122 results about "Aluminium powder" patented technology

This invention proposes a multi-layered, sheet-like silver-coated aluminum powder, its preparation method, and a conductive rubber material. The multi-layered, sheet-like silver-coated aluminum powder comprises: sheet-like aluminum powder, a silica layer, and a silver layer; the silica layer coats the surface of the sheet-like aluminum powder, and the silver layer coats the surface of the silica layer. This invention, employing a multi-layered composite structure design of "aluminum core-silica layer-silver layer," solves the problems of poor aluminum powder stability and easy silver migration, and possesses advantages such as low cost and shear resistance, thus obtaining a novel white conductive filler with high performance, high stability, and high applicability.

This invention discloses a high-gloss, high-hardness water-based single-component acrylic industrial decorative topcoat and its preparation method. The topcoat, by weight percentage, comprises: 50%-65% high-gloss hydroxyl acrylic emulsion, 5%-10% silicone-modified acrylic resin, 2%-5% flake-shaped nano-aluminum powder treated with a silane coupling agent, 2%-8% pH-responsive microcapsule crosslinking agent, 0.5%-1.5% anti-flash rust agent, 0.1%-0.5% hydrophobic leveling agent, 0.5%-1.5% thixotropic polyurethane thickener, 0.2%-0.8% pH adjuster, and 0.5%-1.5% wetting and dispersing agent, etc. This invention, by introducing a pH-responsive microcapsule crosslinking agent and flake-shaped nano-aluminum powder, achieves stability of the single-component coating during storage and deep crosslinking after application. The resulting paint film has excellent gloss (60°≥90), high hardness (≥H) and outstanding corrosion resistance (salt spray resistance ≥400h), which solves the contradiction between the insufficient protective performance of existing water-based single-component acrylic topcoats and the poor decorative properties of high-performance anti-corrosion coatings.

This invention relates to a rapid-setting high-strength concrete and its preparation method. The rapid-setting high-strength concrete comprises the following raw materials in parts by weight: 100-200 parts cement, 80-100 parts coarse aggregate, 40-60 parts fine aggregate, 10-20 parts rubber powder, 20-30 parts modified straw-based carbon powder, 0.3-0.5 parts coupling agent, and 0.6-0.8 parts water-reducing agent. The modified straw-based carbon powder is obtained by first adding straw powder to an activation solution containing aluminum sulfate, carboxymethyl starch, and triethanolamine, followed by activation, ball milling, and freeze-drying to obtain a precursor. The precursor is then mixed with flake aluminum powder and heated under an inert atmosphere to obtain the final product. The mass fraction of aluminum sulfate is 5-10%, the mass fraction of carboxymethyl starch is 5-10%, and the mass fraction of triethanolamine is 3-5%. This invention improves the rapid setting effect, compressive strength, flexural strength, and crack resistance of concrete by incorporating modified straw-based carbon powder into the concrete components. This is of great significance for improving the overall performance of concrete and developing infrastructure construction.

The application discloses a kind of doping modification and granulation preparation methods for improving iron powder combustion heat value, belong to new energy storage and zero-carbon fuel technical field.The method is abandoned light and wind power electrolytic hydrogen as reducing agent, hydrogen reduction is prepared to millimeter level fuel particle with ignition temperature ≤600°C after iron oxide raw material is reduced to metal iron powder, through doping aluminum powder, silicon iron powder, magnesium powder and boron powder and other high heat value metal powder, combination binder granulation and surface passivation treatment, heat value ≥18 MJ / kg.The application significantly improves the combustion heat value of iron powder (50-100% higher than pure iron powder), reduces the ignition temperature, improves the storage stability and combustion characteristics, and the combustion products can be magnetically separated and recycled for use, and the remaining components can be sold as building material raw materials, constructing a zero-carbon energy recycling system of "green electricity hydrogen production-hydrogen reduction-iron powder combustion-product recovery", providing a technically feasible and economically reasonable solution for replacing coal-fired power generation.

The application discloses sewage treatment composite purifying agent and a preparation method and application thereof, and comprises the following steps: S1, nanometer aluminum powder is mixed with zeolite and is ball milled to obtain nanometer aluminum powder@zeolite inclusion compound; S2, chitosan is dissolved in acetic acid solution, and mercapto acetic acid is added to react to obtain mercapto chitosan; then the mercapto chitosan is dissolved in acetic acid solution, and a trivalent iron source solution is added dropwise to obtain mercapto chitosan-trivalent iron coordination gel; S3, tea saponin is mixed with beta-cyclodextrin to obtain tea saponin-beta-cyclodextrin inclusion compound; S4, porous ceramic granules, nanometer aluminum powder@zeolite inclusion compound, mercapto chitosan-trivalent iron coordination gel, microcrystalline cellulose and citric acid are uniformly mixed, water is added to granulate to obtain an inner core; S5, sulfur powder is melted, carbonate powder, maifanite powder and tea saponin-beta-cyclodextrin inclusion compound are added to obtain molten slurry, the inner core is added, and stirring is carried out to coat, so that the sewage treatment composite purifying agent is obtained; the sewage treatment composite purifying agent can stably remove various pollutants with high efficiency and can adapt to complex water bodies.

This invention relates to a tetrafluoroborate imidazole-based metal ionic liquid, its preparation method, and its application in coating aluminum powder. The invention pertains to the preparation method of a tetrafluoroborate imidazole-based metal ionic liquid and its use in combination with aluminum powder to form a core-shell fuel (aluminum powder@metal ionic liquid). The aluminum powder@metal ionic liquid core-shell fuel uses aluminum as the core and a tetrafluoroborate imidazole-based metal ionic liquid as the shell material, prepared via solvent evaporation. This series of core-shell fuels exhibits excellent thermal properties and is primarily suitable for solid propellant fuel applications. Furthermore, the preparation method provided by this invention is simple, operates under mild conditions, and uses readily available raw materials.

The application relates to the technical field of metal material processing, and discloses a layered sintering preparation method of a composite layer titanium pot, which comprises the following steps: laying, from bottom to top, stainless steel powder, aluminum powder, active transition layer composite powder and titanium powder in a forming die in sequence, and compacting to obtain a composite green body; placing the green body in a variable pressure sintering furnace, first heating and keeping a low vacuum state; continuously heating to a second set temperature, starting a vacuum pump to instantaneously reduce to a deep vacuum state to discharge gas phase by-products; when heating to a third set temperature, filling argon into the furnace to establish a micro-positive pressure state and constant temperature preservation, inhibiting metal element volatilization and promoting liquid phase filling densification, and finally, cooling at a predetermined rate and naturally cooling out of the furnace. Through a temperature and pressure time sequence coupling process, the application eliminates interface oxide films and hole defects, realizes high-strength metallurgical combination of dissimilar metal materials, and improves the interlayer shear strength, thermal conductivity and thermal shock fatigue life of the composite pot.

The application relates to the technical field of aluminum nitride synthesis, and provides a preparation method of self-propagating combustion synthesis micron-level aluminum nitride powder, which solves the problems of poor controllability, high impurity content, high energy consumption, high cost and coarse and uneven product crystal grains in the traditional aluminum nitride combustion synthesis process; the method comprises the following steps: S1, dosing: the first mixture, the second mixture and the third mixture are all composed of 30-35 parts by weight of mixed aluminum powder, 65-70 parts by weight of aluminum nitride powder and ammonium salt; S2, gradient dosing: the third mixture, the second mixture and the first mixture are sequentially layered and laid into a material frame; S3, combustion reaction: the material frame is placed into a high-pressure reaction kettle, and a current is introduced to trigger a self-propagating combustion synthesis reaction; and S4, post-treatment: after the reaction is completed, the initially prepared micron-level aluminum nitride powder is used as an aluminum nitride diluent, steps S1 to S4 are repeated, 6-8 times of iterative nitriding are carried out, and the self-propagating combustion synthesis micron-level aluminum nitride powder is obtained.

This invention discloses a cathode repair material for aluminum electrolytic cells and its preparation method. The repair material, on a dry basis, mainly consists of the following components by weight percentage: modified corundum 96.2%-98.0%, metallic silicon powder 0.5%-0.8%, passivated aluminum powder 0.5%-0.8%, nano-silica 0.6%-1.6%, rare earth mineral powder 0.4%-0.6%, and dispersant 0%-0.01%. The repair material of this invention can bond tightly with the graphite cathode, reducing crack formation and effectively improving erosion resistance, thereby extending the repair time.

The present application belongs to the technical field of tire manufacturing, and particularly relates to an antiskid tire and a preparation method thereof. The antiskid performance of the tire is significantly improved by adding cerium-doped polyoxometalate-based layered compounds and nitrogen-sulfur co-modified zirconium-based MXene layered compounds in the tread compound. The cerium-doped polyoxometalate-based layered compounds are prepared by hydrothermal reaction and calcination treatment using disodium hydrogen phosphate, sodium molybdate, cerium nitrate and hexanediamine as raw materials. The nitrogen-sulfur co-modified zirconium-based MXene layered compounds are prepared by etching, peeling and co-calcination with thiourea after synthesizing ceramics using titanium powder, aluminum powder, zirconium powder and carbon powder as raw materials. When preparing the tire, the rubber is first mixed with carbon black, the two modified compounds and the additives to obtain a masterbatch, then the vulcanization system components are added to obtain a final rubber compound, and finally the finished product is obtained through extrusion, lamination and vulcanization molding. The antiskid tire prepared by the present application has excellent grip on wet and icy road surfaces.

This invention discloses a low-corrosion chloride molten salt heat transfer and storage medium, method, and application, belonging to the field of molten salt thermal storage technology. The high-heat-capacity, low-corrosion carbonate molten salt heat transfer and storage medium of this invention is composed of 18%~22% potassium chloride, 6%~10% sodium chloride, 1%~3% aluminum powder, 1%~3% magnesium powder, 1%~3% zinc powder, with the remainder being zinc chloride. Its key feature is the introduction of metal powder into the molten salt, which not only achieves excellent thermal storage performance at 600℃~800℃, but also reduces corrosion by utilizing the potential regulation ability of dissolved metal ions and the formation of highly active [Al] from gaseous chloride products through physical and chemical adsorption. This low-corrosion chloride molten salt heat transfer and storage medium achieves excellent thermal storage performance and low corrosivity, and can be applied in solar thermal power generation and molten salt energy storage.

Abstract A coal-based solid waste eco-restoration material and preparation method are provided. The preparation method includes: mixing and placing calcium oleate, sodium silicate, polyvinylpyrrolidone, oleylamine, anhydrous ethanol, and water in a hydrothermal reactor, heating at a constant temperature, centrifuging, and washing to collect inorganic nano-seed crystal; seeding the inorganic nano-seed crystal to form a cementitious material; mixing coal gangue powder with the cementitious material, mineral activator, and physical pore-forming foam, then curing, crushing, and screening to prepare a porous sandy loam matrix; uniformly mixing the prepared porous sandy loam matrix, coal slime, and composite microbial agent, and then fermenting and maturing to obtain the coal-based solid waste eco-restoration material. Compared with the traditional aluminum powder chemical foaming and strong acid foaming, the physical foaming technology adopted in the present disclosure improves the safety of operation while reducing the cost, and is convenient for standardized production. According to the activation of bacteria-fungi composite microbial agent, the nutrient elements in eco-restoration materials can be fully released. The eco-restoration material can be applied to the fields of mine soil restoration, land reclamation and other environmental restoration. FIG. 1 Abstract A coal-based solid waste eco-restoration material and preparation method are provided. The preparation method includes: mixing and placing calcium oleate, sodium silicate, polyvinylpyrrolidone, oleylamine, anhydrous ethanol, and water in a hydrothermal reactor, heating at a constant temperature, centrifuging, and washing to collect inorganic nano-seed crystal; seeding the inorganic nano-seed crystal to form a cementitious material; mixing coal gangue powder with the cementitious material, mineral activator, and physical pore-forming foam, then curing, crushing, and screening to prepare a porous sandy loam matrix; uniformly mixing the prepared porous sandy loam matrix, coal slime, and composite microbial agent, and then fermenting and maturing to obtain the coal-based solid waste eco-restoration material. Compared with the traditional aluminum powder chemical foaming and strong acid foaming, the physical foaming technology adopted in the present disclosure improves the safety of operation while reducing the cost, and is convenient for standardized production. According to the activation of bacteria-fungi composite microbial agent, the nutrient elements in eco-restoration materials can be fully released. The eco-restoration material can be applied to the fields of mine soil restoration, land reclamation and other environmental restoration. Mixing and placing calcium oleate, sodium silicate, S10 polyvinylpyrrolidone, oleylamine, anhydrous ethanol, and water in a hydrothermal reactor, heating at a constant temperature, centrifuging, and washing to collect inorganic nano-seed crystal; Seeding the inorganic nano-seed crystal to form a cementitious S20 material; mixing coal gangue powder with the cementitious material, mineral activator, and physical pore-forming foam, then curing, crushing, and screening to prepare a porous sandy loam matrix; Uniformly mixing the prepared porous sandy loam matrix, coal S30 slime, and composite microbial agent, and then fermenting and maturing to obtain the coal-based solid waste eco-restoration material. FIG. 1 20 25 20 15 77 04 M ar 2 02 5 2 0 2 5 2 0 1 5 7 7 0 4 M a r 2 0 2 5 a n d o t h e r e n v i r o n m e n t a l r e s t o r a t i o n . S 1 0 S 2 0 S 3 0 F I G . 1 2 0 2 5 2 0 1 5 7 7 0 4 M a r 2 0 2 5 a n d o t h e r e n v i r o n m e n t a l r e s t o r a t i o n . S 1 0 S 2 0 S 3 0 F I G . 1 1 / 2 FIG. 1 FIG. 2 1 / 2 Mixing and placing calcium oleate, sodium silicate, S10polyvinylpyrrolidone, oleylamine, anhydrous ethanol, and water in a hydrothermal reactor, heating at a constant temperature, centrifuging, and washing to collect inorganic nano-seed crystal; Seeding the inorganic nano-seed crystal to form a cementitious S20 material; mixing coal gangue powder with the cementitious material, mineral activator, and physical pore-forming foam, then curing, crushing, and screening to prepare a porous sandy loam matrix; Uniformly mixing the prepared porous sandy loam matrix, coal S30 slime, and composite microbial agent, and then fermenting and maturing to obtain the coal-based solid waste eco-restoration material. FIG. 1 Inorganic nano-seed crystal Hydration products 5 um FIG. 2 20 25 20 15 77 04 M ar 2 02 5 S 1 0 2 0 2 5 2 0 1 5 7 7 0 4 M a r 2 0 2 5 S 2 0 S 3 0 F I G . 2 S 1 0 2 0 2 5 2 0 1 5 7 7 0 4 M a r 2 0 2 5 S 2 0 S 3 0 F I G . 2

This utility model discloses a motor controller and a vehicle, relating to the field of electronic device technology. The motor controller includes a control module, a cover, and a conductive rubber component. The control module includes an electronic control board and a mounting base, with the electronic control board disposed on the mounting base. The cover is disposed on the mounting base and has a shielding groove, with at least a portion of the electronic control board disposed within the shielding groove. The conductive rubber component is disposed between the groove wall of the shielding groove and the control module, with the groove wall of the shielding groove communicating with the control module via the conductive rubber component. The conductive rubber component is made of rubber material and conductive material. The rubber material includes at least one of silicone rubber and EPDM, and the conductive material includes at least one of aluminum powder and silver powder. The conductive rubber component provided by this utility model is more practical than the connectors in the prior art.

This application relates to the field of coating technology, specifically disclosing a heat-insulating, flame-retardant, and anti-corrosion coating and its preparation method. A heat-insulating, flame-retardant, and anti-corrosion coating comprises the following raw materials in parts by weight: 50-80 parts of silicone-acrylic emulsion, 10-15 parts of epoxy resin, 30-40 parts of heat-insulating microcapsules, 15-21 parts of hollow glass microspheres, 3-5 parts of dispersant, 0.5-2 parts of polypropylene glycol diglycidyl ether, 1-5 parts of leveling agent, and 15-20 parts of water. The heat-insulating microcapsules comprise an aluminum powder core and a heat-insulating and flame-retardant capsule wall layer, the capsule wall layer material comprising acrylic resin and polyamide resin. The preparation method is as follows: hollow glass microspheres and heat-insulating microcapsules are added to silicone-acrylic emulsion and water and dispersed evenly to obtain a mixture; the dispersant, polypropylene glycol diglycidyl ether, epoxy resin, and leveling agent are added to the above mixture and mixed evenly to obtain the interior wall insulation coating. The composition of this application achieves a comprehensive improvement in heat insulation, flame retardancy, and anti-corrosion performance.

The application relates to a waste battery live treatment and recovery system and method, which separates diaphragms, positive and negative pole pieces and battery housings from waste batteries through twice crushing and entering into a winnowing box. The diaphragms enter into electromagnetic heating carbonization to become positive and negative pole powders and enter into a positive pole piece recovery system. The positive and negative pole pieces enter into magnetic separation through vacuum conveying to separate positive pole pieces and negative pole pieces. The positive pole pieces pass through electromagnetic heating to destroy the adhesive structure of the positive pole, pass through a pulverizer and a winnowing machine to separate positive pole powder and aluminum powder. The negative pole pieces directly enter into the pulverizer and the winnowing machine to separate negative pole powder and copper powder. The battery housings are directly packaged and recovered for separate treatment. The waste battery live treatment and recovery method not only realizes live treatment and recovery of waste batteries, but also comprehensively treats and recovers aluminum, copper, pole powder and housings in the waste batteries, avoids resource waste and pollution, and has low energy consumption, high efficiency, small investment of treatment equipment, simple maintenance and low cost.

The application relates to the technical field of aluminum nitride powder preparation, and particularly discloses an aluminum nitride powder preparation device and a preparation process thereof, which comprises a bottom plate, two mounting racks are fixedly installed on the top surface of the bottom plate, a rotating frame is rotatably installed between the two mounting racks through a rotating shaft, two opposite inner walls in the rotating frame are both rotatably installed with mounting shafts, and the ends of the two mounting shafts close to each other are jointly fixedly connected with a rotating ring arranged in an inclined mode. The grinding barrel is driven by the switching assembly to adjust the inclination with the axis center, so that the raw material powder can be subjected to step-by-step ball milling in the two grinding cavities in sequence, the particle size of the raw material powder is rapidly reduced under the action of large grinding media, the total ball milling time is reduced, the occurrence of cold welding is reduced, the raw material powder is subjected to high-precision ball milling through small grinding media, the raw material powder is further refined, the influence of cold welding on the ball milling quality is reduced, and the agglomeration phenomenon is reduced.

The application discloses a low-VOC amino baking paint effect pigment paint composition, which comprises, in percentage by weight, 4.5-7.5 % of aluminum paste, 12.0-16.0 % of thermosetting acrylic resin, 14.0-18.0 % of polyester resin, 8.0-12.0 % of amino resin, 1.0-3.0 % of blocked isocyanate resin, 0.3-0.8 % of cellulose acetate butyrate, 4.5-6.5 % of microgel-acrylic resin polymer, 0.9-1.3 % of anti-settling wax, 0.1-0.4 % of other additives and 38.0-44.0 % of solvent. The spraying body fraction of the effect pigment paint composition is greater than 41 %, the spraying viscosity range is 19.5-21.5 seconds / 20 DEG C * coating 4 cups, the VOC content under the spraying viscosity meets the requirements of GB / T38597-2020 'Low Volatile Organic Compound Content Coating Product Technical Requirements' - VOC content in solvent-based coatings - requirements of the VOC content in automobile original factory coatings (passenger cars) - basecoat - effect pigment paint - limit value (g / L) <580, and the effect pigment paint has good aluminum powder directional effect, gloss, flicker (FF value) and leveling property, and can meet the matching use with liquid single-component varnish and powder varnish at the same time. The application further discloses an effect pigment paint comprising the baking paint composition and a preparation method and application of the effect pigment paint.

The application discloses an aluminum-based powder fuel with a grain boundary oxygen vacancy channel and a preparation method and application thereof, and particularly relates to the technical field of metal fuel and aluminum-based alloy powder fuel. The method comprises the following steps: heating and melting pure aluminum to form an aluminum melt; then adding an Al-RE intermediate alloy into the aluminum melt, and adjusting the total content of rare earth elements RE in the melt to be 0.1-7 wt%; finally, performing controlled supersonic atomization rapid solidification on the uniformly mixed melt to obtain an aluminum-based alloy powder. After the powder burns, a rare earth oxide channel rich in oxygen vacancy defects is constructed at the grain boundary, and the oxidation combustion is further promoted. The lattice distortion caused by the difference in atomic radii of double rare earth (Ce / La) and the in-situ solid solution of boron atoms greatly reduce the formation energy of oxygen vacancies. In the combustion process, high-concentration oxygen vacancies form a "high-speed oxygen transmission channel", break the barrier of the dense oxide film, and enable oxygen to quickly penetrate into the particle core, thereby significantly improving the burnout rate and energy release efficiency of the aluminum powder.

This invention relates to a method for preparing a core-shell structured Al-Zn@Al2O3 composite phase change thermal storage material, belonging to the technical field of medium- and high-temperature phase change thermal storage materials. This invention involves adding an aluminum powder suspension to an HCl solution and stirring at 45–65°C for 5–10 minutes. Gelatin is then added, and the mixture is reacted at 45–65°C with stirring for 10–20 minutes to obtain solution A. NH4F solution is slowly added to solution A at 40–60°C with stirring, and the reaction continues for 30–60 minutes. A mixture of zinc sulfate solution and ethylenediaminetetraacetic acid is then added, and the mixture is reacted for 3–5 hours. After standing, the solid and liquid are separated. The solid is washed 3–5 times alternately with anhydrous ethanol-water-anhydrous ethanol and dried to obtain solid B. Under a protective atmosphere, solid B is uniformly heated to 600–660°C and calcined at high temperature for 2–4 hours to obtain aluminum-zinc alloy powder. Under an air atmosphere, the aluminum-zinc alloy powder is uniformly heated to ~800°C and calcined at high temperature for 1–4 hours to obtain a core-shell structured Al-Zn@Al2O3 high-temperature phase change heat storage material.

This invention relates to the field of magnesia-carbon brick technology, specifically a preparation process for high thermal shock magnesia-carbon bricks. The process involves mixing fused magnesia, modified graphite, phenolic resin, and aluminum powder, pressing them into shape, and curing them at high temperature to obtain magnesia-carbon bricks. In the low-temperature stage, ammonium bicarbonate decomposes to create pores. In the high-temperature stage, nano-ZrO2 undergoes a phase transformation, actively clamping and healing microcracks caused by expansion, forming a dual protection with the passive filling of the B2O3 liquid phase. Nano-TiO2 and MgO on the modified graphite surface capture impurities in the graphite. Simultaneously, LDH decomposes to generate MgAl2O4 spinel, chemically linking the graphite and magnesia matrix. The alkaline environment of the MgO nanophase lowers the activation energy of B4C oxidation, accelerating its oxidation to B2O3. The liquid phase characteristics of the generated B2O3 allow it to spontaneously penetrate the pores under capillary force. Furthermore, the B2O3 liquid phase reacts with nano-ZrO2 at high temperature to form a boron-zirconium composite oxide.

The present invention relates to a porous electrode having controlled pore size and a method for manufacturing same and, more particularly, to a method for manufacturing a water electrolysis electrode and a water electrolysis electrode manufactured by the method of the present invention, the method comprising the steps of: preparing mixed metal powder including nickel powder and aluminum powder; filling the mixed metal powder into a mold formed in the shape of an electrode; applying pressure to the filled mixed metal powder to form a molded body; subjecting the molded body to first heat treatment in a reducing atmosphere; treating the heat-treated molded body with a basic solution to leach an aluminum component; and performing second heat treatment in a reducing atmosphere.

The present application relates to the technical field of anti-sedimentation agent, and discloses a polyamide anti-sedimentation agent for water-based system, a preparation method and application thereof. The polyamide anti-sedimentation agent is obtained by subjecting 2,6-diamino (N,N-dimethyl ethylamine) hexanoic acid amide and diacid monomers to melt polycondensation reaction, and then subjecting the resultant to quaternary ammonium reaction with hydrochloric acid and alkyl glycidyl ether. The side chain of the anti-sedimentation agent is introduced with hydrophilic amide bond, hydroxyl group and quaternary ammonium salt, so that the anti-sedimentation agent has excellent water solubility and is more suitable for water-based emulsion system. The polyamide anti-sedimentation agent contains alkyl long chain, can form hydrophobic association, plays a thickening role, improves the viscosity and thixotropy of the emulsion, firmly fixes the aluminum powder in the network structure formed by the polyamide anti-sedimentation agent, effectively inhibits the aggregation and sedimentation of aluminum powder particles, and exhibits excellent anti-sedimentation effect.

The application discloses a kind of color aluminum pigments with bio-based dyes as dyeing source and a preparation method thereof, first, the hydroxyl group of bio-based dye is reacted with silane coupling agent containing isocyanate group, then the pretreated aluminum powder is coated and colored at the same time by sol-gel method, and bio-based color aluminum pigment is obtained.The bio-based color aluminum pigment obtained by the application has high color saturation, low-toxicity and degradable dyes, good corrosion resistance, and has wide application prospect in the field of coatings.

The application relates to an aluminum nitride granulated powder and a preparation method thereof, the preparation method comprising the following steps: firstly mixing aluminum nitride powder and a first solvent and obtaining a preliminary blank through suction filtration; crushing the preliminary blank to obtain aluminum nitride agglomerated particles; secondly mixing a second solvent and the aluminum nitride agglomerated particles obtained in step (1) and grinding to obtain a second slurry; and thirdly spraying and drying the second slurry to obtain the aluminum nitride granulated powder; wherein the median particle size D50 of the aluminum nitride granulated powder is 80-95 mu m, the sphericity is preferably as high as 98% or more, and the loose bulk density is preferably as high as 1.1 g / cm 3 The surface morphology is improved, there are almost no apple-shaped powders or hollow powders or other special-shaped powders, the proportion of spherical particles is preferably as high as 97% or more, and therefore the preparation of a high-performance semiconductor wafer support aluminum nitride ceramic heating disc is facilitated.

This invention discloses a method for preparing aluminum nitride powder, comprising the following steps: S1: Selecting spherical aluminum powder with a purity ≥99.9% and pre-treating it; S2: Spreading the pre-treated aluminum powder evenly in a boron nitride crucible, with a layer thickness ≤5mm to avoid incomplete internal reaction; S3: Placing the crucible in a tube furnace and purging the furnace with high-purity nitrogen to replace the air inside; S4: Heating the aluminum powder treated in S3 in stages for nitriding, and then cooling it for later use; S5: The cooled powder exhibits agglomeration, so it is lightly dispersed using an air jet mill and then sieved; S6: Immersing the powder again in 10% hydrochloric acid for 100-120 minutes, washing it with water until neutral, and then vacuum drying to obtain aluminum nitride powder. This invention utilizes dilute hydrochloric acid of different concentrations to immerse the aluminum nitride twice, which removes the aluminum oxide film on the surface of the aluminum powder. By destroying the oxide film on its surface, the nitriding reaction is hindered, effectively preventing the aluminum powder from melting and sintering to form large particles.

This invention discloses a method for preparing a fluorine-free heating and insulating riser, relating to the field of casting technology. The method includes first modifying micron-nano composite aluminum powder with a silane coupling agent, then in-situ reducing and loading zero-valent iron-cerium dioxide catalytic sites, followed by sequentially coating with phenolic resin and a potassium nitrate-manganese dioxide composite oxygen source, and finally forming a silica shell through interfacial hydrolysis and condensation to obtain a core-shell structured composite heating agent. Separately, hollow aluminosilicate microspheres are etched to create pores, then vacuum-impregnated and filled with an organic-inorganic composite aerogel, followed by hydrophobic modification and coating with nano-alumina sol to obtain a composite insulating material. The heating agent is then mixed with the insulating material, mullite powder, corundum powder, expandable graphite, waste glass powder, and a binder, and the mixture is vibrated, compacted, and allowed to cure to obtain the finished product. This invention solves the problems of difficult heating and poor insulation in fluorine-free risers by constructing a multi-level core-shell heating structure and a porous, multi-level insulating structure.

The utility model discloses a modularization mixing kneading device for nickel aluminium powder material recycling, including kneading machine body and kneading paddle, kneading paddle includes the kneading part of middle part and installs respectively at the spline sleeve and hollow axle rod of kneading part both ends, stroke conduit, the outer wall of hollow axle rod is fixedly connected with kneading machine body and is sleeved in, and the outer wall of hollow axle rod is rotatably connected with movable piston through sealing bearing, and hollow axle rod passes through movable piston and stroke conduit sliding seal cooperation, the end of hollow axle rod outer wall still is provided with arc circulating slide groove, and the inner side wall of stroke conduit still is fixedly connected with the sliding block, and stroke conduit passes through the sliding block and arc circulating slide groove sliding. The utility model provides a modularization mixing kneading device for nickel aluminium powder material recycling, and the clearance type compound motion of " rotation + axial swing " of driving kneading paddle is periodically carried out in kneading machine body, and the turning, extrusion and kneading effect of material are enhanced, and the agglomerated powder is effectively scattered.

The present application relates to the technical field of waste magnesite-carbon brick, and particularly relates to a waste magnesite-carbon brick regeneration process based on hydration technology, which comprises the following steps: crushing waste magnesite-carbon brick, carrying out hydration treatment, drying and screening to obtain recycled aggregate, mixing the recycled aggregate with fused magnesite, modified flaky graphite, metal aluminum powder and thermosetting phenolic resin, shaping and solidifying to obtain recycled magnesite-carbon brick. The present application solves the problem that the strong hydrophobicity and dense layered structure of large flaky graphite form a closed effect on water penetration and gas escape, so that CH4 gas generated by hydration of Al4C3 after secondary waste cannot be effectively released, thereby causing explosion.