1473results about How to "Uniform thickness" patented technology

The invention relates to the technical field of powder metallurgy forming, and discloses a compressor valve plate forming device for powder metallurgy and a forming method thereof.The forming device comprises a lower die body, a guide support is fixed to the lower die body, an upper die body is slidably connected to the guide support, and a servo hydraulic cylinder is fixed to the top of the guide support; a servo hydraulic cylinder is arranged on the lower die body, the telescopic end of the servo hydraulic cylinder is fixedly connected with the upper die body, a forming groove is formed in the lower die body, a forming head is arranged on the upper die body, a feeding box is arranged on the lower die body, and a push rod assembly used for adjusting the working position of the feeding box is fixed to one end of the lower die body. The metal powder can be uniformly distributed in the forming groove, so that the thickness of a formed workpiece is uniform, a lubricant can be conveniently and quantitatively sprayed into the metal powder, the flowing property of the metal powder is improved, and the machining quality of the workpiece is improved.

The invention discloses a cylindrical gel cutting device capable of realizing continuous discharging, which comprises a feeding mechanism, a rotary cutting mechanism, a first buffer pool and a strip roller, and a cleaning solution is stored in the first buffer pool; the material carrying roller is located above the rotary cutting mechanism, and when the cylindrical gel is cut, the material carrying roller makes contact with the cylindrical gel and is used for driving the cylindrical gel to rotate. The feeding mechanism comprises an annular feeding chain and a transmission assembly, the annular feeding chain is connected with the rotary cutting mechanism through the transmission assembly, and power of the rotary cutting mechanism is transmitted to the annular feeding chain so as to drive the annular feeding chain to move towards a rotary cutter of the rotary cutting mechanism. According to the device, power of the rotary cutting mechanism is transmitted to the annular feeding chain through the transmission assembly, gel is driven to be fed, automatic feeding of the gel is achieved, meanwhile, the gel is made to rotate under the friction action of the strip roller, it is guaranteed that the thickness of slices is uniform, automatic continuous slicing of the cylindrical gel is achieved, and the production efficiency is improved. And the problem that the slicing quality is reduced due to the change of the position of the cutter is avoided.

The invention discloses a low-temperature sintering asymmetric porous silicon carbide ceramic membrane separation layer and a preparation method thereof, the preparation method comprises the following steps: a) preparation of a coating liquid: firstly dispersing a binder in a solution, adding silicon carbide particle powder, carrying out magnetic stirring dispersion for a period of time, then adding a dispersant, and stirring; then putting the stirred and mixed film coating liquid and the grinding balls into a ball milling tank for ball milling; and adjusting the pH value of the ball-milled silicon carbide coating liquid with ammonia water, and carrying out vacuum defoaming to finally obtain the high-stability and uniformly-dispersed silicon carbide coating liquid. Wherein the addition amount of the silicon carbide coarse particles is 0.5-50 wt% of the mass of silicon carbide; b) coating; c) drying; and d) sintering. The asymmetric porous silicon carbide ceramic membrane prepared by the method is low in sintering temperature, and the prepared separation layer membrane is controllable in pore size and uniform in pore size distribution; the method has excellent application prospects in the field of membrane separation.

The invention belongs to the field of rotary body component forming, and particularly relates to a close-up spinning device and forming method.The close-up spinning device comprises a rotating table, a clamping assembly fixedly arranged on the rotating table and at least one spinning assembly, and the spinning assemblies can control the thickness and surface quality of a cylindrical workpiece; the thickness of a product is convenient to control, the thickness of the product can more easily meet the design requirement, and a thin-wall rotary body component with the uniform thickness and a thin-wall rotary body component with the gradually-changed thickness can be produced; according to the forming method, the cylindrical workpiece with the radius-thickness ratio larger than 200: 1 can be subjected to closing-in spinning, the closing-in spinning process is divided into three stages, different closing-in track routes and differentiated machining technologies need to be selected in different closing-in stages, the shape precision and surface quality of closing-in spinning are guaranteed, and the machining efficiency is improved. The box bottom forming efficiency can be effectively improved through integral spinning forming.

The invention discloses an environment-friendly waterproof paint spraying device and method, and relates to the technical field of environment-friendly spraying, the environment-friendly waterproof paint spraying device comprises a bottom plate and further comprises a material uniformizing device, a liquid storage barrel is fixedly mounted at the top of the bottom plate, a feeding pipe is fixedly mounted at the top of the liquid storage barrel, and a discharging pipe is fixedly mounted on the circumferential surface of the liquid storage barrel; a high-pressure pump is fixedly installed on the left side of the discharging pipe, a hose is arranged on the right side of the high-pressure pump, a high-pressure spray head is arranged at the end, away from the bottom plate, of the hose, and the material uniformizing device comprises a servo motor, a stirring rod, a hollow rod, a driving rod, a stabilizing block, an arc-shaped plate and an extrusion block; the coating in the liquid storage barrel can be effectively turned over through the reciprocating movement of the cambered surface plate, and the coating is prevented from being precipitated or layered in the storage process, so that the quality of a sprayed coating is improved, and the phenomenon of bubbles or uneven spraying is reduced.

The invention provides a perovskite-crystalline silicon laminated cell, which comprises a heterogeneous crystalline silicon cell, a tunnel junction, a conductive layer, a first carrier transport layer, a perovskite light absorption layer, a second carrier transport layer and a transparent electrode layer which are sequentially laminated, wherein the first carrier transport layer comprises a dendritic structure facing and extending into the perovskite light absorption layer, and the length of the dendritic structure is smaller than the thickness of the perovskite light absorption layer. According to the perovskite-crystalline silicon laminated cell provided by the invention, through the arrangement of the dendritic structure with a relatively good capillary effect in the first carrier transport layer, a high-quality perovskite absorption layer can be formed, so that the energy conversion efficiency of the perovskite-crystalline silicon laminated solar cell is greatly improved.

The utility model relates to a cigarette material conveying system and a tobacco production system, and the cigarette material conveying system comprises a conveying component (1); the first-stage height detection component (2) and the second-stage height detection component (5) are arranged above the conveying component (1) and used for detecting the height of the materials, and the second-stage height detection component (5) and the first-stage height detection component (2) are arranged in a spaced mode in the conveying direction (X) and located on the downstream of the first-stage height detection component (2); the first-stage thinning assembly (4) is located between the first-stage height detection component (2) and the second-stage height detection component (5) in the conveying direction (X) and used for thinning the materials which are detected by the first-stage height detection component (2) and exceed the first preset height; and the second-stage thinning assembly (6) is positioned at the downstream of the second-stage height detection component (5) along the conveying direction (X) and is used for thinning the material which is detected by the second-stage height detection component (5) and exceeds the second preset height.

The invention belongs to the technical field of electrochemistry, and particularly relates to a gas diffusion electrode for efficiently producing hydrogen peroxide in situ and a preparation method thereof. The gas diffusion electrode is composed of a carbon paper substrate, a carbon black gas diffusion layer and a carbon nitride modified carbon nanotube catalyst layer. The preparation method of the gas diffusion cathode comprises the following steps: mixing a carbon nanotube, g-C3N4, isopropanol, 60wt% of PTFE emulsion and water to prepare a mixed solution, and loading a compound of the carbon nanotube and g-C3N4 on one side of a carbon paper substrate by adopting an ultrasonic impregnation mode to prepare a catalyst layer; the other side of the carbon paper substrate is impregnated with carbon black and PTFE emulsion to prepare a diffusion layer, and the diffusion layer is uniformly coated, dried and annealed to prepare the gas diffusion cathode. The gas diffusion electrode is used for efficiently producing hydrogen peroxide through in-situ electrocatalysis, the yield of hydrogen peroxide can reach 1050 mg / L after 1.5 h, the current efficiency is 76%, and the energy consumption is 5.56 KWh / Kg.

The invention discloses a PCBN (Polycrystalline Cubic Boron Nitride) composite sheet and a sintering process thereof. The sintering process of the PCBN composite sheet comprises the steps of material mixing, hot prepressing sintering, hot prepressing cooling, cubic pressure sintering and cooling to the room temperature, and raw materials in the mixed material comprise, by mass, 30%-85% of CBN micro powder and 15%-70% of binding agent micro powder. The PCBN composite sheet prepared by the sintering process is high in surface flatness and has relatively high hardness and cutting output.

The invention relates to the field of vacuum coating, in particular to a crystal hot-fix rhinestone vacuum coating device and a crystal hot-fix rhinestone vacuum coating process. The invention aims to solve the technical problem that the coating quality is reduced in the next coating process due to the fact that original coating materials are easy to accumulate and remain on the surface and in the heating container in the long-term high-temperature state and coating process of the heating container. In order to solve the technical problem, the vacuum coating device for the crystal ironed diamonds comprises a main box body, vacuum equipment is arranged at one end in the main box body, the vacuum equipment comprises a tank body, a plating material evaporation device is arranged in the tank body, the plating material evaporation device comprises a fixing column, the bottom of the fixing column is fixedly connected with the tank body, and the bottom of the fixing column is fixedly connected with the tank body. Threads are arranged outside the lower ends of the fixing columns. The evaporation disc can be replaced through the coating material evaporation device, and the replaced evaporation disc is cleaned, so that the phenomenon that the previous coating raw materials are easy to remain and accumulate around the evaporation disc in the long-term coating process is avoided.

The invention relates to a crushing machine of raw material for preparing a wood shaving artificial board. The machine comprises a box body, a driving device, an air blower, a crushing device, an auxiliary fixing device and a feeding device, wherein the driving device is installed on the front side of the box body, the air blower is installed at the lower end inside the box body, the crushing device is installed in the middle of the box body, the crushing device is located at the upper end of the air blower, the auxiliary fixing device is installed at the upper end of the box body, and the feeding device is installed at the right end of the box body. The crushing machine of the raw material for preparing the wood shaving artificial board can solve the problems that when existing wood shaving machining equipment is used for cutting treatment, the number of cutting tools is small, the cuttings generated through cutting treatment are large in size, the cutting tools are prone to be damaged and are complicated to replace, the wood material is directly cut and machined without limiting and fixing, severe shaking, splashing and even flying are generated in the wood material machining process, so that potential safety hazards and the like are generated in the operation process are solved.

The invention belongs to the technical field of lithium ion battery positive electrode materials, and provides a high-specific-energy lithium manganese iron phosphate positive electrode material and a preparation method thereof.The preparation method comprises the following steps that 1, carbon nanotubes are added into deionized water to be subjected to ultrasonic dispersion, modified xanthan gum, ammonia water and hydrazine hydrate are added to be stirred, the mixture is heated to continue to be stirred, suction filtration and washing are conducted, and carbon nanotubes are obtained; drying to obtain a carbon source; step 2, adding the lithium hydroxide solution into the phosphoric acid solution, stirring and dispersing, adjusting the pH value, adding the manganese sulfate solution and the ferrous sulfate solution, and carrying out hydrothermal synthesis reaction to obtain a hydrothermal reaction product; step 3, centrifuging, washing and drying the hydrothermal reaction product, and mixing the dried product with a carbon source to obtain a mixture; step 4, carrying out ball milling on the mixture to obtain powder; and step 5, calcining the powder, and cooling to obtain the product. The obtained lithium manganese iron phosphate positive electrode material has the advantages of uniform thickness of a carbon coating layer, excellent electrochemical performance, stable cycle performance and the like.

A method for depositing a metal compound coating on the surface of a polymer base material at low temperature comprises the following steps: placing the polymer base material in an atomic layer deposition chamber, vacuumizing, and adjusting the temperature and pressure of the chamber; activating the surface of the polymer base material by using plasma; injecting a metal organic precursor into the reaction cavity in a pulse manner at the temperature lower than 300 DEG C, and forming a uniform metal compound coating through plasma enhanced atomic layer deposition; and the redundant precursor is purged through gas, and the steps are repeated until the coating with the target thickness is obtained. According to the method, the surface of the plastic base material is modified under the condition that the temperature is lower than 300 DEG C through a plasma enhanced atomic layer deposition (PEALD) technology, the metal compound coating which is uniform in thickness and controllable in component is obtained, and the requirement for improving the biocompatibility of the surface of the implant in the medical field is met.

The invention discloses an aluminum electrolytic capacitor powder stacking sintered foil and a preparation method thereof, and belongs to the technical field of aluminum electrolytic capacitors. The preparation method of the aluminum electrolytic capacitor powder stacking sintered foil comprises the steps that aluminum powder and a dielectric substance precursor serve as raw materials, a dielectric substance is deposited on the surface of the aluminum powder through a chemical vapor deposition method, and the aluminum powder wrapped by the dielectric substance is obtained; the dielectric constant of the dielectric substance is greater than that of aluminum oxide; the method comprises the following steps: uniformly mixing aluminum powder wrapped by a dielectric substance, a binder and a solvent, coating an aluminum foil substrate with the mixture, drying, degreasing at 350-550 DEG C in an oxygen-containing atmosphere, sintering at 600-670 DEG C in an oxygen-free state, and energizing after sintering to obtain the aluminum electrolytic capacitor powder stacked sintered foil. According to the aluminum electrolytic capacitor powder stacking sintering foil prepared by the method, the aluminum electrolytic capacitor powder stacking sintering anode foil per unit area has excellent electrostatic capacity.

The invention discloses a laminated wood board production process, a laminated wood board and a board cutting machine, and belongs to the technical field of electrician laminated wood boards. The laminated wood board production process comprises the steps that S1, cutting is conducted, specifically, a board is obliquely cut to form veneers; s2, at least two single boards are bonded and spliced to form a laminate; s3, the laminate is placed in a hot press; s4, double-sided gluing is carried out on the laminated plate after hot pressing is completed; s5, the multiple laminates are stacked to form a plate blank, the bonding positions of every two adjacent laminates are arranged in a staggered mode, and the plate blank is placed in a pre-pressing machine to be pre-pressed; and S6, the pre-pressed plate blank is put into a hot press, the hot pressing temperature ranges from 120 DEG C to 140 DEG C, the plate blank is gradually pressed to the preset thickness, after the plate blank is pressed and formed and the temperature rises to the preset temperature, heat preservation forming is carried out, and cooling and discharging are carried out after forming. The production process solves the technical problem that the density of the electrical laminated board produced in a traditional mode is not uniform.

The invention relates to the technical field of conveying devices, and particularly discloses a solid waste improved foundation in-situ uniform mixing conveying device which comprises a soil crushing assembly and a soil turning assembly, the soil crushing assembly comprises a connecting plate, side plates are fixed to the two ends of the connecting plate in the length direction, and a first rotating shaft is installed between the two side plates; the soil turning assembly comprises a containing plate fixed between the two side plates, the two ends of the containing plate in the width direction are both bent upwards, and a second rotating shaft and a third rotating shaft are installed between the two side plates. According to the in-situ uniform mixing conveying device for the solid waste improved foundation, in the in-situ conveying process of soil at the foundation, the foundation is improved through the solid waste, the energy consumption of reciprocating transportation of the soil is reduced, and the construction period of foundation improvement is shortened.

The utility model relates to the technical field of falling film evaporation and concentration, in particular to a novel efficient anti-blocking falling film evaporator. Comprising an evaporator shell and a heat exchange mechanism, a material channel and a steam channel are arranged on the evaporator shell, the heat exchange mechanism is a heat exchange pipe, the heat exchange pipe is arranged in the evaporator shell, and a spiral angle is preset on the heat exchange pipe. According to the novel efficient anti-blocking falling film evaporator, the heat exchange pipes are efficient heat exchange pipes, the spiral angle structures on the surfaces of the heat exchange pipes enable the flowing direction of a liquid film to be repeatedly changed to cause sufficient heat exchange between the interiors of the liquid film, meanwhile, the thickness of the liquid film is more uniform, and the formed spiral shearing effect can reduce the viscosity of materials; liquid film turbulent flow is generated at a low flow rate, scabbing in the pipe is effectively prevented, the spiral angle on the surface of the pipe can increase the flow distance of the slurry, and the flow heat exchange time is prolonged under the condition that the flow rate is not changed, so that the evaporation concentration efficiency is higher.

The invention belongs to the technical field of weld joint corrosion prevention, and particularly relates to an automatic spraying detection device and method applied to an anti-corrosion material at a weld joint of a pressure steel pipe, the automatic spraying detection device comprises a workbench, a support and a bottom plate, the top end of the workbench is fixedly provided with a storage box used for storing the anti-corrosion material, and the workbench is fixedly provided with a turntable with a cavity; the rotating disc is communicated with the storage box through a communicating pipe, a plurality of conveying pipes are rotatably installed on the rotating disc, extension pipes are slidably installed on the multiple conveying pipes, spray heads are arranged at the top ends of the extension pipes, thickness gauges are arranged on the extension pipes, and a booster pump is arranged on the workbench. Automatic spraying and detection of the anti-corrosion material at the weld joint of the pressure steel pipe are achieved, the spraying efficiency is greatly improved, the uncertainty of manual operation is reduced, the thickness of an anti-corrosion layer is more uniform, the opportunity that workers make contact with the anti-corrosion material can be reduced, and the probability of occupational diseases is reduced.

The invention relates to the technical field of condensers, and discloses a high-efficiency heat exchange condenser system which comprises a mounting box and further comprises a fan arranged at the top of the mounting box, a plurality of heat exchange pipes fixedly connected into the mounting box, a plurality of spraying pipes and a plurality of water storage sleeves. The bottom of the transmission part is meshed with the stress wheel, one side of the stress wheel is attached to the transmission lead screw, the water storage sleeve is used for storing fluid, and the transmission part is impacted by fluid fluctuation, so that the multiple cleaning and scraping parts reciprocate outside the heat exchange pipe. The thickness of a water film formed by spraying water on the outer wall of the heat exchange pipe can be effectively limited through the water storage sleeve, dirt on the outer wall of the heat exchange pipe is treated through synchronous reciprocating movement of the multiple transmission lead screws, the cleanliness of the heat exchange pipe is guaranteed, the thickness of the pipe wall of the heat exchange pipe is uniform, the heat transfer efficiency of the heat exchange pipe is improved, and meanwhile the service life of the heat exchange pipe is prolonged. And the heat exchange effect of the fluid is improved.

The invention relates to multi-process combined injection molding equipment and an injection molding method.The injection molding equipment comprises a mold closing assembly, a range finder, a first injection assembly, a gas injection assembly, a second injection assembly, a manipulator and an infrared heater, the mold closing assembly comprises a fixed mold plate and a movable mold plate which are oppositely arranged, and a mold is arranged between the fixed mold plate and the movable mold plate; the range finder is arranged on the mold; the first injection assembly is used for injecting a foaming material of a product main body into the mold, and the first injection assembly communicates with the gas injection assembly; the second injection assembly is used for injecting a second component material into the mold; the manipulator is used for clamping the thermoplastic organic sheet, and the infrared heater is used for heating the thermoplastic organic sheet. Compared with the prior art, integrated lightweight product machining is completed on the same equipment, multiple parts are directly connected when formed in the mold, product transfer and recombination caused by multiple independent procedures are avoided, and the production efficiency and the production quality are effectively improved.

The invention belongs to the technical field of sodium battery material synthesis, and discloses an in-situ coating method of a sodium ion battery positive electrode material. On the basis of an O3 type sodium ion battery layered oxide electrode material, an amorphous coating layer is constructed on the surface of an oxide through a low-pressure vapor deposition method. The invention provides a novel positive electrode material coating method, the coated material can stably circulate under the high voltage of 2-4.2 V, and the air stability is obviously improved. The sodium ion battery positive electrode material disclosed by the invention is low in raw material cost and environment-friendly, the coating method is simple, and the method has pioneering and universality and has a good application prospect.

The invention relates to the technical field of automobile part machining, in particular to automobile part spraying equipment which comprises a machine table, a U-shaped plate, a metal plate, a spraying mechanism for spraying the metal plate and a driving mechanism for driving the spraying mechanism to horizontally move and spray. According to the metal plate spraying device, through mutual cooperation of the driving mechanism, the height adjusting mechanism and the angle adjusting mechanism, on one hand, the spraying height of the spraying mechanism can be conveniently adjusted according to the spraying requirement, so that the spraying mechanism keeps the same height all the time when spraying is conducted on different faces of a metal plate, and therefore the spraying uniformity is improved, and the spraying quality is improved; and on the other hand, angle adjustment of the spraying mechanism is achieved, so that the spraying mechanism is always kept in a perpendicular state with straight line faces of different angles, the spraying uniformity is further improved, the spraying quality is improved, meanwhile, the speed that a spraying head slides across a horizontal plate and an inclined plate is consistent, and it is guaranteed that the spraying thickness of a metal plate is uniform.

The utility model discloses TPU (thermoplastic polyurethane) composite fabric composite processing equipment which comprises a first mounting frame, a guide rod is slidably connected to the middle of the first mounting frame, a limiting plate is fixedly connected to the top end of the guide rod, and a gluing assembly is fixedly connected to the bottom end of the guide rod; and the gluing assembly comprises a gluing box, the front face of the gluing box is fixedly connected with a first motor, the output end of the first motor is fixedly connected with a rotating shaft, and the surface of the rotating shaft is fixedly sleeved with a gluing roller. According to the glue spreading device, the glue scraping plates are additionally arranged in the glue spreading box, when the glue spreading plates spread glue on the surface of the glue spreading roller, the first motor is started, the rotating shaft drives the glue spreading roller to rotate, and due to the fact that the glue scraping plates are arranged on the left side and the right side of the glue spreading roller respectively, glue can be flattened through the glue scraping plates while the glue spreading roller rotates; and meanwhile, the scraped glue is stored in a glue storage cavity formed by the gluing box and the glue scraping plate, and recycling is facilitated.

The invention relates to the technical field of metal surface treatment, in particular to a method for achieving titanium metal surface rapid boronizing through electric field induction nanometer assembly in molten salt, titanium dioxide powder, boron powder, inorganic salt and a nanometer particle wrapping agent are evenly mixed, and the molten salt containing nanometer TiB2 is obtained after heating reaction. Graphite and a titanium metal part are put into molten salt containing nano TiB2, the graphite serves as a positive electrode, the titanium metal part serves as a negative electrode, the surface area ratio of the positive electrode to the negative electrode is (3-10): 1, the nano TiB2 in the molten salt is assembled on the surface of the titanium metal part under the action of an electric field to form a boronizing layer, and the boronizing speed is 60-500 microns / h. Compared with an existing high-temperature boronizing technology with active boron atoms as a constituent unit, the high-temperature boronizing technology has the advantages that the boronizing speed can be remarkably increased, the high-temperature boronizing treatment time of titanium metal is shortened, energy is saved, cost is reduced, and meanwhile the negative influence of the high-temperature environment on the organization structure and the mechanical property of a titanium metal part is eliminated.

According to the high-precision tension control system for the solar cell backboard coating line, high-precision tension control is achieved based on an SINAMICS 120 servo dragging system, a Siemens S7-300 series PLC is adopted as a control core, a PROFIBUS-DP field bus communication network is established, CPU317-2DP serves as a master station, a field remote IO module and a CU320 driving unit serve as slave stations, and the high-precision tension control system for the solar cell backboard coating line achieves high-precision tension control. An industrial personal computer is used as a man-machine interaction medium, normal operation of the whole production line is achieved by setting tension and production speed, tension control is performed in a mode of combining a floating roller and a high-sensitivity tension sensor, a high-precision servo system S120 is used for dragging, high-precision control of tension is achieved, and actual operation of the system shows that the production efficiency is greatly improved. Compared with a traditional tension control system, the system has the advantages of being stable in tension control, high in precision, stable in production speed, friendly in man-machine, capable of achieving non-stop roll changing and capable of completely meeting the requirement for continuous production of the back plate.

The invention relates to the field of microwave plasma processing equipment, in particular to microwave plasma chemical vapor deposition equipment. The microwave plasma chemical vapor deposition equipment comprises a furnace tube in which a plasma cavity is formed, and the formed plasma cavity comprises an upper short circuit plate, a side wall and a lower short circuit plate; a substrate cold water table group is arranged above the lower short circuit plate, and a wafer is placed at the upper end of the substrate cold water table group; an air disc is arranged on the outer side of the upper end of the wafer; according to the microwave plasma chemical vapor deposition equipment, the gas disc is arranged above the wafer placed in the plasma cavity, so that the consistency of the concentration and the uniform distribution of the raw material gas at the upper end of the wafer can be fully ensured, and the uniformity of the concentration and the thickness of a substance deposited in the later period is further ensured; and particularly, the concentration of the deposited substances at the edge of the wafer can be ensured to be consistent, so that the quality of the produced deposited substances is relatively high.

The invention discloses a lithium metal interface modification method and a lithium metal battery, and the modification method comprises the following steps: carrying out surface treatment on lithium metal to obtain treated lithium metal; adsorbing the modification liquid by adopting a carrier material; placing the carrier material adsorbing the modification liquid on the treated lithium metal surface; applying a preset pressure to the carrier material; and removing the carrier material, standing and drying to obtain the lithium metal containing the artificial solid-liquid interface. The modification liquid is adsorbed to the surface of the lithium metal by adopting the carrier material, and the carrier material and the lithium metal are tightly attached through pressure, so that the modification liquid and the lithium metal can be fully subjected to in-situ chemical reaction, and the ASEI film on the modified lithium metal surface is uniform in thickness and relatively high in flatness; according to the lithium metal surface modification method, the thickness consistency and component distribution consistency of the lithium metal artificial solid-liquid interface can be improved, the modified lithium metal interface can effectively inhibit growth of lithium dendrites, and the cycle life of a lithium metal battery is prolonged.

The invention discloses a two-dimensional layered MXene nanosheet and a preparation method thereof, and belongs to the technical field of MXene preparation. The method comprises the following steps: (1) etching an MAX phase powder material by using hydrofluoric acid to obtain an etched MAX phase; (2) centrifuging and drying the etched MAX phase to obtain multi-layer MXene powder; (3) carrying out homogenization treatment on the multiple layers of MXene powder; and (4) carrying out rapid annealing treatment on the powder obtained after homogenization treatment to remove functional groups on the surface of MXene so as to prepare the MXene nanosheet with a regular structure and few defects. The method effectively avoids the oxidation problem of MXene, realizes feasible preparation with uniform thickness, stability, regular shape and fewer defects, and has the advantage of replacing an organic reagent intercalation preparation method to become a mainstream preparation method.

The invention relates to the technical field of fire prevention, and discloses a grid filling type non-expansive fire retardant coating multi-layer brushing method which comprises the following steps: firstly, spraying a fire retardant coating on a square steel column in a crossed manner to form a grid-shaped spraying inner layer; both volume change and sagging can be absorbed by the pits in the centers of the grids, and the overall thickness of the ridge line position is uniform; after the sprayed inner layer is initially set, the convex points are scraped off, a new fireproof coating is scraped in the grids and is thickened outwards to form the scraped outer layer, the effect similar to reworking is achieved while the total thickness reaches the standard, and defects existing in the sprayed inner layer and local thickness unevenness are covered. Meanwhile, the main body of the blade coating outer layer is separated by the grids, so that the phenomena of thin upper part, thick lower part, edge deformation and sagging caused by paint flowing are avoided; and the inner corner protection net is used for preventing the latticed spraying inner layer from influencing the edge position shaping of the blade coating outer layer, so that the thickness and the appearance of the coating layer can be qualified at a time.

The invention relates to the field of concrete pouring, in particular to a pavement pouring device for concrete construction. The technical problems that an existing device cannot well construct an inclined road surface, and stress is not uniform when the inclined road surface is solidified are solved. According to the technical scheme, the device comprises two first supporting frames, the tops of the two first supporting frames are jointly connected with a supporting plate in a sliding mode, and the device further comprises a movable driving mechanism, an angle adjusting mechanism, a containing mechanism and a vibration discharging mechanism. The height of the buoyancy ball is controlled through the inclined first connecting rod when the second connecting rod rotates, so that the height of the buoyancy ball is lower when an inclined road surface is poured, the thickness judgment during pouring of the inclined concrete road surface is reduced, the thickness of the buoyancy ball is matched with the inclination angle of the concrete road surface, and a flowing space is reserved for flowing of concrete; the thickness uniformity of the concrete pavement is ensured, and the thickness detection of the concrete pavement at different inclination angles is realized.