43results about How to "Efficient coating" patented technology

The utility model provides a light shielding pipe polishing treatment device, and belongs to the field of light shielding pipes. The problem that the ultra-long and small-diameter light shielding pipe is difficult to polish is solved. The light shielding pipe fixing mechanism comprises a fastening assembly which is used for fixing a light shielding pipe; the grinding mechanism comprises a driver, a rod piece connected to the rotating end of the driver and a grinding head assembly connected to the far end of the rod piece, the diameter of the grinding head assembly is larger than the inner diameter of the light shielding pipe, and the grinding head assembly comprises a flexible layer capable of being compressed in the radial direction of the light shielding pipe and a grinding layer arranged on the peripheral side of the flexible layer in a sleeving mode; the flexible layer is used for supporting the polishing layer to be attached to the inner wall of the light shielding pipe when the inner wall of the light shielding pipe is polished. The light shielding pipe polishing device is mainly used for polishing light shielding pipes.

The invention relates to the technical field of electrostatic spraying, and discloses airflow-assisted electrostatic spraying equipment, a preparation method and application, the airflow-assisted electrostatic spraying equipment comprises a material assembly used for conveying a liquid material, a coaxial needle and a triaxial displacement mechanism capable of moving in three axial directions, the material assembly is connected to an outer needle of the coaxial needle, and the airflow-assisted electrostatic spraying equipment further comprises an air source assembly, the gas source assembly is used for conveying pressure-adjustable high-pressure gas to the inner needle of the coaxial needle; a shell of the coaxial needle is connected to an electrostatic generator, and the coaxial needle is fixedly connected with a sliding block of the three-axis displacement mechanism through a needle head fixing support. Compared with electrostatic spraying without airflow assistance, the air source assembly is adopted for conveying high-pressure air, efficient and rapid spraying can be achieved, and the device is suitable for fine spraying of low-viscosity liquid and heterogeneous liquid; compared with static-free mechanical spraying, the sphericity degree of the obtained microspheres is obviously improved, the particle size is smaller and more uniform, and the fog pollution in the spraying process is reduced in a large area.

The invention relates to the technical field of double-layer glass processing, in particular to double-layer hollow glass gluing equipment and a coating control system.The double-layer hollow glass gluing equipment comprises a glue extruding barrel pump assembly, the glue extruding barrel pump assembly comprises an auxiliary assembly used for placing a glue barrel, and a pressing disc assembly used for extruding glue is correspondingly arranged above the auxiliary assembly; a gear pump for conveying colloid is arranged on the pressure plate assembly; the gluing head assembly assembly comprises a glue supply pipe assembly, one end of the glue supply pipe assembly is connected to the gear pump, the other end of the glue supply pipe assembly is connected with a nozzle assembly, and a guide rail base assembly used for lifting is arranged on one side of the gluing head assembly assembly; according to the coating device, the coating requirement of the coating device in hollow glass production is met, efficient, accurate and stable thermoplastic spacing bar coating is achieved through cooperative work of all the assemblies, and therefore the hollow glass with good performance is produced.

The invention discloses a liquid-phase coated graphite negative electrode material, a preparation method thereof and a lithium ion battery, and the preparation method of the liquid-phase coated graphite negative electrode material comprises the following steps: adding asphalt into an organic solvent, and fully mixing to obtain an asphalt solution; and adding artificial graphite into the asphalt solution, fully mixing, heating, vacuumizing to remove the organic solvent, and carbonizing to obtain the liquid-phase coated graphite negative electrode material. According to the liquid-phase coated graphite negative electrode material, the preparation method thereof and the lithium ion battery provided by the invention, the fast-charging type graphite negative electrode material is prepared by a liquid-phase coating method, high capacity and excellent cycle performance are considered at the same time, and the liquid-phase coated graphite negative electrode material has remarkable practical value in the aspects of increasing high-energy density and high-rate charge and discharge requirements.

The utility model relates to a cylindrical battery coating structure and a cylindrical lithium ion battery, and belongs to the technical field of cylindrical batteries. The cylindrical battery coating structure comprises a sleeve, and the sleeve is arranged on the periphery of a cylindrical battery in a sleeving manner; two ends of the sleeve in the length direction correspondingly cover the outer edge of the positive end face and the outer edge of the negative end face of the cylindrical battery; the radial section area of the cylindrical battery after being sleeved with the sleeve is S0, the area, wrapped by the sleeve, of the end face of the positive electrode end of the cylindrical battery is a first area, the area of the first area is S1, the area, not wrapped by the sleeve, of the end face of the negative electrode end of the cylindrical battery is a second area, the area of the second area is S10, and the ratio of S1 to S0 is larger than or equal to 40% and smaller than or equal to 60%; the ratio of S10 to S0 is greater than or equal to 41% and less than or equal to 61%. According to the cylindrical battery coating structure and the cylindrical lithium ion battery provided by the utility model, the sleeve has a good coating effect on the positive electrode end and the negative electrode end of the cylindrical battery.

The utility model relates to the field of production equipment. The utility model aims at providing a leather piece gluing machine. The leather piece gluing machine comprises a machine table, a plurality of glue outlet mechanisms arranged on the machine table and a plurality of rotation mechanisms correspondingly arranged at the glue output ends of the glue outlet mechanisms. The autorotation mechanism is used for bearing the leather sheets and driving the leather sheets to autorotate, and glue flows out from the glue output end of the glue outlet mechanism and coats the peripheries of the autorotation leather sheets. The leather piece gluing device is high in production efficiency and good in gluing effect, leather pieces of different types and specifications can be glued, manpower is reduced, and the effects of reducing cost and improving efficiency are achieved.

The invention relates to high-solid-content AlN ceramic slurry for tape casting, a substrate and a preparation method of the substrate, and belongs to the field of ceramic substrates. The ceramic slurry is prepared from the following components in percentage by mass: 60 to 68 weight percent of high-purity AlN powder, 3 to 6 weight percent of dispersing agent, 3 to 5 weight percent of binding agent, 4 to 6 weight percent of plasticizer, 3 to 6 weight percent of sintering aid and 32 to 45 weight percent of solvent, the mass ratio of the plasticizer to the binder ranges from 3: 5 to 4: 5. By regulating and controlling the proportion of the dispersing agent in the AlN ceramic slurry and the solid content of the high-purity AlN powder, the slurry has excellent flowability, dispersity and stability while maintaining high solid content, and is suitable for a tape casting process. The AlN ceramic substrate prepared through sintering is high in density and excellent in heat conductivity, and engineering application can be achieved.

This invention relates to the field of battery technology, and more particularly to a positive electrode lithium replenisher, its preparation method, a positive electrode sheet, and a lithium battery. The aforementioned positive electrode lithium replenisher includes a core and a shell, with the shell covering the surface of the core to isolate the core from the side reaction environment. The core is a lithium-rich material, specifically at least one of Li5FeO4, Li5ReO6, and Li6CoO4. The shell is cobalt boride. This core-shell structured positive electrode lithium replenisher with cobalt boride as the shell effectively coats the core material, improves the air stability of the positive electrode lithium replenisher, reduces residual alkali, and thus enhances the battery's energy density and cycle performance.

The present invention relates to a method of manufacturing a positive electrode active material for a lithium secondary battery, comprising the steps of (a) preparing a positive electrode active material dispersion by mixing a positive electrode active material capable of reversible adsorption and release of lithium ions, and a solvent; (b) adding and mixing a raw coating material comprising lithium (Li) and niobium (Nb) to prepare a coating solution comprising a niobium-based compound; (c) adding to the positive electrode active material dispersion of step (a), the coating solution of step (b) to form a coating layer on the surface of the positive electrode active material; and (d) pressing filtering the product of step (c) to remove the solvent, and a positive electrode active material for a lithium secondary battery manufactured thereby.

The invention relates to the technical field of batteries, and discloses a battery cell and a battery pack, the battery cell mainly comprises a pole group, an insulating film, two first adhesive films and two second adhesive films; the insulating film coats the periphery of the pole group; the two first adhesive films are folded respectively, wrap the corners of the bottom of the insulating film and are located on the two opposite sides of the insulating film, and each first adhesive film is provided with at least one folded edge after being folded; and the two second adhesive films respectively cover the outer surfaces of the flanges of the two first adhesive films and are used for fixing the flanges. According to the battery cell disclosed by the invention, the pole group is coated with the insulating film, and then the bottom corners of the insulating film are coated with the two first adhesive films, so that insulation performance reduction caused by slight material falling or foreign matter accumulation of the pole pieces can be avoided, the use reliability of the insulating film is improved, the use safety of the battery cell is improved, and the service life of the battery cell is prolonged; and the flanging of the first adhesive film is fixed through the second adhesive film, so that the flanging formed after folding can be prevented from being warped, and the pole group can be put into the shell conveniently.

The application belongs to the technical field of new energy battery materials, and discloses a composite solid electrolyte and a preparation method and system thereof. The preparation method comprises the following steps: under an inert atmosphere, a pretreated sulfide solid electrolyte and a pretreated halide solid electrolyte are put into a cavity; under the action of an ultrasonic standing wave, the sulfide solid electrolyte is suspended, and the halide solid electrolyte is dispersed; a gradient electric field in the vertical direction is formed through upper and lower electrode plates in the cavity, so that the halide solid electrolyte is coated on the sulfide solid electrolyte, and the composite solid electrolyte is obtained. The method provided in the application realizes uniform coating of LIC on LPSC, the coating layer is uniform, the interface is firmly combined, the interface stability and the oxidation resistance of LPSC are effectively improved, and the ionic conductivity of LIC and LPSC is retained.

The utility model relates to a dispensing tool for carton forming processing, which comprises a main frame body, a rolling dispensing assembly is rotatably mounted on the main frame body, and the rolling dispensing assembly is connected with a pressurized liquid supply assembly mounted on the main frame body through a liquid supply supporting pipe. The rolling dispensing assembly comprises a rotating disc, supporting rib rods, a mounting ring plate and a telescopic dispensing mechanism, the rotating disc is rotatably connected with the main frame body, and the rotating disc is coaxially connected with the mounting ring plate through the supporting rib rods which are annularly arranged at intervals; and a plurality of telescopic dispensing mechanisms which radially coincide with the mounting ring plate are inserted into the mounting ring plate in a rotational symmetry manner. According to the utility model, the dispensing spacing distance can be changed according to requirements, so that the dispensing quality and the dispensing efficiency are improved, and meanwhile, the pressure-contact glue discharging can be realized, so that the overflow and splashing of glue liquid are reduced.

The utility model discloses a vacuum coating device convenient for fast replacement of coating material, and relates to the field of vacuum coating devices, the vacuum coating device comprises a supporting seat, a supporting rod and a coating assembly, the center of the supporting seat is fixedly connected with a supporting push rod, the top end of the supporting push rod is fixedly connected with a sealing frame, and rotating plates are arranged on two sides in the sealing frame. According to the vacuum coating device capable of conveniently and rapidly replacing the coating material, through the arrangement of the limiting assembly and the coating assembly, in the using process of the vacuum coating device, a workpiece is stably limited, the situation that the workpiece is loosened and falls off during subsequent workpiece coating is avoided, the workpiece can be conveniently turned over subsequently, comprehensive workpiece coating is guaranteed, and the working efficiency is improved. And meanwhile, the number of the coating assemblies is two, and coating materials in the two coating assemblies are different, so that a worker can conveniently and quickly replace the coating materials, the vacuum coating device is more efficient when coating a workpiece, and the worker can conveniently use the vacuum coating device.

The utility model provides a portable tool of painting in high place relates to the field of painting, this portable tool of painting in high place, this portable tool of painting in high place, including telescopic handle, electric telescopic link, and the rotation mechanism rotation is connected between electric telescopic link and telescopic link, and the fixed connection of electric telescopic link output end has the shell, the fixed connection of storage tank is established in the shell upper end, and the discharge port is established between the shell and storage tank, and the fixed connection of discharge pipe has the discharge port, and the rotation is connected in the shell and has the roller shaft, and the outer surface of roller shaft is sleeved with the rolling brush, this portable tool of painting in high place, solved the roller brush when painting with the roller brush short, when the equipment painting is not good to brush the top, need the operating personnel to stand the scaffold or lift truck of setting up and carry out the painting operation, and need to dip the paint frequently, and the painting efficiency is low, and the quality can not guarantee the problem.

The utility model discloses a vacuum sputtering device for efficiently and uniformly depositing a copper film, which relates to the technical field of film plating machines and comprises a master console, an electronic control device arranged in the master console, a film plating box arranged in the middle of the top surface of the master console, a box door hinged to the front end surface of the film plating box, a film plating mechanism arranged in the film plating box, and a connecting structure arranged between the film plating box and the box door. The coating mechanism comprises an adjusting assembly, an anode assembly, a cathode assembly and a magnetic control assembly; according to the utility model, through the matching of the adjusting assembly and the cathode assembly, the distance between the electrodes can be freely adjusted, so that the coating uniformity is ensured, the coating uniformity is improved, and the uniform coating capability is realized; through cooperation of the cathode assembly and the magnetic control assembly, the sputtering direction of the plasma can be restrained to the maximum degree, so that the coating efficiency is improved, and the efficient coating capacity is achieved; and finally, the problem of low coating quality caused by improper electrode distance or serious plasma dissipation during coating of the existing equipment is solved.

The invention discloses an altrenogest sustained-release medicament as well as a preparation process and application thereof, and relates to the field of veterinary drugs. When the altrenogest sustained-release medicament is prepared, altrenogest reacts with carboxyl-terminated polylactic acid-glycolic acid to prepare drug-loaded nano-particles, chitosan reacts with 3, 4-dihydroxyphenylpropionic acid and then reacts with a carbodiimide solution to prepare modified chitosan, and the modified chitosan and the 3, 4-dihydroxyphenylpropionic acid react to prepare the altrenogest sustained-release medicament. The preparation method comprises the following steps: activating drug-loaded nano-particles with 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride and N-hydroxysuccinimide, and then reacting with a modified chitosan solution to prepare hydrophilic drug-loaded nano-particles; the hydrophilic drug-loaded nanoparticles, hydroxypropyl-beta-cyclodextrin, magnesium stearate, hydroxy propyl cellulose and lactose are pressed into tablets by a direct tabletting method to prepare the medicine-loaded hydrogel. The altrenogest sustained-release medicament prepared by the invention has good sustained-release performance and drug release rate.

The present invention discloses an atomizing coating device for a diaper bottom film, comprising a bottom film transmission mechanism, which is composed of a transmission box, an arc-shaped guide bracket and a pressure roller. The transmission box is placed on the ground through a foot pad support, the arc-shaped guide bracket is installed on the top of the transmission box, and the pressure roller is evenly arranged on the top surface of the arc-shaped guide bracket. The surface of the arc-shaped guide bracket is sequentially embedded with fixed bearings, which are connected to the pressure roller. A plurality of bottom film transmission pressure wheels are sequentially sleeved on the surface of the pressure roller. A pulley is provided at one end of the pressure roller, and transmission belts are sequentially sleeved on the surfaces of the plurality of pulleys, wherein a stepping motor is installed at the end of the pressure roller, and a coating mechanism A is installed on the side of the transmission box. The pressure roller is installed through the transmission box, the arc-shaped guide bracket and the fixed bearing.

The invention relates to a small and convenient oxygen isotope nuclear reaction target manufacturing process and device, a reaction target lining and a sputtering target material are arranged in a vacuum chamber of a magnetron sputtering target manufacturing device, a sputtering electric field is provided by adopting a radio frequency power supply, and the flow of argon and oxygen filled into the vacuum chamber and the pressure in the vacuum chamber are controlled; the chromium oxide film layer is sputtered on the reaction target lining at a stable rate to form a film, and the oxygen isotope nuclear reaction target is prepared. The content of nitrogen in the chromium oxide film layer prepared by the process is extremely low, the abundance of oxygen isotope reaches 70%, and the applicability of the film layer in nuclear reaction cross section measurement is greatly enhanced. The method has the remarkable advantages of efficient coating, excellent film quality, simplicity and convenience in operation, environment friendliness, energy conservation and the like. The magnetron sputtering device improves the sputtering efficiency and the power efficiency through the synergistic effect of a magnetic field and an electric field, and ensures uniform deposition and strong adhesive force of the film. The device is compact in structure, flexibly adapts to various target materials and process requirements, reduces environmental pollution and conforms to the green production concept.

The utility model relates to the related technical field of floor surface coating, and discloses floor surface coating equipment which comprises a coating rack, a plurality of coating rollers are rotatably arranged in the coating rack, a storage plate which slides up and down to be close to or far away from the coating rollers is arranged on the lower sides of the coating rollers, and the coating rollers are arranged on the storage plate. And a coating space for placing the floor is formed between the storage plate and the coating roller. Through the arrangement of the coating rack, the whole coating process can be carried out in a stable environment, and through the up-down sliding of the storage plate, the floor can slide up and down along the storage plate so as to adjust the distance between the floor and the coating roller; according to the floor surface coating device, the purpose of adapting to surface coating of floors with different thickness specifications is achieved, the coating distance can be accurately adjusted through the arrangement of a limiting block and a distance measuring caliper, the purpose that the floor surface can be effectively coated is guaranteed, and the floor surface coating quality is guaranteed.

The utility model relates to the field of production equipment. The leather piece air-drying gluing machine comprises a machine table, a plurality of glue outlet mechanisms arranged on the machine table and a plurality of rotation mechanisms correspondingly arranged at the glue output ends of the glue outlet mechanisms, and an air-drying mechanism used for air-drying leather pieces is arranged on the rear side of the machine table; the autorotation mechanism is used for bearing the leather sheets and driving the leather sheets to autorotate, and glue flows out from the glue output end of the glue outlet mechanism and coats the peripheries of the autorotation leather sheets; a leather piece conveying mechanism is arranged between the autorotation mechanism and the air drying mechanism, and leather pieces coated with glue are conveyed from the autorotation mechanism to the air drying mechanism through the leather piece conveying mechanism. The leather piece gluing device is high in production efficiency and good in gluing effect, leather pieces of different types and specifications can be glued and air-dried, manpower is reduced, and the effects of reducing cost and improving efficiency are achieved.

The utility model relates to an elastic gluing device for gluing a flexible plate, which applies pressure to a floating pressing plate through an elastic assembly, and drives the floating pressing plate to compress a spring when the flexible plate is conveyed, so that the glue coating thickness is controlled, and the control is more convenient. Meanwhile, the electronic element groove is formed in the coating area, the electronic element is arranged in the electronic element groove, so that glue can be prevented from being smeared on the electronic element, and the high non-coating surface is arranged corresponding to the first area where glue cannot be smeared, and is in close contact with the first area, so that the glue cannot enter the space between the first area and the non-coating surface; and a gap is reserved between the second area and the coating surface, so that glue can enter the gap for coating, glue leakage can be effectively avoided, and glue coating in the second area is realized. And meanwhile, the elastic assembly can directly penetrate through the flexible plate when the flexible plate meets the connector, the gluing device does not need to be disassembled, the coating efficiency is improved, glue coating is more uniform through elastic force applied by the elastic assembly, and the glue coating device can adapt to glue coating of different coating areas with different thicknesses.

The invention discloses a granular gel-based living body material as well as a preparation method and application thereof. The particle gel-based living body material comprises hydrogel particles, sulfydryl-modified sulfate group-containing macromolecules and platelet-rich plasma dispersion liquid, and the particle gel-based living body material is of a cross-linked structure; photosynthetic oxygen production microorganisms are wrapped in the hydrogel particles. The hydrogel particles are prepared from branched macromolecules with double bonds and modified natural macromolecules through Michael addition polymerization, and the modified natural macromolecules are amino or sulfydryl modified natural macromolecules. The living body material is high in biological safety and stability, controllable release of the growth factors can be achieved, burst release and overhigh local concentration of the growth factors are prevented, and therefore the bioavailability of the growth factors is improved, and the lasting period of the growth factors is prolonged.

The application discloses a self-repairing magnesium-based composite hydrogen storage material and a preparation method thereof, and belongs to the technical field of solid-state hydrogen storage materials. The composite hydrogen storage material comprises a magnesium-based hydrogen storage base body and microcapsules dispersed in the magnesium-based hydrogen storage base body. The microcapsules have a core-shell structure, the shell layer is a thermally induced high polymer material, and the core is a low-melting-point metal repair agent or an organic repair agent. In the recycling process of the hydrogen storage material, when microcracks are generated in the base body due to the volume change of hydrogen absorption and release, the microcapsules are broken, the repair agent is released and melted and flows at a working temperature to fill the cracks, and is solidified after cooling, so that the automatic repair of the cracks is realized. The microcapsule self-repairing technology is introduced into the field of magnesium-based hydrogen storage materials for the first time, the capacity attenuation problem caused by the recycling pulverization of the magnesium-based material is effectively solved, the service life of the material is significantly prolonged, and the capacity retention rate is not less than 90% after 100 cycles.

The invention relates to the technical field of aerogel, in particular to a silicon dioxide aerogel-aramid fiber composite material with gradient density and a preparation method of the silicon dioxide aerogel-aramid fiber composite material. According to the method provided by the invention, the aramid fiber and the SiO2 / POSS matrix are combined to form the composite insulating material with a three-dimensional interpenetrating network structure through the process steps of sol preparation, gradient gelation and directional forming, and meanwhile, Fe3O4 nanoparticles are modified on the aramid fiber, so that magnetic field regulation and control of fiber orientation are realized. According to the preparation method provided by the invention, the problems of weak interface bonding force, non-uniform fiber orientation and poor performance stability of the aramid fiber-SiO2 composite material in related technologies are solved.

The present invention relates to the field of battery technology, and in particular to an insulating structure of a cell cover and a cell. The insulating structure of the cell cover includes: an insulating film, on which a fold is formed to divide the insulating film into a first adhesive portion, a second adhesive portion and a third adhesive portion; the second adhesive portion and the third adhesive portion are alternately arranged around the circumference of the first adhesive portion; the first adhesive portion is attached to the cover, the second adhesive portion is bent along the fold so that part of the second adhesive portion is attached to the first surface of the shell, and the third adhesive portion is bent along the fold so that it is attached to the second surface of the shell. The present invention can achieve insulation protection for the cover and allow part of the insulating film to be attached to the shell of the cell, so that the connection between the cover and the shell can be effectively covered, and the insulation effect meets the requirements of the whole package, so as to achieve the purpose of reducing costs and increasing efficiency; in addition, the pasting area is increased, the pasting strength is improved, and the problems of warping and falling off are avoided, thereby ensuring the insulation effect and production efficiency of the cell.

This utility model discloses an insulating layer coating device for insulating paper, belonging to the field of insulating paper processing technology. The device includes a main body, with transmission mechanisms fixedly connected to both ends of a rotating shaft, and reciprocating mechanisms fixedly connected to the outward-facing ends of two scrapers. A reset mechanism is connected between the first support and the scraper, and a scraping mechanism is slidably connected to the inward-facing ends of both first supports. This utility model significantly optimizes the insulating paper coating process through an innovative design of a linkage-type mechanical transmission and an elastic reset mechanism. The transmission mechanism drives the scraper in automated reciprocating motion, eliminating the need for an additional power source and significantly improving coating efficiency. The scraper removes excess liquid from both ends of the roller shaft in real time, preventing contamination of the insulating paper edges and ensuring uniform coating quality. The inclined scraper guides the coating liquid back to a collection box, enabling resource reuse and reducing production costs.

The invention discloses a preparation method of high-solid-content and high-flowability sodium ion aqueous positive electrode slurry, which comprises the following steps: S1, preparation of a glue solution: adding a binder into deionized water, and stirring to obtain the glue solution; s2, preparation of a high-fluidity glue solution: adding a first glue solution flow regulator into the glue solution, and stirring at a high speed to obtain the high-fluidity glue solution; s3, preparing a weakly alkaline glue solution, namely adding a second pH flow regulator into the high-flowability glue solution, and stirring to obtain the weakly alkaline glue solution; s4, preparation of a conductive adhesive solution: adding a first conductive agent into the alkalescent adhesive solution, and stirring to obtain the conductive adhesive solution; s5, preparation of first slurry: adding the active substance material into the conductive adhesive solution in batches, stirring and dispersing, and adjusting the viscosity to obtain the first slurry; and S6, preparation of finished slurry: adding the second conductive agent into the first slurry, and stirring and dispersing at a medium-low speed to obtain the final slurry. The invention has the characteristics of good fluidity, high solid content and green and environment-friendly process.

The invention provides a preparation method of water-resistant spherical aluminum nitride-boron nitride composite powder. The preparation method comprises the following steps: heating a boron source, an aluminum source, a carbon source, an alkaline nitrogen source and distilled water in a reaction kettle for reaction to obtain aluminum nitride-boron nitride precursor slurry; then, uniformly mixing the aluminum nitride-boron nitride precursor slurry with yttrium aluminate, and performing spray granulation to obtain a spherical aluminum nitride-boron nitride precursor; then putting the spherical aluminum nitride-boron nitride composite powder into an atmosphere furnace for melting and calcining under a protective atmosphere to obtain spherical aluminum nitride-boron nitride composite powder; and finally, modifying through a coupling agent and resin to obtain the water-resistant spherical aluminum nitride-boron nitride composite powder. The powder has the advantages of higher sphericity, uniform particle size distribution, smooth surface, compact structure and excellent flowability and dispersity; the resin coating layer effectively improves the hydrolysis resistance of the powder, and enhances the long-term stability and reliability of the powder.

The present application relates to lithium battery electrode material technical field, specifically to a kind of fluidized bed element doped silicon-carbon negative electrode material and its preparation method, lithium battery;Preparation method includes: the boron lithium compound is placed in heating container, inert carrier gas is imported, heating makes it be gaseous form, carrier gas is connected fluidized bed reactor gas path, gaseous boron lithium compound is imported into the fluidized bed that has been ahead of time into porous carbon, boron lithium element co-doping is carried out;Then again pass into silane mixed gas, gas phase cracking deposition silicon, form boron lithium element co-doped silicon-carbon material, or the addition timing of silane mixed gas is same with the addition timing of gaseous boron lithium compound;Finally pass into carbon source, carry out CVD carbon coating;The carbon-coated boron lithium element co-doped silicon-carbon material prepared by the present application can improve ion diffusion rate and electronic conductivity, significantly improve battery kinetics and initial efficiency.

This utility model relates to a tooling fixture for processing tubular parts, including a base and a coating box fixed on the base. Connecting seats are provided on both sides of the coating box, and a fixing component is provided on the top of the connecting seats. One set of fixing components has a metal tube on it, with the other end of the metal tube passing through the coating box and inserted into the center of the other set of fixing components. A pushing component is also provided on the base, with its telescopic end contacting the end face of the metal tube and pushing it towards the coating box. This application utilizes the fixing component to movably clamp the metal tube, enabling the entire metal tube to rotate via the drive structure on the connecting seat. Simultaneously, the tube can move horizontally within the fixing component. Therefore, workers can continuously feed materials based on this structure. Compared to traditional coating equipment, the working process is more stable, greatly improving production efficiency and quality, and it is very convenient to use.