CN111875407A - Wet spinning coextrusion preparation of straight-through hole alumina ceramic with compact hole wall - Google Patents
Wet spinning coextrusion preparation of straight-through hole alumina ceramic with compact hole wall Download PDFInfo
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Abstract
The invention provides a method for preparing straight-through hole alumina ceramics with compact hole walls by wet spinning coextrusion, which is characterized by comprising the following steps: 1) firstly, adding a curing agent and a plasticizer into an organic solvent, stirring and dissolving, then respectively adding ceramic powder of a cell body of a monolithic precursor and a cell body interface layer to form spinning slurry with two different components, pouring the spinning slurry into different injectors, spraying the spinning slurry into a gel tank through a co-extrusion spinning head under mechanical pressure, and carrying out solidification forming to obtain the monolithic precursor with the interface layer; 2) warm-pressing and forming; 3) vacuum degreasing; 4) hot pressing and sintering; 5) high-temperature oxidation to obtain the straight-through hole alumina ceramic with compact hole walls. The microstructure of the straight-through hole zirconia ceramic obtained by the invention is accurately controlled, the hole wall is completely compact and uniform in thickness, the strength is high, the hole wall thickness can reach 250 mu m, and the hole diameter can reach micron level.
Description
Technical Field
The invention provides a method for preparing straight-through hole alumina ceramics with compact hole walls by wet spinning coextrusion, belonging to the technical field of porous ceramic preparation.
Background
The porous ceramic has the characteristics of small volume density, high porosity, large specific surface area, selective permeability to liquid and gas media, energy absorption or damping characteristic and the like, particularly the straight-through porous ceramic has a parallel through cellular pore channel structure in the straight-through porous ceramic, is favorable for the entrance of reactants and the discharge of products, has a large geometric surface, and has uniform flow distribution of fluid in the straight-through porous ceramic, so the straight-through porous ceramic is widely applied to various aspects such as gas-liquid filtration, purification and separation and the like. The traditional method for preparing the straight-through porous ceramic is mud extrusion molding, namely dry spinning molding, wherein a green body is aged and pugged in vacuum to enable the green body to have certain plasticity, and the green body is continuously molded through a neck mold with a certain shape under the extrusion action of a screw or a plunger of an extruder. However, the prepared through-hole ceramic has the following defects: first, the aperture is big, and the aperture is generally at the millimeter level, because the pug has plasticity, and the contractility is big, and the aperture undersize is easy to be blockked up. Secondly, the thickness of the hole wall is thinner, the extrusion pressure is higher, and the straight-through hole ceramic with the hole wall smaller than 1mm is difficult to form; thirdly, the hole wall is not compact, most of the raw materials for extrusion molding belong to barren materials, and the raw materials have no plasticity. It must be plasticized prior to extrusion, usually by the addition of plasticizers or binders. Organic plasticizers such as dextrin, industrial syrup, carboxymethyl cellulose, polyvinyl acetate and polyvinyl alcohol are commonly used in industrial production. The addition of the organic plasticizer forms holes after sintering, reduces the compactness of the hole wall, and further ensures that the bending strength of the through hole ceramic prepared by extrusion molding is lower. Further reducing the aperture size of the through hole ceramic and improving the compactness of the hole wall has important theoretical significance and practical value for popularization and application of the through hole ceramic.
Disclosure of Invention
The invention aims to solve the problems of large aperture and non-compact pore wall of the existing through pore ceramic, and provides a method for preparing through pore alumina ceramic with compact pore wall by wet spinning coextrusion. The technical scheme is as follows:
the wet spinning coextrusion preparation method of the straight-through hole alumina ceramic with compact hole walls is characterized by comprising the following steps:
1) preparing a fibrous monolith precursor with an interface layer by wet spinning coextrusion: firstly adding a curing agent and a plasticizer into an organic solvent, stirring and dissolving, then respectively adding ceramic powder of a monolithic precursor cell body and ceramic powder of a monolithic precursor cell body interface layer, uniformly stirring to form two spinning slurry with different components, then respectively pouring the spinning slurry into different injectors, spraying the spinning slurry into a gel tank filled with water through a co-extrusion spinning head under the mechanical pressure, wherein the water temperature of the gel tank is 0-10 ℃, soaking for 8-24 hours after solidification and forming, obtaining a fibromonolithic precursor with an interface layer, wherein the fibromonolithic precursor with the interface layer consists of a fibromonolithic precursor cell body and a cell body interface layer, the diameter of the fibromonolithic precursor cell body is 500-2000 mu m, the thickness of the cell body interface layer is 250-1000 mu m, wherein the curing agent is polyvinyl butyral, the plasticizer is polyethylene glycol, and the organic solvent is absolute ethyl alcohol;
2) warm-pressing and forming: cutting a fiber monolithic precursor with an interface layer according to the size of a graphite die for hot-pressing sintering, arranging the fiber monolithic precursor in the graphite die in parallel, and compacting the fiber monolithic precursor at the temperature of 60-100 ℃ and under the pressure of 20-50 MPa to obtain a ceramic green body;
3) vacuum degreasing: putting the ceramic green body and the graphite mold into a vacuum degreasing furnace, performing vacuum degreasing, wherein the heating rate is 0.25-1 ℃/min, the temperature is increased to 600-700 ℃, and the temperature is kept for 0.5-1 h;
4) hot-pressing and sintering: after degreasing, hot-pressing and sintering in an argon atmosphere, wherein the sintering temperature is 1700-1800 ℃, the temperature is kept for 0.5-2 h, and the pressure is 20-60 MPa, so that the fiber monolithic ceramic is obtained;
5) high-temperature oxidation: oxidizing the fibrous monolith ceramic at 800-1200 ℃, and removing cells by oxidation to obtain the straight-through hole alumina ceramic with compact hole walls, wherein the hole diameter is 250-1000 mu m, and the thickness of the hole walls is 250-1000 mu m.
The wet spinning coextrusion is used for preparing the straight-through hole alumina ceramic with compact hole walls, and in the step 1), the ceramic powder for preparing the monolithic precursor cell body consists of carbon black powder or charcoal powder.
The wet spinning coextrusion preparation method is characterized in that straight-through hole alumina ceramics with compact hole walls are prepared, and in the step 1), ceramic powder for preparing the monolithic precursor cell body interface layer is prepared from alumina powder, yttrium oxide powder and magnesium oxide powder according to the mass percentage of 90-95%: 2-5%: 2-5% by weight.
In the step 1), based on the weight of ceramic powder for preparing the monolithic precursor cell body, 10-20% of a curing agent, 10-20% of a plasticizer and 100-200% of an organic solvent are weighed according to weight percentage.
In the step 1), based on the weight of ceramic powder for preparing the monolithic precursor cell interface layer, 10-20% of a curing agent, 10-20% of a plasticizer and 100-200% of an organic solvent are weighed according to weight percentage.
The working principle of the invention is as follows: provides a new process for preparing the straight-through hole alumina ceramic with compact hole walls by a wet spinning coextrusion-hot pressing method. Firstly adding a curing agent and a plasticizer into an organic solvent, stirring and dissolving, then respectively adding ceramic powder of a monolithic precursor cell body and a monolithic precursor cell body interface layer, uniformly stirring to form spinning slurry with two different components, then extruding the two different spinning slurry from a co-extrusion spinning nozzle to be in a thin flow shape, and then curing and forming in a gel groove filled with water to obtain the monolithic precursor with the interface layer, wherein the curing agent is polyvinyl butyral, the plasticizer is polyethylene glycol, and the organic solvent is absolute ethyl alcohol; then arranging the fibrous monolithic precursors with the interface layer in parallel, warm-pressing for molding, vacuum degreasing, hot-pressing for sintering to prepare the fibrous monolithic ceramic, wherein the cell body is carbon black powder or charcoal powder material, and the cell body interface layer is Al2O3A base material; and finally, oxidizing at 1200-1500 ℃ to remove the cell carbon black powder or the charcoal powder by oxidation, thereby forming the through-hole alumina ceramic with compact hole walls, wherein the hole walls are completely compact, the hole diameters reach the micron level, and the structural schematic diagram is shown in figure 1.
Compared with the prior art, the invention has the following advantages:
1. the method comprises the following steps of forming a fibrous monolithic precursor with an interface layer by a wet spinning co-extrusion method, preparing the continuous, superfine, high-toughness and compact fibrous monolithic precursor with the interface layer, wherein the diameter of a cell body can reach 500 mu m, the thickness of the cell body interface layer can reach 250 mu m, the length of the cell body interface layer can reach more than 10 m, and the fibrous monolithic precursor can not be broken when bent by 180 degrees and is convenient to arrange;
2. the curing agent is polyvinyl butyral, the plasticizer is polyethylene glycol, after the ceramic green body is degreased in vacuum, the polyvinyl butyral and the polyethylene glycol are pyrolyzed into micromolecular carbon particles to be removed, no carbon residue exists, and the residual carbon can reduce the bending strength of the straight-through hole alumina ceramic;
3. the wet spinning coextrusion method is used for forming the fiber monolithic precursor, so that the uneven thickness of the coating layer of the dipping method is changed, the process is simplified, and the accurate control of the microstructure of the straight-through hole alumina ceramic is achieved;
4. the prepared straight-through hole alumina ceramic has completely compact hole walls, so that the straight-through hole alumina ceramic has higher bending strength;
5. the straight-through hole alumina ceramic is prepared through wet spinning coextrusion, hot pressing sintering and high temperature oxidation, and the aperture reaches the micron order, which can not be realized by the traditional pug extrusion molding.
Drawings
FIG. 1 is a schematic structural diagram of a through-hole alumina ceramic with dense pore walls according to the present invention.
In the figure: 1. the pore wall of the straight-through pore alumina ceramic; 2. straight-through holes of the straight-through hole alumina ceramic.
Detailed Description
Example 1
1. Preparing a fibromonolithic precursor cell body silk spraying liquid: firstly, stirring and dissolving 10 g of polyvinyl butyral and 10 g of polyethylene glycol in 100 g of absolute ethyl alcohol, then adding ceramic powder of a fibromonolithic precursor cell body, wherein the ceramic powder of the fibromonolithic precursor cell body consists of 100 g of carbon black powder, and uniformly stirring to prepare a fibromonolithic precursor cell body silk spraying liquid;
2. preparing a fiber monolith precursor cell body interface layer silk spraying liquid: firstly, stirring and dissolving 10 g of polyvinyl butyral and 10 g of polyethylene glycol in 100 g of absolute ethyl alcohol, and then adding ceramic powder of a cell interface layer of a fiber monolithic precursor, wherein the ceramic powder of the cell interface layer of the fiber monolithic precursor is prepared from 90 g of alumina powder, 5 g of yttrium oxide powder and 5 g of magnesium oxide powder according to the mass percentage of 90%: 5%: 5 percent of the mixture is mixed and stirred evenly to prepare the fiber monolith precursor cell body interface layer silk spraying liquid;
3. wet spinning coextrusion to prepare a fibrous monolith precursor with an interfacial layer: respectively pouring the fibromonolithic precursor cell body silk spraying liquid and the fibromonolithic precursor cell body interface layer silk spraying liquid into different injectors, spraying the silk spraying slurry into a gel tank filled with water through a co-extrusion spinning nozzle under the mechanical pressure, wherein the water temperature of the gel tank is 0 ℃, and soaking for 8 hours after solidification forming to obtain the fibromonolithic precursor with the interface layer, wherein the fibromonolithic precursor with the interface layer consists of a fibromonolithic precursor cell body and a cell body interface layer, the diameter of the fibromonolithic precursor cell body is 500 mu m, and the thickness of the cell body interface layer is 250 mu m;
4. warm-pressing and forming: cutting a fiber monolithic precursor with an interface layer according to the size of a graphite die for hot-pressing sintering, arranging the fiber monolithic precursor in the graphite die in parallel, and carrying out warm pressing at 60 ℃ and 20MPa to compact the fiber monolithic precursor to obtain a ceramic green body;
5. vacuum degreasing: putting the ceramic green body and the graphite mold into a vacuum degreasing furnace, degreasing in vacuum, heating to 600 ℃ at the heating speed of 0.25 ℃/min, and keeping the temperature for 0.5 h;
6. hot-pressing and sintering: after degreasing, hot-pressing and sintering under argon atmosphere, wherein the sintering temperature is 1700 ℃, the temperature is kept for 0.5h, and the pressure is 20MPa, so that the fiber monolithic ceramic is obtained;
7. high-temperature oxidation: oxidizing the fibrous monolith ceramic at 1200 ℃ for 5h, and removing cells by oxidation to obtain the straight-through hole alumina ceramic with compact hole walls, wherein the hole diameter is 250 mu m, and the hole wall thickness is 250 mu m.
Example 2
1. Preparing a fibromonolithic precursor cell body silk spraying liquid: firstly stirring and dissolving 20 g of polyvinyl butyral and 20 g of polyethylene glycol in 200 g of absolute ethyl alcohol, then adding ceramic powder of a fibromonolithic precursor cell body, wherein the ceramic powder of the fibromonolithic precursor cell body consists of 100 g of carbon black powder, and uniformly stirring to prepare a fibromonolithic precursor cell body silk spraying liquid;
2. preparing a fiber monolith precursor cell body interface layer silk spraying liquid: firstly stirring and dissolving 20 g of polyvinyl butyral and 20 g of polyethylene glycol in 200 g of absolute ethyl alcohol, and then adding ceramic powder of a cell interface layer of a fiber monolithic precursor, wherein the ceramic powder of the cell interface layer of the fiber monolithic precursor is prepared from 96 g of alumina powder, 2 g of yttrium oxide powder and 2 g of magnesium oxide powder according to the mass percentage of 96%: 2%: 2 percent of the mixture is mixed and stirred evenly to prepare the fiber monolith precursor cell body interface layer silk spraying liquid;
3. wet spinning coextrusion to prepare a fibrous monolith precursor with an interfacial layer: respectively pouring the fibromonolithic precursor cell body silk spraying liquid and the fibromonolithic precursor cell body interface layer silk spraying liquid into different injectors, spraying the silk spraying slurry into a gel tank filled with water through a co-extrusion spinning nozzle under mechanical pressure, wherein the water temperature of the gel tank is 10 ℃, and soaking for 24 hours after solidification forming to obtain the fibromonolithic precursor with an interface layer, wherein the fibromonolithic precursor with the interface layer consists of a fibromonolithic precursor cell body and a cell body interface layer, the diameter of the fibromonolithic precursor cell body is 2000 mu m, and the thickness of the cell body interface layer is 1000 mu m;
4. warm-pressing and forming: cutting a fiber monolithic precursor with an interface layer according to the size of a graphite die for hot-pressing sintering, arranging the fiber monolithic precursor in the graphite die in parallel, and carrying out warm pressing at 100 ℃ and 50MPa to compact the fiber monolithic precursor to obtain a ceramic green body;
5. vacuum degreasing: putting the ceramic green body and the graphite mold into a vacuum degreasing furnace, degreasing in vacuum, heating to 700 ℃ at the heating speed of 1 ℃/min, and keeping the temperature for 1 h;
6. hot-pressing and sintering: after degreasing, hot-pressing and sintering under the argon atmosphere, wherein the sintering temperature is 1800 ℃, the temperature is kept for 2h, and the pressure is 60MPa, so that the fiber monolithic ceramic is obtained;
7. high-temperature oxidation: oxidizing the fiber monolithic ceramics at 1500 ℃ for 1h, and removing cells by oxidation to obtain the straight-through hole alumina ceramics with compact hole walls, wherein the hole diameter is 1000 mu m, and the hole wall thickness is 1000 mu m.
Example 3
1. Preparing a fibromonolithic precursor cell body silk spraying liquid: firstly stirring and dissolving 15 g of polyvinyl butyral and 15 g of polyethylene glycol in 150 g of absolute ethanol, then adding ceramic powder of a fibromonolithic precursor cell body, wherein the ceramic powder of the fibromonolithic precursor cell body consists of 100 g of charcoal powder, and uniformly stirring to prepare a fibromonolithic precursor cell body silk spraying liquid;
2. preparing a fiber monolith precursor cell body interface layer silk spraying liquid: firstly, stirring and dissolving 15 g of polyvinyl butyral and 15 g of polyethylene glycol in 150 g of absolute ethanol, and then adding ceramic powder of a cell interface layer of a fiber monolithic precursor, wherein the ceramic powder of the cell interface layer of the fiber monolithic precursor is prepared from 92 g of alumina powder, 4 g of yttrium oxide powder and 4 g of magnesium oxide powder according to the mass percentage of 92%: 4%: 4 percent of the mixture is mixed and stirred evenly to prepare the fiber monolith precursor cell body interface layer silk spraying liquid;
3. wet spinning coextrusion to prepare a fibrous monolith precursor with an interfacial layer: respectively pouring the fibromonolithic precursor cell body silk spraying liquid and the fibromonolithic precursor cell body interface layer silk spraying liquid into different injectors, spraying the silk spraying slurry into a gel tank filled with water through a co-extrusion spinning nozzle under the mechanical pressure, wherein the water temperature of the gel tank is 5 ℃, and soaking for 12 hours after solidification forming to obtain the fibromonolithic precursor with the interface layer, wherein the fibromonolithic precursor with the interface layer consists of a fibromonolithic precursor cell body and a cell body interface layer, the diameter of the fibromonolithic precursor cell body is 1000 mu m, and the thickness of the cell body interface layer is 500 mu m;
4. warm-pressing and forming: cutting a fiber monolithic precursor with an interface layer according to the size of a graphite die for hot-pressing sintering, arranging the fiber monolithic precursor in the graphite die in parallel, and carrying out warm pressing at 80 ℃ and 30MPa to compact the fiber monolithic precursor to obtain a ceramic green body;
5. vacuum degreasing: putting the ceramic green body and the graphite mold into a vacuum degreasing furnace, performing vacuum degreasing, wherein the heating rate is 0.5 ℃/min, the temperature is increased to 650 ℃, and the temperature is kept for 0.75 h;
6. hot-pressing and sintering: after degreasing, hot-pressing and sintering in argon atmosphere at 1750 ℃, keeping the temperature for 1h and the pressure of 40MPa to obtain the fiber monolithic ceramic;
7. high-temperature oxidation: oxidizing the fiber monolithic ceramics at 1300 ℃ for 3h, and removing cells by oxidation to obtain the straight-through hole alumina ceramics with compact hole walls, wherein the hole diameter is 500 mu m, and the hole wall thickness is 500 mu m.
Example 4
1. Preparing a fibromonolithic precursor cell body silk spraying liquid: firstly stirring and dissolving 18 g of polyvinyl butyral and 18 g of polyethylene glycol in 200 g of absolute ethyl alcohol, then adding ceramic powder of a fibromonolithic precursor cell body, wherein the ceramic powder of the fibromonolithic precursor cell body consists of 100 g of charcoal powder, and uniformly stirring to prepare a fibromonolithic precursor cell body silk spraying liquid;
2. preparing a fiber monolith precursor cell body interface layer silk spraying liquid: firstly stirring and dissolving 18 g of polyvinyl butyral and 18 g of polyethylene glycol in 200 g of absolute ethyl alcohol, and then adding ceramic powder of a cell interface layer of a fiber monolithic precursor, wherein the ceramic powder of the cell interface layer of the fiber monolithic precursor is prepared from 95 g of alumina powder, 2 g of yttrium oxide powder and 3 g of magnesium oxide powder according to the mass percentage of 95%: 2%: 3 percent of the mixture is mixed and stirred evenly to prepare the fiber monolith precursor cell body interface layer silk spraying liquid;
3. wet spinning coextrusion to prepare a fibrous monolith precursor with an interfacial layer: respectively pouring the fibromonolithic precursor cell body silk spraying liquid and the fibromonolithic precursor cell body interface layer silk spraying liquid into different injectors, spraying the silk spraying slurry into a gel tank filled with water through a co-extrusion spinning nozzle under mechanical pressure, wherein the water temperature of the gel tank is 2 ℃, and soaking for 10 hours after solidification forming to obtain the fibromonolithic precursor with the interface layer, wherein the fibromonolithic precursor with the interface layer consists of a fibromonolithic precursor cell body and a cell body interface layer, the diameter of the fibromonolithic precursor cell body is 800 mu m, and the thickness of the cell body interface layer is 400 mu m;
4. warm-pressing and forming: cutting a fiber monolithic precursor with an interface layer according to the size of a graphite die for hot-pressing sintering, arranging the fiber monolithic precursor in the graphite die in parallel, and carrying out warm pressing at 70 ℃ and 40MPa to compact the fiber monolithic precursor to obtain a ceramic green body;
5. vacuum degreasing: putting the ceramic green body and the graphite mold into a vacuum degreasing furnace, degreasing in vacuum, heating to 650 ℃ at the heating speed of 1 ℃/min, and keeping the temperature for 0.5 h;
6. hot-pressing and sintering: after degreasing, hot-pressing and sintering in argon atmosphere, wherein the sintering temperature is 1780 ℃, the temperature is kept for 1h, and the pressure is 30MPa, so that the fiber monolithic ceramic is obtained;
7. high-temperature oxidation: oxidizing the fiber monolithic ceramics at 1400 ℃ for 2h, and removing cells by oxidation to obtain the straight-through hole alumina ceramics with compact hole walls, wherein the hole diameter is 400 mu m, and the hole wall thickness is 400 mu m.
Claims (5)
1. The wet spinning coextrusion preparation method of the straight-through hole alumina ceramic with compact hole walls is characterized by comprising the following steps:
1) preparing a fibrous monolith precursor with an interface layer by wet spinning coextrusion: firstly adding a curing agent and a plasticizer into an organic solvent, stirring and dissolving, then respectively adding ceramic powder of a monolithic precursor cell body and ceramic powder of a monolithic precursor cell body interface layer, uniformly stirring to form two spinning slurry with different components, then respectively pouring the spinning slurry into different injectors, spraying the spinning slurry into a gel tank filled with water through a co-extrusion spinning head under the mechanical pressure, wherein the water temperature of the gel tank is 0-10 ℃, soaking for 8-24 hours after solidification and forming, obtaining a fibromonolithic precursor with an interface layer, wherein the fibromonolithic precursor with the interface layer consists of a fibromonolithic precursor cell body and a cell body interface layer, the diameter of the fibromonolithic precursor cell body is 500-2000 mu m, the thickness of the cell body interface layer is 250-1000 mu m, wherein the curing agent is polyvinyl butyral, the plasticizer is polyethylene glycol, and the organic solvent is absolute ethyl alcohol;
2) warm-pressing and forming: cutting a fiber monolithic precursor with an interface layer according to the size of a graphite die for hot-pressing sintering, arranging the fiber monolithic precursor in the graphite die in parallel, and compacting the fiber monolithic precursor at the temperature of 60-100 ℃ and under the pressure of 20-50 MPa to obtain a ceramic green body;
3) vacuum degreasing: putting the ceramic green body and the graphite mold into a vacuum degreasing furnace, performing vacuum degreasing, wherein the heating rate is 0.25-1 ℃/min, the temperature is increased to 600-700 ℃, and the temperature is kept for 0.5-1 h;
4) hot-pressing and sintering: after degreasing, hot-pressing and sintering in an argon atmosphere, wherein the sintering temperature is 1700-1800 ℃, the temperature is kept for 0.5-2 h, and the pressure is 20-60 MPa, so that the fiber monolithic ceramic is obtained;
5) high-temperature oxidation: oxidizing the fiber monolithic ceramics at 1200-1500 ℃ for 1-5 h, and removing cells by oxidation to obtain the straight-through hole alumina ceramics with compact hole walls, wherein the hole diameter is 250-1000 mu m, and the thickness of the hole walls is 250-1000 mu m.
2. The wet spin coextrusion process of claim 1 to produce a through-hole alumina ceramic with dense pore walls, wherein: in the step 1), the ceramic powder for preparing the fibrous monolith precursor cell body consists of carbon black powder or charcoal powder.
3. The wet spin coextrusion process of claim 1 to produce a through-hole alumina ceramic with dense pore walls, wherein: in the step 1), the ceramic powder for preparing the monolithic precursor cell body interface layer is prepared from 90-96% by mass of alumina powder, yttrium oxide powder and magnesium oxide powder: 2-5%: 2-5% by weight.
4. The wet spin coextrusion process of claim 1 to produce a through-hole alumina ceramic with dense pore walls, wherein: in the step 1), based on the weight of the ceramic powder for preparing the monolithic precursor cell body, 10-20% of a curing agent, 10-20% of a plasticizer and 100-200% of an organic solvent are weighed according to weight percentage.
5. The wet spin coextrusion process of claim 1 to produce a through-hole alumina ceramic with dense pore walls, wherein: in the step 1), based on the weight of the ceramic powder for preparing the monolithic precursor cell interface layer, 10-20% of a curing agent, 10-20% of a plasticizer and 100-200% of an organic solvent are weighed according to weight percentage.
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| KR20050020578A (en) * | 2003-08-18 | 2005-03-04 | 이병택 | A continuously porous ceramic body by fibrous monolithic process and manufacturing method thereof |
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| CN108191453A (en) * | 2018-04-04 | 2018-06-22 | 刘成云 | A kind of porous silicon carbide ceramic and preparation method thereof |
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| CN109293384A (en) * | 2018-10-31 | 2019-02-01 | 哈尔滨工业大学 | A method of preparing isotropic zirconium boride based ultra-high temperature monolithic structure ceramics in the face of high damage tolerance |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20050020578A (en) * | 2003-08-18 | 2005-03-04 | 이병택 | A continuously porous ceramic body by fibrous monolithic process and manufacturing method thereof |
| CN101555138A (en) * | 2008-04-09 | 2009-10-14 | 中国科学院金属研究所 | Silicon carbide foamed ceramic corrugated plate and preparation method thereof |
| CN108191453A (en) * | 2018-04-04 | 2018-06-22 | 刘成云 | A kind of porous silicon carbide ceramic and preparation method thereof |
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