122 results about "Liquid alloy" patented technology

The invention relates to the technical field of preparation of high-purity boron oxide, and discloses a purification method of high-purity boron oxide and a device thereof, and the purification method comprises the following steps: step 1, mixing crude boron oxide with a liquid metal alloy, and dissolving metal impurities through gradient temperature control; 2, applying ultrasonic treatment to the mixed system, introducing a vortex field, and stripping impurities on the surface of the boron oxide; 3, a liquid metal phase and a boron oxide solid phase are separated through cooperation of a magnetic field and a pulse high-voltage electrostatic field; 4, non-metal ion impurities are removed through a gradient porous ceramic adsorption bed; and step 5, melting boron oxide in vacuum and carrying out gradient cooling crystallization. By adopting the technical scheme of a Ga-I n-Bi-Er quaternary liquid alloy system, the technical effect of selective targeted removal of metal impurities is achieved, and compared with a liquid metal system depending on single phase solubility difference in the prior art, the defect that efficient chelating and dynamic settling separation of the impurities cannot be achieved at the same time is overcome.

The invention discloses a multi-mode sensing manipulator system based on flexible electronic skin, an integration process and a test method, and the multi-mode sensing manipulator system based on the flexible electronic skin comprises a flexible electronic skin sensor attached to a manipulator; the flexible electronic skin sensor comprises a flexible sheet and a liquid alloy network arranged in the flexible sheet, the liquid alloy network comprises an SSPP structure and a piezoresistive sensing structure located on the periphery of the SSPP structure, and the SSPP is a simulated surface plasmon; the piezoresistive sensing structure is connected with the signal processing circuit through a flexible wire bar and transmits a piezoresistive signal to the processor; the SSPP structure is connected with the SDR module through a coaxial line and is connected with the processor. According to the multi-mode sensing manipulator system based on the flexible electronic skin, the integration process and the testing method, the functions of multi-dimensional force feedback, substance penetrating type sensing and dynamic curved surface adaptation are achieved.

The invention relates to the technical field of preparation of catalysts, in particular to a CuNiSn-based molten catalyst for preparing graphene and a preparation method of the CuNiSn-based molten catalyst for preparing the graphene. The preparation method comprises the steps that S1, NiO-SnO2 precursor powder is prepared; s2, NiO-SnO2 powder and copper particles are mixed, high-purity nitrogen is injected into a reactor, then the temperature is increased to 800 DEG C, heat preservation is conducted for 3-4 h, and CuNi-Sn alloy blocks are obtained after the temperature is decreased to the room temperature; and S3, a smelting furnace is preheated in advance and pumped to a high-vacuum state, the CuNi-Sn alloy block and the alloy modifier are put into a crucible and put into the smelting furnace, it is ensured that the CuNi-Sn alloy block and the alloy modifier are fully mixed with the CuNi-Sn alloy block, then heat preservation is conducted for 10-15 h, and the CuNiSn-based fusion catalyst for preparing the graphene is obtained after the CuNi-Sn alloy block is cooled to the room temperature. The low solubility and high diffusivity characteristics of Ga and the ability of In to reduce the viscosity of the Ga-Sn liquid alloy, improve the carbon diffusion kinetics and enhance the electron transfer efficiency in cooperation with a conductive network of boron-doped graphdiyne jointly act on the waste plastic cracking process, the number of carbon layers of graphene can be effectively controlled, and the specific surface area and quality of graphene can be improved.

The present application relates to a kind of for the determination method of liquid alloy density in electrostatic suspension state in space station, after obtaining the photo of liquid alloy in electrostatic suspension state in space station, first photo is converted into pixel matrix and carries out gray scale processing, then deduct photo background by matrix operation.Further, the best binary grayscale threshold of pixel matrix is calculated, and pixel matrix is carried out binary processing.Then all boundary coordinates in pixel matrix are obtained by matrix operation, and each connected boundary is distinguished.Excluding bright spot boundary, the boundary coordinates and center coordinates of liquid alloy are obtained.Then the boundary equation of liquid alloy is obtained by using multi-order Legendre equation fitting liquid alloy boundary coordinates.Finally, the volume of liquid alloy is obtained by rotating integral to the boundary equation of liquid alloy, and then the density value of liquid alloy is obtained.The density value of the present application can be obtained by processing liquid alloy photo, and can be used for the determination of containerless liquid alloy density in electrostatic suspension in space station.

The invention belongs to the field of oil and gas exploitation, geothermal exploitation and deep ground engineering, and discloses an oil and gas shaft crack plugging pressure repair material and method based on microwave heating bismuth-based alloy, the material comprises 74%-86% of bismuth-based alloy powder, 10%-15% of Fe3O4-SiO2 core-shell magnetic particles, 3%-8% of a microwave sensitizer and 1%-3% of a wetting agent. The repairing material is conveyed to the position, where shaft crack plugging repairing needs to be conducted, in the oil and gas shaft, then the repairing material is melted in a microwave heating mode, then the melted alloy is filled in shaft crack plugging, and then a rotating gradient magnetic field is used for repairing the oil and gas shaft crack. And the liquid alloy is driven to directionally migrate to a target crack area along the magnetic line, and after alloy liquid is cooled and solidified, pressure repairing of the oil and gas shaft crack plugging target position is achieved. Precise positioning, efficient filling, phase change control and complete recovery of the repairing material can be achieved in the extremely deep environment, and therefore the high-quality repairing requirement for oil and gas shaft crack plugging pressure repairing achieved through efficient liquefaction of plugging metal can be met.

The invention relates to a lanthanum oxide catalyzed high-capacity hydrogen storage alloy and a preparation method thereof, the hydrogen storage alloy comprises the following components: Mg < 85-x > Zr < x > Sm < 12-y > Nd < y > N < i < 5-z-m > Cu < z > Zn < m + n > wt.% La2O3, in the formula, x, y, z and m are atomic ratios, and 0 lt; x is less than or equal to 5, 0lt; y < = 3, 0lt; z < = 2, 0lt; m is less than or equal to 2, n is the percentage of La2O3 in the alloy, and n is more than or equal to 4 and less than or equal to 12. Preferably, the atomic ratio x: y: z: m is 3: 2: 1: 1, and n is equal to 7. The preparation method comprises the following steps: smelting by induction heating under the protection of inert gas, pouring a liquid alloy into a tundish, and continuously spraying the liquid alloy on the surface of a rotating water-cooled copper roller through a BN nozzle at the bottom of the tundish to obtain a rapidly quenched alloy with a nanocrystalline structure; and the rapidly quenched alloy is mechanically crushed and sieved, the sieved alloy powder and a certain amount of catalyst La2O3 are subjected to ball milling in an all-dimensional planetary high-energy ball mill under the protection of protective gas, and alloy powder with ultra-fine grains (nanoscale) is obtained. Through component design, microstructure regulation and control and addition of a catalyst, the thermal stability of alloy hydride is reduced, and the hydrogen absorption and desorption thermodynamic and dynamic performance of the alloy is improved.

The invention discloses a double-medium cascade liquid cooling heat dissipation system, and relates to the technical field of computer hardware heat dissipation. Comprising a cold plate assembly, a circulating pipeline and a driving unit, the cold plate assembly comprises a lower-layer cold plate and an upper-layer cold plate, the lower-layer cold plate comprises a first liquid alloy cold plate and a second liquid alloy cold plate which are located in the area, where the GPU module is located, of the mainboard chip, and the upper-layer cold plate comprises a large liquid alloy cold plate located in the area, where the CPU module and the HBM module are located, of the mainboard chip. A first water-based cold plate and a second water-based cold plate are attached to the top of the first liquid alloy cold plate and the top of the second liquid alloy cold plate respectively, and a large water-based cold plate is attached to the bottom of the large liquid alloy cold plate. According to the invention, heat balance transfer between the high heat flux area of the GPU module and the low power consumption area of the CPU module and the HBM module can be realized, heat at the GPU module is partially transferred to a large-area cold plate of the CPU module and HBM module area, the heat dissipation pressure of the GPU module area is obviously reduced, and the overall heat dissipation efficiency is improved.

The invention discloses a preparation method of a Sn-Bi-Ni-Cu quaternary liquid alloy methane cracking catalyst, production raw materials comprise composite melt metal and composite transition metal, and the mass ratio of the composite melt metal to the composite transition metal is 1: (0.3-1.2); the composite melt metal is composed of Sn and Bi according to the mass ratio of 1: (1.3-1.7); the composite transition metal is composed of Ni and Cu according to the mass ratio of 1: 0.15-1.2. The quaternary liquid alloy catalyst has the advantages that: 1) compared with the existing catalyst for hydrogen production by methane cracking, the quaternary liquid alloy catalyst provided by the invention can stably operate for more than 1000 hours in a range of normal pressure to 3MPa and air speed of 100-100mL. G <-1 >. H <-1 >, the active phase retention rate is more than 95%, and the quaternary liquid alloy catalyst is especially suitable for alkane pyrolysis hydrogen production, CO2 hydrogenation and easy carbon deposition reaction systems, and has a wide application prospect; a new material design thought and an engineering implementation scheme are provided for the field of liquid metal high-temperature catalysis; and 2) experiments show that the quaternary liquid alloy catalyst prepared by the method provided by the invention can significantly improve the carbon sequestration rate and the hydrogen yield.

The invention relates to the technical field of carbon dioxide geological utilization and storage, in particular to a sealing evaluation device and method for a low-melting-point alloy shaft plugging material, and the device comprises an observation cylinder, an outer cylinder, a simulation shaft, a gas channeling simulation mechanism, a formation pressure adjusting mechanism, a cooling mechanism, a shaft pressure adjusting mechanism and an image acquisition unit. The device is reasonable and compact in structure, alloy materials in the simulation wellbore are in an alloy melting stage, the sealing ejector pin prevents liquid alloy from flowing into the first gas injection hole, and after the alloy materials in the simulation wellbore are solidified, the sealing ejector pin is moved downwards, so that the upper end of the sealing ejector pin is located below the first gas injection hole, and the gas channeling simulation mechanism is communicated with the lower portion of the simulation wellbore; when the formation pressure adjusting mechanism works, the formation pressure adjusting mechanism is connected with the confining pressure cavity through the pressurizing hole, the simulation effect on the formation pressure around the simulation shaft can be achieved, the heating melting-cooling forming process of the low-melting-point alloy material is achieved, and the sealing capacity of the alloy plug-sleeve combination body under the actual underground working condition is evaluated.

This invention provides a fully open, long-endurance Mars battery and its fabrication method. The Mars battery comprises a vertical serpentine cell, an insertable anode current collector, a mesh cathode current collector, and a dustproof and breathable membrane. The fabrication scheme is as follows: preparation and assembly of the serpentine tubular solid electrolyte, preparation and coating of a gas diffusion and gas reaction dual-functional layer, preparation and filling of a Na / K-containing liquid alloy, integration of the rod-shaped anode and mesh cathode current collectors, and encapsulation with the dustproof and breathable membrane. The gas diffusion and gas reaction dual-functional layer is uniformly coated on the outside of the serpentine electrolyte tube, thus providing a 360° contact surface with the Martian atmosphere and exhibiting a fully open cathode characteristic, resulting in superior energy density compared to batteries with traditional single-sided gas reaction electrodes. This invention combines the advantages of solid electrolyte-based batteries—openness under the low atmospheric pressure of Mars—and the ability of the liquid alloy to fully wet the interface, coupled with the protection of the dustproof and breathable membrane, which will promote the design and development of long-endurance, all-weather Mars batteries.

The invention discloses a preparation method of a titanium alloy containing a dispersed nano precipitated phase. The method comprises the following steps: 1, heating and melting a spherical titanium alloy in an electrostatic suspension device; secondly, the spherical titanium alloy is melted and overheated, the laser is turned off after heat preservation, and when the liquid alloy melt is solidified again and the temperature drops, the laser is turned on again, and the process is repeated, so that the liquid alloy melt reaches the preset supercooling degree; thirdly, the liquid alloy melt is rapidly solidified at the preset supercooling degree; fourthly, the static suspension system is closed, and products fall into a container containing the liquid alloy to be cooled; and 5, packaging the cooled product, and then carrying out heat treatment. According to the method, the rapid solidification coupling heat treatment process is adopted, the distribution and size of the precipitated phase of the titanium alloy are effectively regulated and controlled through the genetic effect of the solidification structure, the titanium alloy containing the dispersed nanometer precipitated phase is obtained, collaborative optimization of the strength and plasticity of the titanium alloy is achieved, and the method is suitable for the field of aerospace.

The invention discloses a preparation method of Bi-In-Sn liquid metal dispersed particles, and belongs to the technical field of liquid metal, the method comprises the following steps: heating and melting bulk Bi-In-Sn alloy; adding a PVA (Polyvinyl Alcohol) solution which submerges the liquid alloy and carrying out secondary melting; stirring at a high speed until liquid particles are formed, and forming hydrogen bond auxiliary dispersion by PVA hydroxyl and a particle oxide layer; after the particles are solidified, washing with deionized water to remove PVA; and carrying out freeze drying or natural drying to obtain 40-500 [mu] m particles. According to the invention, only conventional heating and stirring equipment is needed, batch preparation can be realized within 10 minutes, the cost is low, the particle size of the particles is controllable, the particles are uniformly dispersed, and the large demand on low-temperature Bi-In-Sn particles in the fields of bone medicine and the like can be met.

The utility model relates to the technical field of lens manufacturing, in particular to a balsaming lens manufacturing gripping device which comprises an installation shell, an electric push rod is installed on the side of the installation shell, and a push block is arranged on the rear side of the inner wall of the installation shell. According to the utility model, the electric push rod pushes the push block back and forth and cooperates with the guide sliding block to guide and slide along the track of the guide groove, so that the two movable rods can be assisted to rotate by taking the connection position of the movable rods and the inner bottom wall of the mounting shell as a fixed point, and the two pieces of elastic silica gel can clamp lenses with different specifications; a controller connected with equipment can heat the internal Field alloy to be in a liquid state or a soft state, so that the elastic silica gel can deform to wrap the surface of the lens, the liquid alloy flows under pressure in the wrapping stage and adapts to the outline of a filling body, seamless clamping is achieved, then the alloy is cooled through a micro fan, heating of the alloy is stopped, and the alloy is rapidly solidified. A rigid structure is formed to cooperate with the concave-convex strips to lock the object.

The invention discloses a paste lithium metal negative electrode material as well as a preparation method and application thereof, belongs to the technical field of solid-state batteries, and solves the problem that the overall electrochemical impedance of a solid-state battery of a lithium metal electrode in the prior art is large and the exertion of electrochemical performance is influenced. The paste lithium metal negative electrode material is characterized by comprising lithium powder, a liquid alloy and a surface tension regulator, the mass ratio of the lithium powder to the liquid alloy to the surface tension regulator is (0.5-7): (2-8.5): 1. The pasty lithium metal negative electrode material is pasty on the whole at room temperature or low temperature, has good plastic deformation capacity and relatively strong adhesive force, can effectively solve the problem of poor interface contact, effectively reduces the migration resistance and deposition potential energy of lithium ions, and enhances the stability of the interface; meanwhile, compared with an interface modification layer which is made of liquid alloy in the prior art, the charge transfer process of the lithium ions on multiple phase interfaces is avoided, and the lithium ion battery has better charge transfer dynamics.

A method for manufacturing a metal solid-to-metal solid bonded body, capable of improving a bond strength on a bonding face, and a composite member. A solid metal body containing a first component is brought into contact with a solid metal material composed of a compound, an alloy, or a non-equilibrium alloy, which contains both a second component and a third component having positive and negative heats of mixing respectively relative to the first component, and heated at a predetermined temperature for a predetermined time while applying a predetermined pressure to between the metal body and the metal material. Thereby, the first component and the third component are interdiffused with each other, and a liquid alloy containing the first component and the third component, which has been generated in a region where the first component and the third component have interdiffused with each other, is discharged.

The present application relates to the technical field of battery thermal management, in particular to a preparation method of a thermal activation battery with silicon-aluminum alloy high-temperature phase change material; in the preparation method, a certain amount of aluminum powder and silicon powder are selected as raw materials and mixed to obtain a liquid alloy by heating, the liquid alloy is defoamed and degranulated, and finally the bulk alloy is cooled to obtain a block alloy, the block alloy is sliced according to the size to obtain a sheet material, and the sheet material is assembled into the battery body in a layer insertion manner; the alloy phase change material prepared by the present scheme has high thermal conductivity, suitable phase change temperature and phase change enthalpy value, thereby having strong thermal management efficiency, being beneficial to regulating and controlling the surface temperature of the battery and prolonging the service life of the battery; in the present scheme, the alloy phase change material is cut and assembled into the thermal activation battery, and has the advantages of low cost, simple operation, good use effect and the like.

The application discloses a self-repairing flexible bionic composite material with high tear resistance and a preparation method thereof. The method is characterized in that a room-temperature self-repairing flexible polyurea elastomer SSPU is prepared by reacting THI, DBI and PDMS. The self-repairing flexible bionic composite material with high tear resistance is prepared by physically mixing the room-temperature self-repairing flexible polyurea elastomer SSPU and a gallium-indium-tin liquid alloy. The self-repairing flexible bionic composite material has the advantages of not affecting the flexibility of the material, greatly improving the tear resistance of the material, and having excellent photo-thermal response characteristics and fast photo-thermal repair capacity, and is suitable for preparing various stretchable and functional devices.

The invention discloses nano samarium oxide dispersion strengthened NiCoCrAlY alloy powder and a preparation method thereof, and relates to the technical field of alloy powder preparation. The method specifically comprises the following steps that a NiCoCrAlY alloy bar is smelted, then heat preservation is conducted, and a liquid alloy melt is obtained; the liquid alloy melt is subjected to high-pressure inert gas atomization powder preparation, nano samarium oxide flow perpendicular to the liquid flow direction of the alloy melt is synchronously introduced in the powder preparation process, high-temperature alloy liquid drops formed during atomization are impacted and wrapped, and target powder is obtained; performing hot isostatic pressing on the target powder to obtain a target alloy bar; a target alloy bar is repeatedly subjected to multiple smelting, high-pressure inert gas atomization powder manufacturing and hot isostatic pressing treatment, an alloy bar is obtained, then the alloy bar is subjected to high-pressure inert gas atomization powder manufacturing, and the nanometer samarium oxide dispersion strengthening type NiCoCrAlY alloy powder is obtained. By adopting the preparation method disclosed by the invention, the nano samarium oxide dispersion strengthened NiCoCrAlY alloy powder with excellent morphology, nano samarium oxide dispersity and purity can be obtained.

The invention relates to the technical field of heat dissipation materials, in particular to a Bi-In-Sn liquid metal phase change material for chip heat dissipation, a preparation method and a heat dissipation device, and is technically characterized in that the liquid metal phase change material is prepared from the following elements in percentage by mass: 42.0%-48.0% of Bi, 33.0%-40.0% of In and 12%-25% of Sn; the preparation method comprises the following steps: weighing Bi, In and Sn metal particles, and sequentially carrying out acid pickling, ultrasonic cleaning and drying treatment; under the high-purity argon protection environment, the pretreated metal particles are subjected to vacuum melting and stirring, and uniform liquid alloy is formed; and after the liquid alloy is cooled and formed, ultrasonic treatment is conducted, the Bi-In-Sn liquid metal phase change material is prepared, the advantage of low melting point is kept, meanwhile, unexpected improvement of latent heat performance is achieved, and the bottleneck problem of instantaneous thermal runaway of a chip in an extreme environment is effectively solved.

The utility model relates to the technical field of flow regulating valves, and discloses a high-temperature lead-bismuth liquid alloy flow regulating valve. A buffer device is arranged on a valve body of the flow regulating valve; the two ends of the buffering device are detachably connected to the input end and the output end of the valve body correspondingly so that the positive and negative water hammer effect occurring when the flow adjusting valve is closed and opened can be relieved. According to the flow regulating valve, the buffer device is arranged on the valve body of the flow regulating valve, the two ends of the buffer device are detachably connected to the input end and the output end of the valve body correspondingly, so that the positive and negative water hammer effect occurring when the flow regulating valve is closed and opened is relieved, and the problem of pipeline maintenance caused by pipeline vibration caused by the water hammer effect is solved.

The invention mainly relates to the technical field of metallurgy. In order to improve the precision and stability of a liquid alloy casting instantaneous flow monitoring result, the invention provides a liquid alloy casting flow monitoring method and system in the metallurgical casting process, and the core idea of the method is that a crucible and a casting mold are connected through a wire, so that a serial current loop is formed among liquid alloy in the casting process, the connected crucible and the casting mold; a constant-voltage power supply and an ampere meter are connected into the current loop; the ampere meter measures the real-time current intensity I of the current loop under the action of the constant-voltage power supply in real time; the instantaneous flow Q of the alloy is calculated based on the real-time current intensity of the current loop, the resistivity of the alloy, the length L of the alloy liquid flow between the pouring gate and the casting mold and the vertical distance h between the pouring gate and the casting mold, and the calculation result is higher in accuracy and stability.

A micro-nanostructured lithium-silicon alloy negative electrode material and its preparation method and application, wherein the method comprises: weighing lithium metal and silicon in an atomic ratio of 99.5:0.5 to 97.5:1.5 as raw materials; placing the weighed and mixed raw materials into the cabin of a smelting and stripping device, melting the raw materials by heating under an argon protective atmosphere to form a liquid alloy, then spray-casting the liquid alloy, and collecting the material by a copper roller at a linear speed of 35-40m / sec; rolling the product collected on the copper roller into a thin sheet with a thickness of 100-300um, and cutting it to obtain a micro-nanostructured lithium-silicon alloy negative electrode material. The present invention introduces silicon element and utilizes a smelting and stripping rapid quenching process to construct a lithium-silicon alloy negative electrode material with a micro-nanostructure. The lithium-silicon alloy exhibits a unique three-dimensional network skeleton with good structural organization. This micro-nanostructure provides a large specific surface area, which is conducive to improving the mechanical strength and stability of the electrode material as a whole.

The present application relates to a kind of Ga-Fe base liquid alloy catalyst and its preparation method and application, the Ga-Fe base liquid alloy catalyst includes metal Ga, metal Fe and metal M, the metal M is one of Ti, Mn, Co, Ni, Cu, Zr, Nb, Mo, W.The Ga-Fe base liquid alloy catalyst provided in the present application is with metal Ga as matrix, with metal Fe and metal M as active catalytic site, based on metal Ga can be mutually soluble with other metals and form low melting point alloy characteristics, so that in the alloy catalyst formed can become liquid at reaction temperature and carry out reaction, due to the flow characteristics of liquid, it is advantageous to the metal active component of synthesis ammonia constantly refreshes at interface, so that nitrogen and hydrogen and metal Fe, metal M contact more fully, mass transfer efficiency is higher, and the phenomenon of traditional solid catalyst active site poisoning deactivation does not occur, so that N2 and H2 can effectively react to generate ammonia under low temperature and low pressure conditions.

This application provides a method for enhanced precious metal recovery and full-component utilization through plasma synergistic melting, relating to the field of solid waste recycling. The method involves first mixing solid waste and a reducing agent to obtain a first mixture; then, under a working atmosphere, plasma melting of the first mixture yields high-temperature liquid slag, a liquid matte phase, and a liquid alloy phase; the liquid matte phase and the liquid alloy phase are respectively subjected to hydrometallurgical recovery of precious metals; the high-temperature liquid slag is water-quenched to obtain glass frit; the glass frit is ground and dried to obtain treated glass frit; the treated glass frit and a binder solution are second-mixed to obtain a second mixture; the second mixture is then molded and heat-treated to obtain microcrystalline glass; the solid waste includes waste automotive catalysts, flue gas desulfurization gypsum slag and cyanide tailings, and / or sulfuric acid slag. This method utilizes plasma melting technology to synergistically process multiple complex secondary resources, achieving efficient enrichment of precious metals and high-value conversion of all material components.

The invention discloses a preparation method of a high-temperature lead-bismuth liquid alloy valve, and belongs to the technical field of preparation of special valves, and the method comprises the following steps: firstly, constructing an accessory library equipped with real-time detection equipment, and meanwhile, establishing an initial three-dimensional accessory model database associated with detection data; according to valve process requirements, valve group data are called, assembly constraint verification is completed, and a three-dimensional target model and assembly process parameters are automatically generated; and finally, automatic assembly control logic is issued, and an execution unit is driven to complete automatic welding machining. The full-process data closed-loop management and control from accessory warehousing to finished product assembling are realized, the problems of data splitting, poor traceability and easy inflow of unqualified accessories in a traditional preparation link are solved, meanwhile, adaptation hidden dangers are checked in advance through digital verification, the limitation of manual design is broken through, the product percent of pass is greatly improved, the reworking cost is reduced, the production efficiency is improved, and the production cost is reduced. And a reliable basis is provided for high-quality preparation of the high-temperature lead-bismuth liquid alloy valve.

The present invention relates to a magnetically driven flexible circulation heat dissipation system and heat dissipation device, comprising a fluid pipeline for introducing a liquid metal fluid working medium, a plurality of metal coils, and an electromagnetic pump. The plurality of metal coils are spaced apart and sleeved on the fluid pipeline, and the electromagnetic pump is mounted on the fluid pipeline. The liquid metal fluid working medium comprises liquid metal or liquid alloy with added magnetic particles. The present invention utilizes the force exerted by a current-carrying conductor in a magnetic field to drive the liquid metal to circulate for heat dissipation. The electromagnetic drive pump is combined with a multi-stage coil drive method to drive the magnetic liquid metal working medium to circulate for heat dissipation, thereby achieving stronger circulation drive capability. Furthermore, the system lacks the rotating parts of traditional pumps, resulting in high reliability. Furthermore, the thermal conductivity of liquid metal is much higher than that of liquid water, significantly improving the system's heat transfer capacity and heat dissipation effect.

The present application belongs to the field of metal materials, and particularly relates to a preparation method of a second-phase reinforced copper alloy. Main steps are as follows: a molten copper alloy is poured into two sizing nozzles through an intermediate pouring, and a spray ring is designed at the outlet of the nozzles. The spray ring uniformly disperses the liquid alloy after spraying high-speed gas and solid-phase powder, the solid phase acts as a coolant and nucleating agent, and the dispersed solid-liquid mixture is solidified into an ingot blank on a rotating deposition disc. The solidification process is carried out in a negative pressure environment below 3000 Pa, so as to eliminate solidification porosity and shrinkage. Uniform second-phase particles exist in the final ingot blank, so as to greatly improve the strength and wear resistance of the matrix.

The invention discloses a low-carbon and energy-saving ore reduction method and device. Comprising the following steps: removing adsorbed water of a raw material by using waste heat of furnace gas, removing residual crystal water in the raw material by using the furnace gas generated by self reaction, performing pre-reduction, melt separation and deep reduction on metal oxide, preparing mixed high-temperature gas, continuously injecting the prepared liquid alloy into a high-frequency molten iron condenser at a constant flow rate, casting and the like. The physical sensible heat and chemical heat of the high-temperature reducing gas are fully utilized to heat the raw materials, and the high-temperature reducing gas is efficiently utilized; elements such as iron and nickel in the raw materials are subjected to solid-state reduction by fully utilizing carbon monoxide and hydrogen generated by chemical reaction in the lower hearth furnace, so that energy conservation, carbon reduction and emission reduction are realized; the temperature of the melting reaction zone is uniform, and under strong electromagnetic stirring, the heat transfer speed is high, the temperature gradient in the furnace is low, and the temperature equalization time is short; and the power consumption per unit product and the comprehensive energy consumption are respectively reduced by more than 20% and 26% compared with the national first-grade energy consumption limit.

The application provides a slow heat-storage-heat conduction synergic temperature control anti-cracking cement-based material and a preparation method thereof, and relates to the technical field of cement-based building materials. The material constructs a slow heat-storage-heat conduction synergic temperature control system by introducing a slow heat polymer, phase change capsules with different phase change temperature thresholds and liquid alloy heat conduction materials into a cement base. The slow heat polymer is used for delaying the early hydration reaction of cement and reducing the initial heat release rate. The phase change capsules with different phase change temperature thresholds absorb hydration heat in stages during the hydration process, realizing the step-by-step regulation of hydration temperature rise. The liquid alloy heat conduction material has the characteristics of phase change heat storage and high heat conduction, and can form an efficient heat transfer channel in the cement base, promote the uniform diffusion of heat and reduce the local temperature gradient. The synergistic effect of the three makes the hydration heat release peak present a hump distribution, effectively inhibits the temperature rise peak and temperature stress in the hydration process of cement, and significantly improves the anti-cracking performance of the cement-based material.

The utility model discloses a multifunctional adjustable dry sand box for a 3D printing sand mold. The multifunctional adjustable dry sand box comprises a bottom plate, a pair of L-shaped baffles, a cover plate and a limiting assembly. The bottom plate is rectangular, the baffles are spliced into a rectangular fence through screws and installed on the bottom plate, and triangular reinforcing blocks are arranged on the inner sides of the baffles to enhance rigidity. The cover plate is detachably installed on the fence, and the cover plate, the bottom plate and the fence jointly form the dry sand box. The limiting assemblies are arranged in the dry sand box in an array mode and used for limiting the sand mold, and the position precision of the sand mold in the 3D printing process is ensured. And the baffle is provided with the turnup and is detachably connected with the cover plate, the bottom plate and the other baffle through the mounting holes, so that the structural stability is enhanced. A round hole is formed in the middle of the bottom plate so that liquid alloy can be conveniently injected into a sand mold. Supporting strips and lifting handles are arranged on the outer sides of the baffles, and carrying and operation are convenient. Through the detachable structure and the adjustable limiting assembly, the device is suitable for sand molds with different sizes, the part taking process is simplified, the production efficiency is improved, and the maintenance cost is reduced.