135results about How to "Improve the wrapping effect" patented technology

The invention discloses a preparation method of a composite sodium iron phosphate positive electrode material with high compaction density, which is characterized by comprising the following steps: (1) mixing a sodium source, an iron source, a phosphorus source, a carbon source and the like for preparing the composite sodium iron phosphate positive electrode material in proportion to obtain a precursor aqueous solution; (2) adding a surfactant into the precursor aqueous solution, grinding and uniformly mixing to obtain a homogeneous precursor aqueous solution; (3) carrying out drying granulation on the homogeneous precursor aqueous solution by using a spray drying technology to obtain composite sodium ferric phosphate precursor particles; and (4) performing high-temperature heat treatment on the composite sodium ferric phosphate precursor particles under the protection of inert gas to obtain the composite sodium ferric phosphate positive electrode material. The sodium-ion battery positive electrode material and the electrode plate with high compaction density can be obtained, the reversible specific capacity of the sodium-ion battery is improved, the problem of low gram capacity exertion is solved, the battery capacity is improved, and high-quality sodium-ion battery supply is provided for the field of energy storage.

The invention discloses an antibacterial moisture-absorption softening agent and a preparation method thereof. The preparation method comprises the following preparation steps: 1, preparing a softener; the preparation method comprises the following steps: S1, reacting toluene diisocynate with polyethylene glycol in a solvent to generate an intermediate I; s2, reacting the intermediate I with tetramethyldipropylenetriamine in an inert gas atmosphere to generate an intermediate II; s3, carrying out reaction on the hydrogen-containing silicone oil, allyl polyoxyethylene ether and allyl epoxy terminated polyoxyethylene ether in a solvent and a catalyst to generate modified silicone oil; and S4, carrying out a reaction on the modified silicone oil and a norfloxacin aqueous solution in a solvent, then adding the intermediate II into a reactant, carrying out a reaction for a period of time, and removing impurities to obtain the antibacterial moisture-absorption softening agent.

The invention provides a secondary sizing agent as well as a preparation method and application thereof. The secondary sizing agent comprises the following components: a main film-forming agent, an auxiliary film-forming agent, a lubricant, a silane coupling agent and water, wherein the main film-forming agent is an aqueous epoxy solution, the auxiliary film-forming agent comprises a low molecular weight epoxy emulsion and an aqueous polyurethane emulsion, and the lubricant comprises an organosilicon lubricant and an ionic lubricant. In the scheme, the secondary sizing agent formed by mixing the main film-forming agent, the auxiliary film-forming agent, the lubricant and the silane coupling agent with proper types and proper contents can endow the silicon carbide fiber with excellent wear resistance, folding resistance and mechanical properties. Compared with one-time sizing, the number of times of wear resistance of the fiber yarn is increased by more than 10 times, the yarn breaking rate in the fabric processing process is greatly reduced from 10% to 0.5%, the surface smoothness of the prepared fiber fabric is greatly improved, the performance of the composite material prepared through the impregnation method is integrally improved, the bending strength is obviously improved, and the performance requirement of the three-dimensional fabric can be completely met.

The invention relates to a positive electrode material, in particular to a ternary positive electrode material, a secondary battery and a preparation method of the secondary battery. The preparation method comprises the following steps: (1) mixing a lithium source, a ternary precursor and a metal additive, carrying out first sintering, and crushing and sieving to obtain a sintered material; (2) mixing the sintered material, a water-soluble carbon source, a water-soluble metal salt and water, heating in a closed manner, cooling to room temperature, taking out, and drying to obtain a dried material; and (3) carrying out secondary sintering and sieving on the dried material to obtain the ternary positive electrode material.According to the preparation method of the ternary positive electrode material, the metal additive is firstly added to carry out doping modification on the ternary precursor, then the water-soluble carbon source, the water-soluble metal salt and the water are added at the same time, and the ternary positive electrode material is prepared through the synergistic effect of wet coating and closed heating. The ternary precursor is coated more uniformly, and the ternary positive electrode material is prevented from being corroded by substances such as electrolyte, so that the battery containing the ternary positive electrode material has more excellent electrical properties.

The invention relates to the technical field of fire extinguishing agents, and discloses a thermosensitive lithium battery special fire extinguishing agent and a preparation method thereof.The thermosensitive lithium battery special fire extinguishing agent comprises, by weight, 1-5 parts of a surfactant, 10-25 parts of an aprotic solvent, 2-5 parts of a fire extinguishing agent, 2-5 parts of a microcapsule agent, 3-10 parts of a temperature reducing agent, 2-10 parts of a thermosensitive expanding agent, 1-8 parts of a thermosensitive thickening agent and 70-100 parts of deionized water. According to the special fire extinguishing agent provided by the invention, a thermosensitive expanding agent, a thermosensitive thickening agent and a microcapsule medicament are added into a water-based fire extinguishing agent. And when meeting high temperature of flame, the fire extinguishing agent generates thermal expansion and increases viscosity, so that the adhesive force of the water-based fire extinguishing agent on the surface of the lithium battery is enhanced.

The invention discloses a composite wall material of a microcapsule, the microcapsule using the composite wall material and a preparation method of the microcapsule, and relates to the technical field of daily chemical products. The wall material of the microcapsule comprises polysiloxane, an epoxy-polyamine polymer and polyamide-amine, and the polysiloxane, the epoxy-polyamine polymer and the polyamide-amine are in covalent linkage. The essence microcapsule prepared from the composite wall material of the microcapsule has excellent friction aroma release performance and excellent stability.

The invention relates to the technical field of medicine preparation, and particularly discloses a preparation method and application of a xantinol nicotinate pharmaceutical composition, and the preparation method comprises the following steps: step S1, preparing the following raw materials in parts by weight: 6.2-7.6 parts of xantinol nicotinate, 86-98 parts of purified water, 16-22 parts of a filler, 64-76 parts of a coating solution, 14-20 parts of a flavoring agent, 42-54 parts of a modified disintegrating solution and 2-4 parts of a lubricant; step S2, preparing the xantinol nicotinate pharmaceutical composition; the coating liquid and the modified disintegrating liquid are added, active functional groups contained in the coating liquid can form hydrogen-bond interaction with the active ingredients of the medicine, flexible long-chain alkane on the coating liquid can be entangled with alkyl chains on the modified disintegrating agent, the modified disintegrating agent not only contains a cellulose nanocrystal structure, but also contains a carboxymethyl structure, so that the cellulose nanocrystal-modified disintegrating agent has the advantages that the cellulose nanocrystal-modified disintegrating agent can be applied to the preparation of the medicine; through the combined action of the structures, the coating property, the disintegration property and the slow release property of the xantinol nicotinate pharmaceutical composition are improved.

The invention discloses an all-solid-state battery and a preparation method thereof, and belongs to the technical field of solid-state batteries. Comprising electrolyte crushing, mixing and coating processes, an acoustic resonance method is used in each process, a final solid electrolyte is obtained, the electrode material is prepared through the acoustic resonance method based on the prepared solid electrolyte, the specific capacity of the electrode material prepared through the acoustic resonance method is improved, and compared with an existing mainstream ball milling process, the specific capacity of the electrode material is greatly improved. And the process time is reduced from several hours to minute level, so that the efficiency of each flow is greatly improved, and the preparation efficiency of the whole all-solid-state battery is further improved.

The invention discloses a high-shear dynamic mixing reaction device for preparing flexible particles and a dynamic treatment process, and relates to the technical field of preparation of battery raw materials, and the process is characterized in that a flexible particle material for a battery is prepared in a compact space by adopting a pulsating stress dynamic processing method on the basis of an existing chemical formula. Performance obtained by a material formula and performance obtained by pulsating stress dynamic processing are mutually complemented to form an organic whole, the reaction device comprises a barrel, a feeding port is formed in the top of the barrel, a discharging port is formed in the bottom of the barrel, and a kneading and turning mixing mechanism is arranged, rotation of a stirring shaft is used as driving force of a sliding block, so that the material formula and the pulsating stress dynamic processing are combined, and the material formula and the pulsating stress dynamic processing are combined. The sliding block slides in the fixed sleeve in a reciprocating mode, upward and downward pressure is provided for materials in the barrel, the triangular fins are arranged on the baffles in a matched mode, the tips of the triangular fins can provide better shearing force for material particles rotating moderately, the materials are continuously kneaded and turned over and tend to be round, and carbon coating can be more uniform.

The invention relates to the technical field of cosmetics, and particularly discloses a preparation method of hydrophilic modified zinc oxide. The preparation method of the hydrophilic modified zinc oxide comprises the following steps: dissolving 0.1-5 parts by weight of a modifier in a solvent, uniformly mixing the solution containing the modifier with 20 parts by weight of zinc oxide powder, and drying at 100-150 DEG C to obtain hydrophilic zinc oxide; the modifier comprises polyglycerol. According to the preparation method of the hydrophilic modified zinc oxide, the problem of poor hydrophilicity of zinc oxide is solved, and the preparation method has the advantages of excellent hydrophilicity, simplicity, short time consumption and low cost.

The invention relates to a manufacturing method of a multilayer pre-plastic package structure of a fine-engraved metal lead frame. The manufacturing method comprises the following steps: step 1, designing a pattern of the metal lead frame; 2, preparing a plate before manufacturing the metal lead frame; 3, positioning holes are manufactured before the metal lead frame is manufactured; 4, engraving a pattern on the back surface of the metal lead frame plate; 5, processing burrs on the back surface of the metal lead frame plate; sixthly, plastic packaging is conducted on the back face of the metal lead frame plate; 7, engraving a pattern on the front surface of the metal lead frame plate; 8, processing burrs on the front surface of the metal lead frame plate; ninthly, conducting plastic packaging on the front face of the metal lead frame plate; 10, electroplating the surface layer of the metal lead frame; and 11, cleaning the surface layer of the metal lead frame, baking, drying and packaging. The production efficiency and the manufacturing precision are improved, and the production and manufacturing cost and the environmental pollution are reduced.

The invention relates to a method for manufacturing a pre-plastic package structure on the front and back surfaces of a fine-engraved metal lead frame. The method comprises the following steps: step 1, designing a pattern of the metal lead frame; 2, preparing a plate before manufacturing the metal lead frame; 3, positioning holes are manufactured before the metal lead frame is manufactured; 4, engraving a pattern on the back surface of the metal lead frame plate; 5, processing burrs on the back surface of the metal lead frame plate; step 6, engraving a pattern on the front surface of the metal lead frame plate; 7, processing burrs on the front surface of the metal lead frame plate; 8, cleaning the surface layer of the metal lead frame; step 9, pre-plastic packaging and molding of the metal lead frame; 10, baking and curing the metal lead frame after plastic packaging; 11, cleaning a plastic packaging material film on the surface layer of the metal lead frame; 12, electroplating the surface layer of the metal lead frame; and step 13, cleaning the surface layer of the metal lead frame, baking, drying and packaging. The production efficiency and the manufacturing precision are improved, and the production and manufacturing cost and the environmental pollution are reduced.

The invention discloses an impregnation liquid for an iron-based alloy magnetic powder core and an impregnation method based on the impregnation liquid. The impregnation liquid is prepared from the following components in percentage by mass: 5-15% of a metal organic compound, 5-20% of resin and 65-90% of an organic solvent. The impregnation method comprises the following steps that (1) iron-based alloy powder before insulation is put into impregnation liquid to be soaked, drying is conducted after soaking, and impregnated iron-based alloy powder is obtained; (2) carrying out insulation treatment on the iron-based alloy powder by using the nano silicon oxide dispersion liquid, and preparing an iron-based alloy magnetic powder core by using a powder metallurgy process after the insulation treatment, so as to obtain the iron-based alloy magnetic powder core; the obtained iron-based alloy magnetic powder core is cleaned and dried, and a to-be-impregnated iron-based alloy magnetic powder core is obtained; (3) completely immersing the iron-based alloy magnetic powder core into the impregnation liquid for soaking, and cleaning after soaking; and (4) heating and curing the cleaned iron-based alloy magnetic powder core, and naturally cooling to obtain the impregnated iron-based alloy magnetic powder core.

The invention provides slurry for electronic-grade glass fiber cloth, the slurry is an aqueous solution and comprises effective components and water, and the effective components are respectively a water-soluble polyester main film-forming agent, a polypropylene glycol auxiliary film-forming agent, a combustion improver, a lubricant, an antistatic agent and a defoaming agent; the mass percentage of each component in the total mass of the slurry is as follows: 2.0 to 35.0 percent of a water-soluble polyester main film-forming agent, 0.5 to 13.0 percent of a polypropylene glycol auxiliary film-forming agent, 0.1 to 3.0 percent of a combustion improver, 0.03 to 1.5 percent of a lubricant, 0.02 to 1.2 percent of an antistatic agent, 0.005 to 1.0 percent of a defoaming agent and 60.0 to 97.0 percent of water. The coating property and bundling property of the sizing agent in the glass fiber can be improved, the interface bonding degree of the sizing agent and the glass fiber is improved, warp-direction weaving defects of a cloth cover are reduced, and the weaving performance of the glass fiber is improved; the sizing agent has good desizing performance and low ash content, and the produced electronic cloth has the advantages of being low in air permeability, good in impregnation performance and the like.

The utility model relates to the field of mold film covering, and discloses an injection mold surface film covering device which comprises a machining table body, a fixing frame is fixedly installed in the middle of the top end of the machining table body, supporting plates are welded to the two side edges of the upper surface of the fixing frame correspondingly, and a first covering film is rotationally installed between the two supporting plates; limiting supports are rotatably installed in the middles of the two sides of the inner wall of the fixing frame, inner grooves are formed in the middles of the limiting supports, two-way lead screws are rotatably installed at the front and rear ends of the inner walls of the inner grooves, movable frames are symmetrically and movably installed at the front and rear ends of the outer surfaces of the two-way lead screws, and connecting rotating plates are symmetrically and rotatably installed on the side portions of one sides of the movable frames. According to the device, the injection mold rotates along the interior of the fixing frame, so that the effect of conveniently and uniformly coating the injection mold with a film at multiple angles is achieved, the overall coating effect of the injection mold is improved, the problem that the angle is relatively inconvenient to adjust when people coat the injection mold is solved, and the labor intensity of people is reduced.

The invention relates to the technical field of high polymer materials, and discloses a fluorine-containing fire extinguishing microcapsule and a preparation method thereof. A micro-suspension polymerization system is adopted, a reversible addition fragmentation chain transfer free radical polymerization technology is applied, and the fluorine-containing fire extinguishing microcapsule with a SiO2 / polymer composite shell layer wrapping a low-boiling-point fluoride core material is prepared. Reversible addition fragmentation chain transfer free radical polymerization adopted by the invention changes the dynamic characteristics of traditional free radical polymerization, a large number of low-molecular-weight oligomer chains are formed at the beginning of polymerization, the oligomer chains are easily diffused to an oil / water interface under thermodynamic driving, formation of a regular core-shell structure is promoted, and the uniformity of a shell chemical cross-linked network can be improved; therefore, the coating effect on the low-boiling-point fluoride core material is improved, toxic gases such as formaldehyde in the product can be avoided in the preparation process, and the preparation method has a wide application prospect.

The present invention relates to the field of cable processing technology, and specifically to a cable processing device that is convenient for cable core coating and molding, comprising a frame, an extruder and a wire feeding frame. The present invention cleans the dust on the surface of the cable core in advance to ensure the adhesion effect of the coating material and the surface of the cable core, uses a rotating frame to allow the coating material to be evenly coated on the surface of the cable core, thereby improving the coating effect on the cable core, and uses a cooling mechanism to cool and mold the coating material on the surface of the cable core, and then cleans the outer surface of the cable core coating layer after cooling to ensure the cleanliness of the outer surface of the cable core after coating, and avoids the cable core from being corroded from the inside after being installed in the insulating sleeve. Finally, the detection mechanism is used to detect the flatness of the cable core coating layer, and the protrusions and depressions of the coating layer are marked. For the coating section with poor flatness, the coating component is adjusted in time, thereby ensuring the coating molding quality of the cable core.

The invention relates to the technical field of building materials, and particularly discloses wet-mixed high-strength concrete and a preparation process thereof. Comprising the following steps: S1, taking hydroxylated basalt fibers, adding the hydroxylated basalt fibers into acetone, uniformly dispersing, adding glutaraldehyde, citrate B and hydroxyl silicone oil, stirring, filtering, washing and drying to obtain modified basalt fibers; s2, cement, gravel and sand are weighed and mixed, and a dry mixed material is obtained; sequentially adding a water reducing agent, deionized water, hollow glass beads, PVA fibers and modified basalt fibers into the dry-mixed material, and uniformly mixing to obtain wet-mixed high-strength concrete; the concrete is prepared from the following raw materials in parts by mass: 420 to 450 parts of cement, 1000 to 1150 parts of gravel, 500 to 600 parts of sand, 100 to 120 parts of hollow glass beads, 120 to 160 parts of water, 3 to 6 parts of a water reducing agent, 10 to 25 parts of PVA (Polyvinyl Alcohol) fibers and 20 to 40 parts of modified basalt fibers.

The invention provides a basalt fiber reinforced chlorinated polyvinyl chloride material and a preparation method thereof, and relates to the technical field of polymer composite materials. According to the invention, surface modified basalt fibers are added into chlorinated polyvinyl chloride, cycloheptane and a titanate coupling agent are used for carrying out surface treatment on the basalt fibers, the average length of the basalt fibers is 5-25 [mu] m, and the diameter of the basalt fibers is 0.5-1.5 [mu] m, so that the compatibility of the basalt fibers and polyvinyl chloride is improved, and uniform dispersion in the chlorinated polyvinyl chloride material is ensured; and therefore, the chlorinated polyvinyl chloride pipe has impact resistance, tensile yield stress, vicat softening temperature and hydrostatic performance, and the actual application requirements are comprehensively met.

The invention discloses a method for spray coating a lithium cobalt oxide positive electrode material and its application, comprising preparing an ether solution of organosilicon, adding a surfactant and a combustion aid to obtain a mixed solution, adding lithium cobalt oxide to the mixed solution to obtain a mixed material, adding the mixed material to a spray combustion device, the mixed material enters a combustion chamber through a carrier gas flow for combustion, and after the reaction is completed, solid materials are collected to obtain lithium cobalt oxide coated with silicon dioxide. The invention uses combustible organosilicon as a coating source, after evenly mixing ether with a lithium cobalt oxide positive electrode material, igniting in a spray combustion device, generating a silicon dioxide coating layer, coating the surface of the lithium cobalt oxide positive electrode material, further generating lithium silicate at high temperature, and reducing the alkalinity of the material surface.

The application provides a lithium-rich lithium-iron material, a preparation method and application thereof, and belongs to the technical field of lithium ion batteries. The lithium-rich lithium-iron material comprises a core and a coating layer coated on the surface of the core. The material of the core is lithium-rich lithium-iron doped with a first doping element, and the material of the coating layer is carbon material doped with a second doping element. The first doping element comprises at least one of Ti, W, Ni, Ce and Co, and the second doping element comprises at least one of B, N, S, O and P. The lithium-rich lithium-iron material is used as a lithium supplement in a battery, so that the capacity of the battery can be further improved and the gas production amount can be reduced.

The invention relates to a method for manufacturing a pre-plastic package structure on the back of a fine-engraved metal lead frame. The method comprises the following steps of: 1, designing a pattern of the metal lead frame; 2, preparing a plate before manufacturing the metal lead frame; 3, positioning holes are manufactured before the metal lead frame is manufactured; 4, engraving a pattern on the back surface of the metal lead frame plate; 5, processing burrs on the back surface of the metal lead frame plate; sixthly, plastic packaging is conducted on the back face of the metal lead frame plate; 7, baking and curing the metal lead frame plate; 8, cleaning a plastic packaging material film on the surface layer of the back surface of the metal lead frame; ninthly, engraving a pattern on the front surface of the metal lead frame plate; tenthly, burrs on the front face of the metal lead frame plate are treated; 11, electroplating the surface layer of the metal lead frame; and 12, cleaning the surface layer of the metal lead frame, baking, drying and packaging. The production efficiency and the manufacturing precision are improved, and the production and manufacturing cost and the environmental pollution are reduced.

The utility model is applicable to the technical field of shock absorbers, and provides a universal contact pin type inflating tool, which is used for inflating an oil cylinder and a piston rod and comprises a clamping tool, an inflating air chamber and an inflating pressure head, the inflating air chamber is mounted on the clamping tool, the inflating pressure head is pressed on the piston rod in a sleeving manner, and the inflating air chamber is a flexible inflating block; the flexible inflation block, the inflation pressure head, the oil cylinder and the piston rod are matched, clamped and sealed to form an inflation space, so that the inflation condition is met, and inflation operation of the piston rod and the oil cylinder is achieved. According to the universal contact pin type inflation tool, on one hand, the inflation efficiency and the inflation effect can be greatly improved, on the other hand, sealing inflation of piston rods and oil cylinders of different sizes can be effectively achieved through the action of the flexible inflation block, meanwhile, the piston rods of different diameters are pressed in a sleeving mode through the action of the inflation pressure head, and the inflation efficiency is greatly improved. Sealing and air inflation of the piston rod with the step and the oil cylinder can be achieved, and therefore the air inflation universality is effectively improved.

The utility model belongs to the field of cables, and provides a halogen-free low-smoke environment-friendly control cable for a coal mine, which comprises a plurality of cable cores, a heat insulation layer arranged outside the cable core in the center, a heat insulation strip arranged between the adjacent cable cores and connected with the heat insulation layer, and a shielding layer, an isolation sleeve, an armor layer, a cooling pipe and an outer sheath arranged outside all the cable cores in sequence, each heat insulation strip comprises a plate-shaped radial section, a cylindrical section is arranged at the telecentric end of each plate-shaped radial section, a filling layer is arranged between every two adjacent heat insulation strips, a first mica tape wrapping layer and a second mica tape wrapping layer are arranged between the filling layers and the shielding layer, and a thermoplastic thin-coating flame-retardant layer is arranged between the first mica tape wrapping layer and the second mica tape wrapping layer. The outer sheath is of a colored structure and comprises a plurality of colored layers which are concentrically distributed, and the colors of the adjacent colored layers are different. The cable is reasonable in design, simple in structure, good in heat insulation effect, high in wear resistance, beneficial to cost control and polling difficulty reduction, and suitable for large-scale popularization.

The invention discloses a resin grinding wheel and a manufacturing method thereof. The invention discloses a resin grinding wheel, which belongs to the technical field of grinding wheels and is prepared from the following raw materials in parts by mass: 55 to 75 parts of grinding material, 5 to 10 parts of phenolic resin powder, 20 to 35 parts of filler, 1 to 8 parts of impregnant, 0 to 0.3 part of enhancer A, 1 to 2 parts of enhancer B and 1 to 5 parts of wetting agent. The impregnant is formed by mixing 0.55 to 4.5 parts of ethylene glycol and 0.45 to 3.5 parts of a silane coupling agent. The impregnant can be completely spread and coated on the surfaces of grinding materials and powder materials or permeate into air holes, gullies and gaps of the materials, the surface state and surface chemical properties of the materials are changed, the impregnant and the phenolic resin powder are good in compatibility, part of the phenolic resin powder is dissolved by the impregnant when the impregnant and the phenolic resin powder are mixed, and the mechanical property of the materials is improved. The impregnant can introduce the resin component into the microscopic surface of the material, so that the coating performance of the resin and the material is enhanced.

The application relates to the technical field of pesticides, and particularly discloses a tetramethylpyrazine suspension agent with slow-release performance and a preparation method thereof. The tetramethylpyrazine is prepared into a suspension, so that the particle size of the tetramethylpyrazine can be controlled, and tetramethylpyrazine particles with a suitable particle size as a capsule core can be obtained without dissolving and emulsifying the tetramethylpyrazine technical material. The application overcomes the defect that the tetramethylpyrazine is difficult to adopt a traditional microcapsule coating process, and a capsule membrane formed by a melamine modified urea-formaldehyde resin prepolymer can hinder the degradation of the tetramethylpyrazine, thereby prolonging the persistence period of the tetramethylpyrazine suspension agent and improving the insecticidal effect of the tetramethylpyrazine pesticide.

According to the technical scheme, the stress relieving device comprises a relieving box and a relieving ring, supporting seats are installed at the positions, close to the front surface and the rear surface, of the bottom in the relieving box, sliding rods are installed at the tops in the supporting seats, springs are installed on the portions, located on the two sides of the supporting seats, of the outer surfaces of the sliding rods through spring seats, and the springs are connected with the relieving ring. An eliminating ring is installed at the tail end of the sliding rod, a driving motor is installed at the bottom in the eliminating box, a cam is installed at the end, located on the sliding rod, of an output shaft of the driving motor, overturning motors are installed at the two ends of the front surface of the eliminating ring, and overturning frames are installed on output shafts of the overturning motors. According to the stress relieving device in seamless pipe forming, the problems that an existing seamless steel pipe stress relieving mechanism cannot evenly beat a seamless steel pipe, the uniformity of generated vibration force is poor, and the stress relieving effect of the seamless steel pipe is affected are solved, the vibration uniformity of the seamless steel pipe is improved, and therefore the stress relieving effect of the seamless steel pipe is guaranteed.

The invention provides anti-oxidation coated SmFeN powder as well as a coating method and application thereof. The coating method comprises the steps of material taking, material adding, ball milling, material discharging and drying which are carried out in sequence, materials related to the material taking comprise SmFeN powder prepared by a reduction diffusion method, butylated hydroxytoluene and a zirconium coupling agent, and the SmFeN powder is prepared by the reduction diffusion method; the step of feeding comprises the step of adding SmFeN powder into a ball mill; the ball milling comprises the step of adding butylated hydroxytoluene and a zirconium coupling agent into a ball mill in batches, and the concentration of the butylated hydroxytoluene in the ball-milled material in each batch is less than or equal to 0.02 wt%. The coating method provided by the invention can be used for coating fine SmFeN powder, and on the premise of ensuring the performance of SmFeN, dangers in the production process are avoided, the preparation process is simplified, the production cost is reduced, and large-scale popularization and application are facilitated.

The application provides a capacitor core, a capacitor and a manufacturing method and an electronic product, and relates to the capacitor field. The capacitor core manufacturing method comprises the following steps: obtaining an anode body; generating a first cathode layer on the anode body to obtain a first intermediate piece; the first cathode layer is a poly (benzodifuran dione) layer; generating a second cathode layer on the first cathode layer of the first intermediate piece to obtain a second intermediate piece; the second cathode layer is a poly 3,4-ethylene dioxythiophene film layer; and manufacturing a capacitor core based on the second intermediate piece. The method helps to improve the performance of the capacitor core and the capacitor manufactured by the capacitor core.

The invention discloses a sodium vanadium fluorophosphate nanofiber positive electrode composite material as well as a preparation method and application thereof. The method comprises the following steps: adding a vanadium source and a reducing agent into deionized water according to a certain proportion, stirring, then adding a sodium source, a phosphorus source, a fluorine source and a solvent N, N-dimethylformamide, and continuously stirring to obtain a solution A; adding polyacrylonitrile into a solvent N, N-dimethylformamide, and stirring to obtain a solution B; mixing and stirring the solution A and the solution B to obtain an electrostatic spinning solution, and then performing electrostatic spinning to obtain a nanofiber positive electrode material precursor; and sintering the precursor in a tubular furnace to obtain the sodium vanadium fluorophosphate nanofiber positive electrode composite material. The sodium vanadium fluorophosphate nanofiber positive electrode composite material obtained by the invention has high specific surface area and high conductivity, is beneficial to rapid conduction of electrons and ions, and improves the overall cycle efficiency and power density of the battery.