35results about How to "Particle refinement" patented technology

The invention discloses an anti-blocking self-passing type plastic molding device, which relates to the technical field of plastic product processing, and comprises a base station, a screw conveying component and a mold closing component, and a material pipe is fixedly mounted at a feeding hole in the upper part of the screw conveying component. In the working process of the injection molding machine, the driving motor drives the sliding barrel to rotate, through cooperation of the sliding column and the spiral groove, the pushing disc effectively pushes plastic materials in the material pipe, softening and blocking are avoided, meanwhile, the cutting knife is used for refining material particles, the pushing difficulty is reduced, and the production efficiency is improved; materials are screened through cooperation of screening holes and a blocking plate, large or unqualified materials are removed, it is ensured that the granularity of the raw materials is uniform, in the pushing process, a connecting rod and a sealing plate are matched, the interior of a material pipe is sealed after pushing is completed, the material pressure at the screening holes is increased through the double effects of sealing and extruding, and material circulation is promoted; the screening stability and the production quality are improved, and the finished product quality of plastic products is guaranteed.

The invention relates to the technical field of nano material preparation, and provides a molybdenum powder preparation method and molybdenum powder.The molybdenum powder preparation method comprises the steps that original molybdenum trioxide is subjected to thermal shock treatment, and treated molybdenum trioxide is obtained; the defect of the treated molybdenum trioxide is higher than that of the original molybdenum trioxide; adding the treated molybdenum trioxide and a water-soluble carbon source into a solvent, and carrying out ultrasonic dispersion and ball milling treatment to obtain mixed slurry; dehydrating and drying the mixed slurry to obtain precursor powder of organic carbon coated molybdenum trioxide; performing inert atmosphere reduction treatment on the precursor powder to obtain molybdenum dioxide; carrying out gas reduction deoxidation treatment on the molybdenum dioxide to obtain molybdenum powder; and the particle size of the molybdenum powder is nanoscale. The method disclosed by the invention can be used for preparing the nano molybdenum powder with narrow particle size distribution.

The invention discloses an oxidized crosslinked asphalt coated resin hard carbon negative electrode material and a preparation method thereof. The preparation method comprises the following steps: S1, pre-treating resin to obtain a resin precursor; s2, performing mechanical pulverization, low-temperature pre-carbonization and airflow pulverization treatment on the resin precursor to obtain low-temperature pre-carbonized ground powder; s3, the low-temperature pre-carbonized ground powder is subjected to activation pore forming and high-temperature carbonization treatment, and resin hard carbon is obtained; s4, uniformly mixing the resin hard carbon and the asphalt to obtain a mixture; s5, performing asphalt melting coating and low-temperature oxidation cross-linking treatment on the mixture to obtain oxidation cross-linked asphalt coated resin hard carbon; s6, performing high-temperature carbonization treatment on the oxidized cross-linked asphalt coated resin hard carbon to obtain coated hard carbon; and S7, carrying out post-treatment on the coated hard carbon to obtain the oxidized crosslinked asphalt coated resin hard carbon negative electrode material. The oxidized cross-linked asphalt coated resin hard carbon negative electrode material has a relatively low specific surface area, and the first reversible capacity and the initial coulombic efficiency of a battery can be remarkably improved.

The invention discloses a method for regenerating a lithium iron phosphate positive electrode material by wet grinding, a positive electrode plate and a battery, and relates to the technical field of battery materials, the method comprises the following steps: pre-treating a waste lithium iron phosphate material to obtain a pre-treated lithium iron phosphate positive electrode plate; immersing the pretreated lithium iron phosphate positive plate in a deionized liquid to obtain stripped lithium iron phosphate; preparing a lithium supplementing solution, immersing the stripped lithium iron phosphate into the lithium supplementing solution to obtain a lithium supplementing mixed solution, and grinding the lithium supplementing mixed solution for a first preset time to obtain a reacted mixture; and separating a solid in the reacted mixture, and drying the solid to obtain the regenerated lithium iron phosphate material. According to the present invention, the positive electrode material of the waste lithium iron phosphate battery can be refined and homogenized, the reaction activity of the material is improved, and the lithium salt is configured in the grinding liquid phase so as to supplement the defective lithium element in the retired lithium iron phosphate, such that the electrochemical performance of the prepared regenerated lithium iron phosphate is improved.

The invention relates to an emulsifying and mixing device, in particular to an emulsifying device for preparing a defoaming agent. The technical problems that according to an existing emulsifying device, the shearing force of stirring equipment is inconvenient to adjust according to the state of raw materials, granular raw materials are prone to being accumulated on mixing blades, materials on the inner side wall of an emulsifying barrel are inconvenient to scrape off, and then the mixing and emulsifying effect is poor are solved. The emulsifying device for preparing the defoaming agent comprises a bottom frame, a fixing ring, an emulsifying barrel and the like, a fixing ring is mounted on the bottom frame, and an emulsifying barrel is mounted on the fixing ring. When raw materials are primarily mixed, the angles of the mixing blades are approximately parallel to the surfaces of the raw materials, so that the shearing force can be reduced, the raw materials can penetrate through the fixing holes, the area of the surfaces of the mixing blades directly impacted by the raw materials can be reduced, the shearing force is further reduced, and meanwhile, accumulation of the raw materials on the mixing blades is avoided; raw material deposition on the mixing blades is reduced, and uneven stirring caused by the fact that granular raw materials are attached to the mixing blades is avoided.

The invention relates to the technical field of soft magnetic ferrite materials, and particularly discloses a NiCuZn-MgO composite material and a preparation method thereof. The NiCuZn-MgO composite material comprises main components and additives, and the main components comprise the following components in percentage by weight: 36-72 wt% of Fe2O3, 13-16 wt% of ZnO, 6-9 wt% of NiO, 3-6 wt% of MgO and the balance of CuO; based on the total weight of the main components, the additive comprises the following components in percentage by weight: 0.5 to 1.5 weight percent of Bi2O3, 0.3 to 1.5 weight percent of SiO2 and 0.3 to 1.5 weight percent of CaO. According to the NiCuZn-MgO composite material prepared by the invention, the cost of soft magnetic ferrite can be reduced, and the NiCuZn-MgO composite material has high magnetic conductivity and high Bs.

The invention provides a preparation method of a B4C and Ti reinforced aluminum-based composite material, which comprises the following steps: firstly, mixing B4C powder and Ti powder, and carrying out high-energy pre-ball-milling by using a planetary ball mill to realize uniform mixing and particle refinement; and step-by-step mixing and ball milling are conducted on the reinforced powder and the Al powder, so that the reinforced phase is evenly distributed in the Al powder, namely the Al-based composite powder is obtained, and meanwhile the bonding tendency of the Al powder in the ball milling process is reduced. And the prepared composite powder is subjected to cold press molding, sintering and solid solution and aging, and the B4C and Ti synergistic reinforced aluminum-based composite material is prepared. The excellent physical and chemical properties of B4C and Ti are utilized, B4C and Ti are introduced into the aluminum-based composite material to improve the mechanical properties of the aluminum-based composite material and the weld quality of corresponding products, and the method has important significance on industrial application of the aluminum-based composite material and lightweight design of the products.

The invention provides a nanometer coating drying device, and relates to the technical field of coating drying, the nanometer coating drying device comprises a tower body and a vertical spiral conveyor, the lower part of the tower body is provided with a bottom plate, the vertical spiral conveyor comprises a material conveying pipe and a rotating shaft, a conical flow guide cover is arranged between the material conveying pipe and the bottom plate, and the upper part of the flow guide cover is connected with a separation cylinder; a blanking channel is reserved between the lower end of the separation cylinder and the flow guide cover; a spiral flow guide plate is arranged on the inner wall of the separation cylinder, and a disperser is mounted on the rotating shaft. The bottom feeding mode is adopted, so that intersection of to-be-dried nano paint entering the tower body and dried nano paint rising along with hot air can be reduced, collision and adhesion of the to-be-dried nano paint and the dried nano paint are reduced, hindering of the dried nano paint rising along with the hot air is reduced, the situation of excessive drying of the nano paint is reduced, and the drying efficiency of the nano paint is improved. And meanwhile, the to-be-dried nano-coating and the dried nano-coating can be isolated through the physical separation effect of the separation barrel, and the drying uniformity can be improved.

The invention discloses a preparation method of low-temperature sintered ceramic. The preparation method comprises the following steps: S1, pretreating kaolin; s2, modifying kaolin; s3, preparing a ceramic green body; s4, preparing a glaze material; and S5, preparing the low-temperature sintered ceramic. According to the low-temperature sintered ceramic provided by the invention, the kaolin is pretreated and modified, and the special grinding aid is added in the preparation process of the ceramic green body, so that the sintering temperature of the ceramic is effectively reduced, the sintering process is optimized, low-temperature sintering of the ceramic is realized, the energy consumption is reduced, and the production efficiency is also improved; the method has remarkable economic benefits and environmental protection significance, and the prepared ceramic has good mechanical properties.

The invention provides a high-strength particle reinforced aluminum-lithium-based alloy as well as a preparation process and application thereof. The alloy comprises the following components in percentage by mass: 3.3 to 4.5 percent of Cu, 0.2 to 0.7 percent of Mg, 0.8 to 1.6 percent of Li, 0.2 to 0.8 percent of Ag, 0.2 to 0.6 percent of Mn, 0.01 to 0.2 percent of Zr, 0.2 to 0.6 percent of Zn, 0.1 to 0.8 percent of TiB2 and the balance of Al and inevitable impurity elements. The mass content of Ti is smaller than or equal to 0.15%, the mass content of Si is smaller than or equal to 0.1%, and the mass content of Fe is smaller than or equal The preparation of the aluminum-lithium alloy is realized through a method of combining a mechanical stirring and ultrasonic stirring composite refining process, extrusion / rolling and heat treatment, and the problem of performance reduction caused by TiB2 particle aggregation of the particle-reinforced aluminum-lithium-based alloy is effectively solved, so that the strength of the particle-reinforced aluminum-lithium-based alloy is improved, and the application range of the particle-reinforced aluminum-lithium-based alloy is expanded.

The invention relates to a double half-Heusler alloy thermoelectric material with low lattice thermal conductivity and a preparation method thereof, the thermoelectric material is any one of a p-type thermoelectric material or an n-type thermoelectric material, the chemical formula of the p-type thermoelectric material is Sc0. 6V0. 5Co1-xNixSb, x is more than or equal to 0 and less than or equal to 0.12, and the n-type thermoelectric material is one of Sc0. 6V0. 5Co1-xNixSb. The chemical formula of the n-type thermoelectric material is Sc0. 5V0. 6Co1-yNiySb, wherein y is greater than or equal to 0 and less than or equal to 0.30. The preparation method comprises the following steps: mixing Sc, V, Co, Ni and Sb, grinding, sequentially carrying out sintering and vacuum packaging treatment to obtain a thermoelectric material wafer, and carrying out high-temperature annealing treatment on the thermoelectric material wafer to obtain the double half-Heusler alloy thermoelectric material with low lattice thermal conductivity. Compared with the prior art, the method has the advantages that the prepared double half-Heusler alloy thermoelectric material is replaced by the heterovalent elements, the Sc / V ratio is accurately regulated and controlled, p-type and n-type thermoelectric materials based on the same parent compound are successfully obtained, and the two materials both show promising thermoelectric performance.

The invention discloses a polishing method of an optical glass lens and cerium oxide polishing powder.The polishing method comprises the working procedure of preparing a cerium oxide polishing solution and the working procedure of polishing the optical glass lens through the cerium oxide polishing solution, and the cerium oxide polishing solution is formed by dispersing the cerium oxide polishing powder in a solvent; the method for preparing the cerium oxide polishing powder comprises the following steps: at 55-65 DEG C, continuously adding a carbonate precipitator into cerium chloride rare earth feed liquid, reacting until the pH value of a system reaches 6.0-6.5 to obtain rare earth carbonate slurry, purifying, adding polyethylene glycol with proper molecular weight, stirring and aging, heating to 90 DEG C or above, and preserving heat; after the heat preservation is finished, carrying out filter pressing, drying, calcining, carrying out water cooling, and carrying out ball milling; according to the method, the cerium oxide polishing solution prepared from the specific cerium oxide polishing powder is used for polishing the optical glass lens, so that the polishing quality is excellent, the polishing efficiency is high, the safety and the environmental protection property are better, and the polishing life is long.

The utility model discloses a concrete processing mixing device of centrifugal mixing, concretely relates to concrete processing technical field, including mixing barrel, the outside fixed setting of mixing barrel has the frame, the top of mixing barrel is through the setting of a plurality of material pipes, the inside setting of mixing barrel has centrifugal mechanism, and centrifugal mechanism includes the motor of fixed mounting at the top of mixing barrel, and the output fixed setting of motor has the pivot, and the surface fixed setting of pivot has the centrifuge cylinder, and the surface of centrifuge cylinder is set up a plurality of through -holes, and the surface fixed setting of pivot has a plurality of broken knives. The utility model realizes the preliminary centrifugal mixing, and broken knife can break up the big granular material, and the quality of mixing is promoted, and secondly can slide along the inner wall of mixing barrel under the centrifugal force and material movement effect, can effectively scrape off the barrel wall adhesion material, and also can mix the surrounding material, and further enhanced the uniformity and fullness of concrete mixing.

The invention relates to an efficient light and superfine powder mixing and stirring device and method.The efficient light and superfine powder mixing and stirring device is characterized in that a guide cylinder, a first stirring device and a second stirring device are arranged in a lower tank body of a mixing tank, an outer shaft and an inner shaft located in the outer shaft are vertically and rotationally installed on the guide cylinder, and the outer shaft and the inner shaft penetrate through the bottom of the mixing tank; the first stirring device is fixedly connected with an inner shaft at the lower end of the guide cylinder, the second stirring device is fixedly connected with an outer shaft of the guide cylinder and installed at the lower end of the first stirring device, the first stirring device is driven by an outer shaft driving device to rotate and stir materials to move, and the second stirring device is driven by an inner shaft driving device to rotate and stir materials to move. The light superfine powder mixing device has the advantages that the mixing efficiency of light superfine powder materials is improved through the first stirring device, the second stirring device and the scraping device, the first stirring device can strongly suspend and stir the materials, the first stirring device, the second stirring device and the scraping plate are all driven by the variable frequency motor, the mixing time is shortened, and the mixing efficiency is improved.

The invention belongs to the technical field of clean hydrocarbon processing, and particularly relates to regenerated clean hydrocarbon processing equipment and a using method thereof.The regenerated clean hydrocarbon processing equipment comprises a main body and a discharging mechanism arranged on the main body and further comprises a mixing and homogenizing mechanism and a defoaming and sterilizing mechanism, the mixing and homogenizing mechanism is arranged on the main body, and the defoaming and sterilizing mechanism is arranged on the main body; the mixing and homogenizing mechanism comprises a through type driving assembly, a driven type stirring assembly and an ultrasonic generator, the through type driving assembly is arranged on the main body, the through type driving assembly is arranged in the main body, and the ultrasonic generator is arranged in the main body; according to the mixing and homogenizing mechanism provided by the invention, efficient stirring and mixing of hydrocarbon compound raw materials are realized, and the uniformity and consistency of the raw materials in the reaction process are ensured.

The invention provides a particle size refining method of a chicken essence seasoning. The particle size refining method comprises the following steps: step 1, performing primary crushing on raw materials; wherein the water content of the raw materials is 2-3%; step 2, sieving with an N-mesh sieve; when N is less than or equal to 80, executing the step 4; when N is greater than or equal to 100, executing the step 3; step 3, carrying out secondary crushing on the raw materials passing through the mesh sieve; and step 4, carrying out secondary crushing on the sieved raw materials by using a high-energy ball milling method. The method is carried out after the production process, and the particle size of the chicken essence is reduced to the micron level.

The utility model discloses a uniform material humidifying device based on high-speed rotating blades, which comprises a driving motor, an output shaft of the driving motor is fixedly connected with a rotating shaft, a plurality of tool aprons are fixedly mounted on the outer wall of the rotating shaft, and the tool aprons are arranged at equal intervals along the length direction of the rotating shaft. A plurality of rotary tillage blades are fixedly connected to the outer side walls of the tool aprons through bolts, the rotary tillage blades are annularly arranged around the tool aprons, a supporting plate is fixedly installed on the bottom face of the driving motor, a material uniformizing and humidifying bin is fixedly installed on the top face of the supporting plate and located on the outer side of the rotating shaft, and an opening is formed in the end, away from the driving motor, of the top face of the supporting plate; an observation hole is formed in one side of the top face of the material uniformizing and humidifying bin, an upper water conveying pipe penetrates through and is fixedly connected to the middle of the top face of the material uniformizing and humidifying bin, multiple sets of rotary tillage blades rotating at a high speed are adopted to replace material conveying components such as an auger and a conveying belt in a traditional humidifier, water and materials are fully mixed, and the problem that humidification is not uniform is solved.

The invention belongs to the technical field of additive manufacturing, and particularly relates to an additive manufacturing high-strength magnesium-based composite material and a preparation method thereof, and the additive manufacturing high-strength magnesium-based composite material comprises a matrix made of rare earth magnesium alloy composed of Mg and rare earth, and a reinforcement formed by mixing TiB2 with micron particle size and nano particle size. By adopting the method disclosed by the invention, the high-strength and high-plasticity magnesium-based composite material of which the room-temperature tensile strength is 250-455MPa and the percentage elongation after fracture is 1-10% can be obtained.

The invention relates to a preparation method of a magnesium-lithium alloy plate, in particular to a preparation method of a high-toughness magnesium-lithium alloy plate. The invention aims to solve the technical problems that the Mg2Si phase in the existing magnesium-lithium alloy has larger grain size and poorer formability, and the magnesium-lithium alloy plate prepared by the conventional rolling process is difficult to achieve high toughness. The Al-27Si eutectic alloy formed by spray deposition is added in the smelting process, and an Mg2Si phase with a small size is introduced, so that a fine grain structure and better formability can be obtained; according to the method, high-density dislocation is introduced through a rolling process of heating and then cooling, the microstructure of the magnesium-lithium alloy is adjusted, second-phase particles are refined, a large number of fine recrystallized grains are generated, and then the comprehensive mechanical property of the magnesium-lithium alloy is improved through high-temperature annealing; the tensile strength of the high-strength and high-toughness double-phase magnesium-lithium alloy plate prepared by the preparation method disclosed by the invention is 280-305 MPa, and the ductility is 8-16%.

This invention discloses a method for preparing a high-strength, high-thermal-conductivity Mg-Zn-Cu-Mn magnesium alloy, belonging to the field of magnesium alloy preparation technology. Metal raw materials are prepared according to the atomic percentage ratio of each constituent element in the Mg-3Zn-3Cu-xMn alloy (0≤x≤1). Then, alloy melting, homogenization treatment, and hot extrusion deformation are performed sequentially. The extrusion temperature is 260-270℃, and the extrusion speed is 0.3-0.6 mm / s. This invention achieves homogeneous dispersion of Mn to cluster precipitation in the Mg-Zn-Cu magnesium alloy through Mn alloying modification treatment. When 0.6 wt.% Mn is added, the alloy exhibits the best thermal conductivity and tensile strength. This invention refines the grain size of the Mg-Zn-Cu-Mn magnesium alloy and eliminates some casting defects, thereby further improving the alloy's strength and thermal conductivity.

The present invention relates to a degradable medical magnesium alloy and a preparation method thereof, wherein the magnesium alloy comprises 1.0-2.5wt% zinc, 0.05-0.30wt% manganese, 0.05-0.40wt% carbon or zirconium, and unavoidable impurity elements, and the remaining components are magnesium. The preparation method of the magnesium alloy comprises the following steps: (1) smelting magnesium (2) adding carbon or zirconium (magnesium-zirconium alloy or zirconium chloride) (3) primary purification (4) adding zinc and manganese (5) filtering and cleaning (6) precipitation and standing (7) casting (8) melt heat treatment (9) machining. The carbon in the magnesium alloy component of the present invention is one of the essential elements for the human body, and its density is close to that of pure magnesium. Adding carbon to the magnesium alloy can play a role in refining the grains, thereby enhancing the mechanical strength and ductility of the magnesium alloy. Zirconium can also replace carbon. The present invention can prepare a magnesium alloy block material with an average grain diameter of less than 4μm, and has the mechanical strength and corrosion resistance required for degradable medical magnesium alloys, laying a material science foundation for fine and absorbable magnesium alloy medical devices.

The invention discloses bamboo wood crushing equipment suitable for edible mushroom cultivation granularity requirements, and relates to the technical field of bamboo wood crushing equipment. By means of the multi-stage smashing system, the chopping problem caused by a bamboo wood hollow structure can be effectively solved. Different from a traditional disc type chopping machine and a traditional drum type chopping machine, the equipment provided by the invention adopts a combined design of a fine tooth roller and a compaction roller, so that the bamboo green is fully compacted before entering the crushing process, the separation of the bamboo green and the bamboo yellow is avoided, and the bamboo green and the bamboo yellow can be uniformly cut to the required small particle size standard in the crushing process; and spiny bamboo green is reduced. According to the improvement, the problems of bag breaking and the like caused by spiny bamboo green are reduced, the loss caused by mushroom stick pollution caused by spiny bamboo green bags in the edible mushrooms cultivated by bamboo instead of wood is reduced, meanwhile, the uniformity of the substrate is improved, and a more ideal environment is provided for healthy growth of edible mushroom hyphae. Therefore, support is provided for demonstration and popularization of the cultivation technology of replacing wood with bamboo for edible mushrooms.

The present invention relates to an ink mixing device of a printing press, comprising a machine table and a reciprocating assembly on the top. Four vertical guide rods support the top plate and the frame plate of the upper and lower layers, and the top plate is connected to the frame plate through a first electric cylinder to control its lifting. The first cylinder and the second cylinder are arranged horizontally on the frame plate, and the second cylinder pushes the vertical square reciprocating plate to achieve forward and backward lifting, and the printing assembly and the ink mixing assembly are installed on the reciprocating plate. The printing assembly consists of a stabilizing plate on the top of the third cylinder, a bridging fork frame and a brush knife, and a concave screen and a brush plate are arranged in front of the frame plate. The ink mixing assembly includes a base installed on the stabilizing plate, an inverted motor, a mixing seat, a crushing knife, a spoiler and a material box, and is equipped with a flow valve and a drainage hood to guide the ink to the screen printing; it can effectively solve various problems encountered in the mixing process of traditional printing inks, especially for the mixing treatment of inks with different viscosities and multi-component inks.

The invention discloses an IP (Internet Protocol) live broadcast middle station system for realizing television set top box terminal control, which comprises an IP live broadcast middle station module, and the IP live broadcast middle station module comprises a UI (User Interface) template configuration unit, a unicast and multicast control unit and a channel configuration and single channel control and message notification module, the message notification module comprises a message pushing unit, a service recommendation unit, a payment channel and a player SDK module, and the player SDK module comprises a playing unit, a code rate switching unit, a speed-multiplying playing unit, a video preview thumbnail unit, an advertisement insertion unit, a playing data reporting unit, an operation and maintenance testing unit and a message SDK module. The message SDK module comprises a message display unit and a message control unit, and the AAA SDK module comprises a service access unit and a quick payment unit, so that the content transmission efficiency and stability are greatly improved, the safe broadcasting of the broadcast and television IP live broadcast platform is effectively guaranteed, and powerful support is provided for broadcast and television all-IP services.

This invention relates to a vacancy-controlled manganese selenide-molybdenum selenide-sulfurite heterojunction catalyst, its preparation method, and its applications. The invention first prepares nanoparticle-sized MnSe, then reacts the MnSe with sodium molybdate, Se powder, and other raw materials via a hydrothermal reaction to obtain the manganese selenide-molybdenum selenide-sulfurite heterojunction catalyst. Further, Mn vacancies are introduced according to different performance requirements. Vacancy-introducing agents include ethylenediaminetetraacetic acid, citric acid, iminodiacetic acid, aminotriacetic acid, sodium ethylenediaminetetramethylene phosphate, and hexametaphosphate, ultimately yielding the vacancy-controlled manganese selenide-molybdenum selenide-sulfurite heterojunction catalyst. The vacancy-controlled manganese selenide-molybdenum selenide-sulfurite heterojunction catalyst exhibits significantly enhanced photoelectrochemical and electrocatalytic performance; its photocurrent density is 5.2 times that of single-electrochemical MoSSe, and the electrocatalytic hydrogen evolution overpotential is reduced to 197 mV compared to MoSSe's 476 mV. The method of this invention is simple, easy to control, and has high production efficiency.

The utility model provides a welding device and assembling equipment, and the welding device comprises a camera mechanism which is used for monitoring a welding seam; the welding mechanism is configured to be used for welding a welding seam of the to-be-welded part; and the vibration mechanism is provided with a vibration end, the vibration end is arranged on one side of the to-be-welded part, the vibration end and the laser beam of the welding mechanism are distributed at a preset angle, and the vibration end is configured to be used for vibrating the weld joint. A to-be-welded part is placed at a designated position and clamped through a corresponding jig, if the welding condition is met, a welding seam gap defect-free signal is sent out, the vibration end of the vibration mechanism is aligned with a plate on one side of a welding seam and tightly attached to the to-be-welded part, the welding mechanism sends out a laser beam for welding, the vibration end vibrates the to-be-welded part, and the welding seam gap defect-free signal is sent out. The air holes in the welding seam can escape in time, flowing filling is conducted on the welding blast holes, the welding strength is improved, stress concentration near the air holes in the welding seam and the tendency of cracks caused in the using process of a to-be-welded part are avoided, and the purpose of optimizing the welding seam quality is achieved.

The invention discloses an Mg3Sb2-based semiconductor material for energy conversion and a preparation method thereof, and belongs to the technical field of energy conversion, and the molecular formula of the Mg3Sb2-based semiconductor material is Mg < 3.2 > Bi < 1.3 > Sb < 0.7 >. Mg < 3.2 > Bi < 1.3 > Sb < 0.7 > can generate n-p conduction transformation; when the K is less than 500 K, Mg < 3.2 > Bi < 1.3 > Sb < 0.7 > is an n-type semiconductor; when the voltage is greater than 500 K, Mg < 3.2 > Bi < 1.3 > Sb < 0.7 > is a p-type semiconductor. The preparation method comprises the following steps: uniformly mixing magnesium powder, bismuth powder and antimony powder according to a molar ratio of 3.2: 1.3: 0.7, sealing in a pure argon environment, and carrying out alloying, cold pressing and sintering to obtain the Mg3.2 Bi1. 3Sb0.7. When Bi is doped into the Sb position, the Mg vacancy concentration in the material can be effectively reduced, and the electron concentration can be improved at the same time. The doping not only enables the energy band gap of the material to be narrowed and converted into a narrow-band-gap semiconductor, but also improves the carrier concentration of the material. Under the combined action of the two factors, the electron concentration in the material is remarkably enhanced, and then conversion from an n-type conduction type to a p-type conduction type can be achieved. Therefore, the material has huge application potential in the technical field of energy conversion.

The invention relates to the field of preparation of friction materials for cue heads in billiard sports, in particular to a modified water glass adhesive, friction-resistant chalk and a preparation method of the friction-resistant chalk. The polyvinyl alcohol and the derivative thereof are introduced into the sodium water glass, so that the moisture absorption resistance of the sodium water glass is enhanced, the internal friction effect in the extrusion process is effectively reduced, the flowability of powder is improved, the powder is prevented from being blocked, and extrusion molding of the chalk is facilitated; by introducing the lithium salt, the bonding strength is reduced, and the powder falling problem of the chalk powder is improved; by adding the sodium water glass, the lithium salt, the polyvinyl alcohol and the derivative thereof, the silica sol has good film forming continuity and stability.

The invention relates to the field of pesticides, in particular to a diflufenican and pyroxasulfone pesticide suspending agent and a preparation method thereof. The diflufenican and pyroxasulfone pesticide suspending agent provided by the invention is prepared from the following raw materials in parts by mass: 7 to 10 parts of pyroxasulfone active compound, 10 to 15 parts of diflufenican active compound, 1 to 3 parts of wetting dispersant, 5 to 10 parts of dispersant, 1 to 3 parts of suspension thixotropic agent, 5 to 10 parts of antifreezing agent, 0.1 to 0.3 part of preservative, 0.1 to 0.3 part of thickening agent, 0.1 to 0.3 part of pH regulator, 0.1 to 0.3 part of defoaming agent and 60 to 80 parts of water. Through the synergistic effect of the auxiliary agents, the storage and application stability of the preparation is guaranteed, it is also guaranteed that the effective components are evenly distributed and efficiently absorbed by weeds, the green agriculture requirement is met, and the high practical and popularization price is achieved.

The utility model relates to cable processing equipment technical field, the utility model provides a kind of extruding machine for cable with automatic feeding, including cable extruding machine body, the feeding bin is communicated and is arranged on cable extruding machine body, second grinding wheel is provided inside the feeding bin, the side of second grinding wheel is symmetrically provided with first grinding wheel;First grinding wheel is fixedly connected with first worm wheel by crossing feeding bin, second grinding wheel is fixedly connected with second worm wheel by crossing feeding bin;Motor drives worm body rotation, utilizes the worm screw of symmetric reverse setting and drives worm wheel, makes first grinding wheel and second grinding wheel rotate towards each other, can sufficiently crush and break the caked raw material of entering the feeding bin, ensure that the raw material that enters extruding machine body is in dispersed state, avoid the problem that plasticization is not sufficient due to raw material caking, ensure that extruding operation is carried out smoothly.