8392results about "Ceramicware" patented technology

The invention discloses a method of preparing aluminum oxide-silicon carbide compound porous ceramic by aluminum-silicon industrial waste residues. The primary raw materials comprise industrial waste residues, carbon powder, a pore forming substance and an adhesive. The aluminum oxide-silicon carbide compound porous ceramic is prepared by the following steps of mixing, drying, forming and sintering to obtain a final product. Treatment and high additional value utilization of the industrial waste residues are achieved. The prepared porous ceramic is remarkable in performance, and can be applied to the fields of filtration, sound isolation, heat isolation, fire fighting and the like. The method is simple in process flow and convenient for industrialized promotion; and the cost is good to control and the method has extreme economical value.

The invention relates to the technical field of coal gangue, in particular to a process for preparing high-strength lightweight aggregate from high-calorific-value coal gangue, which comprises a drying link, a pyrolysis link, a decarburization link, a sintering link and a cooling link, and is characterized in that wet coal gangue pellets are sequentially subjected to drying, pyrolysis, decarburization and cooling to obtain water-retaining ceramsite; sequentially drying, pyrolyzing, decarbonizing, sintering and cooling the wet coal gangue pellets to obtain the high-strength ceramsite. High-temperature hot air of the cooling link is introduced into the sintering link, low-temperature hot air of the cooling link is introduced into the decarburization link, and tail gas of each link serves as high-temperature flue gas to be recycled towards the front link, so that the overall energy consumption of a process production line is reduced; in the pyrolysis link, gas separated out of the coal gangue is collected and serves as fuel to be introduced into the sintering kiln, so that the whole production line does not need additional energy input, in addition, the carbon content in the ceramsite is effectively reduced through pyrolysis and decarburization, and the product quality is improved.

The invention discloses a fiber foamed concrete and a preparation method thereof. The fiber foamed concrete comprises the following raw materials in parts by weight: 5290 parts of cement, 4965 parts of water, 1.361 part of foaming solution, 1.2964 part of fly ash and 10 parts of fiber. The preparation method comprises the following steps: proportionally weighing the components; sequentially adding the cement and fly ash into a stirrer, proportionally weighing the water, uniformly stirring the mixture by the stirrer, and adding the fiber; preparing and adding the foaming solution; gradually adding the foam into the mixture, and continuously stirring until all the components are uniformly mixed; pouring the mixture into a mold on which lubricating oil is brushed, and curing in a curing chamber; after 24 hours, removing the mold; and respectively curing for 3 days, 7 days and 28 days for experimental detection. The fiber foamed concrete has the advantages of favorable thermal insulation property, favorable compression resistance and favorable bending resistance, and is applicable to a railway bed strengthening layer.

An integrated carbon honeycomb structure material and its preparation method are disclosed, belonging to the field of carbon materials technology. Based on a co-sacrificial template low-temperature pyrolysis strategy, the target material can be obtained through three main steps: preparation of a metal salt-colloidal microsphere template precursor, precursor pressing and molding, and subsequent calcination and carbonization. This technology has the characteristics and advantages of simple preparation process, regular and controllable macroscopic structure of the sample (such as shape, area, and thickness), rich and tunable chemical composition, and three-dimensional interconnection of graphene carbon matrix. It has great application potential in many fields such as electrochemical energy storage, catalysis, gas separation, adsorption, and electromagnetic shielding.

The invention relates to the technical field of building materials, and particularly discloses high-strength lightweight concrete containing hollow glass beads and a preparation method of the high-strength lightweight concrete. The high-strength lightweight concrete containing the hollow glass beads is prepared from cement, fly ash, carbon fiber grafted hollow glass beads, lightweight sand, deionized water, polypropylene fiber grafted rubber particles and a water reducing agent according to the mass ratio of (58-75): (25-38): (45-65): (20-40): (42-55): (35-55): (5-12) through mixing, mold filling, vibration molding, covering and demolding. The addition amount of the hollow glass beads is strictly controlled, the influence on the overall strength of the concrete is avoided, the density and weight of the concrete are reduced due to the addition of the light sand and the hollow glass beads, the compactness and integrity of the concrete are improved due to the synergistic effect of the two added fibers, and the raw materials have excellent cohesiveness; the concrete can effectively absorb and disperse stress, and has the advantages of excellent strength, light weight, good durability and excellent comprehensive performance.

The invention relates to the technical field, and particularly discloses a nano-modified epoxy building thermal insulation material and a preparation method thereof. The nano modified epoxy building thermal insulation material is prepared from the following raw materials in parts by mass: 80 to 120 parts of Portland cement, 20 to 40 parts of slag powder, 5 to 10 parts of hollow mesoporous silicon dioxide, 0.1 to 1 part of pyrrole, 0.1 to 0.2 part of ammonium persulfate, 5 to 10 parts of nano silicon dioxide, 10 to 15 parts of bisphenol S epoxy resin, 1 to 5 parts of acrylic acid, 1 to 2 parts of polylysine, 0.01 to 0.1 part of catalyst and 1 to 2 parts of curing agent. The concrete is prepared from the following raw materials in parts by weight: 20-30 parts of epoxy resin, 4-8 parts of loaded aerogel, 0.1-1 part of polycarboxylate superplasticizer, 1-4 parts of composite fiber and 0.2-1.25 parts of hydrogen peroxide. The fireproof building material has excellent toughness, can better resist cracking and absorb energy, effectively avoids cracking and damage under the action of thermal stress, and ensures that the building material has a fireproof effect.

Systems and methods for forming an oxidation protection system on a composite structure are provided. In various embodiments, the oxidation protection system comprises a boron-glass layer formed on the composite substrate and a silicon-glass layer formed over the boron-glass layer. Each of the boron-glass layer and the silicon-glass layer include a glass former and a glass modifier. The boron-glass layer includes a boron compound comprising a mixture of boron carbide (B4C) powder and cubic boron nitride (BN) powder.

The invention relates to the technical field of material engineering, in particular to a preparation method and application of a light heat insulation cement aerogel material.The preparation method comprises the following steps that an adhesive is taken and dissolved in water, and then the solution is cooled to the room temperature; adding a dispersing agent into the solution, then adding cement, uniformly stirring, adding a hydrophobic component, and uniformly stirring; reinforcing fibers are added and evenly stirred, and the reinforcing fibers are at least one of polymer fibers, carbon fibers and glass fibers; adding the foaming component, and uniformly stirring; pouring the solution into a mold, performing freezing pore-forming by using liquid nitrogen, and recovering to room temperature after the freezing pore-forming is finished; and then drying to obtain the cement aerogel material after the drying is finished. The cement aerogel material prepared by the invention has excellent characteristics of high strength, light weight, non-flammability and the like, is used for a buffer layer of an explosion-proof tank, and can integrally improve the performance of the explosion-proof tank.

The present invention relates to a process for producing coated substrates. In the process, first at least one region of a surface of a porous substrate is provided with at least one surface sealing layer. At least one aqueous suspension is then applied onto the at least one surface sealing layer, the at least one aqueous suspension containing at least one refractory metal carbide and water. The substrate is then subjected to a sintering process. The present invention also relates to a coated substrate, which can be produced or is produced by the method according to the invention, and to the use of such a coated substrate.

The invention belongs to the technical field of material preparation. The invention provides a porous tantalum carbide ceramic as well as a preparation method and application thereof, the preparation method comprises the following steps: mixing tantalum powder and / or tantalum carbide powder with tantalum salt and an organic ligand source in a liquid phase system, rapidly cooling to form a solid, vacuumizing and sintering the obtained solid, and carbonizing to obtain the porous tantalum carbide ceramic. According to the preparation method, an organic ligand source provides a ligand, so that the ligand and tantalum form a metal organic framework structure, pores and distribution are adjusted, pore forming is realized through further decomposition or volatilization at a high temperature, and finally, the prepared porous silicon carbide ceramic has disordered micron-sized pores, and when the porous silicon carbide ceramic is applied to preparation of single crystal silicon carbide through a physical vapor deposition method, the pore forming efficiency is improved. Compared with a traditional graphite material, the graphite material can allow gaseous substances generated by silicon carbide to pass through, is resistant to high temperature and high in strength, does not participate in reaction, does not generate impurities entering crystals or forming carbon wrapping and the like, and effectively achieves the filtering effect.

The invention discloses efficient sound-absorbing lightweight aggregate foam concrete as well as a preparation method and application thereof, and belongs to the field of inorganic non-metallic materials. The high-efficiency sound-absorbing lightweight aggregate foam concrete is prepared from the following components in parts by weight: 85 to 95 parts of a sulfur-aluminum-iron series low-carbon cementing material, 5 to 15 parts of an auxiliary cementing material, 0.6 to 1.5 parts of a functional additive, 20 to 60 parts of unfired lightweight aggregate, 0.35 to 0.45 part of water and 0.5 to 1.5 L of prefabricated foam, the baking-free lightweight aggregate comprises the following components in parts by weight: 40-50 parts of a sulfur-aluminum-iron series low-carbon cementing material, 50-60 parts of byproduct gypsum, 0.7-1.5 parts of a chemical foaming agent, 15-22 parts of water and 5-8 parts of expanded perlite. According to the invention, a multi-stage-multi-scale pore structure body with expanded perlite pores, hydrogen peroxide foaming pores and physical foaming pores is constructed, so that the balanced broadband sound absorption performance of the material is realized, the sound absorption frequency range is adjustable, the sound absorption and noise reduction coefficient (NRC) of the material is greater than or equal to 0.80, the volume weight is less than or equal to 500 kg / m < 3 >, and the breaking strength is greater than or equal to 1.5 MPa.

The invention discloses sound-insulation and heat-insulation building mortar and a preparation method thereof, and relates to the technical field of building materials, the sound-insulation and heat-insulation building mortar comprises, by weight, 42-48 parts of a cementing material, 15-25 parts of an auxiliary material, 17-22 parts of lightweight aggregate, 30-35 parts of a functional filler, and 1-2 parts of an additive; the cementing material is a mixture of sulphoaluminate cement and Portland cement; the auxiliary material is a mixture of fly ash and quartz sand, the lightweight aggregate is a mixture of 20-40-mesh hollow vitrified microbeads and 70-90-mesh hollow vitrified microbeads, and the mass ratio of the hollow vitrified microbeads to the hollow vitrified microbeads is 1: (2-3); the functional filler is a mixture of modified waste rubber particles and modified fibers; the additive is a mixture of a polycarboxylate superplasticizer and hydroxypropyl methyl cellulose ether. The mortar disclosed by the invention is good in thermal insulation performance and excellent in mechanical property, the method disclosed by the invention is simple to operate and low in cost, and the prepared mortar is excellent in performance.

The invention discloses an in-situ whisker reinforced aerogel heat insulation composite material and a preparation method thereof, and the aerogel heat insulation composite material with high specific strength is prepared through fiber etching, whisker modification of fibers, sol preparation and dipping, aging, supercritical drying and high-temperature sintering. Aluminum oxide-silicon oxide composite aerogel is used for modifying ceramic fibers, whiskers are generated on the surfaces of the fibers in situ, the interface bonding force between the aerogel and the fibers is increased, and the mechanical property of the aerogel heat insulation composite material is remarkably improved.

The invention discloses a foam cement-based sound absorption material with an adjustable and controllable pore structure and a preparation method of the foam cement-based sound absorption material, and belongs to the technical field of building functional materials. Aiming at the problems of insufficient pore structure regulation and control, limited sound absorption performance and high cost of a traditional cement-based sound absorption material, P.O42.5R Portland cement is used as a basis, a physical-chemical synergistic foaming method and a three-stage gradient temperature control freeze-drying process are combined through the synergistic effect of a composite foaming agent, a microporous structure regulator and a composite pore forming agent, and the sound absorption material is prepared. Precise regulation and control of pores from the nm level to the mm level are achieved, and an interconnected pore channel network with the high open porosity is formed. The density of the obtained material is 200-1000 kg / m, the porosity is 60-90%, the aperture coverage range is 2 nm-6 mm, the open porosity is 70-85%, the 28d compressive strength is 1.83-14.56 MPa, the average sound absorption coefficient in the frequency range of 250-2000 Hz is 0.12-0.62, and the noise reduction coefficient is 0.14-0.64. The composite material has the characteristics of adjustable pore structure, light weight, high strength, broadband sound absorption, low cost and good durability, and is suitable for the noise control fields of building walls, traffic facilities and the like.

The invention relates to the field of building materials, and discloses a multifunctional foamed ceramic sound insulation and heat preservation material for buildings. Comprising the following raw materials in parts by weight: 42 to 48 parts of pottery clay tailings, 14 to 16 parts of fly ash, 10.5 to 12 parts of crushed stone materials, 2.8 to 3.2 parts of a silicon carbide foaming agent, 0.7 to 0.8 part of a borax fluxing agent, 7 to 8 parts of paraffin / silicon dioxide phase change microcapsules, 0.5 to 1.0 part of graphene, 2.0 to 2.5 parts of nano iron powder, 0.05 to 0.5 part of nano silver, 1.0 to 1.5 parts of photocatalytic titanium dioxide and 0.3 to 0.4 part of a fluorosilane coupling agent. A stable matrix structure is constructed through the argil tailings, the fly ash and the crushed stone materials, the silicon carbide foaming agent and the borax fluxing agent reduce the heat conductivity coefficient, the sound insulation performance is improved, the material is endowed with the antibacterial ability through nano-silver and photocatalytic titanium dioxide, indoor sanitation is guaranteed, and a super-hydrophobic layer is constructed through the fluorosilane coupling agent.

The invention discloses a low-cost, large-quantity and efficient carbon dioxide curing method for a tailing filling body, which adopts a two-step carbon sequestration method and comprises the following steps of: firstly, grinding and screening a tailing raw material, and chemically exciting and activating; secondly, the activated tailings are subjected to first-step carbon sequestration through cooperation of a wet method and ultrasonic, and carbon sequestration tailings are prepared; then preparing a mine filling body by using the carbon sequestration tailings and cementing materials such as cement; and finally, through second-step carbon sequestration maintenance, the carbon sequestration filling body with the high carbon sequestration amount is obtained. The carbon sequestration in the first step can stimulate the carbonization and gelation activity of the tailings and increase the carbon sequestration amount on one hand, and nano calcium carbonate and silica gel formed in the prepared carbon sequestration tailings optimize the structural compactness of the filling body and improve various properties on the other hand. According to the carbon sequestration filling body prepared through the second step of carbon sequestration, the compressive strength of 3 days can reach 3 MPa or above, the compressive strength of 28 days can reach 5 MPa or above, the carbon sequestration amount can reach 13 wt.% or above, and the carbon sequestration filling body has the advantages of being simple in process, good in performance and low in cost.

A porous refractory in the K2O—SiO2—B2O3 system is formed by chemical direct foaming by heating to over 600° C., resulting in adherent black or white foam. The foam can function as highly porous thermal insulation, a high or low thermal emissivity surface, as a sealant for deteriorated refractory surfaces, as a filler for pockmarks / holes / gaps or as a bonding agent for parts with large gaps between them.

According to the mullite castable preparation method based on comprehensive utilization of the secondary aluminum ash nonferrous smelting slag, components are regulated and controlled by controlling the molar ratio of Al2O3 to SiO2, so that porous light mullite stably falls into a mullite phase region, and generation of excessive corundum phases is avoided. PMMA microspheres, corn flour, carbonized rice husks and SiO2 coated calcium carbonate composite pore-forming agent systems are adopted, and a layered slurry formula, gradient slip casting and segmented sintering processes are combined, so that the porosity and strength distribution are accurately regulated and controlled, and low-temperature sintering and amorphous phase change control are realized. By optimizing the grading of the porous light mullite aggregate and adding the homologous fine powder, the bonding strength and compressive strength of the castable are improved. And finally, the surface of the castable is coated with a compact mullite coating, so that the porosity is reduced, and the erosion resistance, corrosion resistance and stripping resistance are remarkably improved. The obtained castable has the advantages of light weight, high temperature resistance, high strength, low cost and excellent thermal stability and erosion resistance.

The invention belongs to the technical field of preparation of boron carbide ceramics, and particularly relates to a preparation method of high-purity porous boron carbide ceramics based on high-frequency induction heating, under the condition that a sintering aid is not added, a plunger is forced to move downwards due to volume expansion caused by CO2 generated by a melt, so that boron carbide powder is pressurized, the effect of hot pressing sintering can be achieved, and the effect of high-purity porous boron carbide ceramics can be achieved. The problems of low yield and high cost caused by the use of a hot-pressing sintering furnace can be avoided, the comprehensive performance of the prepared boron carbide ceramic can be improved, the process is easy to control, and the method is suitable for mass production of the boron carbide ceramic round rod for the high-temperature gas cooled reactor nuclear control rod; the prepared boron carbide ceramic has the advantages of pure phase, high porosity, uniform pore structure and stable mechanical property, especially has very good pore connectivity, and can ensure timely discharge of helium and improve the safety of the nuclear control rod when being used as a high-temperature gas cooled reactor nuclear control rod.

The invention discloses a preparation process of a fireproof lightweight thermal-insulation cement-based mortar material, which comprises the following steps: (1) placing porous lightweight aggregate in a sodium silicate solution for standing, and drying the obtained aggregate to obtain pretreated thermal-insulation aggregate; (2) uniformly mixing silica fume, calcium silicate powder, calcium hydroxide powder and water to form slurry; mixing the pretreated thermal insulation aggregate with the slurry, separating, airing the aggregate, and curing to obtain the primary thermal insulation aggregate. And (3) spraying water on the primary thermal insulation aggregate for wetting, then spraying ethanol containing a silane coupling agent, and airing to obtain the modified thermal insulation aggregate. And (4) uniformly mixing Portland cement, the modified thermal insulation aggregate, basalt fiber and a water reducing agent as raw materials, adding water, and uniformly stirring to obtain the mortar material. According to the invention, the water absorption rate of the porous lightweight aggregate is reduced, so that the adverse effect of the high water absorption characteristic of the aggregate on the mechanical properties of the mortar material is effectively reduced.

The invention relates to a porous TaC superhigh-temperature ceramic and a preparation method thereof. The specific first pore-forming agent and the specific second pore-forming agent are adopted, the first pore-forming agent comprises the metal simple substance and the carbon powder, the second pore-forming agent comprises the metal oxide capable of reacting with TaC, and the melting point of the metal simple substance is between 1495 DEG C and the melting point of the second pore-forming agent, so that the mechanical property of the ceramic and the effect of generating pores can be improved; various properties of the ceramic at high temperature are further improved; the weight ratio of the metal simple substance to the carbon powder to the metal oxide is 1: (0.2-5): (0.2-5), and the compact TaC porous ceramic with large porosity can be prepared on the basis of excellent crystallinity. The design not only ensures excellent crystallinity, but also enables the prepared TaC porous ceramic to have uniform porosity and a compact structure, is suitable for application in an extreme environment, and particularly shows excellent performance in an ultrahigh-temperature occasion.

In a first aspect, the present disclosure relates to a vapor deposition method of coating a carbonaceous substrate with a tantalum carbide coating, where the method includes a coating step. The coating step includes placing the carbonaceous substrate in a reaction chamber and heating the reaction chamber to a temperature between about 1100 DEG C and about 1500 DEG C for a duration of about 1 hour to about 24 hours. The coating step further includes supplying a process gas to the reaction chamber, where the process gas comprises a halide-containing species, and where the process gas comprises less than 4 atomic% carbon and less than 10 vol% H2 within at least 15 minutes after the start of the process. Further, the coating step includes supplying a tantalum-containing substance to the reaction chamber, or placing a tantalum-containing solid into the reaction chamber. Alternatively, the method includes placing a solid comprising a tantalum halide into the reaction chamber.

The invention relates to the technical field of building materials, and particularly discloses a lightweight high-strength waterproof gypsum board and a preparation method thereof, the lightweight high-strength waterproof gypsum board comprises alpha-type high-strength gypsum, phosphogypsum, gradient lightweight aggregate, hydrophobic fiber, temperature-sensitive waterproof capsule and the like. The preparation method comprises the following steps: preparing the hydrophobic fiber, the gradient lightweight aggregate and the temperature-sensitive waterproof capsule, dry-mixing the components, mixing the dry-mixed components with water to form slurry, and pouring and curing. Lightweight and high strength are realized through cooperation of the gradient lightweight aggregate and the hydrophobic fiber, and the temperature-sensitive waterproof capsule releases components to fill pores during curing, so that the problem of insufficient early-stage waterproof performance is solved; the prepared gypsum board has the advantages of light weight, high strength, good waterproofness and durability.

The invention provides fly ash unfired ceramsite and a preparation method thereof. The fly ash unfired ceramsite is prepared by the following steps: granulating to obtain a ceramsite matrix, then carrying out secondary pelletizing to construct a shell structure, and carrying out composite curing. The ceramsite matrix is prepared from fly ash, cement, gypsum, an alkali activator and water; the shell is made of coal ash and cement. According to the invention, the problems of few reaction products and low strength of the fly ash unfired ceramsite caused by insufficient activity of fly ash are solved, and the technical problem of low granulation efficiency of the fly ash unfired ceramsite caused by difficulty in accurate control of a traditional water adding mode for granulation is solved. In addition, the problems of poor initial structural stability and durability of conventional unfired ceramsite are solved, so that the problem that when the fly ash unfired ceramsite is applied to the field of concrete, the mechanical property of the fly ash unfired ceramsite is weak is solved.

The invention relates to the technical field of concrete, and particularly discloses ultralow-density foam concrete and a preparation method thereof. The ultralow-density foam concrete is prepared from the following raw materials in parts by weight: 35 to 60 parts of cement, 15 to 25 parts of steel slag, 8 to 15 parts of lightweight aggregate, 1 to 3 parts of reinforced fiber, 0.5 to 1 part of a foaming agent, 0.1 to 0.3 part of a stabilizer, 0.3 to 0.5 part of a foaming aid and 30 to 70 parts of water, the foaming aid is at least one of aluminum powder, silica fume, calcium stearate and triethanolamine, and the foaming agent is one of an animal protein foaming agent and a rosin foaming agent; the foaming agent and the foaming aid are combined, a stable foam structure is formed in a concrete system, meanwhile, the phenomena of foam merging and foam breaking are reduced, formation of communicating holes is reduced while the foam hole structure is refined, the stability of foam concrete bubbles is improved, and foam collapse is reduced.

The invention relates to the technical field of honeycomb ceramic materials, in particular to a cordierite honeycomb ceramic material with low heat capacity and high specific surface area and a preparation method thereof. The pug comprises an inorganic solid component, an organic component and water, the inorganic solid component comprises narrow-particle-size-distribution spherical magnesium hydroxide, spherical aluminum hydroxide and spherical fused silicon dioxide; the particle size D50 of the narrow-particle-size-distribution spherical magnesium hydroxide powder is 0.1-2 microns, and the particle size D97 is smaller than or equal to 20 microns; the particle size D50 of the spherical aluminum hydroxide powder is 1-6 [mu] m, and the particle size D97 is less than or equal to 20 [mu] m; the particle size D50 of the spherical fused silica powder is 6-12 [mu] m, the particle size D97 is less than or equal to 20 [mu] m, and the sphericity is greater than or equal to 98%. The method is low in extrusion pressure, the obtained material is high in pore density, meanwhile, high porosity can be achieved without adding a pore-forming agent, and the ultra-thin wall is achieved; the composite material can be applied to various requirements of low heat capacity and high specific surface area.

A manufacturing method for a special ceramic cup for producing low-hertz water by soaking, comprising: manufacturing a single composite cup body (100) of a ceramic cup and manufacturing a double composite cup core (200) of the ceramic cup. The special ceramic cup is composed of the single composite cup body (100) and the double composite cup core (200). The single composite cup body (100) uses a composite layer, a single composite cup body outer layer (110) is made of purple clay, and a single composite cup body inner layer (120) is made of kaolinite; and the double composite cup core (200) uses loess stone powder and muyu stone powder as a double composite cup core outer layer (210), and uses diatom minerals and a maifan stone porous material as a double composite cup core inner layer (220). The manufactured special ceramic cup can produce small molecule water by means of the composite superposition effect, can provide a new option for people to select low-hertz water and trace element health-care products for daily supplementation, and has important application value.

The invention relates to layered bodies made of LiSICon material, their production, and use. The underlying objective was to provide a membrane for the deposition of lithium from contaminated lithium-containing water that is comparatively inexpensive and offers good lithium permeability during electrodialysis. This objective is achieved by coating a substrate with a LiSICon material using aerosol-based cold deposition. This process yields a layered body that, due to its specific material combination, is ideally suited as a membrane for electrodialytic lithium deposition.

The invention discloses a gasoline engine particle trap with low back pressure amplification and narrow pore size distribution and a preparation method thereof, and belongs to the technical field of gasoline engine tail gas emission treatment. The preparation method comprises the following steps: mixing an inorganic raw material, a pore-forming agent, a binder and water to prepare a pug, carrying out pugging, extrusion molding, microwave drying and high-temperature sintering to prepare a ceramic matrix, and carrying out pore plugging and catalyst coating on the ceramic matrix to prepare the gasoline engine particle trap. Wherein the median particle size D50 of a mixture formed by mixing the inorganic raw materials, the pore forming agent and the binder is controlled to be within the range of 20-26 microns, the span (D90-D10) / D50 is smaller than 1.4, and the gasoline engine particle trap with the back pressure amplification being 13-56% is obtained. According to the method, the pore size distribution condition of the ceramic matrix can be pre-judged in actual production, so that particle distribution adjustment of raw materials is carried out, and the pore size consistency of gasoline engine particle traps produced in batches is guaranteed.

The invention discloses a preparation method of a photocuring 3D printing silicon carbide porous ceramic membrane, which comprises the following steps: preparing silicon carbide slurry by using silicon carbide powder and photosensitive resin as raw materials, obtaining a ceramic membrane green body by using a photocuring 3D printing forming process, and then obtaining the silicon carbide porous ceramic membrane through a glue discharging-sintering process. By regulating and controlling the components of the photosensitive resin and the silicon carbide powder in the slurry, the slurry shows relatively high curing depth and relatively low curing width, and a high-precision ceramic membrane green body is successfully prepared; meanwhile, by changing the solid content of the slurry and the particle size of silicon carbide particles, the pore structure of the silicon carbide porous ceramic membrane is regulated and controlled, and the prepared ceramic membrane is uniform in pore structure. The silicon carbide porous ceramic membrane is prepared through photocuring 3D printing, the problems that silicon carbide slurry is difficult to photocure, low in precision and the like are solved, the preparation process is simple, the forming rate is high, and an effective way is provided for preparing the silicon carbide porous ceramic membrane in a complex shape.