53results about How to "Improve diffusivity" patented technology

The present invention belongs to the technical field of positive electrode active materials, and specifically relates to a nano single crystal lithium iron phosphate and its preparation method and application. The preparation method comprises the following steps: after ball milling a mixture containing a lithium source, an iron source and a phosphorus source in a supercritical fluid, roasting, removing impurities and drying to obtain lithium iron phosphate; after dispersing the lithium iron phosphate in propylene glycol and sintering, a nano single crystal lithium iron phosphate is obtained. The preparation method of the nano single crystal lithium iron phosphate of the present invention combines supercritical fluid technology with secondary sintering, so that the carbon coating on the surface of the lithium iron phosphate is uniform and the grain size of the lithium iron phosphate is refined, thereby improving the electron transmission rate and cycle stability of the lithium iron phosphate.

The invention discloses a fly ash zeolite-based sustained-release material as well as a preparation method and application thereof. The material is a compound with an FAU / Zeoliite faujasite nanocrystal structure. According to the method, high-value resource utilization can be carried out on the fly ash remaining after combustion of a coal boiler, and in the synthesis process, various trace beneficial mineral nutrient substances of the fly ash are automatically loaded in the space of the honeycomb-shaped micro-mesoporous cage frame channel, so that required energy and mineral requirements can be provided for soil microorganisms and soil animals; the slow-release effect can be achieved, and macroelement nutrient chemicals can be completely replaced. The slow-release medium containing the material provided by the invention is a composition carrying trace mineral nutrients required by plants and macro nutrients lacked in a soil environment; the fertilizer can be widely applied to soil fertilizers, promotion of ecological balance of soil microorganisms and soil animals, promotion of degradation or inactivation of toxic substances in soil, soil pH improvement, plant fertilizers, promotion of plant growth, plant irrigation and the like, and has good effects.

The utility model discloses a packaging structure capable of improving substrate wiring space and reducing packaging size. The packaging structure comprises a substrate and a plurality of chip dies, the die is flatly laid on the top surface of the substrate and is connected with a contact finger on the substrate; and in the die, the power input end and the grounding input end of the main chip are connected with a power contact PWR finger and a ground contact GND finger on the top surface of the substrate. The front surface of the dummy die is a metal conductive layer, and the back surface of the dummy die is a non-metal insulating layer; the dummy die is divided into a PWR die and a GND die; the back surfaces of the PWR die and the GND die face downwards; the power input end and the grounding input end of the main chip are respectively connected with the front surfaces of the PWR die and the GND die; the PWR finger and the GND finger are respectively connected with the front surfaces of the PWR die and the GND die; a power supply and a grounding output end of the main chip are respectively connected with a power supply and a grounding input end of the auxiliary chip.

The application discloses a SiC reactor for cyclohexanone aminooxidation and a design method thereof, and relates to the technical field of chemical reactors. The SiC reactor comprises a reactor shell, a plurality of reaction channels, a plurality of composite plates, and a plurality of reaction channels. The axis direction of the reaction channel is parallel to the axis direction of the reactor shell. The plurality of composite plates are arranged in the plurality of reaction channels. The flat plate and the corrugated plate made of silicon carbide are arranged in the axial direction of the reaction channel and matched with the rhombic through-hole structure. The fluid in the reaction channel can be disturbed, the radial diffusion effect of the fluid is improved, and the effective residence time of the fluid is prolonged. Based on the excellent heat conduction performance of silicon carbide and the plate combination structure, the heat exchange between the wall surface and the fluid is strengthened, the temperature field distribution in the channel is optimized, the mass transfer and heat transfer conditions of the material are improved, and the generation effect of cyclohexanone oxime is improved.

The application discloses an integrated stretchable flexible wearable biosensor and a preparation method thereof, and belongs to the technical field of electrochemical sensing.The integrated stretchable flexible wearable biosensor is wrapped by a PAN / SiO2 sweat absorption layer.The method comprises the following steps: preparing a stretchable conductive composite fiber; preparing an integrated stretchable flexible sensing fiber; preparing a PAN / SiO2 sweat absorption layer; and preparing a sensor.The conductive composite fiber in the application can maintain stable performance under multiple bending and twisting, the sensor is integrated with a flexible integrated circuit chip and a flexible power supply device to obtain a fabric sensing system, the fabric sensing system can process acquired sensor data, and the detection data can be uploaded to a mobile terminal and a cloud end in real time through Bluetooth technology, real-time monitoring and management of a health condition of the biosensor are realized, six specific biomarkers can be efficiently detected by using only 1 muL of sweat, the amount of sweat required for activating the biosensor is 1 / 3 of that of the prior art, and the fabric sensing system can easily adapt to a tensile strain caused by exercise.

A plurality of grating strips are fixed on a plurality of keels in a nailing mode and arranged at intervals in the width direction of a mounting frame, the cross section of each grating strip is integrally arranged in a trapezoid shape, the vertex angle of the cross section of each grating strip ranges from 90.5 degrees to 95 degrees, and the two ends, in the width direction, of each grating strip are inwards folded at the position of the bottom edge to form bottom slits; according to the grating sound absorption assembly provided by the utility model, the plurality of grating strips are nailed and fixed on the plurality of keels and are arranged at intervals in the width direction of the mounting frame, so that the fixing effect of the grating strips is excellent, the possibility of vibration is reduced, the cross sections of the grating strips are integrally arranged in a trapezoidal shape, and the trapezoidal surfaces of the grating strips can form an excellent diffusion effect; the sound absorption effect is assisted; the cross sections of the grid strips are trapezoidal, so that the fixing stability of the grid strips is improved; after sound waves are transmitted in from the gaps between the grating bars and reach the bottom slits, a resistant silencing effect is formed, and the effect of absorbing low-frequency noise is facilitated.

The present invention relates to thel field of lithium ion batteries. Disclosed are a surface-coated positive electrode material and a preparation method therefor, and a lithium ion battery. The positive electrode material comprises a base body and a coating layer covering the surface of the base body; the characteristic peaks of the coating layer at a position where 2θ is 31°-35° according to an XRD test are in a bimodal distribution; and the ratio Ib / Ia of the peak intensity Ib of the secondary peak to the peak intensity Ia of the main peak in the bimodal distribution is 0.8-1. The surfce-coated positive electrode material has high ion and electron conduction capability, and can accelerate the diffusion rate of ions and electrons in the positive electrode material, thereby significantly improving the rate capability of the lithium ion battery comprising the positive electrode material. Meanwhile, the surface-coated positive electrode material having the specific coating layer can avoid catalytic corrosion between the positive electrode material and an electrolyte, thereby improving the cycling stability of the lithium ion battery comprising the positive electrode material. In addition, the thermal stability of the surface-coated positive electrode material having the specific coating layer is significantly improved.

The present invention discloses a multifunctional spraying device, which mainly comprises a first spraying mechanism and a second spraying mechanism arranged on a device body, wherein the first spraying mechanism performs mixed-pressure atomization through high pressure, and is mainly used for atomizing and spraying a working fluid (such as a disinfectant, a nutrient solution or a pesticide, etc.) to obtain small-molecule dry mist, which can ensure the stable performance of the working fluid, while the second spraying mechanism performs temperature-raising atomization by heating and pressurizing, and is mainly used for atomizing and spraying a synergist (for diffusion and suspension), and obtains particle diffusion smoke with good diffusion effect and long-lasting suspension. At the same time, since the second nozzle is arranged below the first nozzle, by utilizing the suspension ability and diffusion ability of the diffusion smoke, the dry mist and the diffusion smoke can be fully combined to efficiently perform three-dimensional disinfection operations, pesticide spraying operations or crop fertilization.

The invention discloses a method for improving the stability of sulfide electrolyte to lithium on a large scale, belongs to the field of solid electrolyte materials of lithium metal batteries, and particularly relates to preparation of electrolyte materials, preparation of conductive agents, preparation of composite positive pole pieces and preparation of all-solid-state lithium metal batteries. According to the invention, the sulfide electrolyte is soaked in the liquid inorganic metal halide and then is mechanically compounded with the sulfide electrolyte to prepare the composite sulfide electrolyte with high ionic conductivity and high density, and the electrolyte can effectively reduce lithium deposition overpotential and inhibit lithium from puncturing a solid electrolyte layer; glycosyl carbide prepared from inositol hexaphosphate, 2-hydroxymethyl imidazole, polyaniline and glucose is used as a conductive agent, so that the conductivity and critical current density of the composite positive pole piece are remarkably improved; and the prepared all-solid-state lithium metal battery is stable in circulation and excellent in rate capability and safety, so that the all-solid-state lithium metal battery has great application potential in the fields of vehicle preparation and the like.

This invention discloses a USY molecular sieve, its preparation, and its application. The USY molecular sieve has the following properties: mesoporous pore volume accounts for 30%–60% of the total pore volume; the total acid content is 400–480 μmol / g at 200℃ and 120–150 μmol / g at 350℃. When the molecular sieve of this invention is used as a hydrocracking catalyst, both the catalyst activity and selectivity are significantly improved.

The invention relates to the technical field of aqueous zinc ion batteries, and discloses a high-utilization-rate and high-stability zinc electrode as well as a preparation method and application thereof. The zinc electrode comprises a base body and a functional coating attached to the surface of the base body, and the functional coating is formed by coating the surface of the base body with slurry formed by zinc powder, an adhesive and a functional additive and drying the slurry. According to the obtained zinc electrode, the zinc ion diffusivity under the high DOD condition can be remarkably improved, the free water induced parasitic side reaction and the stress cracking problem caused by the volume effect are inhibited, the long circulation stability under the high zinc metal utilization rate (15-96%) condition is prolonged, and the good application prospect is shown in a low N / P zinc-based device.

The invention discloses a negative pole piece, a battery monomer, a battery and a power utilization device, the negative pole piece comprises a main body area, a thinning area arranged on one side of the main body area and a tab arranged on one side of the thinning area, the compaction value of the thinning area is smaller than that of the main body area, and the thickness of the tab is smaller than that of the main body area. The compaction value of the thinning area close to the tab is reduced corresponding to the main body area, so that the purpose of influencing the transmission resistance of lithium ions in the negative pole piece is achieved, the high temperature rise near the tab of the negative pole piece is improved, and the problems of side reaction increase, negative pole local internal resistance increase, local lithium precipitation and capacity diving caused by the high temperature rise are further avoided.

The invention provides a micron-sized rare earth cerium additive modified 1000MPa-grade high-strength steel submerged-arc welding flux as well as a preparation method and application thereof, and belongs to the technical field of flux preparation. The invention solves the problems of low low-temperature toughness, high crack generation tendency, burning loss of alloy elements and the like of the existing 1000MPa-grade high-strength steel submerged-arc welding deposited metal. The rare earth cerium additive is introduced into the welding flux, the additive can improve the fluidity of the welding flux so as to improve the welding quality, meanwhile, micron-sized rare earth cerium has the effects of refining grains and modifying inclusions, and the micron-sized rare earth cerium is matched with other components in the welding flux so that the strength of deposited metal can be enhanced, and the low-temperature impact toughness of the deposited metal can be improved. The flux can be used for welding 1000MPa-grade high-strength steel under the working conditions that the online energy is greater than 30kJ / cm and the thickness of a base metal plate is greater than 80mm, the mechanical property of deposited metal after welding is excellent, the construction cost of the high-strength steel for water-power engineering can be reduced, and the flux has remarkable economic benefits and social benefits.

The invention relates to the field of refining and application of wood fiber biomass, and discloses a lignin-based formaldehyde-free adhesive, a lignin-based plywood and a preparation method and application of the lignin-based formaldehyde-free adhesive and the lignin-based plywood. The lignin-based formaldehyde-free adhesive disclosed by the invention comprises the following components: L-cysteine lignin, and the solid content of the lignin-based formaldehyde-free adhesive is 10-45wt%. The method comprises the following steps: mixing an aqueous solution of L-cysteine hydrochloride and lactic acid with raw materials for pretreatment; performing extraction and vacuum filtration on the obtained suspension to obtain dissolved lignin and hemicellulose filtrate, and performing extraction and purification on the filtrate to obtain L-cysteine lignin; the lignin-based formaldehyde-free adhesive is prepared by uniformly dispersing the L-cysteine lignin in water. According to the invention, the used solvent is green and nontoxic in source, the hydrated lignin-based adhesive with good fluidity is prepared with low solid content, and the prepared plywood shows excellent dry and wet bonding strength, solvent resistance and weather resistance, and meets the preparation requirements of national I-class plywood.

The utility model discloses a kind of deformation-preventing absorbent core and sanitary towel with it, wherein deformation-preventing absorbent core includes surface layer, water-repellent layer, diffusion layer and bottom layer, surface layer, water-repellent layer, diffusion layer and bottom layer are sequentially arranged and bonded from top to bottom, water-repellent layer is equipped with multiple through holes, through hole is penetrated in the upper and lower surfaces of water-repellent layer, diffusion layer is foamed material article.The utility model utilizes water-repellent layer and diffusion layer to multiple diffusion to liquid, can solve the problem of liquid accumulation, to reach the effect of preventing deformation.

The invention discloses a graphite composite material as well as a preparation method and application thereof. The material comprises graphite and a composite porous carbon layer coating the graphite, the composite porous carbon layer contains hard carbon and graphitized carbon, the graphite composite material is prepared from the raw materials of the composite porous carbon layer, the graphite and an oxygen-containing pore-forming agent, the raw materials of the composite porous carbon layer comprise a hard carbon precursor and a graphitized carbon precursor, and the oxygen-containing pore-forming agent is prepared from the hard carbon precursor and the graphitized carbon precursor. The mass ratio of the graphite to the total mass of the raw materials of the composite porous carbon layer is less than 28: 1, and the mass ratio of the graphitized carbon precursor to the hard carbon precursor is more than 1: 1; the ratio of the total mass of the raw materials of the composite porous carbon layer to the mass of the oxygen-containing pore-forming agent is more than 10: 1. When the graphite composite material disclosed by the invention is prepared into a negative electrode material of a secondary battery, the graphite composite material has excellent quick charging performance and good cycling stability, and a new possibility is developed for high-performance battery application in multiple fields of electric automobiles, portable electronic equipment, energy storage systems and the like.

The invention provides an air conditioner. The air conditioner comprises an air conditioner body; the air deflector is arranged on the air conditioner body; the aromatherapy assembly is fixed to the air guide plate and comprises an aromatherapy shell, an aromatherapy piece is arranged in the aromatherapy shell, and at least one aromatherapy opening is formed in the aromatherapy shell; the aromatherapy end cover is arranged on the aromatherapy shell in a covering manner; one end of the adjusting assembly is connected with the air conditioner body, the other end of the adjusting assembly is connected with the aromatherapy end cover, by means of the air conditioner, the aromatherapy assembly can be started along with the air conditioner when the air conditioner is started, and aromatherapy is promoted to diffuse out of the air conditioner through air supply of the air conditioner, so that a better diffusion effect of the aromatherapy is achieved.

The invention discloses a high-strength high-hardness high-entropy alloy with an amplitude-modulated decomposition structure and a preparation method of the high-strength high-hardness high-entropy alloy. The high-entropy alloy comprises, by atomic percent, 20%-26% of Al, 30%-34% of Cr, 30%-34% of Co and 16%-22% of Ni, and the crystal structure of the high-entropy alloy is a single centered cubic phase (BCC). According to the method, the solubility intervals among Al, Cr, Co and Ni elements are utilized, alloy components are located in an inflection point curve of a free energy-component curve by optimizing respective proportions, and the Ni and Al elements can be promoted to generate uphill diffusion through simple vacuum arc melting, so that the BCC phase high-entropy alloy with large amplitude-modulated decomposition structure dispersity and uniform distribution is formed. Benefited from the remarkable strengthening effect of an amplitude-modulated decomposition structure, the high-entropy alloy shows typical characteristics of high strength and high hardness and excellent cavitation erosion-corrosion resistance, and is a high-entropy alloy material with optimal cavitation erosion resistance and cavitation erosion-corrosion resistance which are publically reported at present; excellent application prospects are shown in the fields of hydraulic machinery, maritime work flow passage components and the like.

The present application relates to the field of cathode material, and a cathode material and a method for preparing the same, lithium ion battery provided. The cathode material includes secondary particle which includes a plurality of primary particles, where the primary particle includes an active material having a chemical formula LibNixCoyMzRwO2, where 0.95≤b≤1.10, 0.8≤x<1, 0<y+z+w≤0.2, x+y+z+w=1, 0.0001≤w≤0.003; M is selected from at least one of Mn and Al, R is a metal; Phosphate compound coating layer are uniformly distributed on the surface of the cathode material, including a first coating layer and a second coating layer, where the first coating layer forms on the surface of the primary particle, the second coating layer forms on the surface of the secondary particle, and the first coating layer and the second coating layer both include phosphate compound. The single point phosphorus content at various locations on the surface of the cathode material have little difference with the average phosphorus content on the surface of the cathode material. The cathode material of this application can effectively improve the rate performance, thermal and cycling stability of lithium battery, and has the characteristics of low cost and easy large-scale production.

The utility model relates to a reaction kettle stirring device and a reaction kettle, and belongs to the field of mechanical stirring devices, the reaction kettle stirring device comprises a driving device, a transmission device and stirring blades, and the stirring blades at least comprise a first blade and a second blade; the reversing stabilizing mechanism comprises a bracket, a fixed bevel gear and a rotating bevel gear; the transmission device comprises a first transmission shaft and a second transmission shaft which are vertically arranged, and the first transmission shaft and the second transmission shaft are coaxially connected through a reversing stabilizing mechanism; the two fixed bevel gears are vertically and oppositely arranged, and the two rotating bevel gears are transversely and oppositely arranged; the first paddle is fixedly connected to the first transmission shaft, and the second paddle is fixedly connected to the second transmission shaft; the fixed bevel gear and the rotating bevel gear are in meshing transmission to drive the first transmission shaft and the second transmission shaft to rotate oppositely and reversely so as to drive the first paddle and the second paddle to rotate oppositely and reversely. Reverse rotation of the blades is achieved, and reverse thrust torque generated in the rotation process can be counteracted to reduce the influence on the driving device.

The present application relates to the technical field of industrial water treatment, and in particular to a branched polycarboxylate, a high-temperature-resistant low-phosphorus scale-inhibiting dispersant for grey water and a preparation method thereof.The high-temperature-resistant low-phosphorus scale-inhibiting dispersant for grey water comprises the following raw materials in parts by weight: 6-10 parts of disodium ethylenediaminetetraacetate, 18-22 parts of hydrolyzed polymaleic anhydride, 0.3-0.8 parts of sodium hexametaphosphate, 15-20 parts of sodium polyacrylate, 1.5-2.5 parts of aminotrimethylene phosphonic acid mother liquor, 30-38 parts of branched polycarboxylate and 15-20 parts of deionized water.The obtained scale-inhibiting dispersant can effectively inhibit carbonate scale and sulfate scale, and has good high-temperature stability.

The invention provides a method for regenerating and upgrading a retired ternary lithium ion battery, which comprises the following steps of: preparing a waste NCM622 soft package battery into waste positive electrode powder S-NCM, mixing the waste positive electrode powder S-NCM with ternary eutectic molten salt, ball-milling, calcining, filtering, washing and drying to obtain a positive electrode material U-NCM; according to the method, the NCM622 waste positive electrode material is regenerated and upgraded into the NCM811 positive electrode material, the method has great advantages in the aspect of improving the reutilization of metal elements in the waste lithium ion battery to the maximum extent, the waste ternary nickel-poor lithium ion battery material is directly converted into the new high-nickel positive electrode material, and the method is more environment-friendly and economical.

The invention discloses a lithium ion battery positive electrode layered oxide with an edge-surface shared layered structure and a preparation method and application thereof, and belongs to the technical field of lithium ion battery positive electrode materials. The preparation method comprises the following steps: synthesizing a layered oxide precursor containing sodium or potassium through high-temperature calcination, immersing the layered oxide precursor containing sodium or potassium into a solution containing lithium salt, and adding a nano layered oxide ion exchange auxiliary agent for liquid-phase ion exchange. In the ion exchange process, the nano layered oxide is adsorbed on the surface of the precursor, so that the reaction activation energy is reduced, and the uniformity and consistency of the exchange process are improved. And filtering, washing and drying to finally obtain the prismatic surface shared layered structure. The method comprises the steps of high-temperature calcination and ion exchange, and specifically provides raw materials and operation conditions. The prepared material has a laminated structure shared by prism surfaces of the lithium oxide octahedron and the cobalt oxide octahedron, is uniform in particles, controllable in particle size, high in material capacity and excellent in cycle performance, and can be widely applied to the electronic product and power automobile market.

The utility model relates to a double-stage electrostatic oil fume treatment unit with fresh air heating and oil stain self-cleaning functions, belonging to the field of high-voltage electrostatic purification of oil fume and the field of fresh air heating. The utility model is to solve the problems of low removal efficiency of oil fume particles caused by the phenomenon of "counter electric field" when high-voltage electrostatic technology purifies oil fume, poor cleaning effect of conventional cleaning measures, high corona voltage, easy air breakdown to form sparks, high risk of fire, and high energy consumption of heating fresh air in winter. The utility model includes an oil fume collecting device, a charging mixing section, a first-stage oil fume treatment section, a second-stage oil fume treatment section, oil fume pipeline components, and fresh air pipeline components. The oil fume collecting device is installed at the inlet end of the oil fume pipeline components. The charging mixing section, the first-stage oil fume treatment section, and the second-stage oil fume treatment section are connected in series in the oil fume pipeline components in the order of the oil fume flow direction. The fresh air pipeline components are installed on the first-stage oil fume treatment section and the second-stage oil fume treatment section. The utility model is used as a device for treating indoor oil fume and preheating indoor fresh air.

The utility model belongs to the technical field of photovoltaic cells, and particularly relates to a heat exchange device based on high-temperature diffusion waste gas and a diffusion system. The heat exchange device based on the high-temperature diffused waste gas comprises a device body, a heat exchanger, a heat exchanger and a heat exchanger, and the device body is provided with a high-temperature waste gas inlet and a high-temperature waste gas outlet and forms a cavity for containing the high-temperature waste gas; the process gas pipeline is positioned in the cavity, the process gas pipeline is provided with a process gas inlet, a process gas outlet and a bending section positioned between the process gas inlet and the process gas outlet, and the bending section is bent to form a space for accommodating process gas; and the heating device is positioned in the cavity. Therefore, the process gas can be heated, and the high-temperature diffusion waste gas can be recycled; high-temperature diffusion waste gas can be effectively prevented from being condensed into solids to be attached into the heat exchange device due to supercooling, and the heat exchange effect of the heat exchange device is better; and the effective heat exchange area of high-temperature diffusion waste gas and process gas can be increased, so that the heat exchange device has a compact structure.

The invention discloses a dynamic spiral and bidirectional diffusion image encryption method based on four-dimensional chaos, and relates to the technical field of information security. Comprising the following steps: generating a high-entropy key stream related to a plaintext image based on SHA-512 Hash and a four-dimensional chaotic system; dynamically controlling the direction, the starting point and the step length of spiral traversal by using the key stream, and carrying out layered spiral scrambling on image pixels so as to damage spatial correlation; and performing forward and backward bidirectional diffusion on the scrambled image by using two independent chaotic key sequences in combination with a nonlinear feedback mechanism so as to realize confusion and diffusion of global pixel values. Through the synergistic effect of the chaotic system, the dynamic scrambling and the bidirectional diffusion, the problems that the randomness of a low-dimensional chaotic system is insufficient and the residual correlation of static scrambling and the avalanche effect of unidirectional diffusion are weak are solved, and the security, the randomness and the anti-attack capability of image encryption are remarkably improved.

The invention belongs to the technical field of organic photoelectric materials, and particularly relates to an azaanthracene organic polymer as well as a preparation method and application thereof. The structural general formula of the azaanthracene organic polymer is as shown in # imgabs0 #, X is selected from one of O, S, N and O = S = O, i is an integer between 1 and 40, and n is an integer between 2 and 1000. The azaanthracene phosphate micromolecules are polymerized, so that the molecular weight of the azaanthracene phosphate micromolecules is increased, and the azaanthracene phosphate micromolecules have better stability, excellent film-forming property and interaction among macromolecular chains. And the value ranges of i and n ensure that the azaanthracene organic polymer has better solubility, can be dissolved in various single or mixed solvents, and has good solution processability. When the compound is applied to a photoelectric device as a hole transport material, the hole selectivity is remarkably improved, the interface impedance is reduced, non-radiative recombination is effectively inhibited, and the stability of the device is further improved.

The invention relates to the technical field of metal welding, and discloses a high-strength tool alloy steel and ceramic composite layer welding process which comprises the following steps: quenching and tempering a substrate, processing a swallow-tail-shaped nano microstructure on a to-be-welded surface of the substrate through femtosecond laser, and then depositing a Ti layer with the thickness of 1 micron through magnetron sputtering, and carrying out heat preservation at 740-760 DEG C in a vacuum furnace for 1 hour for annealing. The contact area of a base body and the brazing filler metal is increased through the dovetail-shaped nanometer microstructure machined through femtosecond laser, a mechanical interlocking foundation is formed, the wettability and the diffusivity of an interface can be improved in cooperation with magnetron sputtering of the Ti layer and subsequent annealing treatment, and then the performance gradient transition of the four layers of gradient brazing filler metal films is achieved. In combination with Ar-H2 mixed plasma bombardment and ceramic layer precise polishing and cleaning, metallurgical reaction conditions of a brazing interface can be optimized, and meanwhile, heat input in the welding process can be controlled through synchronous scanning of the optical fiber laser and the plasma arc and a dynamic temperature feedback regulation and control mechanism.

A method and a reaction system for converting waste plastics into chemical raw materials belong to the field of petroleum chemical industry, comprising: after being crushed, the waste plastics are mixed with part of the circulating liquid hydrocarbon in the product, extruded into a microwave device through a feeder for pretreatment; entering a moving bed reaction-regeneration device, and contacting with a spherical catalyst with a low silicon aluminum ratio and containing phosphorus ZSM-5 zeolite on a silicon aluminum active carrier with a particle size of 1-5 mm, and performing thermal cracking-catalytic cracking reaction at 400-540 DEG C; the product enters a later process to separate ethylene, propylene, butene, aromatic hydrocarbon production raw materials and liquid hydrocarbon for circulation; the deactivated catalyst enters a regenerator for coking and then is recycled; the application improves the reaction rate and conversion efficiency of the waste plastic conversion process, the stability of material conveying and operation, produces high value-added products while eliminating white pollution, reduces oil and gas resource consumption and realizes carbon emission reduction, and has good economic and environmental benefits.

The invention provides a BCDMH (bromochlorohydantoin) treatment agent for black and odorous water treatment, and relates to the technical field of water ecological environmental protection, BCDMH is prepared into a granular preparation, the specific gravity of particles is larger than that of water, the BCDMH is prepared into the granular preparation, and the granular preparation is uniformly thrown into the black and odorous water. After entering water, the bromochlorohydantoin granular preparation is quickly dispersed to form wettable powder, the bottom is aerated at the same time, oxidation of bromochlorohydantoin is promoted, and generated hypobromous acid and hypochlorous acid are used for killing sludge microorganisms; the bromochlorohydantoin treatment agent has extremely high pollution removal capacity, black and odorous bottom mud is converted into brown yellow after treatment, and the method is an in-situ and in-situ treatment method and is suitable for treatment of rural black and odorous water bodies. According to the present invention, the raw materials are respectively crushed, such that the adsorption capacity of the crushed bentonite and the crushed attapulgite is significantly improved according to the solid adsorption theory, and the specific surface area of the bromochlorohydantoin powder and the 5, 5-dimethylhydantoin is increased so as to improve the sterilization and disinfection effect.