810 results about "Aluminium powder" patented technology

The invention relates to the technical field of flux-cored wires. The preparation method comprises the following steps: weighing the following raw materials in parts by weight: 4-6 parts of chromium carbide powder, 7-9 parts of molybdenum powder, 6-8 parts of nickel powder, 10-15 parts of niobium powder, 15-18 parts of tungsten carbide powder, 7-11 parts of a modified titanium carbide agent, 5-8 parts of a blending agent added based on boron and 2-4 parts of 30-mesh natural graphite; 1-2 parts of sodium fluosilicate; 1-2 parts of aluminum powder; and 70-75 parts of iron powder. The flux-cored wire can adapt to complex service environments of parts such as rollers and continuous casting crystallizers in the metallurgical industry, the service life of the parts subjected to surfacing repair is prolonged, the production efficiency of the parts subjected to surfacing repair is improved, the obtained flux-cored wire achieves balance of high-temperature performance, mechanical performance and low-temperature stability, and the comprehensive applicability of products is improved.

The invention discloses a method for preparing a light-transmitting gradient multicolor zirconium oxide material through photocuring, which comprises the following steps: preparing modified aluminum oxide which is formed by attaching a strontium element and a chromium element to the surface of aluminum oxide; preparing bottom-layer slurry, middle-layer slurry and upper-layer slurry from the zirconium-aluminum powder; the bottom layer slurry comprises zirconium aluminum powder and a coloring agent; the middle layer slurry comprises zirconium-aluminum powder, a light-transmitting auxiliary agent and a coloring agent; the upper-layer slurry comprises zirconium-aluminum powder, a light-transmitting auxiliary agent and a coloring agent; preparing a bottom layer green body by using the bottom layer slurry through 3D printing by using the photocuring slurry, preparing a middle layer green body on the surface of the bottom layer green body by using the middle layer slurry, and preparing an upper layer green body on the surface of the middle layer green body by using the upper layer slurry, so as to obtain a zirconium oxide material green body; the light-transmitting gradient multicolor zirconia material with gradient light transmission and gradient color is directly prepared through 3D printing, the color of the light-transmitting gradient multicolor zirconia material is closer to that of real teeth, and the strength and toughness are not reduced.

The invention relates to the field of architectural ceramics, and discloses a tile with a flash and matte composite effect, which sequentially comprises a green body layer, a matte glaze layer, a pattern layer and a flash layer from bottom to top, the glossiness of the matte glaze layer is less than 6GU; the preparation raw materials of the flash layer comprise flash particles, and the flash particles comprise the following components in parts by weight: 60-80 parts of mica titanium pearl powder, 10-20 parts of coating aluminum powder and 5-10 parts of glass beads; and the particle size of the flash particles is 50-250 microns. According to the invention, the matte glaze is combined with the flash particles, the matte glaze provides a soft and convergent substrate, the flash particles form local and bright reflection points on a matte background, and the matte glaze and the flash particles are distinct in contrast and set off each other, so that the matte high-grade texture is kept, and the flexible flash bright points are added; and the complex aesthetic feeling of coexistence of a matte substrate and mineral crystal flash in natural stone is simulated to the greatest extent.

The invention discloses a circulation system of aluminum wire drawing liquid, and relates to the technical field of metal processing, the circulation system comprises: a wire drawing device, which is provided with an immersion liquid box and an outlet die, and after entering the immersion liquid box for drawing, an aluminum rod is sized from the outlet die for molding; a filter is arranged in the wire drawing liquid pool, the filter is communicated with the immersion liquid box through a circulating pipe I, the circulating pipe I is connected with a heat exchanger, and the immersion liquid box is communicated with the wire drawing liquid pool through a return pipe; the cooling system is connected with the heat exchanger through a circulating pipe II; the filter is provided with at least one continuous filtering mechanism, and the continuous filtering mechanism is configured to trigger the continuous filtering mechanism to rotate to switch a new filtering structure when the water level in the filter rises. After the water-based aluminum wire drawing liquid is adopted, no smell is generated in the circulation process, and the surrounding environment of a machine table is clean and tidy. Meanwhile, after the aluminum powder is filtered and is drawn by a nano-mold, the lubricating property is good, and the surface of the aluminum wire is smooth and clean.

The invention provides silicon nitride and aluminum nitride powder and a preparation method, and relates to the technical field of ceramic powder. The preparation method of the silicon nitride and aluminum nitride powder comprises the following steps: mixing aluminum powder and aluminum nitride raw powder to obtain a first mixture; mixing silicon powder, silicon nitride raw powder and ammonium salt to obtain a second mixture; paving the first mixture and the second mixture in a material frame padded with a carbon felt, and separating the first mixture from the second mixture by using the carbon felt; the material frame is placed in a self-propagating reaction kettle, nitrogen is introduced after vacuumizing, and the first mixture is ignited so as to induce a combustion synthesis reaction of the second mixture; and after the combustion synthesis reaction, cooling to room temperature, releasing the pressure in the self-propagating reaction kettle, taking out a synthetic product, and grinding the synthetic product to obtain silicon nitride powder and aluminum nitride powder. The purity of the powder material can be improved.

The invention discloses a quick-curing high-temperature-resistant anticorrosive coating for two-component packaging and a preparation method of the quick-curing high-temperature-resistant anticorrosive coating. The component A of the coating is composed of novolac epoxy resin, epoxy resin, a reactive diluent, an auxiliary agent, an anti-rust pigment, a filler, aluminum powder and a solvent; and the component B consists of phenolic aldehyde amine, alicyclic amine and a solvent. Compared with a traditional phenolic epoxy coating, the product has the advantages of being high in single-time film forming thickness, rapid in curing, resistant to abrasion, high in thermal stability, resistant to cold and hot impact, resistant to corrosion and the like.

The invention relates to the technical field of floor slab concrete, and discloses aerated concrete applied to sound insulation and heat preservation of a floor slab and a preparation method of the aerated concrete aiming at the problems that an existing sound insulation floor slab containing the aerated concrete is poor in structural stability, namely the sound insulation effect and the long-term effect of mechanical properties are poor and the like. Comprising 30-40 parts of fly ash, 25-35 parts of sand, 15-20 parts of ardealite, 10-15 parts of quick lime, 5-8 parts of silicon-aluminum porous microspheres, 3-5 parts of slaked lime, 1-2 parts of Fe3O4-polypropylene fiber and 0.2-0.5 part of aluminum powder. The preparation method of the silicon-aluminum porous microspheres comprises the following steps: mixing a silicon source, an aluminum source and a surfactant, and uniformly stirring to obtain silicon-aluminum homogenate; and adding nano titanium dioxide, carrying out ultrasonic dispersion and freeze drying, transferring into a heating furnace, and heating and calcining to obtain the silicon-aluminum porous microspheres. The supporting and strengthening effects on pores are realized through gas production reaction and the like in the material, so that the structural strength and durability of the aerated concrete are improved.

A high-thermal-conductivity phase change sheet and a preparation method therefor. The high-thermal-conductivity phase change sheet is prepared from the following raw materials in parts by mass: 3-5 parts of a resin, 80-100 parts of a thermally conductive filler, 0.1-1 part of a treating agent, 0.1-1 part of an antioxidant, and 1-2 parts of a phase change material, wherein the resin is low-molecular-weight polyisobutylene, the thermally conductive filler comprises aluminum powder of 10 μm, aluminum powder of 2 μm and zinc oxide of 0.2 μm, and heat treatment and vacuumizing operation are involved in the preparation process.

The invention provides multi-structure-layer flaky silver-coated aluminum powder, a preparation method of the multi-structure-layer flaky silver-coated aluminum powder and a conductive rubber material. The multi-structure-layer flaky silver-coated aluminum powder comprises flaky aluminum powder, a silicon dioxide layer and a silver layer, the silicon dioxide layer is coated on the surface of the flaky aluminum powder, and the silver layer is coated on the surface of the silicon dioxide layer. According to the multi-structure-layer flaky silver-coated aluminum powder, the preparation method thereof and the conductive rubber material, the multi-layer composite structure design of aluminum core-silicon dioxide layer-silver layer is adopted, the problems that aluminum powder is poor in stability and silver is prone to migration are solved, and the multi-structure-layer flaky silver-coated aluminum powder has the advantages of being low in cost and resistant to shearing; therefore, the novel white conductive filler with high performance, high stability and high applicability is obtained.

The invention provides a method for synthesizing aluminum nitride fibers by preheating combustion, which comprises the following steps: preheating aluminum powder and aluminum nitride serving as raw materials in a low-pressure nitrogen environment, and then inducing a combustion synthesis reaction to prepare the aluminum nitride fibers with the average diameter of 0.3-0.8 mu m and the average length of 400-800 mu m. The preparation method has the characteristics of simple process, low preparation cost and the like, and the prepared aluminum nitride fiber can be used as a high-thermal-conductivity filler for electronic packaging.

The invention discloses a high-performance electrode foil and a sintering process thereof. The sintering process comprises the following steps: carrying out hydration treatment on an aluminum-containing interlayer foil to obtain a hydrated interlayer foil; winding the base layer foil and the hydrated interlayer foil at intervals to form a foil roll; and sintering the foil roll. The adopted interlayer foil is the aluminum-containing interlayer foil, and when the aluminum-containing interlayer foil is subjected to hydration treatment, hydrated aluminum hydroxide can be formed on the surface of the aluminum-containing interlayer foil; when sintering is carried out, on one hand, hydrated aluminum hydroxide on the surface of the hydrated interlayer foil can be decomposed, generated water can react with aluminum powder on the surface of the base layer foil at a high temperature, aluminum oxide and hydrogen are generated, and therefore the purposes of promoting the aluminum powder on the surface of the base layer foil to generate aluminum oxide and promoting the sintering process are achieved, and aluminum powder oxidation is more uniform; and on the other hand, generation and decomposition of aluminum hydroxide can cause a large number of pores to be generated in the interlayer foil, so that the adhesive gasified from the base layer foil is better adsorbed, adhesive discharging is more complete, and improvement of the performance of the electrode foil is facilitated.

The invention relates to a water-based ball-milled passivated aluminum paste and a preparation method and application thereof, and the preparation method comprises the following steps: carrying out ball milling on aluminum powder, a surface modifier, a hydrophilic solvent and an inorganic passivator until the target particle size of the aluminum powder is reached, and obtaining preliminarily passivated aluminum paste; carrying out suction filtration on the primarily passivated aluminum paste, uniformly stirring and mixing, adding an organic passivator, continuously stirring to carry out a passivation reaction, adding an auxiliary agent, and continuously stirring to obtain aluminum paste; wherein the organic passivator is a combination of a micromolecular organic passivator and a macromolecular organic passivator. According to the method, the in-situ passivation technology is adopted, the aluminum sheet is passivated in the extension process, the influence of dissolution and auxiliaries on the aluminum sheet is small, a more compact protective film is formed through the synergistic effect of the inorganic passivator and the organic passivator and through the oxidation film layer, chelation and precipitation reaction, corrosion of aluminum powder is greatly inhibited, and the service life of the aluminum sheet is prolonged. And the water-based passivated aluminum paste and a water-based resin system maintain good compatibility, and can show good glossiness.

The invention provides a preparation method and application of ceramic slurry for high-temperature bonding of aluminum nitride ceramics, and relates to the technical field of high-temperature ceramic materials.The preparation method comprises the following steps that firstly, an organic carrier is prepared, a polymer binder, an organic solvent, a plasticizer and a dispersing agent are weighed according to the weight ratio and stirred at the temperature of 60-70 DEG C till complete dissolution and clarification are achieved for use; 2, an inorganic functional phase is prepared, aluminum nitride powder, yttrium oxide powder and alkaline earth metal oxide powder are weighed according to the weight proportion and placed in a ball milling tank to be evenly mixed, the obtained ceramic slurry serves as a bonding layer, the tolerable temperature can reach 1000 DEG C or above and is far higher than that of metal brazing filler metal, and the ceramic slurry is suitable for severe environments such as aerospace and high-temperature sensors. The main components of the bonding layer are consistent with the base material, and the thermal expansion coefficient is highly matched, so that the thermal stress can be greatly relieved, and the failure of the device caused by thermal fatigue in the temperature cycle is avoided.

The preparation process comprises the following steps: uniformly mixing 80-90 parts by mass of fused mullite, 1-2 parts by mass of modified ZrSiO4 fine powder, 5-8 parts by mass of alpha-Al2O3 fine powder, 2-4 parts by mass of silicon powder, 3-5 parts by mass of aluminum powder and 3-5 parts by mass of mullite microsphere powder, adding 5-8 parts by mass of a binding agent, and uniformly mixing to obtain pug; the preparation process of the mullite microspheres comprises the following steps: mixing bauxite, feldspar and silica powder, adding water, grinding into slurry, carrying out spray drying, sintering, and rapidly cooling after sintering; the pug is sealed and stacked for 12-24 h and then subjected to high-pressure forming, and a blank is obtained; and gradually heating the blank to 120 DEG C, drying for 24-48 hours, and firing and molding. The ultralow-porosity anti-erosion brick is low in porosity and good in anti-erosion performance.

The invention relates to the technical field of refractory materials, in particular to a method for producing magnesia carbon bricks from low-carbon reduced magnesia. The method comprises the following steps: respectively weighing 80-90 parts by weight of magnesia, 3-5 parts by weight of a function enhancer, 1-3 parts by weight of aluminum powder, 0.3-1 part by weight of aluminum nitride, 2-3 parts by weight of carbon black, 3-5 parts by weight of crystalline flake graphite and 3-5 parts by weight of phenolic resin for later use; mixing the magnesite except the fine magnesite with phenolic resin, uniformly mixing, adding the rest raw materials, uniformly stirring at a low speed, adding the fine magnesite, and uniformly stirring at a high speed to obtain mixed slurry; and injecting the mixed slurry into a prepared mold, and sequentially carrying out compression molding and heat treatment to obtain the magnesia carbon brick. The magnesia carbon brick produced by the invention not only has excellent mechanical properties, but also has excellent thermal shock resistance stability and oxidation resistance; the quality of the produced magnesia carbon brick is effectively guaranteed, and meanwhile the service life of the magnesia carbon brick is prolonged to a certain degree.

The invention belongs to the technical field of aluminum alloy grain refiners, and particularly relates to a grain refiner and a preparation method and application thereof.The preparation method of the grain refiner comprises the following steps that S1, aluminum powder, vanadium powder, boron powder and lanthanum powder are obtained; s2, after uniform mixing, vacuum ball milling is performed to obtain first powder, and the first powder is sieved to obtain second powder; s3, pressing the second powder to obtain a metal cake; s4, sintering the metal cake in an inert gas atmosphere to obtain a grain refiner; the Al-V-B-La refiner is prepared through a sintering method, the distribution condition of a second phase in the grain refiner and the grain refining effect of the grain refiner are improved through the rare earth element La, the VB2 phase in the grain refiner with the La element added is more uniform in distribution, smaller in size and larger in number density, more second phases can play a role in refining, and the grain refining effect of the grain refiner is improved. And the problem that the refining efficiency is low due to the Si poisoning problem of a traditional grain refiner is solved, and therefore the better aluminum alloy grain refining effect is achieved.

This application discloses a method for producing an anticorrosion coating having excellent adhesion to rusted, low-treatment surfaces, which relates to the field of paint chemical industry. The anticorrosion coating comprises Component A and Component B, where Component A comprises an epoxy resin, double-coated hollow glass microbeads, a thixotropic agent, a wetting and dispersing agent, a pigment, barium sulfate, talc, Solvent A, an antifoaming agent, a first silane coupling agent, and an aluminum powder paste, and Component B comprises a curing agent, an accelerator, and Solvent B.

The invention discloses a preparation method of high-purity aluminum nitride single crystal powder. The method comprises the following steps: uniformly mixing raw materials aluminum powder and aluminum nitride powder according to a ratio, putting the mixture into an air pressure sintering furnace, vacuumizing, introducing high-pressure argon, heating to a set temperature, introducing nitrogen, carrying out a fire blast reaction, cooling to room temperature, and crushing to obtain the high-purity aluminum nitride single crystal powder with D50 of 20-200 microns. According to the method, the synthesis of the coarse-particle high-purity aluminum nitride single crystal powder is realized by utilizing the rapid nitridation explosion reaction of the aluminum powder in the high-temperature and high-pressure nitrogen, the method has the characteristics of simple process and low preparation cost, and the prepared high-purity aluminum nitride single crystal powder can be used as a high-thermal-conductivity filler for electronic packaging.

The invention relates to a low-loss FeSi-CIP composite soft magnetic powder core and a preparation method thereof. The adopted raw material powder is composed of amorphous nanocrystalline atomized FeSi series powder and filling powder composed of carbonyl iron powder and iron-silicon-aluminum powder. The carbonyl iron powder accounts for 15-25% of the mass of the raw material powder, the iron-silicon-aluminum powder accounts for 5-15% of the mass of the raw material powder, and the filling powder accounts for 25-35% of the mass of the raw material powder. Two-stage warm-pressing pressing is adopted, self-tempering is achieved to a certain extent at the specific warm-pressing temperature, and high direct-current bias performance and low iron loss can be obtained without heat treatment annealing after pressing forming. The effective magnetic conductivity of the powder core is 42 or above, the loss is as low as 350 mW / cm < 3 > (50 mT, 100 kHz), and the direct current bias performance under the external field of 100 Oe reaches 90% or above.

The invention relates to the technical field of high polymer materials and protective coatings, and discloses a single-layer anti-ultraviolet heavy-duty powder coating as well as a preparation method and application thereof. The preparation method of the single-layer anti-ultraviolet heavy anti-corrosion powder coating comprises the following steps: adding carboxyl polyester resin, triglycidyl isocyanurate, modified nano silicon dioxide, modified chitosan, 2-(2H-benzotriazole-2-yl)-4, 6-di-tert-pentylphenol, bis (2, 2, 6, 6-tetramethyl-4-piperidinyl) sebacate, flaky aluminum powder, zinc phosphate, BYK-3920, 2-hydroxy-1, 2, 4-triazole-2-yl)-1, 3, 4-triazole-2-yl)-1, 3, 5-triazole-2-yl)-1, 3, 5-triazole-2-yl)-1, 3, 5-triazole-2-yl)-1, 3, 5-triazole-2-yl)-1, 3, 5- The preparation method comprises the following steps: stirring and mixing 2, 2-diphenylethanone and gamma-aminopropyltriethoxysilane at room temperature at 300-350rpm for 10-15min to obtain a mixture, extruding the mixture through a double-screw extruder at the extrusion temperature of 110-120 DEG C and the screw rotation speed of 450-500rpm, and grinding to obtain the single-layer anti-ultraviolet heavy-duty anticorrosive powder coating. The single-layer anti-ultraviolet heavy anti-corrosion powder coating can be applied to metal base material protection. The coating prepared by the invention has good ultraviolet resistance and corrosion resistance.

The invention relates to the technical field of coatings, in particular to a salt-fog-resistant aluminum coating fabric and a production process. The salt-fog-resistant aluminum coating fabric comprises the following raw materials in parts by weight: a basic fabric: 15-32 parts of polyester fibers, 12-28 parts of nylon fibers, 8-22 parts of glass beads and 25-65 parts of modified water-based acrylate emulsion; the spraying solution comprises the following components in parts by weight: 15-30 parts of graphene zinc powder, 12-23 parts of modified epoxy resin, 8-16 parts of an epoxy curing agent, 5-12 parts of polyether alcohol, 2-4 parts of a silane coupling agent, 21-36 parts of aluminum powder and 4-16 parts of hydroxyethyl cellulose. The prepared salt-fog-resistant aluminum coating fabric has excellent high-temperature oxidation resistance and stripping resistance, is excellent in performance as a roller shutter in a severe environment, and is good in scene penetrating effect, high in adhesion, good in reflection effect and good in corrosion resistance when being applied to the roller shutter.

The invention discloses a corrosive liquid pipeline leakage detection and self-repairing device and method, and the device comprises a corrosive liquid pipeline which comprises at least two corrosive liquid pipeline sections; every two adjacent corrosive liquid pipeline sections are fixedly connected through a flange connecting part; the plastic hoop box is installed at the flange connecting part, the lower end of the inner cavity wall is provided with an isolation film to form a closed reagent cavity, aluminum powder and sodium hydroxide are alternately arranged in the reagent cavity, and the isolation film is an oxalate film; the optical fiber temperature measurement system comprises a control trigger subsystem, an optical signal acquisition subsystem, a photoelectric conversion subsystem and an electric signal processing subsystem. The problem that leakage of a corrosive liquid pipeline cannot be found in the first time and emergently handled is solved, leakage points can be self-repaired in the shortest time through automatic judgment, and environmental protection accidents are reduced; and meanwhile, the position of a leakage point can be accurately judged by utilizing an optical fiber temperature sensing system, so that the leakage detection time is shortened, and the leakage detection accuracy is improved.

The invention relates to the technical field of coal-based solid waste resource utilization and mining area ecological restoration, in particular to a coal-based solid waste artificial soil directional pore construction waste dump ecological restoration method which comprises the steps that S1, coal-based solid waste is mixed according to a certain mass ratio; s2, mixing organic matters according to a mass ratio; s3, mixing the mixture obtained in the step S2 with the bacterial liquid; s4, compounding the mixture in the step S3 and the mixture in the step S1; s5, the mixture obtained in the step S4 is mixed with aluminum powder and calcium hydroxide; s6, drying after fermentation in S5, and screening the particle size range to obtain a porous medium; s7, holes are punched in the surface of the waste dump, and then the porous media are buried in the holes; s8, the switchgrass and the apocynum venetum are compounded according to the proportion; s9, planting plants in holes in S7 in a hole sowing manner; and S10, monitoring according to a certain period. The coal-based solid waste resource utilization efficiency and the mining area ecological restoration quality are comprehensively improved through coal-based solid waste particle size and mineral component regulation and control, porous medium pore directional construction and soil-vegetation system coupling.

The invention relates to the technical field of autoclaved aerated concrete slabs, in particular to an autoclaved aerated concrete slab and a preparation method thereof, and the autoclaved aerated concrete slab comprises the following raw materials by mass: 110-120 parts of lime; 140 to 150 parts of cement; 50 to 55 parts of desulfurized gypsum; 9-11 parts of aluminum powder; 8-15 parts of functional particles; 0.15 to 0.25 part of a polycarboxylic acid type water reducing agent; 0.08 to 0.12 part of a citric acid retarder; 0.08 to 0.12 part of a rosin thermopolymer air entraining agent; the hardness of the softened water is lower than 50mg / L. Through innovative design of functional particles and regulation and control of a whole-flow process, collaborative improvement of light weight, high strength, excellent durability and process stability of the autoclaved aerated concrete plate is realized; the problems that strength and density of a traditional product are difficult to balance, durability is insufficient due to weak interface bonding, and process fluctuation is caused by mismatching of gas forming and condensation rhythms are solved.

The invention discloses a modified polyaniline synergistic flaky zinc-aluminum waterborne epoxy anticorrosive coating and a preparation method thereof. The anticorrosive coating comprises a component A and a component B in a mass ratio of (4-5): 1, the component A is prepared from the following components in parts by weight: 8 to 16 parts of waterborne epoxy resin, 55 to 75 parts of zinc powder, 5 to 10 parts of flaky zinc-aluminum powder, 0.3 to 0.6 part of a dispersing agent, 0.5 to 1 part of an anti-settling agent, 0.1 to 0.3 part of dodecylbenzene sulfonic acid doped polyaniline, 1 to 2 parts of an adhesion promoter and 6 to 10 parts of a first solvent; and the component B comprises the following components in parts by weight: 3-7 parts of a water-based amine curing agent, 1-2 parts of an anti-flash-rust auxiliary agent, 5-10 parts of a second solvent and 2-5 parts of deionized water. The obtained coating is compact, excellent in corrosion resistance, good in adhesive force, few in organic volatile matter, easy to prepare, convenient to operate and completely free of chromate, and the corrosion resistance far beyond that of conventional paint is achieved.

The invention relates to the technical field of surface modification, in particular to a preparation method of silicon carbide modified powder. The ceramic material is characterized by comprising the following raw materials in parts by weight: 76-82 parts of silicon carbide powder, 8-12 parts of carbonyl nickel powder, 2-4 parts of aluminum powder, 0.5-1.2 parts of nano yttrium oxide, 2-4 parts of yttrium oxide stabilized zirconium oxide, 1-2 parts of a first additive, 1-2.5 parts of a second additive and 1-2.5 parts of a modified adhesive. Silicon dioxide generated by reaction of silicon hydroxyl on the surface of silicon carbide and oxygen is promoted by the first additive to uniformly deposit in particle gaps to form a continuous and compact initial oxide film, and meanwhile, the thermal expansion coefficient is between that of silicon dioxide and that of silicon carbide, so that the thermal stress difference between the silicon dioxide oxide film and a silicon carbide substrate is effectively buffered; the risk of film cracking caused by thermal expansion mismatch is reduced, and the oxidation resistance of the material is improved.

The invention relates to high-superposition low-loss Fe-Si-Al metal soft magnetic powder and a preparation method thereof.The soft magnetic powder is composed of Fe-Si-Al powder and carbonyl iron powder, and the mass ratio of the Fe-Si-Al powder to the carbonyl iron powder is (6-8): (2-4); the Fe-Si-Al powder comprises, by mass, 6%-9% of Si, 4%-6% of Al, 0.5%-1.1% of Cr, 0.2%-1.5% of Ni, 0.6%-2.0% of Mo, 0.5%-0.8% of Ti, 1%-1.4% of Co and the balance Fe. The total content of Cr, Ni, Mo and Ti is 2.3-4.5%; the particle size of the carbonyl iron powder is 13-18 [mu] m. The soft magnetic material prepared from the high-superposition low-loss Fe-Si-Al metal soft magnetic powder can simultaneously give consideration to high superposition and low loss, the effective magnetic conductivity under 1MHz is 95-112, and the power loss under 1MHz / 100mT is 250-280mW / cm < 3 >.

The invention relates to the technical field of high polymer material processing, in particular to high-dispersion master batch modified ultra-high molecular weight polyethylene and a preparation method thereof. The high-dispersion master batch modified ultra-high molecular weight polyethylene comprises the following raw materials in parts by mass: 82-93 parts of carrier resin; 0.5 to 5 parts of a lubricant; 0.3 to 1 part of an antioxidant; 1-2 parts of a nucleating agent; 2-5 parts of a heat conduction material; 3-5 parts of a reinforcing material; the heat conduction material is silicon carbide or aluminum nitride powder; and the reinforcing material is one of glass fiber powder or carbon nanotubes. According to the invention, uniform dispersion of the auxiliary agent is realized through the high-filling master batch, the problems of poor fluidity, large shrinkage distortion and easy precipitation of the auxiliary agent in the traditional process are solved, and the high strength and wear resistance of UHMWPE are maintained at the same time.

The invention relates to the technical field of powder coatings, and provides a preparation method and equipment of a metal-texture colored powder coating, and the method comprises the following steps: carrying out dispersion treatment on flaky aluminum powder through an alcohol solvent, and then adding a silicon source for hydrolysis reaction, so that the surface of the flaky aluminum powder is coated with a silicon dioxide layer; dispersing the flaky aluminum powder coated with the silicon dioxide layer into water, and adding composite metal salt for co-deposition treatment, so that the surface of the flaky aluminum powder is coated with a composite metal oxide layer; and dispersing the flaky aluminum powder coated with the silicon dioxide layer and the composite metal oxide layer into an organic solvent for polymerization reaction, so that the surface of the composite metal oxide layer is coated to form a polymer resin layer, and the modified aluminum pigment is obtained. The composite metal salt is added for co-deposition treatment, so that the surface of the flaky aluminum powder is coated with the composite metal oxide layer, and the color transition effect can be realized and the color richness can be improved by adjusting the proportional gradient change of various metal salts in the composite metal salt.

The utility model relates to a high-purity aluminum powder grading and collecting device which comprises a bottom frame, a material collecting box is installed on the bottom frame, the material collecting box is coaxially communicated with a detachable screening barrel, the screening barrel is of a split type structure, the screening barrel comprises a plurality of screening boxes, and each screening box is of a cylindrical structure with the two ends open. Every two adjacent screening boxes are detachably connected, screening plates are further coaxially mounted at the bottoms in the screening boxes, a plurality of screening holes are formed in each screening plate, the hole diameters of the screening holes in the screening plates are sequentially reduced from top to bottom, and a stirring mechanism is further coaxially and rotationally connected to each screening plate; every two adjacent groups of stirring mechanisms rotate synchronously and are detachably connected; a barrel cover is detachably installed on the screening barrel, a feeding hopper is fixedly communicated with the barrel cover, a driving mechanism is further installed on the barrel cover, and the driving mechanism is in detachable transmission connection with a stirring mechanism located at the top of the screening barrel.