21results about How to "Diffusion barrier" patented technology

The utility model discloses a multifunctional cigar portable box relates to tobacco appliance technical field. The portable box includes cigar box main part, explosion -proof lighter, cut -out spare, storage warehouse and heat -insulating layer. The cigar box main part is equipped with fireproof layer and support frame in, and fireproof layer adopts ceramic fiber composite material, and effective barrier flame diffusion, sets up dry powder storage warehouse and safety support spring below explosion -proof lighter, can release fire extinguishing agent automatically when deflagration, and the cut -out spare realizes linear cutting through replaceable blade and guide rail, and is equipped with spacing adjustment function, ensures accurate operation, and the storage warehouse is covered with aerogel heat -insulating layer, and maintains the constant temperature environment in the box. The utility model discloses through integration storage, ignition, cutting and safety protection function, solved traditional cigar box single -function, inconvenient to carry and the hidden danger of safety problem, has modularization design, double safety protection and easily maintains the upgrading and so on, is applicable to cigar lover daily use and outdoor scene.

The application provides a TOPCon cell and a preparation method thereof and a photovoltaic system, and relates to the field of solar cells. The TOPCon cell comprises a P-type silicon-based substrate and an N+ layer. The surface of the P-type silicon-based substrate extends in a direction away from the P-type silicon-based substrate and comprises, in sequence from the P-type silicon-based substrate, an N+ emitter layer, a silicon oxide layer, a first aluminum oxide layer, and a second aluminum oxide layer. The first aluminum oxide layer comprises a boron-doped aluminum oxide layer, and the second aluminum oxide layer comprises a phosphorus-doped aluminum oxide layer. The TOPCon cell adopts a double-layer gradient-doped aluminum oxide structure. The first aluminum oxide layer close to the P-type silicon-based substrate is a nanocrystalline aluminum oxide doped with boron, the B-O bond is used to enhance the interface chemical passivation, and the density of silicon dangling bonds is reduced. The second aluminum oxide layer close to the N+ emitter layer is an amorphous aluminum oxide doped with phosphorus. The phosphorus doping concentration gradient decreases, the electric field distribution can be controlled by P doping, and the hole recombination is inhibited.

The utility model relates to the technical field of mobile toilets, in particular to a non-drainage type mobile toilet which comprises a toilet body and a defecation cavity formed in the front face of the toilet body, a toilet door is rotatably installed at the position of a cavity opening of the defecation cavity, a collecting cavity is formed in the back face of the toilet body, and the non-drainage type mobile toilet further comprises a collecting box detachably installed in the collecting cavity, the top of the squatting pan is designed to be open, the squatting pan is fixedly installed at the bottom of the defecation cavity, the top of the squatting pan penetrates through the bottom and is provided with a defecation cavity communicated with the collection cavity, automatic opening and closing are achieved, the squatting pan conforms to the defecation habit, and when a user naturally steps on the pedal, the sealing baffle is automatically opened; after defecation is finished, the feet leave the pedal, the baffle is automatically closed under the action of the spring, manual operation is not needed, human body behavior habits are met, when the baffle is closed, the defecation opening is completely covered, peculiar smell diffusion is effectively blocked, a pure mechanical gear and rack transmission structure is adopted, electric power or a sensor is not needed, the fault rate is reduced, and the device is suitable for the environment without power supply.

This invention relates to the field of polysiloxane thermal insulation materials, and discloses a thermal insulation decorative coating for building exterior walls and its preparation method, comprising the following preparation steps: sanding the building exterior wall substrate with sandpaper and blowing away surface dust with compressed air to obtain a pretreated building exterior wall substrate; spraying the thermal insulation decorative coating onto the surface of the pretreated building exterior wall substrate and curing it to obtain the thermal insulation decorative coating. The thermal insulation decorative coating is formed by mixing amino-functionalized polysiloxane emulsion, acrylic emulsion, defoamer, preservative, hydroxyethyl cellulose, dodecyl alcohol ester, ethylene glycol, composite hollow ceramic microspheres, and water. The thermal insulation decorative coating is then sprayed onto the building exterior wall substrate to form a thermal insulation decorative coating, which exhibits high thermal insulation performance. Furthermore, the composite hollow ceramic microspheres are uniformly distributed within the thermal insulation decorative coating, and are not easily broken under external force.

This invention relates to the field of plasma spraying, and more particularly to a method and apparatus for localized precision spraying in plasma spraying. The technical solution is as follows: For forming a coating on a target area of ​​a workpiece, it includes the following steps: Step 1: Enclosing and positioning. Based on the shape and size of the area to be sprayed on the workpiece, a surrounding ring with a matching inner diameter is selected. The surrounding ring is installed on a fixed ring, and the surrounding layer of the surrounding ring is tightly fitted to the workpiece surface so that the spraying space only covers the target area. This invention, through replaceable surrounding rings, can customize the enclosing of local areas of workpieces of different sizes and shapes, ensuring that the spraying operation only acts on the target area, avoiding waste of coating material and contamination of non-target areas of the substrate, achieving localized precision spraying. The heat-resistant ceramic surrounding layer and the ceramic ring form a thermal barrier during the spraying process.

The invention discloses a heat-conducting and hydrophobic modified phosphorus-nitrogen halogen-free flame retardant chitosan aerogel as well as a preparation method and application thereof, and belongs to the technical field of aerogel preparation. The invention provides a preparation method of heat-conducting, hydrophobic and flame-retardant chitosan aerogel, which comprises the following steps: by taking biomass chitosan as a matrix, carrying out hydrophobic modification through tetraethoxysilane and methyltrimethoxysilane, and introducing an autonomously synthesized phytic acid-dicyandiamide flame retardant and an MXene high-heat-conductivity filler to form a mixed solution; and freezing in a refrigerator and freeze-drying in vacuum to obtain the multifunctional aerogel with a three-dimensional porous structure. The aerogel has remarkable advantages in the aspects of reducing the dosage of the flame retardant and reducing the thermal conductivity, and has the characteristics of hydrophobicity, flame retardance, thermal conductivity and reproducibility.

This application relates to the technical field of Ru porcelain processing equipment, and discloses a Ru porcelain glazing device, including a glazing box. A ring-shaped air curtain machine is bolted to the side surface of the glazing box. An L-shaped back plate is welded to the back of the glazing box, and a lead screw is installed between the glazing box and the L-shaped back plate. A drive motor is installed at the end of the lead screw. A threaded sleeve is threaded onto the surface of the lead screw, and a glazing frame is welded to the side surface of the threaded sleeve. An air suction hood is welded to the front of the L-shaped back plate, and an air suction pipe is welded to the upper surface of the air suction hood. In this application, the ring-shaped air curtain machine forms an air curtain barrier at the opening of the glazing box, blocking the diffusion of harmful gases. The air suction pipe is connected to an external air purification device via an external flange, thereby using the external air purification device to extract and purify the air under the air suction hood. The combination of these two methods can reduce the concentration of harmful gases in the workshop and reduce the risk of respiratory exposure for workers.

This invention provides a purging device and semiconductor deposition equipment, overcoming the shortcomings of uneven purging and inability to form a complete gas curtain in the transport channel of existing MOCVD equipment. The device sets the first and second purging channels at specific angles, so that the two airflows converge in the chamber in front of the valve plate and are located inside the chamber, thereby forming a fully enclosed protective gas curtain from top to bottom without dead angles. This effectively blocks the diffusion of reactive gases to the valve plate side, improves the dustproof and heat protection effect of the valve plate, and enhances the operational stability and safety of the equipment.

The invention discloses a micro-alloying rapid extrusion flame-retardant magnesium alloy and a preparation method thereof, and belongs to the technical field of metal materials. The microalloying fast extrusion flame-retardant magnesium alloy is prepared from the following components in percentage by mass: 1.0 to 1.8 percent of aluminum, 0.3 to 0.4 percent of calcium, 0.4 to 0.6 percent of manganese, 0 to 0.08 percent of nano particles, less than or equal to 0.02 percent of inevitable impurities and the balance of magnesium. Calcium is preferentially oxidized at high temperature to form a compact CaO layer to block oxygen, so that the ignition point of the alloy is obviously improved; a high-density nanophase is dynamically separated out from aluminum and manganese in the rapid extrusion process, the grain boundary is effectively pinned, grain coarsening is inhibited, and the stability of a microstructure below an oxidation film is enhanced; nanoparticles are combined with ultrasonic melt treatment to refine the structure, surface oxidation film microdefects are filled at the same time, and the self-repairing capacity and compactness are improved. According to the design, through microalloying design (the total element content is smaller than or equal to 2.8%), nanoparticle reinforcement and a rapid extrusion process are cooperated, collaborative optimization of low production cost, good flame retardant property and efficient extrusion capacity of the alloy is achieved, and the industrial prospect is wide.

The application discloses a composite material structure and a preparation method and application thereof, and relates to the technical field of automobiles.The composite material structure comprises a metal base plate and a fiber resin composite layer, the fiber resin composite layer is arranged on at least one side surface of the metal base plate, and the fiber resin composite layer comprises basalt fibers and a resin matrix.The application solves the technical problem that the existing automobile material is difficult to simultaneously consider mechanical bearing and fire resistance and heat insulation by combining the metal base plate and the basalt fiber composite layer.

The application discloses an erosion-resistant ceramic crucible containing magnesium oxide for smelting of aluminum-lithium alloy and a preparation method thereof, and belongs to the technical field of refractory materials. White corundum, cordierite, Cr2O3, BaF2, CaF2, ZrO2 and TiO2 are mixed to form premix; after the premix, mixed additives, water and grinding balls are mixed and ground, the mixed slurry is obtained through aging; the mixed slurry is poured into a gypsum mold to be dehydrated to obtain a green body, the green body is sequentially subjected to drying treatment and isostatic pressing treatment to obtain a pretreated green body; and the pretreated green body is sequentially subjected to vacuum sintering and plasma spraying to obtain the erosion-resistant ceramic crucible. The erosion-resistant ceramic crucible prepared by the application has good resistance to aluminum-lithium alloy erosion when smelting the aluminum-lithium alloy.

The utility model relates to the technical field of spraying, and particularly discloses a spraying protection device, which comprises a width-adjustable support frame, the bottom of the support frame is provided with universal wheels, the two sides of the support frame are provided with side protection plates, the back side of the support frame is provided with two back protection plates that are attached to the side walls and are in sliding cooperation, the upper side of the support frame is provided with two height-adjustable top plates, the two top plates are stacked and in sliding cooperation, the lower end of the top plate is connected with a vertical side support plate and a back support plate, the side support plate is in sliding cooperation with the side protection plate, and the back support plate is in sliding cooperation with the back protection plate; the utility model can be adapted to spraying workpieces of different sizes, has stronger versatility, is more flexible and convenient to use, significantly improves mobility, adjustment convenience and reusability, is especially suitable for construction scenes that need to frequently change work sites, is suitable for various spraying work scenes, and has remarkable practicality, economy and environmental protection.

The utility model discloses an assembly combined type PCB lamp panel, which relates to the technical field of PCB lamp panels, and comprises a lamp panel main body, the lamp panel main body comprises a central connecting plate and a plurality of groups of connecting plug boards which are symmetrically arranged on two sides of the central connecting plate and are distributed in a linear array, an assembling inserting groove used for being connected with the connecting inserting plates in an inserted mode when the lamp panel bodies are assembled is formed between every two adjacent connecting inserting plates, a plurality of lamp beads are evenly installed on the central connecting plate and the connecting inserting plates, and the adjacent lamp panel bodies are connected and assembled through assembling connecting pieces in the direction without the connecting inserting plates. A comb-shaped wiring layer corresponding to the connecting plug board is arranged on the back face of the lamp panel body and comprises a plurality of conducting circuits arranged in parallel. According to the utility model, the lamp panel main body is inserted and matched with the assembling slots through the connecting insertion plates, so that transverse expansion is realized; the adjacent lamp panel bodies are fixed through the splicing connecting pieces, the connecting inserting blocks are inserted into the connecting inserting holes of the lamp panel bodies, the connecting belts are embedded into the belt connecting grooves, and stable connection is formed.

The application relates to the field of special glass ceramics and surface modification coating, and discloses a high-stability glass ceramic fluorescent sheet and a preparation method thereof. The fluorescent sheet comprises a glass ceramic substrate and a sunlight control film layer which is combined on the excitation light incident side of the glass ceramic substrate; the glass ceramic substrate is composed of SiO2, Al2O3, Eu2O3, Tb4O7 and the like, and precipitates mixed crystal phases of feldspar and willemite; the sunlight control film layer is composed of Ag, TiO2, SnO2 and SiO2 which are alternately stacked; during preparation, the raw materials are melted and annealed, then nucleation and crystallization are carried out, and then the sunlight control film layer is magnetron sputtering deposited and surface modified. In the application, the inorganic crystal lattice anchoring light emitting center is used to replace the organic dye, photo fading is eliminated, the detection baseline is maintained stable, stray light is intercepted by the integrated film layer, excitation light leakage is eliminated, and the signal-to-noise ratio is improved.

This invention relates to the field of food sauce technology, and more particularly to a wasabi and mushroom sauce and its preparation method. The wasabi and mushroom sauce is prepared from the following raw materials in parts by weight: 80-120 parts wasabi granules, 5-20 parts wasabi oil granules, 150-300 parts diced mushrooms, 30-60 parts edible oil, 10-30 parts sweetener, 8-12 parts edible salt, 4-10 parts thickener, and an appropriate amount of water. This invention combines wasabi granules with highly stable wasabi oil granules. The wasabi oil granules are obtained by solidifying a Pickering emulsion stabilized with sodium octenyl succinate starch / microcrystalline cellulose and hydrogenated palm oil, exhibiting excellent protection and sustained-release effects against isothiocyanates, etc. The added diced mushrooms enrich the chewy texture. The wasabi and mushroom sauce maintains a high ITC content after storage, with a long-lasting flavor and rich taste, combining the aroma of real wasabi, the umami of mushrooms, and a full-bodied chewy texture.

The utility model relates to new energy automobile charging technical field discloses a charging device. The charging device, including shell, charging circuit board and heat management composite structure, charging circuit board and heat management composite structure all set up in the shell, heat management composite structure includes the heat conduction layer, phase change heat storage layer, heat insulation layer and the temperature equalizing layer that set up in turn, heat conduction layer and charging circuit board heat coupling, temperature equalizing layer and shell heat coupling. The charging device provided by the utility model can effectively manage the heat of charging device under the condition of natural heat dissipation, reduce the temperature of shell, eliminate local hot spot, improve charging efficiency and system reliability.

The application discloses a solar cell, a seed layer structure and a preparation method thereof and a photovoltaic module, and belongs to the photovoltaic technical field. The solar cell comprises a bottom silver-rich area, an intermediate transition area and a surface copper-rich area; the silver content of the bottom silver-rich area is greater than or equal to 75at%; the porosity of the bottom silver-rich area is less than or equal to 10%; the intermediate transition area comprises a silver-copper eutectic phase; the copper content of the surface copper-rich area is greater than or equal to 45at%; and the porosity of the surface copper-rich area is 20% to 50%. The seed layer can greatly reduce the silver content compared with a conventional pure silver seed layer, and can significantly reduce the material cost under the premise of ensuring the electrical performance; in addition, the seed layer structure has the transition structure of the bottom silver-rich area, the intermediate transition area and the surface copper-rich area, and is more conducive to improving the interface bonding strength, reducing the contact resistance and improving the photoelectric effect of the solar cell compared with the pure silver seed layer.

This invention discloses a high-temperature, high-strength molybdenum alloy with an in-situ self-healing antioxidant film and its preparation method, relating to the field of high-temperature alloy thermal protection technology. The antioxidant molybdenum alloy comprises a molybdenum alloy substrate and an antioxidant coating on its surface. During high-temperature oxidation, a layer composed of MoO3, Ta2O5, and RE is formed on the surface of the molybdenum alloy substrate. m TaO n The resulting dense oxide layer protects the substrate; the antioxidant coating has at least a two-layer structure, containing RE. m TaO n The phases (Mo,Ta)Si2 and (Mo,Ta)5Si3 have at least RE in their outer layers. m TaO n The molybdenum alloy contains a (Mo,Ta)Si2 phase and at least an (Mo,Ta)5Si3 phase in the inner layer. The preparation method involves mixing Mo, Ta, and rare earth elements in a specific ratio, pressing and sintering to obtain a molybdenum alloy ingot, and then subjecting the ingot to silicon infiltration with a silicon-infiltrating agent. This invention combines matrix alloying and surface modification to produce a molybdenum alloy with excellent high-temperature oxidation resistance, meeting the requirements for high-temperature applications up to 2000℃.

This invention relates to an antioxidant solder material and a welding process for surface-mount LEDs, belonging to the field of LED welding technology. It achieves homogenization of composition through a combination of step-by-step melting and microstructure control. First, a tin-copper-bismuth master alloy is prepared by pre-melting in a pit furnace, pre-dispersing the bismuth element. Then, vacuum induction melting combined with electromagnetic stirring, along with an intermediate alloy feeding method, promotes the uniform dispersion of high-melting-point / active elements such as nickel and rare earth elements. Ni and rare earth elements can play a role in grain refinement and grain boundary purification, effectively suppressing the gravitational segregation and coarsening of the bismuth phase, avoiding the formation of brittle enrichment zones in the solder joints. The resulting solder joints have uniform grains, a moderate thickness of the intermetallic compound layer, and a smooth morphology, significantly improving the shear strength and thermal fatigue resistance of the solder joints and reducing the risk of brittle fracture failure of micro-solder joints.

The invention discloses an interface-modified lithium manganate positive electrode material and a preparation method thereof, and belongs to the technical field of positive electrode materials. The interface modified lithium manganate positive electrode material comprises a LiMn2O4 inner core, a W and M doped lithium manganate first coating layer coating at least part of the surface of the inner core, and an M2WO6-zNz second coating layer coating at least part of the surface of the first coating layer. The two coating layers form a remarkable synergistic effect: S / Se doping of the second coating layer and M and W doping of the first coating layer are matched with each other, so that the overall structural stability of the coating layers is enhanced, cracking and falling of the coating layers in long-term circulation are effectively inhibited, and long-term protection of a lithium manganate matrix interface is guaranteed; meanwhile, lattice defects introduced by S / Se doping and lattice matching advantages of the first coating layer are coordinated and complemented, so that the migration kinetics rate of lithium ions is optimized, and the electronic conductivity and interface stability of the material are synchronously improved.

The utility model provides a double load board formula honeycomb paper tray accurate slitting device with automatic calibration function, including main body frame, slitting unit, calibration adjusting unit, environmental protection unit, unloading unit and control unit. The main body frame is double load board formula, and the material is automatically positioned by servo motor drive rope transmission system; the calibration adjusting unit calibrates the angle by the meshing of the third servo motor and the circular gear ring, and combines the dynamic correction of screw stepper motor module; the environmental protection unit combines the industrial dust collector and the negative pressure cutting seat to collect the chippings. Through the cooperative control of the transfer and adjustment mechanism, the material is automatically positioned and the angle is calibrated, the manual intervention is reduced, the operation time is shortened, and the slitting efficiency is improved; the correction mechanism guarantees the cutting precision, reduces the scrap rate, and improves the automation efficiency; the cutting seat hollow structure combines the negative pressure system, blocks the chippings diffusion, improves the blade opening cleanliness, prolongs the maintenance cycle; the unloading system automatically stacks the finished product, reduces the carrying damage.