480results about How to "Uniform distribution of pores" patented technology

The invention relates to a preparation method of a nanometer zirconia heat barrier coating which is mixed with rare-earth oxide and used for liquid-phase plasma spraying. The method comprises that precursor sol is used as a spraying raw material, atomized into fine liquid drops under atomized gas pressure, sent into plasma flame flow and sprayed and deposited on a matrix to obtain the nanometer zirconia heat barrier coating. The precursor sol is hydroxid precursor sol. According to weight proportion, the raw material includes 63 to 73 percent of ZrOCl2.8H2O and 27 to 37 percent of crystalline-state stabilizer oxide which is rare earth oxide. The invention can overcome the problems of poor sol distribution, poor sol flowing performance, chlorid ion erosion, poor sol granule atomizing effect, uneven granule sizes, and the like in the the traditional liquid-phase plasma spraying process. In the invention, a composite coating is prepared, and has the advantages of high depositing efficiency, low cost, wide spraying material, strong adaptability of the liquid-phase precursor, low heat conductivity, good heat and shock resistance, and the like.

The invention relates to a metal/carbon nano composite porous membrane and a preparation method thereof. The method comprises the following steps: a) adding a metal salt and a polymer, which can be pyrolyzed into carbon in an inert atmosphere, into an ammonia water solution, continuously stirring to obtain a uniform sol, and continuing stirring the uniform sol until the sol is pregelated into a pulp; b) applying the pulp obtained in the step a) onto the surface of a solid substrate, and drying to obtain a coating; and c) carrying out heat treatment on the coating obtained in the step b), thereby obtaining the metal/carbon nano composite porous membrane on the surface of the solid substrate.

This invention relates to a method for preparing porous spinel ceramic material. The method comprises: (1) mixing magnesite powder 10-90 wt.%, Al(OH)3 powder 10-90 wt.%, water 2-10 wt.% and adhesive 0-3 wt.%; (2) molding; (3) drying the green bodies at 110 deg.C for 4-24 h; (4) sintering at 1600-1800 deg.C, and keeping the temperature for 1-8 h. The porous spinel ceramic material mainly contains MgO and Al2O3, and has main crystal phase of periclase-spinel, spinel or spinel-corundum. The porous spinel ceramic material can be directly contacted with flame retardant magmesium and spinel materials, and is a lightweight heat-insulating flame retardant with uniform pore distribution and high strength.

The invention discloses porous high-entropy alloy and a preparation method thereof and belongs to the field of porous foam metal. The preparation method of the porous high-entropy alloy specifically comprises the steps that high-entropy alloy powder and screened pore-forming agents are mixed proportionally according to the requirements for the porosity and the pore size, and the high-entropy alloy powder and the screened pore-forming agents are sintered through spark plasma sintering (SPS) directly after being uniformly mixed by a blender mixer; after sintering is completed, a sintered sample is put into deionized water to be subjected to ultrasonic cleaning, and particles of the pore-forming agents are removed by using the characteristic that the pore-forming agents are soluble in water; and finally the porous high-entropy alloy is obtained. The preparation method is simple in process, particularly, the preparation time is shortened greatly through the SPS method, and the efficiency is improved. The prepared porous high-entropy alloy has the characteristics of being high in porosity, uniform in pore size distribution, controllable in porosity and pore size and the like and has potential application prospects in the fields of biology, petroleum, metallurgy, chemical industry and the like.

The invention relates to Periclase-olivine light thermal-insulated fireproof materials and method for preparation, which comprises mixing 20-80% magnesite powder, 0-50 wt% of magnesium oxide powder, 10-30% of silicon oxide powder, 0-15% of combustible powder, 0-3% of anchoring agent, and 4-10% of water, mixing homogeneously, press forming, drying the formed blank 4-24 hours at 110 deg. C, then burning at 1300-1500 deg. C, thermally insulating 1-8 hours.

The invention is a method for preparing multiporous glass composite with ironstone gangue, adopting two steps: 1. adopting iron gangue, bauxite, calcium carbonate and waste glass as raw materials to prepare basic glass powder, crushing and finely grinding the iron gangue, and batching the iron gangue 48-65wt%, bauxite 5-9wt%, calcium carbonate 10-20wt%, and waste glass 15-30wt%; mixing them uniformly, melting and baking, water- quenching and grinding and finally obtaining the glass powder; 2. preparing multiporous glass ceramic materials, and adding in calcium carbonate in 1-5wt% of the basic glass, sodium phosphate in 6-10wt% of the basic glass, anhydrous sodium carbonate in 1-3wt% of the basic glass and borax in 1-6wt% of the basic glass, grinding and mixing them, and moulding and obtaining raw blanks, sintering the raw blanks at high temperature and cooling to normal temperature and finally obtaining the products. And the products have bulk densities of 1.5-2.8 g/cm3, normal- temperature tensile strength of 32-60 MPa and are good heat- insulating materials.

The invention relates to a novel spinel permeable and anti-clogging tundish upper nozzle and a production method thereof. An inner wall of the spinel permeable tundish upper nozzle is made of permeable spinel, an outer wall is made of a common alumina-carbon material, and a gas passage is provided between the inner wall and the outer wall and is communicated with a gas inlet hole at an upper surface of a base. A burning schedule is controlled to cause air porosity of a spinel liner formed at high pressure to meet argon blowing requirements and to cause the spinel liner to be subject to secondary forming with outer wall materials and an argon passage to be reserved. The permeable and anti-clogging tundish upper nozzle made by the method can meet the argon blowing requirements, and the spinel liner has functions of blowing argon, anti-clogging and resisting.

The invention discloses coating slurry for bonding a lithium battery separator and a pole piece and a preparation method of the coating slurry. The coating slurry coats the lithium battery separator or the pole piece to bond the lithium battery separator and the pole piece, and then is dried; pores are formed in a coating; and the coating slurry is prepared from the following components in parts by weight: 1-10 parts of a pore-forming agent, 1-20 parts of inorganic particles and 3-10 parts of a binder. Uniform distribution of coating pores is achieved through gas release in the high-temperature drying process; and the phenomenon that the slurry blocks a base in the surface coating process of the coating can be effectively avoided, so that the problem that the properties of rate cycle performance and the like are affected due to large internal resistance when the gummed separator or other gummed pole piece is applied to a lithium-ion battery is solved.

The invention discloses a preparation method of styrene macroporous strong-alkaline anion exchange resin for removing nitrate in water. Styrene, divinyl benzene, benzoyl peroxide, liquid paraffin, polyvinyl alcohol, gelatin, methylene blue, dichloromethane, 1,4-bis(chloromethoxy)butane, anhydrous tin tetrachloride and triethylamine are used as main raw materials; the macroporous strong-alkaline anion exchange resin is prepared through suspension polymerization reaction, chloromethylation reaction and amination reaction. The preparation comprises the following steps: synthesis of styrene divinyl benzene cross-linked polymer by the suspension polymerization method, chloromethylation reaction of styrene divinyl benzene cross-linked polymer, and amination reaction of chloromethylated styrene divinyl benzene cross-linked polymer. The particle size of the prepared resin is 0.5-1.5mm; the resin has the advantages of uniform pore distribution, strong adsorbability against nitrate, high selectivity on nitrate and the like; the physicochemical properties of the resin are good. The resin can be applied to the nitrate removal treatment process of water, and has good development prospect and practical significance.

An elastomer laminate has an elastomer carrier layer composed of a thermoplastic elastomer, and at least one microtextured cover layer composed of a polymer that has a lower elasticity than the material of the carrier layer. The microtexture is produced by stretching the laminate beyond the elasticity limit of the cover layer and elastic recovery of the stretched laminate. The microtextured cover layer contains a plurality of pores.

The invention discloses a porous mullite ceramic material and preparing method, which comprises the following steps: dispensing 10-50 percent coal gangue powder, 50-90 percent Al (OH) 3, 2-10 percent water and 0-10 percent addictive; stirring; moulding; drying the mould at 110 deg.c for 4-24 h; sintering at 1400-1600 deg.c for 1-8 h. The chemical component of product is SiO2 and Al2O3, wherein the main crystal phase is mullite or mullite-alumina, which can be high-strength and light-quality insulating flame-proof material.

The invention discloses a copple with an Y2O3 erosion-resistant coating and a method for preparing the Y2O3 erosion-resistant coating with a slip casting moulding process. The copple with the Y2O3 erosion-resistant coating is formed by preparing an Y2O3 erosion-resistant sizing agent on the inner wall of the copple base with the slip casting moulding process, forming the Y2O3 erosion-resistant coating with depth from 0.5 mm to 8 mm. The Y2O3 erosion-resistant sizing agent is obtained by evenly mixing multilevel Y2O3 raw material powder, dispersant, adhesive and deionized water. The copple with the Y2O3 erosion-resistant coating has melting temperature from 1600 DEG C to 2000 DEG C, thereby being capable of meeting melting of high-activity metal alloy such as Ti alloy, Nb alloy, rare earth alloy and alloy with high-activity elements of Ti, Al, Nb, Hf, rare earth, and the like.

The invention discloses a preparation method for a composite crosslinked absorbent for waste water treatment, which comprises: firstly, preparing solution of biological macromolecular material; secondly, heating to dissolve polyvinyl alcohol (PVA), and uniformly mixing the solution of PVA, the solution of biological macromolecular material and mineral powder; thirdly, adding the mixed solution into solution of boric acid to perform immobilized crosslinking, and after crosslinking is finished, washing and drying an immobilized material to obtain the composite crosslinked adsorbent. The method has the advantages of simple and quick process, low cost, economy, applicability and the like. The crosslinked absorbent contains rich active groups and porous structures and has high stability, good absorbing effect and wide application range. The crosslinked absorbent can be widely used for treating waste water.

The present disclosure relates to a catalyst having metal catalyst nanoparticles supported on natural cellulose fibers and a method of preparing the same, whereby natural cellulose fibers are subjected to specific pretreatment to increase a surface area and form defects on the surface thereof and metal catalyst nanoparticles are then supported on the cellulose catalyst support in a highly dispersed state, thereby providing improved catalysis while allowing production of the catalyst at low cost. The catalyst may be utilized for various catalytic reactions.

The invention discloses a porous oil-containing polyimide composite material for an ultrasonic motor and belongs to the field of motor material preparation. The porous oil-containing polyimide composite material comprises, by mass, 60-80% of polyimide, 10-20% of carbon fibers and 10-20% of graphite. The porous oil-containing polyimide composite material has uniform aperture distribution, a stable friction coefficient, a very low wear rate and a good continuous lubrication capability, satisfies requirements on rotary ultrasonic motor stator and rotor friction, has a rated rotating speed greater than 80r/min, realizes long-term use of a rotary ultrasonic motor by a thin and uniform lubricating film formed on the contact surface and greatly prolongs a service life of the ultrasonic motor. The invention also provides a preparation method of the porous oil-containing polyimide composite material for an ultrasonic motor.

The invention relates to a ferrite nanometer superstructure porous material and a method for preparing the same, in particular to a method for preparing a nickel ferrite, cobalt ferrite or zinc ferrite nanometer superstructure porous material. The preparation method comprises that: sodium oxalate is used as a precipitator, the soluble nickel, cobalt or zinc salt used as a raw material reacts with the soluble iron salt to prepare a precursor of oxalate, and the precursor is degraded by calcination at certain temperature to obtain the nickel ferrite, cobalt ferrite or zinc ferrite nanometer superstructure porous material. The nickel ferrite, cobalt ferrite or zinc ferrite nanometer superstructure porous material synthesized by the method has the advantages of high purity, uniform size, good dispersibility, mild reaction conditions, simple equipment, easily controlled process conditions and low cost, and meets the need of the actual production.

The invention relates to a method for preparing a pitch-based foam carbon. The method comprises the following steps of: 1) mixing mesophase pitch with mesophase carbon micro sphere based on a mass ratio of 60 to 90:10 to 40, putting the mixture in a reactor, 2) guiding nitrogen to the reactor, rising temperature to 280-350 DEG C, maintaining for 1 to 2 h, rising temperature to 450-650 DEG C, maintaining for 2 to 4 h so as to obtain pitch-based foam carbon raw material, 3) rising temperature to 950-1050 DEG C, maintaining for 2 to 3 h, performing carbonization treatment under the protection of positive pressure nitrogen so as to obtain the carbonized pitch-based foam carbon base, and 4) based on a ratio of propylene to nitrogen of 1:1-2 under a pressure lower than 3kPa at 850 to 1000 DEG C, heating the carbonized pitch-based foam carbon base for 15 to 80 h so as to obtain the pitch-based foam carbon. The volume density of the pitch-based foam carbon prepared by using the method of the invention is 0.64-0.85 g/cm3 and the compression strength is 25.8-47.2 MPa. The pitch-based foam carbon can be wildly applied to carbon-base compound material, light structure material, catalyst carrier material, and the like.

The invention discloses a 3D printing manufacturing method and equipment for a porous three-dimensional part. The method comprises the steps that a forming sizing agent comprising liquid photosensitive resin and a polymeric liquid additive is prepared, the liquid photosensitive resin can be cured through ultraviolet irradiation, and the polymeric liquid additive comprises a binder component and is provided with an electric conductor; the surface of a receiving substrate is coated with a layer of soluble polymeric powder; the sizing agent is sprayed to the receiving substrate according to a set program in an electrostatic spraying mode to form a layer of patterns; the sizing agent patterns on the receiving substrate is subjected to ultraviolet irradiation for curing; the cured sizing agent patterns are coated with another layer of the soluble polymeric powder, then sizing agent spraying and curing are conducted again, and the sizing agent and the soluble polymeric powder are overlaid layer by layer in this way to obtain a formed three-dimensional part; the formed three-dimensional part is cleaned through solvent and/or steam of the solvent, the soluble polymeric powder in the three-dimensional part is dissolved, pores are formed, and accordingly the porous three-dimensional part with the evenly distributed pores is obtained.

A structural insulated panel, which includes a carbon foam core having a high ratio of compressive strength to density, desirable fire retardant properties, and resistance to environmental stress. The carbon foam structural insulated panel also includes a first layer and a second layer bound to a first surface and second surface of the carbon foam core. Applications of the carbon foam structural insulated panel include structural and fire retardant elements of residential and commercial buildings, aircraft and also watercraft.