500 ℃ for 2h to obtain the porous zirconia ceramic.
Example 4
The porous zirconia ceramic comprises the following raw materials: 87.98% of zirconia powder, 2% of polyethyleneimine, 9% of animal protein foaming agent, 0.02% of hydroxypropyl methyl cellulose and 1% of polyvinyl alcohol.
The preparation process comprises the following steps:
(1) dissolving zirconia powder in pure water to prepare a 50 wt% aqueous solution, then adding polyethyleneimine and polyvinyl alcohol, and uniformly mixing to obtain slurry;
(2) adding an animal protein foaming agent into the mixture obtained in the step (1), then adding hydroxypropyl methyl cellulose, uniformly grinding for 50min in a planetary mill, pouring the ground mixture into a polytetrafluoroethylene mold coated with waste engine oil inside, and forming to obtain a ceramic blank;
(3) placing the ceramic blank with the polytetrafluoroethylene mold in a drying oven, foaming and curing at 90 ℃ for 10h, demolding after the slurry is cured to obtain a ceramic biscuit, and sintering the ceramic biscuit at 1530 ℃ for 2h to obtain the porous zirconia ceramic.
Comparative example 1
The porous zirconia ceramic comprises the following raw materials: 89.98% of zirconia powder, 1% of polyacrylamide, 7% of polyurethane foaming agent, 0.02% of paraffin emulsion and 2% of polyvinyl alcohol.
The preparation process comprises the following steps:
(1) dissolving zirconia powder in pure water to prepare a 40 wt% aqueous solution, adding polyethyleneimine and polyvinyl alcohol, and uniformly mixing to obtain slurry;
(2) adding a polyurethane foaming agent into the mixture obtained in the step (1), then adding a paraffin emulsion, uniformly grinding for 45min in a planetary mill, pouring the ground mixture into a polytetrafluoroethylene mold coated with waste engine oil inside, and forming to obtain a ceramic blank;
(3) placing the ceramic blank with the polytetrafluoroethylene mold in a drying oven, foaming and curing at 90 ℃ for 12h, demolding after the slurry is cured to obtain a ceramic biscuit, and sintering the ceramic biscuit at 1500 ℃ for 2h to obtain the porous zirconia ceramic.
The performance of the porous zirconia ceramics prepared in the above examples 1-4 and the porous zirconia ceramics prepared in the comparative example 1 is tested, wherein the porosity test method is the GB 6288-86 granular molecular sieve particle size determination method; the compression strength detection method is a GB/T1964-1996 porous ceramic compression strength test method; the pore diameter detection method is a GB/T1967-1996 porous ceramic pore diameter test method; the bending strength detection method is a GB/T4741-1999 ceramic material bending strength test method. The results are shown in Table 1.
TABLE 1 results of performance test of porous zirconia ceramics prepared in each example and comparative example
| Item | Example 1 | Example 2 | Example 3 | Example 4 | Comparative example 1 |
| Porosity (%) | 73 | 73 | 72 | 75 | 64 |
| Compressive Strength (MPa) | 6.2 | 6.4 | 6.2 | 6.3 | 5.6 |
| Average pore diameter (μm) | 0.82 | 0.88 | 0.85 | 0.91 | 1.21 |
| Bending strength (MPa) | 51 | 55 | 52 | 58 | 45 |
Claims (10)
1. A porous zirconia ceramic characterized by: the material is prepared from the following raw materials in percentage by weight:
the foaming agent is animal protein foaming agent.
2. The porous zirconia ceramic of claim 1, wherein: the zirconia powder is preferably yttrium-stabilized zirconia with a particle size of 0.4-0.5 μm.
3. The porous zirconia ceramic of claim 1, wherein: the dispersant is polyethyleneimine or polyacrylamide.
4. The porous zirconia ceramic of claim 1, wherein: the binder is polyethylene glycol or polyvinyl alcohol.
5. The porous zirconia ceramic of claim 1, wherein: the foam stabilizer is hydroxypropyl methyl cellulose, oleic acid or paraffin emulsion.
6. A method for producing the porous zirconia ceramic according to any one of claims 1 to 5, characterized in that: the method comprises the following steps:
(1) dissolving zirconia powder in pure water to prepare a 25-50 wt% aqueous solution, adding a dispersing agent, and uniformly mixing to obtain a slurry;
(2) adding an animal protein foaming agent into the slurry obtained in the step (1), adding a foam stabilizer, grinding, pouring into a polytetrafluoroethylene mold, foaming, curing, molding, demolding to obtain a ceramic biscuit,
(3) and sintering the ceramic biscuit at 1450-1530 ℃ to obtain the porous zirconia ceramic.
7. The method for producing a porous zirconia ceramic according to claim 6, characterized in that: in the step (2), grinding is carried out in a planetary mill for 30-60 min at a rotation speed of 120-160 r/min.
8. The method for producing a porous zirconia ceramic according to claim 7, characterized in that: in the step (2), before the polytetrafluoroethylene mold is used, a release agent is coated inside the polytetrafluoroethylene mold, and the release agent is waste engine oil or waste diesel oil.
9. The method for producing a porous zirconia ceramic according to claim 8, characterized in that: in the step (2), the curing and forming temperature is 75-95 ℃ and the time is 10-15 h.
10. The method for producing a porous zirconia ceramic according to claim 9, characterized in that: in the step (3), the temperature is raised to 1450-1530 ℃ at the temperature rise rate of 2-4 min/DEG C during sintering, the temperature is kept for 1-3 h, and then the temperature is naturally reduced.
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| CN108467281A (en) * | 2018-03-26 | 2018-08-31 | 东莞信柏结构陶瓷股份有限公司 | The preparation method of zircite porous ceramic |
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