63 results about "Diffusion reaction" patented technology

The invention discloses a method for preparing a sintered neodymium-iron-boron magnet by graded recovery of neodymium-iron-boron oil sludge waste, which comprises the following steps of: 1, wet-grinding, screening, centrifuging and drying the oil sludge waste to obtain coarse oil sludge and fine oil sludge; 2, carrying out vacuum degreasing and hydrogen reduction on the coarse and fine oil sludge to obtain a coarse and fine hydrogen reduction phase; 3, performing element adjustment on the hydrogen reduction phases of the coarse powder and the fine powder, mixing with a reducing agent and fused salt, and performing reduction diffusion reaction to obtain recycled magnetic powder and rare earth-rich magnetic powder; and step 4, mixing the recycled magnetic powder and the rare earth-rich magnetic powder, and carrying out orientation compression and sintering to obtain the recycled magnet. According to the method, the oil sludge waste is subjected to wet grinding and screening to complete impurity removal, crushing and grading, the same technology is adopted, the recycled magnetic powder and the rare earth-rich magnetic powder are synchronously prepared, the rare earth-rich magnetic powder replaces a traditional rare earth-rich phase and is directly mixed with the recycled magnetic powder to be sintered, the recycled neodymium-iron-boron magnet is obtained, and the method is suitable for the technical field of rare earth permanent magnet waste recycling and reusing.

The invention discloses a Cu and secondary aluminum cast-rolling solid-liquid composite material and a preparation method thereof, and relates to the field of metal recycling, the Cu and secondary aluminum cast-rolling solid-liquid composite material comprises a Cu layer and a secondary aluminum layer, and the Cu layer and the secondary aluminum layer form metallurgical bonding at an interface through a cast-rolling process; a diffusion bonding layer with components changing in a gradient manner exists at the interface, the thickness of the diffusion bonding layer is 5-50 microns, and a continuous or discontinuous intermetallic compound layer is generated in the diffusion bonding layer; according to the Cu and secondary aluminum cast-rolling solid-liquid composite material and the preparation method thereof, through a pre-oxidation-cast-rolling composite technology, a compact Cu2O film is prepared on the surface of Cu in advance, and a controllable reduction-diffusion reaction occurs when the compact Cu2O film makes contact with a secondary aluminum melt; according to the process, an interface barrier is removed, and newly-generated active Cu atoms and Al atoms form a diffusion bonding layer with components changing in a gradient mode under rapid cooling and pressure of a casting roller.

The utility model discloses a boron diffusion reaction intake system and reaction equipment, the boron diffusion reaction intake system comprises a boron source intake assembly and a reaction intake assembly, the boron source intake assembly comprises a first intake pipe, a first intake port is used for introducing a boron source, the first intake port is used for directly communicating with a reaction cavity, and the reaction intake assembly comprises a second intake pipe; the reaction gas inlet assembly comprises at least one second gas inlet pipe, a second gas inlet is used for introducing oxygen or nitrogen, and the second gas inlet pipe is isolated from the first gas inlet pipe; the reaction equipment comprises the boron diffusion reaction gas inlet system. According to the utility model, the first gas inlet pipe and the second gas inlet pipe are isolated from each other, and a boron source and other reaction gases are respectively fed through the first gas inlet pipe and the second gas inlet pipe, so that the boron source gas and oxygen are prevented from being mixed outside the reaction cavity, and the possibility that the boron source gas and the reaction gases react in advance before entering the reaction cavity is reduced; the influence of a gas inlet mode on a gas field in the reaction cavity is reduced, and the uniformity of sheet resistance of the silicon wafer is improved.

The invention discloses a brazing method for an in-situ synthesis titanium-rich phase reinforced ceramic / metal joint. According to the method, the controllable in-situ reaction is realized in the ceramic-metal joint by designing the multi-element alloy brazing filler metal containing the Ti active element and matching with the gradient temperature control brazing process. The method specifically comprises the following steps: preparing multi-element alloy foil brazing filler metal containing 0.1-10wt.% of Ti; carrying out surface pretreatment on the connection surface; vacuum brazing is carried out by adopting two-section type heating and three-section type controlled cooling; and a titanium-rich reinforcement phase of 0.1-5 microns is generated in situ in the welding seam through a Ti element diffusion reaction. The method effectively solves the key technical problems that the mechanical strength of a ceramic / metal heterogeneous joint is reduced due to insufficient weld joint strength and concentrated accumulation of residual stress of the joint, and the like, and is particularly suitable for reliable connection requirements of precise components in the fields of aerospace, energy equipment and the like.

The invention discloses a method for preparing neodymium iron boron magnetic powder by a chemical method, which comprises the following steps of: 1, mixing iron salt, an organic ligand and a solvent for coordination reaction to obtain an iron-based metal organic framework material; 2, dipping the iron-based metal organic framework material in the rare earth-fused salt mixed solution, and drying to obtain a dipping precursor; step 3, carrying out calcination and reduction reaction on the impregnated precursor to obtain a rare earth-iron precursor; and 4, mixing the rare earth-iron precursor with a reducing agent, and carrying out a reduction diffusion reaction. According to the method, an iron-based metal organic framework material is used as an iron source and a template, a dipping process is combined, a highly uniform and dispersed dipping precursor is obtained, the refined spherical neodymium iron boron magnetic powder is obtained through calcination, hydrogen reduction and a reduction diffusion reaction, and the magnetic powder is controllable in component and high in magnetic conductivity. The method is suitable for preparing the neodymium-iron-boron magnet with excellent magnetic performance and adjusting the composition and grain boundary distribution of the neodymium-iron-boron magnet.

The present invention discloses a lightweight and high-strength Fe-Al composite plate for a finned tube radiator, its preparation method and application, belonging to the technical field of layered products composed of metals. The preparation method of the present invention includes the following steps: (1) Metal material treatment: Prepare iron sheets and aluminum sheets, and polish the two metal sheets until polished stripes with the same direction appear; Stack the polished iron sheets and aluminum sheets alternately and keep the polished stripes in the same direction to obtain a laminated blank; (2) Room temperature pre-bonding: The laminated blank is rolled to obtain an intermediate material preliminarily bonded at room temperature; (3) High-temperature diffusion bonding: The intermediate material is heat-insulated at a certain temperature, immediately taken out after the treatment and hot-rolled to obtain a lightweight and high-strength Fe-Al composite plate. Through rolling, the surface of the sheet metal is broken and mechanically meshed, and diffusion reaction occurs during heat preservation to generate an intermetallic compound layer, and pores are eliminated to make the interface better bonded, so that the finished product has good tensile properties.

This invention relates to the field of metal matrix composite material preparation technology, and discloses a method for preparing a bundled vanadium carbide reinforced steel matrix composite material, comprising: immersing vanadium wire in a pretreatment chemical isolation liquid and drying it to form a precursor solid film on the surface; fabricating a preform from the vanadium wire with the solid film on the surface using a three-dimensional orthogonal weaving process; placing the preform in a vacuum sintering furnace and heating it to complete solid-phase pre-alloying; fixing the preform in a mold and preheating it under a protective atmosphere; melting a high-carbon steel matrix material until it is completely liquefied, injecting it into the mold to immerse the preform, and cooling it to obtain a composite preform block; subjecting the composite preform block to in-situ reaction diffusion heat treatment to obtain the composite material. This invention prevents the thermal loss of vanadium wire during liquid casting and, through in-situ diffusion reaction, allows the generated vanadium carbide to inherit the initial weaving morphology, achieving a three-dimensional bundled uniform distribution of the reinforcing phase within the steel matrix.

The invention relates to a preparation method and application of a Turing-shaped high-entropy alloy catalyst under an interlayer confinement range, and belongs to the technical field of catalyst preparation and electro-catalysis. According to the method, materials are ingeniously taken, commercialized crystalline flake graphite which is low in cost and resistant to acid and alkali corrosion is particularly selected to be combined with aniline to assist metal salt cation coordination, and simple mixing and sufficient intercalation are conducted firstly. And finally, performing in-situ pyrolysis on the metal salt ions confined between the carbon layers through low-temperature heat treatment, and promoting the formation of a Turing structure pattern with uniform size and uniform distribution by virtue of a confinement diffusion-reaction mechanism, so as to successfully obtain the Turing-shaped high-entropy alloy catalyst. In a performance test, the catalyst shows excellent three-function electro-catalysis HER / ORR / OER activity and stability under an alkaline medium. Furthermore, an oxygen electricity-hydrogen electricity sustainable energy system based on self-driving of the metal-air battery is constructed by virtue of the excellent multifunctional catalytic performance of the catalyst.

The invention provides a visualization method for a nanofiltration membrane interfacial polymerization diffusion reaction process. The method comprises the following steps: preparing a piperazine PI P solution, a trimesoyl chloride TMC solution and a dansyl chloride DNSCL solution with specified concentrations; the preparation method comprises the following steps: uniformly mixing a dansyl chloride DNSCL solution and a piperazine PI P solution; the dansyl chloride fluorescent agent is introduced on the basis of a special molecular structure of a water-phase monomer necessary for preparation of the nanofiltration membrane, and PI P is subjected to fluorescence labeling, so that the PI P has fluorescence characteristics and observability, and the problem that microcosmic observation cannot be performed on water-phase monomer molecules of the nanofiltration membrane at present is solved; based on the cover glass and the glass slide of special specifications, after special treatment, a reaction interface is created for observation of interfacial polymerization reaction, the problem that the two-phase monomer substance reaction interface of the nanofiltration membrane cannot be defined is solved, meanwhile, the observation position accuracy is greatly improved, and the situation that the reaction interface cannot be found during observation is prevented.

This invention discloses a method, system, equipment, and medium for controlling pollutant concentration in wastewater pipe networks, relating to the field of drainage system technology. The method includes: obtaining the mass flushing rate of pollutants under pipe scouring; collecting the amount of components generated by chemical reactions within the pipe; constructing a pollutant reaction model; and, based on convection diffusion, obtaining the concentration changes of sediments following wastewater, constructing a convection diffusion reaction model. The mass flushing rate, pollutant reaction model, and convection diffusion reaction model are coupled to obtain a pollutant concentration prediction coupling model. The pollutant concentration in the wastewater pipe network is predicted based on the pollutant concentration prediction coupling model, and the pollutant concentration is divided into multiple levels. Different flushing methods are selected within different levels to control the pollutant concentration in the wastewater pipe network. This invention can adopt different methods according to different actual scenarios, thereby controlling the pollutant concentration within a reasonable range.

The utility model discloses a movable aquaculture sediment treatment device. The movable aquaculture sediment treatment device comprises a frame, wheels are arranged at the bottom of the frame; a collecting mechanism, a pretreatment tank and a reaction tank are arranged on the frame; an ozone contact tower is arranged between the pretreatment tank and the reaction tank; an organic matter adsorption layer is arranged in the reaction tank; the ozone contact tower comprises a porous diffusion reactor. The device is of an integrated movable structure, is high in practicability and convenient to operate, improves the working efficiency, accelerates the repairing speed, reduces the use amount of ozone, improves the utilization rate of the ozone, catalyzes the ozone by using the organic matter adsorption layer, and realizes bottom mud disinfection and antibiotic degradation.

The invention discloses a zero-dimensional inorganic metal halide luminescent material as well as a preparation method and application thereof, and belongs to the technical field of photoluminescent materials. The chemical formula of the material is K3SbCl6, the crystal structure of the material is composed of isolated [SbCl6] 3-octahedron and K < + > ions, and typical 0D structural characteristics are shown; k3SbCl6 can emit bright yellow fluorescence under the excitation of ultraviolet light, and shows excellent optical properties, including a remarkable broadband emission characteristic and an ultra-high photoluminescence quantum yield close to 100%. The material is synthesized by adopting a room-temperature solid-state interface diffusion method, a potassium-containing compound and an antimony-containing compound are in close contact under a room-temperature condition, and efficient synthesis of K3SbCl6 can be realized by utilizing an interface diffusion reaction between the potassium-containing compound and the antimony-containing compound; the method does not need harsh synthesis conditions such as high temperature and high pressure, significantly reduces the process complexity and energy consumption, and has good industrial application prospects.

A method for coating high-aspect-ratio (HAR) and high-surface-area (HSA) substrates via atomic layer deposition (ALD) wherein the temperature of the substrate is varied cyclically during the ALD process. An exemplary temperature schedule for each ALD cycle includes at least one predetermined lower temperature during a diffusion / reaction stage of the cycle, where the lower temperature prevents decomposition of the ALD precursors and further prevents other side reactions, and further includes at least one predetermined higher temperature during a purge stage of the cycle, where the higher temperature enables rapid purging of excess precursor and / or byproducts produced during the reaction stage of the cycle. The prevention of side reactions ensures that the ALD coating is uniform and has the desired composition with minimal impurities, and the rapid purging ensures reasonable total process time.

The invention relates to an intermetallic compound back electrode preparation method, an intermetallic compound back electrode and a perovskite solar cell, and the method comprises the steps: preparing an intermetallic compound raw material in a vacuum melting manner; the intermetallic compound back electrode is prepared from an intermetallic compound raw material by any one of vacuum evaporation, electron beam evaporation or magnetron sputtering. The conductivity of the intermetallic compound electrode is higher than that of a carbon electrode, a transparent conductive compound and the like, so that low series resistance of the perovskite solar cell can be ensured. The high corrosion resistance and stability of the intermetallic compound are utilized to solve the problem of diffusion reaction between the halide and the metal back electrode in the existing perovskite cell, and the long-term stability of the perovskite solar cell is realized.

This invention discloses a method, device, system, and storage medium for predicting the thermo-oxidative aging performance of polyamide, including: acquiring experimental data of polyamide thermo-oxidative aging under various coupled conditions such as oxygen pressure, temperature, and sample thickness, and the corresponding tensile strength retention rate; constructing a modified response prediction closed-form formula based on the diffusion-reaction synergistic mechanism and introducing it as a soft physics constraint into the model; employing a multi-objective joint training strategy to simultaneously minimize data fitting error and physical equation residuals; evaluating and visualizing the performance of the trained model, solving for and outputting the model parameters. Using the technical solution of this invention, PINN driven by the reaction-diffusion synergistic closed-form formula is used to predict the thermo-oxidative aging performance of polyamide under multiple coupled conditions.

The application provides a method for boron diffusion of monocrystalline silicon, which comprises the following steps: pretreating monocrystalline silicon, growing a boron-affinity thin film layer on the monocrystalline silicon to obtain monocrystalline silicon with a boron-affinity thin film layer on the surface; reacting the monocrystalline silicon with the boron-affinity thin film layer on the surface in the presence of oxygen and a boron source to obtain a B2O3 thin film layer covering the boron-affinity thin film layer; performing a first boron diffusion reaction on the monocrystalline silicon with the two thin film layers under an oxygen-free condition, cooling, removing the film, performing a second boron diffusion reaction in the presence of oxygen, and then performing a boron removal reaction on the monocrystalline silicon in the presence of nitrogen and hydrogen to obtain boron-diffused monocrystalline silicon. The boron-affinity thin film layer and hydrogen-assisted propulsion technology are used to realize deep PN junction and high boron diffusion effect of sheet resistance under the condition that the temperature is not higher than 940 DEG C, the damage of high temperature to the silicon wafer body is effectively avoided, the conversion efficiency of the solar cell is improved, and convenience is provided for subsequent production of solar cells with complex structures.

To provide a clad structure and battery terminal component that easily ensure bonding strength between aluminum and copper materials without requiring a diffusion reaction suppression layer composed of Ni, and which offers long-term reliability even for battery applications such as in automobiles.SOLUTION: A clad structure has a first shaft portion including a first shaft outer surface extending downward and a first shaft bottom surface at the downwardly extending end, and a flange portion having a flange top surface and a flange bottom surface extending radially from the upper end of the first shaft portion and perpendicular to the first shaft portion. A clad structure has a first surface made of an aluminum alloy material extends from the flange outer surface to the flange upper surface, and a second surface made of a copper material extends from the flange outer surface to the flange lower surface. An aluminum material containing 99 mass% or more of Al is present between the aluminum alloy material and the copper material. A battery terminal component uses the clad structure.SELECTED DRAWING: Figure 1

According to the copper-tungsten carbide electric contact material and the preparation method thereof, a nano titanium carbide transition layer capable of forming strong metallurgical bonding with WC and Cu is generated on the surface of tungsten carbide particles in situ through a collaborative process of ball milling coating and reduction diffusion reaction. According to the gradient interface structure, loads can be efficiently transmitted, WC particles are effectively prevented from being peeled off from a base body under electric arc impact, the electric arc ablation resistance of the material is improved by 70% or above compared with a traditional CuWC material, and the service life of a contact is greatly prolonged.

The invention provides a method for carrying out boron diffusion on monocrystalline silicon, which comprises the following steps: carrying out pretreatment on monocrystalline silicon, and growing a boron-loving thin film layer to obtain monocrystalline silicon of which the surface is a boron-loving thin film layer; reacting the monocrystalline silicon with the boron-loving thin film layer on the surface in the presence of oxygen and a boron source to obtain a B2O3 thin film layer covering the boron-loving thin film layer; the method comprises the following steps: carrying out a first boron diffusion reaction on monocrystalline silicon subjected to two times of film layer growth under an oxygen-free condition, carrying out cooling and film removal, carrying out a second boron diffusion reaction in the presence of oxygen, and carrying out a boron elimination reaction on the monocrystalline silicon under nitrogen and hydrogen conditions to obtain the boron-diffused monocrystalline silicon. According to the invention, the boron-loving thin film layer and the hydrogen-assisted propulsion technology are utilized, a deep PN junction and a high-sheet-resistance boron diffusion effect are realized under the condition that the temperature does not exceed 940 DEG C, the damage of high temperature to the silicon wafer body is effectively avoided, the conversion efficiency of the solar cell is improved, and convenience is provided for subsequent production of the solar cell with a complex structure.

The utility model discloses a diffusion furnace gas supply assembly for a solar cell diffusion process, which belongs to the technical field of diffusion furnaces and comprises a main gas inlet pipe and a branch gas inlet pipe, the main gas inlet pipe and the branch gas inlet pipe are connected in parallel in the diffusion furnace, and the end parts of the main gas inlet pipe and the branch gas inlet pipe are respectively provided with a rotary gas outlet assembly; the rotary air outlet assembly comprises a connecting sleeve, a rotary sleeve and an air outlet cylinder, the connecting sleeve is rotationally connected to the end of the main air inlet pipe and the end of the branch air inlet pipe, a pneumatic driving assembly is installed in the rotary sleeve, air inlet airflow can drive the rotary sleeve to rotate through the pneumatic driving assembly, and multiple sets of air outlet holes are formed in the air outlet cylinder. According to the gas supply assembly of the diffusion furnace, the rotary gas outlet assembly capable of rotatably discharging gas is assembled at the end parts of the main gas inlet pipe and the branch gas inlet pipe, so that gas can be dynamically supplied to the inside of the diffusion furnace in multiple directions, the gas required by diffusion is uniformly supplied, the diffusion reaction is uniform, and the doping amount difference of battery pieces is effectively reduced.

Method for producing a coated electrode wire for use in electrical discharge machining, comprising: Providing a central wire having a first diameter and formed from a first copper-containing metal, Hot-dip coating of the central wire for a desired time and at a desired temperature through a melt bath containing a second metal having an evaporation temperature lower than that of the first metal, wherein an alloy layer is formed on the central wire by means of a diffusion reaction between the first metal and the second metal, which has greater hardness and lower elongation than the first metal and the second metal, and wherein a coating layer is formed on the alloy layer, and Drawing the central wire, which has the alloy layer and the coating layer, so that a coated electrode wire with a second diameter is formed, whereby cracks are formed during the drawing step due to the high hardness and low elongation in the alloy layer and in the coating layer, characterized in that the resulting alloy layer and the resulting coating layer are porous with a sponge-like structure.

The invention discloses a one-way circulation Raman device which comprises a mobile phase bottle, two six-way valves, a current carrying unit, an input end, a Raman detection pool, a waste liquid bottle and a Raman detection unit, and the Raman detection pool comprises a liquid or solid Raman enhanced substrate. The one-way circulating Raman device can form a flow path in various states, when the flow path is in a circulating detection state, a sample can circularly flow in a pipeline system along with continuously and circularly flowing carrier current and passes through a detection pool area for multiple times, so that the mixing or reaction process of the sample can be more quickly completed, and the detection efficiency is improved. The one-way cyclic Raman device is simple in structure, easy to operate, low in cost and convenient to popularize, signals generated by a sample in different time dimensions and diffusion / reaction processes can be obtained, multi-dimensional information can be obtained, detection universality and accuracy are improved by means of the information, and the one-way cyclic Raman device is simple in structure, easy to operate, low in cost and convenient to popularize.

The application provides a surface treatment method of a fuel cell bipolar plate, comprising the following steps: providing a bipolar plate to be treated, and placing the bipolar plate in a closed chamber; vacuumizing the chamber; filling the chamber with a diffusion gas, wherein the diffusion gas comprises nitrogen, and at least one of unsaturated organic gas and oxygen; heating the bipolar plate to a preset temperature of a gas diffusion reaction, and keeping the preset temperature for a preset time, so as to form a diffusion reaction layer extending inward from the surface of the bipolar plate in the bipolar plate. The application can effectively improve the corrosion resistance of the bipolar plate. The application also provides a bipolar plate treated by the above surface treatment method and a fuel cell comprising the bipolar plate.

This invention provides a nano-low-iridium high-entropy oxide, its preparation method, and its application, which have the following advantages: (1) Preparation method: A high diffusion reaction environment is constructed, and the formation of high-entropy metal oxides at low temperature is achieved through kinetic acceleration, avoiding high-temperature sintering and facilitating the generation of two-dimensional nanostructures; (2) Two-dimensional high-entropy structure: The two-dimensional nanostructure fully exposes the active sites, and the high configurational entropy improves the intrinsic activity and dispersion of iridium and ruthenium sites, reducing the amount of iridium used while maintaining high activity; the high-entropy effect and delayed diffusion effect inhibit element segregation and improve stability. (3) Catalytic application: The nano-low-iridium high-entropy oxide can achieve a dual improvement in activity and stability in processes such as oxygen evolution reaction, urea oxidation, and biomass oxidation.

The invention discloses a same metal welding method, and relates to the technical field of welding, and the same metal welding method comprises the following steps: selecting a welding flux, selecting a copper-tin welding flux based on a melting point and a welding area, forming an eutectic through copper and tin, and pretreating an oxygen-free copper workpiece to be welded, the method comprises the steps that abrasive paper one-way polishing, absolute ethyl alcohol ultrasonic cleaning and drying treatment are sequentially conducted, base metal is formed, the welding face of the base metal is evenly coated with copper-tin solder, brazing is conducted on the base metal, hydrogen and nitrogen generated through ammonia decomposition serve as a reducing atmosphere and a protective atmosphere respectively, and through cooperative regulation and control over temperature, pressure and time, the copper-tin solder is obtained. And performing diffusion reaction on tin in the copper-tin solder and the base material to form a copper-tin intermetallic compound bonding layer. The copper-tin solder is combined with brazing, base metal does not need to be melted, energy loss caused by high heat conduction of oxygen-free copper is prevented, effective combination can be achieved without multiple times of bottoming, the welding efficiency and the welding quality are improved, and the welding quality of the medium-thickness plate is excellent.

The invention discloses a polyamide thermo-oxidative aging performance prediction method, device and system and a storage medium. The polyamide thermo-oxidative aging performance prediction method comprises the following steps: acquiring polyamide thermo-oxidative aging experiment data and corresponding tensile strength retention rates under coupling conditions of different oxygen pressures, temperatures, sample thicknesses and the like; constructing a correction response prediction closed formula based on a diffusion-reaction synergistic mechanism, and introducing the correction response prediction closed formula into the model as a soft physical constraint; a multi-target joint training strategy is adopted, and meanwhile, a data fitting error and a physical equation residual error are minimized; and performing performance evaluation and visualization on the trained model, and solving and outputting model parameters. By adopting the technical scheme of the invention, the thermo-oxidative aging performance of polyamide is predicted under the multi-coupling condition based on the PINN driven by the reaction-diffusion synergistic closed formula.

The application provides an electrolyte and a battery comprising the electrolyte, wherein a first additive in the electrolyte is a pyridine silane compound, the pyridine silane compound can generate a stable interface film at a positive electrode, and the cycle performance of the battery is significantly improved. On the other hand, the silane group in the first additive can participate in film formation to generate a CEI film rich in inorganic components at a thermal shock temperature, and the thermal stability of the positive electrode interface can be improved; meanwhile, the pyridine ring is a weak base substance, can react with a Lewis acid at a high temperature, inhibit the diffusion reaction of combustion process free radicals, improve the flame retardancy, and the pyridine structure can be polymerized at a short circuit point at the thermal shock temperature, and the thermal shock performance of the battery is further improved.

The application discloses a zinc layer peeling control method based on galvanizing liquid alloy element proportioning, which firstly calculates diffusion and reaction parameters of alloy elements through a multi-component diffusion reaction coupling model based on CALPHAD, and constructs a diffusion reaction phase diagram; simulates atomic motion through a molecular dynamics-evolutionary neural network analysis algorithm, extracts key characteristic parameters, and establishes a mapping relationship between the key characteristic parameters and the bonding performance of a zinc layer; then collects real-time process parameters through a SIMATIC PCS 7 system of Siemens, integrates multidimensional data through a MES for Metals platform, analyzes parameter correlation and identifies a main influence range, and generates an alloy element proportioning adjustment scheme; finally, the scheme is converted into a control instruction through the SIMATIC PCS 7 system of Siemens, and dynamic regulation and control are realized. The method solves the problem of data disconnection, improves regulation and control accuracy and stability, reduces the probability of zinc layer peeling, and improves product quality consistency.

The invention provides a method for improving the doping concentration of a Topcon battery emitter metal contact area, which comprises the following steps of: cleaning and texturing a silicon wafer, performing diffusion reaction at high temperature and low pressure, and forming a first-stage silicon wafer with a three-layer structure based on a silicon substrate on the surface of the silicon wafer; performing deeper secondary high-temperature melting type doping reaction on the local area of the silicon wafer at normal temperature and normal pressure by using a laser beam emitted by a continuous laser which is started at high frequency to form a secondary silicon wafer which takes a silicon substrate as a basic part and is of a two-layer structure, most of which is of a three-layer structure; removing B2O3 on the surface layer after weak acid or weak base cleaning to form a third-stage silicon wafer, and oxidizing the third-stage silicon wafer to obtain a fourth-stage silicon wafer with an antireflection layer; and then silk-screen printing metal electrodes on the first surface and the second surface of the fourth-stage silicon wafer to form the Topcon battery with high photoelectric conversion efficiency.

The application relates to the material field, in particular to a FeCoCr film, a preparation method and application thereof, the FeCoCr film comprises a multilayer structure, the multilayer structure comprises a substrate layer and a FeCoCr layer, and a Pt layer arranged between the substrate layer and the FeCoCr layer; after the Pt layer is introduced, a diffusion reaction occurs between the Pt layer and the FeCoCr layer, thereby generating an L10-FePt phase in the film, forming a new hard magnetic phase, and the coercivity of the FeCoCr film is greatly improved; meanwhile, the Pt element effectively promotes the alpha phase amplitude decomposition in the FeCoCr film into a strong magnetic phase and a Cr-rich non-magnetic phase, the Cr-rich non-magnetic phase plays a role of pinning magnetic domains in the film, and the coercivity of the material is further greatly improved; through the synergistic effect of the two mechanisms, the coercivity of the FeCoCr film is greatly improved, therefore, code disc material prepared by using the FeCoCr film has higher performance, and the code disc signal has higher stability and anti-interference ability after being written.