317 results about "Powder mixture" patented technology

Examples include a device for coating a carrier substrate with a powdered material. The device includes an application unit having a first roller and a second roller which, at a nip thereof, form a first gap through which a powder mixture can be conveyed to form a dry film. A counter-pressure roller, together with the second roller or another roller arranged between the counter-pressure roller and the second roller, forms a second gap through which the carrier substrate to be coated can be guided for having the dry film applied to the carrier substrate. The first gap between the first and second rollers can be adjusted based on a position-based positioning drive by being set to a constant and / or defined gap width, and the second gap can be adjusted based on a force-based positioning drive, and can be set to a constant and / or defined contact force or linear force.

The invention relates to the technical field of runner inserts in fusion reactor cladding structures, in particular to a SiC ceramic-based composite runner insert and a preparation method and application thereof.The preparation method includes the steps that a pyrolytic carbon interface is deposited on SiC prefabricated cloth, and the SiC prefabricated cloth deposited with the pyrolytic carbon interface is obtained; the preparation method comprises the following steps: mixing SiC powder, ZrO2 powder and Al2O3 powder to obtain a filler powder mixture, mixing the filler powder mixture with water, and then adding polycarbosilane to obtain mixed slurry; the mixed slurry is coated on SiC prefabricated cloth, a SiC prefabricated cloth deposition silicon carbide substrate is subjected to densification treatment and finish machining, then a silicon carbide coating is prepared through chemical vapor deposition, and the SiC ceramic-based composite flow channel plug-in is obtained. The preparation method aims at further enhancing the heat insulation performance and the insulating performance of the SiC ceramic-based composite flow channel plug-in, improving the heat insulation performance of the SiC ceramic-based composite flow channel plug-in and improving the heat insulation performance of the SiC ceramic-based composite flow channel plug-in. The average temperature at the outlet of the runner insert is increased, the pressure drop of the magnetofluid is reduced, high-efficiency energy conversion is realized, and meanwhile, long-term safe operation of a reactor is ensured.

This invention belongs to the field of photovoltaic recycling, specifically relating to a method for the comprehensive recycling of waste photovoltaic modules, comprising: disassembling waste photovoltaic panels to separate photovoltaic laminates, aluminum frames, and junction boxes; crushing the photovoltaic laminates to obtain photovoltaic crushed material; subjecting the photovoltaic crushed material to a decomposition reaction to break down the EVA adhesive into non-adhesive molecules; sorting the decomposition reaction-treated photovoltaic crushed material to separate glass, plastic backsheets, and copper powder to obtain a silicon powder mixture; dissolving the silicon powder mixture to obtain a silver-containing solution and silicon powder precipitate; separating the silicon powder precipitate and converting the silver-containing solution into elemental silver for recycling. This invention performs in-depth processing based on physical sorting, further purifying the silicon powder while obtaining valuable metallic silver, increasing economic benefits, reducing recycling costs, and achieving efficient and green recycling of photovoltaic modules.

Calendering methods that accurately and / or precisely calender dry electrode films, and systems thereof, are described. The methods and systems are able to control the calendering nip and / or calendering distance between the calendering rollers with and / or without the presence of an electrode film and / or electrode powder mixture such that the variation of the calendering distance is reduced.

The present invention discloses a transition metal carbonitride-SiC x N y Composite ceramics and a preparation method thereof, comprising: mixing MeSi2 powder and carbon powder and then ball-milling them uniformly, drying and further grinding them to obtain a fully mixed powder mixture; pressing the powder mixture into a ceramic body by a cold pressing process; subjecting the ceramic body to a high-temperature heat treatment in a nitrogen environment, and cooling the ceramic body to obtain a transition metal carbonitride-SiC x N y Composite ceramics. In the process of preparing transition metal carbonitride ceramics, SiC is generated simultaneously. x N y Compared with single-phase ceramics, due to the presence of the second phase, the sintering performance of multiphase ceramics has been greatly improved, and the strength and toughness have been improved. Silicon-based composite carbide ceramics also show better anti-ablation performance, realizing the wide temperature range and high temperature range application of transition metal carbonitrides.

The invention discloses a geopolymer concrete dry blend as well as a preparation method and application thereof, and belongs to the technical field of building materials. The geopolymer concrete dry blend comprises the following components in parts by weight: 20-85 parts of mineral powder; 10 to 35 parts of fly ash; 5 to 30 parts of silica fume; and 5-20 parts of a solid alkali activator A. In addition, the invention also provides a preparation method of the geopolymer concrete dry blend, which comprises the following steps: mixing mineral powder, fly ash and silica fume to obtain a powder mixture N1; mixing a solid alkali activator and a water reducing agent to obtain a powder mixture N2; and mixing the powder mixture N1, the powder mixture N2 and quartz sand to obtain the geopolymer concrete dry blend. In addition, the invention also provides an application of the geopolymer concrete dry blend in preparation of concrete members. A concrete member prepared from the geopolymer concrete dry blend provided by the invention is long in initial setting time and high in strength.

Powder mixture for the use as building material in additive manufacturing processes, wherein the powder mixture includes a first powder having powder particles of a first thermoplastic polymer material, and a reinforcement material that is at least partially embedded in the powder particles of the first powder and / or adhered to the surface of the powder particles of the first powder. The second powder includes powder particles of a second thermoplastic polymer material which is the same as or different from the first thermoplastic polymer material. The powder particles of the second powder do not include the reinforcement material or include it only in an amount of at most 50% by weight relative to the amount of the reinforcement material in or on the powder particles of the first powder.

The preparation method comprises the following steps that pretreated copper powder, a dispersing agent and water are mixed to obtain a copper powder mixed solution, first silver salt, a first complexing agent and water are mixed to obtain a first silver complexing solution, the first silver complexing solution is dropwise added into the copper powder mixed solution, a replacement reaction is conducted, and the silver-coated copper powder with the compact coating is obtained. Intermediate-state silver-coated copper powder is obtained; second silver salt, ammonia water and a second complexing agent are mixed, a second silver complexing solution is obtained, the second silver complexing solution and the reducing agent solution are dropwise added into the intermediate-state silver-coated copper powder at the same time, an oxidation-reduction reaction is carried out, then solid-liquid separation and washing are carried out, and silver-coated copper powder is obtained; through raw material control and step-by-step reaction of first replacement and second reduction, under the condition of low silver content, the uniformity and compactness of a silver layer are improved, the conductivity / oxidation resistance of the silver-coated copper powder is guaranteed, and finally the photoelectric conversion efficiency of the photovoltaic silver paste is improved.

A method for producing binder-coated active battery material agglomerations includes agitating, within a vessel, a volume of a binder-solvent solution across two or more steps with a particulate mixture including active battery material particles. The binder-solvent solution has a solubility limit for a mixture of binder material particles within a first solvent solution at a first set of environmental parameters. While retaining the particulate mixture within the vessel, the particulate mixture is subjected to a second set of environmental parameters across two or more steps which reduces the solubility limit to generate a powder mixture of binder-coated active battery material agglomerations.

The invention relates to a high-frequency electric resistance welding method for a transformer, and relates to the technical field of metal welding. A layer of self-reaction soldering paste is applied to the to-be-welded surface of the coil or the iron core to serve as a middle layer; and performing high-frequency resistance welding after mounting and positioning. The self-reaction soldering paste is the technical core of the invention and is composed of a powder mixture containing a solid chemical reducing agent and nano metal particles and an organic carrier. Under excitation of welding heat, the solid chemical reducing agent is subjected to an in-situ chemical reaction, and metal oxides on a welding interface are effectively removed; and meanwhile, the low-melting-point nano metal particles are rapidly melted, the purified clean interface is filled, and a compact metallurgical bonding layer is formed. Through the synergistic effect of chemical purification and physical filling, a defect-free welding joint is obtained, the welding joint has excellent mechanical strength and extremely low contact resistance, the process window is remarkably widened, and the reliability of the welding process is improved.

The utility model discloses a granulator, including the work tank, the top intercommunication of work tank has the powder mixture cavity. The utility model discloses adopt this device to control each intelligent conveying valve through intelligent control device, and then control the powder amount of unloading in each storage hopper, and then control powder mixing precision, in order to avoid the powder in storage hopper to gather in the inside of storage hopper and cannot even fall to the powder conveying pipe, and the operator can rotate each stirring rod through the drive assembly, and then the powder in storage hopper is stirred, when the first gear rotates, will drive the slider to reciprocate up and down, enter and drive the support rod and dredging piece reciprocate up and down, when the dredging piece moves up and down, will agitate the powder in storage hopper, after the powder even enters the powder conveying pipe, the powder is conveyed to the powder mixture cavity through intelligent conveying valve, and the device has the advantages of can control powder mixing precision and improve production quality.

The present application relates to the preparation method of thick polycrystalline diamond compact for oil and gas drilling, which comprises the following steps: mixing two or more kinds of diamond powder with impurities removed; sand blasting the cemented carbide substrate; sequentially loading the impurity storage layer, the diamond powder mixture layer, the low-melting-point metal sheet, the cobalt sheet and the cemented carbide substrate into a high-temperature-resistant metal cup; placing the high-temperature-resistant metal cup into a synthetic block and then into a six-surface press; performing two-stage high-temperature and high-pressure sintering, wherein the first stage is sintering at a pressure of 5.5-5.8 GPa and a temperature of 800-1300 DEG C for 60-150 seconds, and the second stage is sintering at a pressure of 6-8 GPa and a temperature of 1490-1580 DEG C for 450-700 seconds; and taking out at room temperature and normal pressure. The impurity storage layer, the low-melting-point metal sheet and the cobalt sheet are arranged, and the high-temperature and high-pressure scanning sintering method is adopted, so that the thickness of the diamond layer reaches 3-4 mm after sintering, and the service life is greatly prolonged.

The invention relates to a corundum-CMA-magnesium aluminate spinel gradient composite hollow sphere and a preparation method thereof, and belongs to the technical field of refractory materials. The preparation method comprises the following steps: uniformly mixing a calcium raw material, an aluminum raw material and a magnesium raw material, adding a binding agent, and mixing to obtain a mixed raw material; granulating the mixed raw material to obtain spherical particles; mixing the aluminum raw material and the magnesium raw material; secondly, taking spherical particles as cores, and wrapping the powder mixed in the last step in the rotating process of the pelletizer, so as to form a heterogeneous spherical particle precursor rich in CaCO3; fully drying the obtained precursor spherical particles, calcining in a high-temperature furnace, and cooling along with the furnace to obtain the corundum-CMA-magnesium aluminate spinel gradient composite hollow sphere. The corundum-CMA-magnesium aluminate spinel gradient composite hollow sphere prepared by the invention has the characteristics of light weight, good heat insulation property, high use temperature, excellent erosion resistance, high high-temperature strength and good melting point thermal shock resistance.

The application provides a membrane preparation device, a pole piece manufacturing equipment and a membrane preparation method. The membrane preparation device comprises a mixing mechanism, a first feeding mechanism, a second feeding mechanism and an extrusion die. The first feeding mechanism is used for adding a powder mixture containing a powder and a first binder into the mixing mechanism. The second feeding mechanism is used for adding a solution containing a second binder into the mixing mechanism. The mixing mechanism is used for mixing the powder mixture and the solution. The extrusion die is connected to the discharge end of the mixing mechanism and is used for extruding a membrane. When the membrane preparation device is applied to the preparation of an active material layer membrane of a pole piece, the mixing uniformity and the distribution uniformity of the active material mixture can be effectively improved, and the proportion of the active material can be increased. Therefore, the production quality of the pole piece is effectively improved, and the energy density of the battery is effectively improved.

The application relates to a preparation method of a metal-based ceramic composite material and the metal-based ceramic composite material, and steps are as follows: 1. ceramic particle screening and pretreatment: screening and polishing are sequentially performed on the ceramic particles, and the Al2O3 and B4C powder mixture is uniformly sprayed on the surface of the polished ceramic particles in a thermal spraying mode; 2. ceramic preform preparation: after the pretreated ceramic particles, a bonding agent and a mixed powder are uniformly mixed, the mixture is filled into a mold, one-time solidification treatment is performed, a preliminarily formed ceramic preform is obtained, secondary solidification treatment is further performed, and the ceramic preform is obtained; 3. metal-based ceramic composite material pouring forming: the ceramic preform is placed in a casting cavity, metal liquid pouring is performed, and after cooling, the composite material is taken out; 4. heat treatment: the composite material is sequentially subjected to multi-stage normalizing heat treatment and tempering heat treatment, and the metal-based ceramic composite material is obtained. The application solves the problems of ceramic particle peeling and composite layer cracking of the existing composite material.

The object of the present invention is to provide a high-temperature-melt fluororesin powder coating composition containing a filler that can produce a coating film having excellent corrosion resistance and surface properties. The present invention is a powder coating composition comprising a powder mixture comprising: first high-temperature-melt fluororesin particles in which a filler is dispersed; second high-temperature-melt fluororesin particles having an average particle diameter of 10 to 200 μm; and charge modifier particles, wherein the amount of the filler is 7 to 15 weight% based on the total amount of the powder mixture.

The invention relates to the technical field of asphalt mixing station waste powder treatment, and particularly discloses an asphalt mixing station waste powder on-line collection-solidification-granulation integrated treatment method which comprises the following steps: waste powder grading: carrying out on-line negative pressure grading on waste powder generated by an asphalt mixing station; cross-linking detection: detecting the content of asphalt in the fine powder on line; cross-linking modification: adding an organic prepolymer cross-linking agent into the fine powder and introducing waste heat of an asphalt mixing station; mixing the materials: respectively mixing the coarse powder and the modified fine powder with a cement-slag composite curing agent; pressurizing and granulating: granulating the coarse powder mixture and the modified fine powder mixture through a two-stage pressurizing process; and grading and recycling: carrying out waste heat gradient maintenance on the aggregate green body through an asphalt mixing station. According to the method, differential treatment of the coarse powder and the fine powder is achieved through online negative pressure grading, the characteristics of the fine powder are combined with the asphalt content to adapt to crosslinking parameters, and the organic prepolymer crosslinking agent is added, so that the obtained cured product is stable in mechanical property and can meet the long-term use requirement of road engineering.

The invention discloses a method for preparing light recycled aggregate from construction waste, and relates to the technical field of building materials, and the method comprises the following steps: firstly carrying out coarse crushing on broken tiles and concrete blocks in the construction waste, then carrying out secondary crushing, and then screening to obtain a fine aggregate and powder mixture; auxiliary materials, a gelling agent and water are added into the mixture of the fine aggregate and the powder, the auxiliary materials comprise fly ash and clay, and the gelling agent is cement; the mixture is placed in granulation equipment for rolling granulation, and the diameter of formed wet particles is within the range of 5-20 mm by regulating and controlling the water adding amount. The light recycled aggregate is prepared by taking broken bricks and tiles, concrete blocks and the like in the construction waste as main raw materials through the steps of crushing, screening, adding auxiliary materials for granulation, molding treatment and the like, a brand new high-added-value utilization way is provided for low-value construction waste fine materials, the environmental pressure caused by construction waste accumulation is effectively reduced, and the environment pollution is reduced. And cyclic utilization of resources is realized.

Disclosed herein are metal matrix composites and methods of making and use thereof. For example, disclosed herein are methods of making a metal matrix composite comprising a metal matrix reinforced by a high entropy alloy. The methods comprise mixing a first powder and a second powder to form a powder mixture, wherein the first powder comprises a plurality of particles comprising a metal and the second powder comprises a plurality of particles comprising a high entropy alloy. The methods further comprise compacting the powder mixture to form a pellet and adding the pellet to a molten metal, the molten metal comprising the metal in a molten state, thereby melting the pellet to form a molten mixture. The methods further comprise subjecting the molten mixture to an ultrasonic treatment and casting the ultrasonic treated mixture to form the metal matrix composite.

The present invention relates to a process for producing a steel alloy part, which includes providing a steel alloy powder mixture containing SiC, forming the part from the powder mixture using an additive manufacturing technique, and subjecting the formed part to a thermal treatment for a duration of 1 to 150 minutes at a temperature ranging from 600°C to 750°C. This process is particularly suitable for creating parts with enhanced properties, such as cutting tools, bearings, punches, and gears, which can be crack-free and defect-free. The additive manufacturing technique is Laser Powder Bed Fusion. The steel alloy powder mixture composition and preparation method are also detailed, along with the characteristics of the resulting steel alloy part, which comprises a bainitic ferrite matrix with graphite particles and carbides distributed therein.

This invention relates to a dry-process electrode sheet and its preparation method. Without the use of solvents, based on a powder electrode forming method, powdered active materials and powdered binders are mixed and pulverized to prepare a powder mixture with uniform size distribution. Then, the powder binder is fiberized using a twin-screw extruder or open mill to prepare a dry-process electrode sheet film. The target electrode sheet thickness and compaction density are then achieved using a rolling mill. This electrode sheet film can be directly fabricated into a dry-process battery electrode sheet, which can be independently assembled as a catalyst layer in water electrolysis. This invention further includes a dry-process battery electrode sheet combining the electrode sheet film and an electrode substrate, which can be independently assembled as an electrode or membrane electrode in water electrolysis. This invention does not involve solvents, effectively reducing the cost of solvent use and drying processes during preparation.

The application relates to a high-entropy rare earth hafnate ceramic coating material and a preparation method thereof, and belongs to the technical field of high-entropy materials. The phase composition of the coating material is (Y 0.2 Yb 0.2 Ho 0.2 Er 0.2 Tm 0.2 )2Hf2O7, which is a single-phase defect fluorite structure; the raw material powder is fully and uniformly mixed through wet ball milling, and then the raw material powder mixture is alloyed through a solid-phase sintering process to prepare the single-phase coating material, wherein the high-entropy rare earth hafnate ceramic element is uniformly distributed, the thermophysical performance is excellent, the high-temperature phase is stable, the coating material has low thermal conductivity and high thermal expansion coefficient, and has a wide application scene in the field of key high-end equipment thermal protection coating.

The present invention provides a method for measuring particle mass flow. The method discretizes the air-powder mixture passing through fixed blades into multiple particle microelements along the circumferential arrangement direction of the sensor. The microelements collide with the pipe wall during spiral motion to generate tangential force, radial force, and axial force, causing the sensor to generate a deformation output voltage. The present invention fits the relationship between the microelement mass and voltage, uses the discretization method to calculate the mass M of the coal powder, and then uses the cross-correlation method to calculate the transit time of the particles between the two layers of sensors, thereby obtaining the mass flow Q. m The present invention relies on the piezoelectric effect and the particle dynamics model to measure the mass flow of particles in the air powder, thereby ensuring the accuracy of the coal powder mass flow measurement.

Composition and Seal for Electrochemical System and Manufacturing Method. The invention relates to a fluid composition for forming a gas-tight seal for an electrochemical system, characterized in that it comprises a main mineral filler phase and an additional mineral filler phase, the additional mineral filler phase comprising a powdered mixture of vermiculite and steatite, the mixture representing up to 30% by weight of the total weight of the composition. The invention also relates to a seal for an electrochemical cell unit formed from the fluid composition comprising the main mineral filler and the additional mineral filler, as well as a fuel cell or fuel cell component comprising one or more seals according to the invention. Figure for the abstract: Fig. 1

The present application relates to a kind of metal matrix composite prepared by friction stir processing method, including the mixing of metal matrix composite reinforcement and substrate powder, according to the size of stir pin and shaft shoulder in the stir head of friction stir equipment, using milling cutter to open the groove on pure metal mold, the width is greater than the diameter of stir pin, the depth is greater than the length of stir pin;Reinforcement and substrate powder mixture is added to the groove and is maximized compaction, in the processing area of special friction stir welding machine, the center of stir pin of stir head is aligned with the center of groove, is prepared under the processing scheme of multiple passes variable stir head speed, obtains metal matrix composite at the groove of composite plate processing area, the obtained metal matrix composite reinforcement is uniformly distributed, and the mechanical and friction and wear performance is excellent.The present application can automatically prepare a variety of different kinds of metal matrix composite, without determining specific process parameters for different kinds of metal and reinforcement test, and is widely applicable.

The present application relates to graphite electrode production feeding technology field, especially to a kind of graphite electrode production feeding equipment, including support platform, operation display system, material box, horizontal feeding system and vertical feeding system;The present application is aimed at the problem that the end of feeding is blocked or adhered to affect metering and weighing, first, through the continuous rotation of spiral roller, the inside pipe is actively dredged;Combined with the revolution plus rotation movement of wall-sticking scraping unit, the fine powder adhered to the pipe wall is continuously scraped during the conveying process, to prevent the formation of material accumulation layer, forming mechanical dynamic scraping cleaning;Combined with airflow pulse assembly, not only provide continuous air curtain isolation, its periodic high pressure pulse generates micro-impulse wave, effectively shakes the material bridge or soft blockage just formed, forms airflow pulse disturbance protection, the above three aspects work together to solve the end material accumulation problem, realize the high-precision, high-stability conveying requirement of carbon powder mixture in graphite electrode production.

The invention relates to the technical field of alloy powder preparation, in particular to a preparation process of alloy powder for spraying a fracturing pump plunger, and the process comprises the following steps: selecting high-purity Ni, Fe, Cr, Si, B and C as raw materials; the raw materials are sequentially added into the smelting furnace to be melted and alloyed; extracting slag, preserving heat, and discharging to obtain molten steel; high-pressure water atomization equipment is adopted to enable high-speed water flow to impact the molten steel so as to crush the molten steel into liquid drops, and the liquid drops are cooled and solidified in an atomization tower to form powder and collected; according to the distribution characteristics of various temperature data collected and analyzed in real time in the atomization powder making process, feedback signals of a PLC system feedback controller are adjusted in real time so as to adjust the temperature of high-pressure water and the temperature of an atomization chamber; and carrying out dehydration treatment on the discharged water-powder mixture, and drying, airing and screening the water-powder mixture. According to the method, the influence of temperature instantaneous fluctuation abnormity on the powder preparation process is accurately captured, dynamic closed-loop control over the temperature parameters is achieved, and the sphericity degree and the granularity uniformity of the powder are improved.

A preheating device (60), an apparatus (100) for treating waste powders (19) comprising the preheating device (60), and a method for heating a mixture of powders (13) by using the preheating device (60). The preheating device (60) is for heating a mixture of powders (13) during the production of steel (82) and / or during the treatment of scrap (49, 83) resulting from steel production (82). The preheating device (60) comprises a heat exchange chamber (69) configured to: receive exhaust gases (15) resulting from steel production (82) and / or from the treatment of the scrap (49, 83), the preheating device (60) being configured to receive the exhaust gases (15) from a melting furnace (28); and transmit heat from the exhaust gases (15) to the mixture of powders (13), so as to heat the mixture of powders (13) by recovering heat from the exhaust gases (15).

This invention discloses a multi-directional flow field electrostatic separator, belonging to the technical field of powder classification equipment, and used in a coal mill. The static separator includes: an inner cone; an outer cone located circumferentially outside the inner cone, with a mounting plate covering the top of the outer cone above the inner cone; an axial guide vane assembly located at the lower part of the annular space formed by the inner and outer cones, used to guide the axial flow of the air-powder mixture entering the annular space; and a radial guide vane assembly located between the mounting plate and the inner cone, used to guide the radial flow of the air-powder mixture from the axial guide vane assembly. In this application, the radial and axial guide vane assemblies cooperate to guide the radial and axial flow of the air-powder mixture, respectively, enhancing the device's ability to control the fineness and uniformity of coal powder and improving the coal powder separation capacity.

The present invention relates to a powder mixture, in particular for remineralizing teeth, a powder jet device, in particular for use in the dental field, a use of the powder mixture for producing an agent for remineralizing teeth, a method for remineralizing teeth, and a use of a powder mixture in a dental device. The powder mixture comprises a deposition powder designed to adhere to tooth surfaces.