75 results about "Mixed metal" patented technology

This utility model relates to the field of metal processing technology, specifically to a drying and temperature measuring device for metal mixture briquetting and rolling products. It includes a housing and a placement mechanism. The placement mechanism includes two limiting components, a support plate, a connecting plate, a sliding block, a lead screw, and two first electric push rods. The two limiting components are respectively disposed on both sides of the housing, and the connecting plate is disposed between the two limiting components. The support plate is rotatably connected to the two limiting components, the sliding block is fixedly connected to the connecting plate, the lead screw is rotatably connected to the housing, and the lead screw is threadedly connected to the sliding block. One end of each of the two first electric push rods is rotatably connected to the connecting plate, and the other end is rotatably connected to the support plate, and they are respectively disposed on both sides of the lead screw. This structural design solves the problem in the prior art where it is inconvenient to place or collect the dried mixed metal, thus affecting work efficiency.

This invention provides a high-entropy doped composite sodium iron pyrophosphate cathode material, its preparation method, and a battery. The preparation method includes: passing a mixed metal source solution, a phosphorus source mixture, an oxidant solution, and a complexing agent solution into a base liquid to perform a co-precipitation reaction to obtain a precursor material; the mixed metal source solution includes an ferrous source, a nickel source, a cobalt source, a manganese source, a chromium source, and additives, wherein the additives include sodium alginate and / or sodium carboxymethyl cellulose; the precursor material, the sodium source, and the carbon source are sequentially mixed, spray-dried, and sintered to obtain the high-entropy doped composite sodium iron pyrophosphate cathode material. The preparation method of this invention introduces multiple metal elements, additives, and complexing agents during the co-precipitation reaction, enabling multiple metal elements to be uniformly doped into the crystal structure of the material. This utilizes the synergistic effect of high-entropy multiple factors to enhance the structural stability of the material, optimize electron / ion transport dynamics, and improve cycle and high-rate performance.

The utility model discloses a kind of high-efficiency stirring head devices for copper-aluminum alloy dissimilar alloy welding, belong to welding stirring tool technical field, including rotary friction tool, shaft sleeve and stirring needle, machine tool is driven handle rotation, in turn drive rotary friction tool high-speed rotation.And the end of rotary friction tool is provided with shaft shoulder, the center of shaft shoulder inserts stirring needle, stirring needle is coaxial transmission connection with rotary friction tool, to drive stirring needle rotation by rotary friction tool, and the end of shaft sleeve is provided with compact smoothening mouth, in welding process, the compact smoothening mouth of shaft sleeve can be flattened and compacted to plasticized metal material, and ensure that metal material surface is flat.And shaft sleeve side is provided with discharge port, and excess plastic mixed metal material is discharged from discharge port in welding process, simultaneously, airflow is outwardly radiated by convection tank, to inhibit rotary friction tool temperature rise, to relieve the effect of rotary friction tool and stirring needle heat deformation.

The present invention relates to AB2O4 type mixed metal oxide catalyst system having spinel / inverse spinel structure with support. The present invention also relates to the process for preparation of mixed metal oxide catalyst system. More particularly, the present invention relates to a process for the partial oxidation of alkanes to value added products and corresponding oxygenates by using said AB2O4 type mixed metal oxide catalyst with support(s).

This invention discloses a thermal shock-induced catalytic electrode, its preparation method, and its application in wastewater treatment, belonging to the field of wastewater treatment technology. The catalytic electrode comprises a titanium metal substrate and a mixed metal oxide catalytic layer formed on the surface of the titanium metal substrate. The mixed metal oxide catalytic layer has a hydroxylation-rich surface, high specific surface area, and large pore volume, and its microstructure is a uniform mud-crack-like porous structure containing nanoscale grains. The preparation method includes first laser shock strengthening of the titanium metal substrate to form a mesoscale array structure; then loading the mixed metal oxide precursor using an immersion-pulling-space flow method; subsequently performing annealing; rapidly immersing the annealed electrode in a hydrogen peroxide solution for thermal shock quenching; and finally performing low-temperature tempering to eliminate internal stress and reduce resistance. The catalytic electrode of this invention achieves a balance between catalytic activity, conductivity, and stability, and its preparation process is simple and easy for large-scale industrial production.

This invention relates to the field of gear performance testing technology, and more particularly to a gear performance testing system based on mixed metal powder pressing molding, comprising: a testing machine, which includes a rotating component and a support; a defect information acquisition module, including an eddy current probe for acquiring the induced electrical signal generated when the gear under test interacts with an alternating magnetic field and a purging component; a detection module for acquiring the vibration value of the eddy current probe and the dust concentration at a dust concentration sampling point below the eddy current probe; and a control module for determining the current rise slope of the alternating current based on the vibration difference, determining the vertical height of the support based on the overlap between the dust-containing area on the surface of the gear under test during the uniform rotation phase and the corresponding fixed area, and determining the purging duration of the purging component based on the decrease in dust concentration in the dust-containing area within a unit dust monitoring cycle. This invention improves the accuracy of gear performance testing.

Jewellery - Mixed Metal Bulls Lick Nose Ring with Gemstone

The application discloses a method for preparing an electrochemical catalyst from solid humin, and first, solid humin is obtained, then pretreated humin powder, mixed metal salt and thiourea are added into a zirconium oxide or agate ball mill jar, then ethanol solution is added until the powder is just wet; subsequently, grinding balls are added, the jar cover is tightly covered, and the jar is placed in a planetary ball mill for ball milling; after the ball milling is completed, ethanol aqueous solution is used to wash out the slurry in the jar, the mixed solution is thinly spread in a container and transferred to an oven for drying; after drying, flaky particles are formed, which are ground into powder using a mortar and transferred to a porcelain boat and placed in a tube furnace for precalcination under a nitrogen flow; after the calcination is completed, the solid powder is collected, which is the humin derivative carbon supported transition metal sulfide electrocatalyst to be prepared; compared with a traditional carbon supported metal catalyst, the application has multiple advantages of high intrinsic activity, strong structural stability and excellent electronic adjustability in HMF oxidation, and provides an ideal material platform for efficient electrocatalytic conversion of high-purity biomass platform molecules.

The application discloses a system and method for continuously preparing supported metal nanomaterials based on a spiral flow reverse microchannel reactor coupled with three-side ultrasonic field. The method adopts the optimal combination of a spiral flow reverse microchannel reactor and ultrasonic to prepare the supported metal nanomaterials, and specifically comprises the following steps: mixing a mixed metal ion precursor solution with a carrier, injecting the mixed solution and a reducing agent into the spiral flow reverse microchannel reactor by using a syringe pump, and synthesizing the supported metal nanomaterials under the action of specific three-side ultrasonic positions. The powder is obtained through centrifugation, filtration and drying. The application realizes the rapid mixing of the reaction fluid, the ultrasonic action on specific 1, 2 and 3 surfaces, the non-uniform distribution of the ultrasonic field, and the supported silver nanoparticles with small particle size and narrow distribution. Meanwhile, the application relieves the plugging problem of the microchannel reactor applied in the preparation of the supported nanocatalytic material, and realizes the continuous long-time production of the product.

This invention discloses an insulating coating method for ultrafine soft magnetic powder. First, a water glass mixed solution is prepared using sodium silicate solution and deionized water. Then, metal raw materials are weighed, mixed, and smelted / atomized. Finally, nitrogen gas is introduced for pressure filtration, and the powder is dried and sieved. The modulus of the sodium silicate solution is 2.3 or 3.3, and the sodium silicate concentration in the water glass mixed solution is 0.5-10%. This invention uses the water glass mixed solution prepared from sodium silicate and deionized water as the atomizing water, directly forming an insulating coating on the powder surface during the smelting / atomization process. The coating is more uniform, and the powder exhibits better magnetic properties, eliminating the need for subsequent additional insulating coating and reducing the risk of flammability and explosion during operation. Simultaneously, the reduced surface tension of the atomizing water significantly reduces crushing energy consumption. The increased internal water viscosity prevents the powder from colliding and agglomerating again, retaining a finer particle size.

The application relates to the field of resource recycling, and specifically discloses a method for recycling waste lithium battery positive electrode materials from electrolytic gas field water. The method comprises the following steps: preparing sodium hydroxide and sodium carbonate solids; sequentially treating the gas field water with the sodium hydroxide and the sodium carbonate to precipitate and remove impurity ions such as magnesium and calcium, and obtaining pretreated gas field water; taking the pretreated gas field water as an electrolyte, placing waste lithium battery positive electrode materials in an anode chamber of an ion membrane electrolytic cell, performing constant current electrolysis by relying on green power of a natural gas well site, leaching valuable metals from the anode, synchronously generating hydrogen and precipitating metals at the cathode, and synchronously outputting chlor-alkali products from the anode; after electrolysis, solid-liquid separation is performed on materials at the two poles respectively, finally, the anode liquid and the cathode liquid are mixed to co-precipitate residual metal ions, mixed metal precipitates are obtained after filtration, and the product can be used for lithium battery positive electrode material regeneration. The application couples gas field water treatment and battery recycling, treats waste with waste, does not need to add acid and alkali, and has a green and low-carbon process, so that the utilization of waste resources is realized and high value utilization is achieved.

The application discloses a kind of sulfur-coordinated iron single-atom modified radial gradient pore nitrogen-doped carbon lithium-sulfur battery positive electrode carrier materials and preparation method and application, belong to lithium-sulfur battery positive electrode material technical field.Oxidized graphene is mixed and dispersed in water with cellulose nanofiber, to form dispersion, zinc salt and iron salt are prepared mixed metal salt solution is added to the dispersion, composite hydrogel is formed by electrostatic self-assembly and is immersed in the solution containing sulfur organic precursor, to obtain sulfur-containing composite hydrogel;After directional freezing, freeze-drying, the aerogel precursor with radial gradient pore structure is obtained;In inert atmosphere protection, with solid-state nitrogen source in isothermal zone but non-contact, program temperature carbonization treatment is carried out, and the sulfur-coordinated iron single-atom modified radial gradient pore nitrogen-doped carbon lithium-sulfur battery positive electrode carrier material is obtained.By sulfur-coordinated regulation atomic activity and radial gradient pore optimization mass transfer synergy, the sulfur utilization, rate performance and cycle life are significantly improved.

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 application provides a gradient multi-element composite self-lubricating seal coating and a preparation method thereof. The coating is composed of a double-layer multi-element composite coating structure of a "matching layer-protection layer" gradient transition. The matching layer is composed of multi-element mixed metal powder. The protection layer is composed of a metal phase with a mass fraction of 70% to 80% and good corrosion resistance, a self-lubricating phase doped with a single element or a compound with a mass fraction of 15% to 30% and self-lubricating properties, and a ceramic phase with a mass fraction of 2% to 3% and a certain hardness. The application combines the coupling protection requirements of wear resistance, self-lubrication, corrosion resistance and the like of the seal coating, takes a metal-based material with excellent corrosion resistance as a main phase, selects a hard wear-resistant phase, a self-lubricating phase, a regulation and control phase and the like for synergistic matching and strengthening, constructs a multi-element composite corrosion-resistant seal coating material system, designs the double-layer multi-element composite coating structure of the "matching layer-protection layer" gradient transition, and guarantees the matching and bonding strength of the coating system. The application can be used for sealing of aviation casing parts.

The invention relates to a method for producing hydrogen from water vapor by contacting water vapor and a catalytically acting mixed metal oxide and to a device for this purpose.

A sulfur trap system is provided for protecting methane oxidation catalysts (MOC) from sulfur poisoning in sulfur-containing exhaust. The trap is positioned upstream of the MOC and includes a washcoat comprising zeolite, cerium-based oxygen-storage material, and alumina, and an overcoat containing copper, manganese, and cerium oxides. The mixed metal oxide and support formulation delivers high sulfur adsorption at engine exhaust temperatures, reducing sulfur to safe levels and extending the operational life and methane conversion performance of downstream palladium-based MOC systems.

The invention relates to the technical field of alloy coatings, in particular to an in-situ TiC reinforced AlCoCrFeNiMo high-entropy alloy laser cladding coating and a preparation method thereof.The preparation method comprises the steps that S1, mixed metal powder, Ti powder, graphite powder and modified powder are added into a ball milling tank and subjected to ball milling under argon protection; s2, the surface of the base material is polished with abrasive paper, an interface bonding modifier is sprayed after ultrasonic cleaning, and a pretreated base material is obtained; and S3, cladding a coating on the surface of the base material by using DML2000 laser cladding equipment, and cooling to room temperature along with the furnace after cladding is completed. According to the method, through the in-situ reaction of Ti and C in the laser cladding process, a TiC reinforced phase is generated in an AlCoCrFeNiMo high-entropy alloy matrix, the problems of uneven distribution, poor interface bonding and the like caused by direct addition of TiC are avoided, and the bonding strength of the reinforced phase and the matrix is improved. And due to introduction of TiC, crystal grains are refined, lattice distortion is increased, and therefore the comprehensive performance of the coating is improved.

The application provides a metal material recycling device and a method for recycling lithium iron phosphate. It relates to the field of metal material recycling. The metal material recycling device comprises a leaching tank placed on the ground by a support. The metal material recycling device provided by the application drives the fan blades to lift by the air cylinder, realizes the effect of fully mixing the metal material and water at different levels, effectively breaks the stratification, guarantees the uniformity of the slurry, and improves the leaching efficiency of lithium, phosphorus and iron in the waste lithium iron phosphate positive electrode material through the synergistic effect of sulfuric acid and hydrogen peroxide in the oxidation leaching process. The oxidation leaching liquid and the oxidation leaching residue are separated by the first filter screen, and then the oxidation leaching liquid is filtered twice by the second filter screen to avoid omission, ensure the purity of the oxidation leaching liquid, and realize the efficient recovery of lithium, phosphorus and iron in the leaching residue. When the residue is discharged, the fan blades attached to the lower cover are used to collect the residue manually, realize the efficient recovery of lithium, phosphorus and iron in the leaching residue, realize the full mixing, complete leaching and full separation of solid and liquid, and improve the metal material recycling rate.

This invention discloses a modified biochar-supported CoNiFe-LDH catalyst, its preparation method, and an application, relating to the technical field of catalytic materials. Using corn stalk biochar as raw material, the biochar is modified through sequential calcination, acid washing, alkali activation, and recalcination to improve its specific surface area and surface activity. The modified biochar is further introduced into a mixed metal salt solution composed of cobalt nitrate hexahydrate, nickel chloride hexahydrate, and ferric nitrate nonahydrate. A mixed alkaline solution composed of sodium hydroxide and sodium carbonate is added dropwise, and under heating and aging conditions, in-situ growth of CoNiFe-LDH is achieved on the surface of the modified biochar, yielding a modified biochar-supported CoNiFe-LDH composite material. This method is simple, highly controllable, and produces a composite material with stable structure and uniform loading. The biochar and CoNiFe-LDH exhibit a good synergistic effect, making it suitable for catalysis, adsorption, and energy conversion.

Acrolein is produced by selectively oxidizing iso-propanol over a first mixed metal oxide catalyst in the presence of oxygen in the vapor phase. The first mixed metal oxide catalyst comprises oxides of molybdenum and bismuth. Acrylic acid is produced by selectively oxidizing the acrolein over a second mixed metal oxide catalyst in the presence of oxygen in the vapor phase. The second mixed metal oxide catalyst has a different composition from the first mixed metal oxide catalyst.

This invention discloses a manganese-rich cathode material precursor composed of nanosheets, its preparation method, and the cathode material itself, relating to the field of lithium-ion battery materials technology. The preparation method includes adding a mixed metal salt solution, an alkaline solution, and a complexing agent solution to a reaction vessel filled with inert gas at a certain temperature. The reaction vessel contains a small amount of pure water and a complexing agent as a base liquid. The pH value, stirring speed, and reaction time of the reaction system are controlled to form nanosheet-shaped crystal nuclei. The flow rate of the metal salt solution is continuously controlled to reduce the pH value of the reaction system, and the reaction is stopped when the particle size reaches a set value. After aging for a certain period, the slurry is discharged, and solid-liquid separation is performed to obtain a precipitate. The precipitate is washed and dried to obtain the manganese-rich cathode material precursor. Using the method of this invention, primary particles with nanosheet-shaped morphology and secondary particles with good sphericity can be obtained. The preparation method is simple to operate and easy to industrialize.

This invention belongs to the field of alloy powder preparation technology, specifically relating to a method for preparing zirconium alloy powder. The preparation method includes the following steps: ball milling a mixture of zirconium rod, nickel powder, copper powder, and titanium powder to obtain a mixed metal powder; smelting the mixed metal powder at high temperature to form a zirconium alloy ingot; and then subjecting the zirconium alloy ingot to gas atomization treatment to obtain zirconium alloy powder. The zirconium alloy powder prepared by the method of this invention has a finer particle size, which facilitates sufficient diffusion during sintering, thereby improving density.

The application discloses a nitrogen-doped carbon lithium-sulfur battery positive electrode carrier material with directional pores and iron monatomic anchoring, and a preparation method and application thereof, and belongs to the technical field of lithium-sulfur battery positive electrode materials. Graphene oxide and cellulose nanofibers are dispersed in water to form a dispersion liquid; a mixed metal salt solution prepared by zinc salt and iron salt is added to the dispersion liquid, and a composite hydrogel is formed through electrostatic self-assembly; the composite hydrogel is placed on a pre-cooled metal substrate to perform directional freezing and freeze-drying, and an aerogel precursor with a directional pore structure is obtained; the aerogel precursor is subjected to programmed temperature carbonization with a solid nitrogen source, and a nitrogen-doped carbon lithium-sulfur battery positive electrode carrier material with directional pores and iron monatomic anchoring is obtained. Through the cooperation of directional freezing and gas-phase doping, vertical through pores are constructed, and iron monatomic atoms are anchored, the shuttle effect is inhibited, high specific capacity, excellent rate and long cycle life are realized, and the capacity retention rate reaches 88.5% after 600 cycles at 0.1C.

The embodiment of the present disclosure provides a MnFeAl-LDOs composite material for low-temperature NH3-SCO reaction, which is prepared by a method comprising the following steps: dissolving a manganese source, an iron source and an aluminum source in deionized water to prepare a mixed metal salt solution; wherein the molar ratio of Mn, Fe and Al is 1:(0.4-0.6):(0.4-0.6); under stirring, the mixed metal salt solution of step is added dropwise into a basic precipitator solution and a bottom solution containing sodium carbonate, the pH value of the reaction system is controlled to be 9-11, and the temperature is controlled to be 50-70 DEG C, and a coprecipitation reaction is carried out; after the reaction is completed, the obtained suspension is aged at 50-70 DEG C for 20-28 hours, and then washed and dried to obtain a MnFeAl-LDHs precursor; the MnFeAl-LDHs precursor of step is calcined at 350-450 DEG C for 4-6 hours in an air atmosphere to obtain the MnFeAl-LDOs composite material. Through the scheme of the embodiment of the present disclosure, an NH3-SCO catalyst with high NH3 conversion rate, high N2 selectivity and good sulfur resistance and water resistance under low-temperature conditions is provided.

A method of manufacturing a vehicular underbody floor assembly includes (i) overmolding a composite preform and one or more metallic sheets with an overmolded resin material to form a floor panel, the floor panel including a metallic portion and a composite portion, the metallic portion including a first flange extending along a first side of the floor panel and a second flange extending along a second side of the floor panel opposite the first side, and (ii) attaching a first end of a cross-rail to the first flange and a second end of the cross-rail to the second flange, the cross-rail including a metallic layer and a fiber layer, and the cross-rail extending between the first end and the second end and at least partially across the composite portion of the floor panel.

This invention belongs to the field of catalyst preparation technology, and provides a cobalt-gallium alloy catalyst for the hydrodeoxygenation of guaiacol to cyclohexanol, its preparation method, and its application. The preparation method includes the following steps: First, a mixed metal salt solution of cobalt and gallium sources is prepared, then carbon nanotubes are added, and the mixture is ultrasonically dispersed and refluxed. After the reaction, the catalyst is dried and reduced to obtain the catalyst CoGa / CNTs. Then, the CoGa / CNTs are mixed with an organophosphoric acid ligand solution and reacted at room temperature to obtain the organophosphonic acid ligand-modified carbon nanotube supported cobalt-gallium alloy catalyst R-PA@CoGa / CNTs. Applying the prepared catalyst R-PA@CoGa / CNTs to the hydrodeoxygenation of guaiacol to cyclohexanol achieves excellent guaiacol yield under milder reaction conditions and with a lower active metal content.

A process for the production of a mixed metal hydroxide material for use as a cathode active material precursor is described, wherein the process utilizes cavitation to produce high quality materials through elimination of some processing steps and ingredients. In particular, a method of producing a mixed metal hydroxide material combining a first metal, a second metal, an oxidant and a liquid to form a reaction slurry is disclosed. The method may include applying cavitation to the liquid prior to the formation of the reaction slurry and / or applying cavitation to the liquid when the liquid is part of the reaction slurry. A method of forming an active material and a mixed metal hydroxide material for use as an active material precursor is also disclosed.

The application discloses a method for preparing a single-atom photocatalyst from lithium ion battery waste, and products and applications thereof. The method comprises the following steps: pretreating waste ternary lithium batteries to obtain waste containing positive and negative electrode materials; performing oxygen-free roasting on the waste; performing selective extraction on the waste by using carbon dioxide water; filtering to obtain a filtrate and waste residue; evaporating and crystallizing the filtrate to obtain lithium carbonate; performing acid leaching on the waste residue to obtain a mixed metal solution; reacting the mixed metal solution with melamine and sulfuric acid to form a supramolecular precursor; and performing oxygen-free roasting on the precursor to obtain a single-atom photocatalyst. The method directly utilizes waste lithium ion batteries to prepare a high-performance single-atom photocatalyst, avoids a complicated metal separation and recovery process, and simultaneously obtains two high-value-added products, namely, lithium carbonate and a single-atom photocatalyst, and has important environmental, economic and social significance. Moreover, the method has the characteristics of low raw material cost, simple process and easy industrial application.