210results about How to "High aspect ratio" patented technology

The invention relates to the technical field of nano ceramic materials, and discloses a high-strength nano aluminum oxide ceramic product and a preparation process thereof.The preparation process comprises the following preparation steps that aluminum oxide powder, a composite binder, composite gel, a plasticizer and a solvent are mixed and subjected to ball milling, and composite slurry is obtained; placing the composite slurry in a mold, and performing mold pressing and drying to obtain a green body; and putting the green body into a high-temperature sintering furnace, carrying out high-temperature sintering, and cooling to room temperature to obtain the nano aluminum oxide ceramic product. Nano zirconium oxide and nano magnesium oxide are formed on the surfaces of the pretreated silicon carbide whiskers, and can form a solid solution with nano aluminum oxide in the sintering process to serve as a bridge of the silicon carbide whiskers and nano aluminum oxide particles, so that the binding force of the silicon carbide whiskers in a nano aluminum oxide ceramic matrix is remarkably enhanced; phosphoric acid and aluminum ammonium sulfate are firmly combined on the surfaces of nanometer aluminum oxide particles through carboxymethyl cellulose, and the situation that phosphoric acid and aluminum ammonium sulfate are not firmly combined with the nanometer aluminum oxide particles is avoided.

The utility model provides a metal screen capable of improving the height-width ratio of printing paste, which is provided with at least two metal thin layers in a laminated manner, each metal thin layer is uniformly provided with a plurality of printing grooves, and the positions of the printing grooves of each metal thin layer correspond to each other. The opening area of the printing groove of the scraper face is larger than that of the printing groove of the printing face, and a first ink storage groove is formed in the outer edge of the metal thin layer printing groove in the scraper face. By means of the mode, the problems that in the printing process of an existing metal screen, slurry is prone to drying, so that fluidity is poor, the printing height-width ratio is low, inking is uneven, and virtual printing is prone to occurring are solved.

The embodiment of the invention provides a multi-layer stacked chip packaging method, which comprises the following steps of: forming a plurality of chips, and forming conductive bumps on the first surfaces of the chips; forming a first plastic package body wrapping the chip and forming a first interconnection layer on the exposed conductive bumps to form a first chip module; forming a redistribution layer, forming a first convex column on the redistribution layer, and forming a dielectric column on the first convex column; fixing a chip on the rewiring layer and forming a second plastic package body on the rewiring layer; removing the dielectric columns to form blind holes, and forming second convex columns on the first convex columns to form plastic package body conductive columns; forming a second interconnection layer on the surface, deviating from the rewiring layer, of the second plastic package body to form a second chip module; and sequentially stacking the plurality of second chip modules on the substrate, and stacking the first chip module to the second chip module on the uppermost layer. According to the method, the structure storage capacity is improved, and the alignment precision requirement is reduced; the surface uniformity of the first convex column is improved when the second convex column is formed, and the stability and the reliability of the conductive column of the plastic package body are improved.

The invention discloses a packaging bag with high sealing performance and a preparation process thereof, and belongs to the technical field of packaging materials, the packaging bag comprises the following raw materials: polylactic acid, polycaprolactone, a nano-silver filler composite antibacterial agent and an epoxy compatilizer; the nano-silver filler composite antibacterial agent is formed by depositing a hybrid modified coating on the surface of a nano two-dimensional filler and then loading nano-silver; the hybrid modified coating is prepared from polydopamine and hyperbranched polyethyleneimine. The polylactic acid and the polycaprolactone are used as main base materials, and the packaging bag is endowed with good mechanical properties by utilizing high mechanical strength of the polylactic acid and excellent flexibility of the polycaprolactone; a nano-silver filler composite antibacterial agent and an epoxy compatibilizer are also added, the nano-silver filler composite antibacterial agent takes a nano-two-dimensional filler as a raw material, the nano-two-dimensional filler has a high length-diameter ratio and can block permeation of gas molecules, and the dispersion performance is improved by combining the nano-two-dimensional filler with the epoxy compatibilizer; the barrier property and the mechanical property of the packaging bag are further improved.

The invention relates to a preparation method of a high-precision gel injection pressureless sintering silicon carbide ceramic water jet cutter sand pipe, which comprises the following steps: pouring premixed liquid into a mold, and curing to obtain a green body; the inner mold is taken out of the cured blank, then the outer mold and the blank are put into a polyethylene glycol solution to be dried, the blank shrinks when being dried in the polyethylene glycol solution, and demolding is completed; drying the demolded green body on drying equipment, and carrying out vacuum heating to obtain a dried green body; and carrying out pressureless sintering on the dried blank to obtain the silicon carbide ceramic water jet cutter sand pipe. The premixed liquid comprises a monomer, a cross-linking agent, a dispersing agent, a defoaming agent, modified silicon carbide powder, a sintering aid and tetramethylammonium hydroxide, and the modified silicon carbide powder comprises graphene composite silicon carbide and modified carbon nanotubes. The water jet cutter sand pipe has the effect of improving the product quality of the prepared water jet cutter sand pipe.

The invention belongs to the technical field of cables, and particularly relates to a high-voltage cable for a new energy vehicle, which comprises a conductor and an insulating layer, the insulating layer material is prepared from the following raw materials in parts by mass: 40 to 50 parts of polyethylene, 5 to 10 parts of beta-caryophyllene-maleic anhydride-polyethylene copolymer, 10 to 15 parts of ethylene-octene copolymer, 1 to 4 parts of composite cross-linking agent, 2 to 3 parts of cellulose nanofiber, 1 to 2 parts of kaurene, 5 to 10 parts of flame retardant, 0.5 to 1 part of flexibilizer and 0.5 to 1 part of lubricant. The prepared cable has excellent thermal stability, mechanical strength and insulating property, the service life of the cable is effectively prolonged, and the use stability of the cable is effectively improved.

The invention relates to the technical field of photovoltaic cells, and provides copper electrode slurry, a metal electrode, a preparation method of the metal electrode and a photovoltaic cell. The copper electrode slurry comprises a metal composition, a dispersion reducing agent, a composite curing agent and an optional solvent, the metal composition at least comprises copper powder and optional gold powder and / or silver powder; the composite curing agent comprises thermosetting resin and a latent curing agent; wherein the mass ratio of the metal composition to the composite curing agent is (7-30): 1. The copper electrode paste provided by the invention replaces expensive silver paste, so that the manufacturing cost of a solar cell energy electrode is greatly reduced. According to the method for preparing the metal electrode, the position of the copper electrode can be precisely machined, damage to the amorphous silicon layer is avoided, remelting and solidification of the copper electrode are achieved through multiple times of laser scanning, and the problem that the adhesive force between the copper electrode and the substrate is poor is effectively solved.

The invention discloses a calcium carbonate whisker material and a preparation method thereof, the preparation method comprises the following steps: mixing a calcium hydroxide suspension and a first crystal form control solution to obtain a mixed solution, heating, and introducing carbon dioxide to obtain a reaction system; and when the pH value of the reaction system reaches a first threshold value, supplementing the calcium hydroxide solution and the second crystal form control solution, keeping the introduction of the carbon dioxide, continuing the reaction until the pH value of the reaction system reaches a second threshold value, stopping the reaction, and collecting to obtain the calcium carbonate whisker material. The calcium hydroxide is supplemented in the later period of the carbonization reaction to prolong the progress of the carbonization reaction, and the second crystal form control solution is supplemented, so that the utilization of the magnesium ion solution and the yield of the calcium carbonate whiskers can be improved, and the aragonite phase whiskers can be promoted to continuously grow along the length direction; therefore, the calcium carbonate whisker with a higher length-diameter ratio is prepared.

The invention discloses a high-quality laser welding manufacturing device and a high-quality laser welding manufacturing method, which solve the problems of concentrated energy distribution, small inherent focal depth, insufficient depth-diameter ratio of welding and insufficient welding thickness of the existing ultrafast laser welding technology. The zoom collimation system, the cone mirror, the acousto-optic modulation unit and the long focal depth compression unit are sequentially arranged on a light path where the welding laser is located in the emergent direction of the welding laser. The zoom collimation system is used for changing the spot diameter of the welding laser and collimating the spot diameter; the cone mirror is used for shaping the welding laser subjected to diameter-variable collimation into long-focal-depth laser; the acousto-optic modulation unit divides the long-focal-depth laser into N sub-beams and adjusts the spatial position of each sub-beam, and N is a positive integer greater than or equal to 1; and the long focal depth compression unit is used for adjusting the spot diameter and focal depth length of each sub-beam, so that the focal position and energy of each sub-beam are suitable for laser welding.

The invention relates to low-temperature conductive silver copper paste and a preparation method and application thereof in the technical field of solar heterojunction cells. The low-temperature conductive silver copper paste comprises the following components in parts by weight: 1-96 parts of silver powder; 1-96 parts of silver coated copper powder; 0.1 to 5 parts of resin; 0.1-5 parts of a curing agent; 1-10 parts of an organic solvent; wherein the resin comprises epoxy resin and acrylic resin, and the mass ratio of the epoxy resin to the acrylic resin is 1: (0.1-1.6). According to the low-temperature conductive silver-copper paste provided by the invention, through reasonable matching of the resin, the surface wettability of powder particles can be effectively improved, the wettability of the paste is improved, the long-term printability is guaranteed, the printability is enhanced, meanwhile, the double-sided rate is excellent, the reliability is excellent, the aspect ratio is excellent, the photoelectric conversion efficiency is excellent, and the overall performance is excellent through production line verification. And meanwhile, the preparation method of the low-temperature conductive silver-copper paste is simple to operate, free of special requirements on equipment, easy to industrialize and wide in application prospect.

The invention relates to the technical field of epoxy resin, and discloses polytetrahydrofuran-nanocellulose toughened and reinforced epoxy resin, nanocellulose has a high length-diameter ratio and can play a stress transfer role in an epoxy resin matrix, and a polytetrahydrofuran molecular chain is introduced, so that the polarity of the nanocellulose is improved, and the toughness of the epoxy resin is improved. Compared with the prior art, the nano-crystalline cellulose has the same chain segment as carboxyl-terminated polytetrahydrofuran participating in curing, so that the nano-crystalline cellulose has better compatibility and can form good dispersity in a matrix, and an active carboxylic acid methyl ester group is introduced to a molecular chain of polytetrahydrofuran, so that the molecular chain of polytetrahydrofuran is introduced to the surface of the nano-crystalline cellulose, and the nano-crystalline cellulose is prepared. A polytetrahydrofuran molecular chain contains a flexible chain segment, so that the polytetrahydrofuran has a very good toughening effect, the rigidity of the epoxy resin is reduced, and the epoxy resin has more excellent mechanical properties under the synergistic toughening action of the nanocellulose and the polytetrahydrofuran.

The invention provides a crystalline silicon solar cell metal grid line preparation method, a crystalline silicon solar cell and a photovoltaic module, and relates to the technical field of crystalline silicon solar cells. The preparation method comprises the following steps: printing a plurality of first sub-grid lines arranged in rows or columns by using a knotless screen printing plate, and curing to obtain a first target battery piece; and overprinting a second sub-grid line on each first sub-grid line by adopting a full-opening steel plate, curing and sintering. The first sub-grid lines are printed by adopting a knotless screen printing plate, and then the second sub-grid lines are overprinted by adopting a full-opening steel plate, so that the height-width ratio of the metal grid lines can be improved; the second sub-grid line is overprinted by using the full-opening steel plate, so that the shaping of the metal grid line can be assisted, the surface flatness of the metal grid line is optimized, the broken grid is reduced, the contact resistance is reduced, the formation of high-quality ohmic contact is promoted, a better narrow-line-width design space can be obtained, and the consumption of silver is reduced while the shielding of a light absorption area is reduced; and the production cost of the battery is effectively reduced.

The invention discloses high-performance silver paste added with nano silver oxide and a preparation method of the high-performance silver paste. The high-performance silver paste comprises the following components: an organic carrier, glass powder, silver powder and an additive, the organic carrier comprises a volatile solvent and non-volatile resin; the non-volatile resin comprises ethyl cellulose, nitrocellulose, acrylic resin, polyamide wax resin and hydrogenated castor oil; the volatile solvent comprises texanol, diethylene glycol monobutyl ether, diethylene glycol monobutyl ether acetate, tributyl citrate, dimethyl oxalate and dimethyl silicone oil; the additive adopts nano silver oxide. The invention relates to the technical field of solar cells. Compared with silver powder, the nano silver oxide is smaller in particle size, large in specific surface area and low in tap density, the viscosity can be improved when the nano silver oxide is added into the paste, the height-width ratio of a printing grid line electrode can be improved, the shading area can be reduced, the current of a battery piece can be improved, and the photoelectric conversion efficiency of the battery piece can be improved.

The invention discloses a potassium-doped chain-shaped manganous-manganic oxide positive electrode material and a preparation method and application thereof, and belongs to the field of aqueous zinc ion batteries, and the preparation method comprises the following steps: preparing a mixed solution of isopropanol and deionized water; the preparation method comprises the following steps: under magnetic stirring, dissolving manganese acetate, potassium chloride and nitrilotriacetic acid into a mixed solution, and preparing K-Mn-NTA, namely a K-Mn-NCs precursor, through a hydrothermal method; then, K-Mn3O4-NCs is prepared through an annealing method; and finally, carrying out in-situ polymerization on polyaniline on the K-Mn3O4-NCs to obtain the K-Mn3O4-NCs coated PANI. When the positive electrode material is applied to the zinc ion battery, the cycle performance and the rate capability of the zinc ion battery can be improved, the conductivity of the positive electrode material is improved, the dissolution of Mn is inhibited, and the electrochemical performance of the zinc ion battery is improved.

The present application relates to the technical field of decorative panels, and specifically discloses a light green fireproof decorative panel and a preparation method thereof. A light green fireproof decorative panel, using polypropylene resin, polyvinyl chloride resin, caffeic acid modified reed straw fiber, shell powder and diatomaceous earth mixed filler modified with aluminum titanium composite coupling agent JTW‑1816 as main raw materials, using bean-based adhesive and MDI adhesive as binders to prepare a light green base material, using ultra-thin fiberboard as a decorative material, and using vinyl chloride copolymer emulsion, bean-based adhesive and MDI adhesive as finishing film materials, to jointly prepare a light green fireproof decorative panel with excellent performance. The light green fireproof decorative panel prepared in the present application has the advantages of being waterproof and moisture-proof, high wear resistance, high bonding strength, good impregnation and peeling performance, resistance to cold and heat cycles, pollution resistance, excellent flame retardant performance, safety and environmental protection.

The invention discloses a method for preparing high aspect ratio calcium carbonate whiskers by carbon fixation in steel smelting slag leachate, belonging to the technical field of solid waste resource utilization. The method comprises the following steps: leaching steel smelting slag to obtain calcium-magnesium leachate and leach slag; removing impurities from the calcium-magnesium leachate by a pH swing method to obtain a calcium-magnesium purified solution; capturing the gas containing carbon dioxide by an alkaline solution to obtain a carbonated solution; adjusting the pH of the calcium-magnesium purified solution to convert magnesium ions into magnesium hydroxide, placing the solution in an ultrasonic field, adding the carbonated solution to carry out a carbon fixation reaction, and washing and drying the precipitate obtained by the reaction to obtain calcium carbonate whiskers. The method not only successfully realizes the efficient resource utilization of two wastes, steel smelting slag and carbon dioxide flue gas, but also produces high value-added calcium carbonate whisker products while stably fixing carbon dioxide, and has broad application prospects and environmental value.

The invention discloses a preparation method of a self-supporting carbon nanofiber loaded high-spinning Fe monatomic catalyst and application of the self-supporting carbon nanofiber loaded high-spinning Fe monatomic catalyst in a flexible zinc air battery, and the self-supporting carbon nanofiber loaded high-spinning Fe monatomic catalyst (Fe-N4 / NGC-C) is prepared by using an electrostatic spinning technology in combination with a high-temperature pyrolysis strategy; the carbon nanofiber has the advantages of high length-width ratio, large specific surface area, strong stability and the like, can realize uniform distribution of metal Fe monatomic, and inhibits aggregation of electrocatalytic active sites in the carbonization process. According to the preparation method, the atom utilization rate and the conductivity can be improved, and low load and high catalytic performance are realized.

The invention discloses a crack pressure-bearing plugging agent and a preparation method thereof, and relates to the technical field of oil well operation plugging. The crack pressure-bearing plugging agent comprises the following raw materials in parts by weight: 4-25 parts of a bridging material, 3-11 parts of a filling material, 0.5-2 parts of a deformed tie bar material and drilling fluid. When the plugging agent is used, a bridge can be quickly formed and a plugging layer can be efficiently formed aiming at deep underground leakage, the plugging agent has the advantages of high strength, high pressure bearing capacity and high temperature resistance, deep, high-temperature and high-pressure stratum conditions can be effectively handled, a stable plugging layer is formed, leakage of a fractured stratum working solution is effectively controlled, and the plugging agent has a good application prospect. And the method can adapt to the characteristic of inducing dynamic change of crack width.

The invention provides a laser transfer printing film preparation method and a transfer printing film, and the method comprises the steps: providing a substrate which comprises a first surface and a second surface which are oppositely arranged; a plurality of grooves are formed in the direction, close to the second surface, of the first surface; an anti-reflection layer is prepared on the second surface, the anti-reflection layer is cured, and the second surface is covered with the anti-reflection layer; a hydrophobic and oleophobic layer is prepared on the first surface with the grooves, the hydrophobic and oleophobic layer is cured, and the first surface and the grooves are covered with the hydrophobic and oleophobic layer. On the basis of an existing laser transfer printing film structure, a transparent coating with hydrophobic and oleophobic characteristics is added to the front face, and slurry can be completely separated from a transfer printing template, so that silver slurry is saved, and the height-width ratio of a grid line is increased. In addition, an anti-reflection layer is additionally arranged on the back face, reflection loss generated when laser penetrates through the transfer printing film is reduced, enhancement of actual laser power is ensured, and then the use efficiency of the laser is improved.

The invention discloses a modified resin composition for a high-pressure-resistant and high-wear-resistant PVC (polyvinyl chloride) hose, and belongs to the technical field of PVC pipes. The sisal fibers are subjected to alkali treatment, impurities are removed and active sites are increased through insertion modification and alkali treatment of the magnesium aluminate spinel fibers, the magnesium aluminate spinel fibers improve the performance of the pipe due to the high length-diameter ratio and other characteristics of the magnesium aluminate spinel fibers, a stable enhanced network structure is formed in a PVC matrix, the surface hardness and wear resistance are improved, the pressure is shared, and the pressure resistance is improved. A bicyclo [2.2. 2] octane structure contained in the long-chain graft modifier disclosed by the invention has rigidity and steric hindrance effect, can uniformly disperse pressure to avoid breakage or excessive deformation of a molecular chain, and is coupled with an amino silane coupling agent to form a three-dimensional structure to improve pressure resistance and wear resistance. After sulfonic groups and a long-chain grafting modifier are introduced to the surfaces of the interspersed modified sisal fibers, the hydrophobic and oleophylic properties of the sisal fibers are improved, the compatibility with PVC is enhanced, agglomeration is avoided, friction is effectively resisted, and the processing fluidity of the material is improved.

The invention relates to a safe and environment-friendly rough-surface core winding pipe and a processing technology thereof. The safe and environment-friendly rough-surface core winding pipe comprises the following components in parts by mass: 160-200 parts of polyvinyl chloride, 90-100 parts of epoxy resin, 40-60 parts of chloroprene rubber, 30-40 parts of a chopped fiber compound, 10-16 parts of a dispersing agent and 8-12 parts of a toughening agent. The chopped fiber compound comprises a modified aramid fiber and carbon nanotube composite material. The method has the effects of improving the green and environment-friendly performance of the product and improving the mechanical strength of the product.

The invention relates to the technical field of photovoltaic cells, and provides a solar cell and a preparation method thereof, the solar cell comprises a silicon substrate and a transparent conductive film, the transparent conductive film is provided with a periodic nanostructure array, and the solar cell also comprises a metal electrode arranged on the surface of the transparent conductive film, the metal electrode is prepared by adopting copper electrode slurry and a laser process. The periodic nanostructure array modified layer is prepared on the conductive thin film, so that the surface area and the conductivity of the transparent conductive thin film can be increased, the absorption and reflection of the transparent conductive thin film to light are improved, and the efficiency of the solar cell is improved; and the binding force of the electrode can be increased, and the durability and the stability of the solar cell are improved. According to the preparation method of the solar cell provided by the invention, the position of the copper electrode can be precisely processed, the problem of precision of current silk-screen printing is solved, the damage to the amorphous silicon layer can be avoided, the prepared copper electrode has a relatively large height-width ratio, and the light conversion efficiency can be effectively improved.

The invention discloses a preparation method of in-situ esterified nano cellulose fibrils based on plant straws. Comprising the following steps: mixing deionized water, plant straw powder and a biological compound enzyme preparation, and carrying out enzymatic reaction on the mixed solution to obtain enzyme-pretreated plant straw powder; mixing a deep eutectic solvent with the enzyme-pretreated plant straw powder, and carrying out a dissociation-in-situ esterification reaction on the mixed solution to obtain in-situ esterified holocellulose; mixing deionized water, in-situ esterified holocellulose and an oxidizing agent, carrying out oxidation reaction on the mixed solution, and carrying out suction filtration on the reaction solution to obtain in-situ esterified cellulose; and carrying out mechanical treatment on the aqueous dispersion of the in-situ esterified cellulose to obtain the in-situ esterified nanocellulose fibrils. According to the present invention, the multi-dimensional co-treatment preparation technology integrating biological pretreatment, in-situ chemical modification and mechanical dissociation is adopted, such that the in-situ esterified cellulose fibril can be rapidly, efficiently and environmentally-friendly prepared, the prepared nano cellulose fibril has characteristics of high purity, uniform size and high stability, and the large-scale production can be achieved.

The invention relates to the technical field of photovoltaic cells, and provides a laser processing device, a method for preparing a metal electrode and a photovoltaic cell. According to the laser processing system, remelting and solidification are carried out while selective metallization is carried out, the internal stress of the electrode is released while the adhesive force is increased, and the porosity can be effectively reduced; in addition, the technological process can be simplified, the problem that the secondary machining position is difficult to calibrate is solved, and the machining efficiency is improved. According to the method for preparing the metal electrode, the position of the copper electrode can be precisely machined, the problem of precision of current silk-screen printing is solved, damage to the amorphous silicon layer can be avoided, the prepared copper electrode has the large height-width ratio, and the light conversion efficiency can be effectively improved.

The invention belongs to the technical field of synthesis and preparation of aluminum nitride, and discloses a controllable and extensible preparation method of a one-dimensional aluminum nitride nanowire / nanotube, which comprises the following steps: (1) uniformly mixing a solid aluminum source and a solid nitrogen source, transferring the mixture into a rotatable crucible, transferring the crucible into a tubular furnace, sealing the tubular furnace, and carrying out heat preservation for 2-3 hours; vacuumizing and then introducing protective gas; (2) under the condition that protective gas is continuously introduced, the tubular furnace is heated to a preset target temperature for a nitridation reaction, and the nitridation reaction is carried out under the condition that a crucible rotates at a constant rotating speed; and after the reaction is finished, cooling the tubular furnace and stopping the rotation of the crucible to obtain a one-dimensional aluminum nitride nanowire or nanotube product. According to the method, the solid aluminum source and the solid nitrogen source are used as raw materials, and the crucible rotation is introduced during the nitridation reaction to carry out dynamic enabling improvement, so that the single-crystal aluminum nitride nanowire or nanotube with high purity and uniform morphology can be efficiently synthesized.

The invention discloses an annular explosion propagation device for a compact explosion-formed bullet warhead, which is characterized in that the interior of an upper explosion propagation shell is concave upwards to form a circular inner cavity for assembling an explosion propagation grain, a lower explosion propagation shell is of a hollow columnar structure, and the upper explosion propagation shell is fixed at the upper end of the lower explosion propagation shell; the booster explosive ring is assembled in an inner cavity of the lower booster shell, and the explosion suppression body is assembled in an inner hole of the booster explosive ring; wherein the lower end face of the booster column is in contact with the upper end face of the booster ring; the booster explosive column is used for receiving detonation signals output by a fuze detonation point located in the center of the exterior of the upper booster shell, and the booster explosive ring is used for transmitting detonation waves of the booster explosive column to a main explosive column of a warhead to form annular detonation; a mounting hole is formed in the axis of the explosion-proof body and is used for mounting and fixing the bottom of the millimeter wave assembly; and a plurality of semicircular through holes which are uniformly distributed are processed from the top of the mounting hole to the outside of the annular explosion propagation device along the radial direction, and millimeter wave wires of the millimeter wave assembly can penetrate out of the semicircular through holes.

The invention discloses a small sample-based power transformation equipment infrared spectrum target identification method, which comprises the following steps of: analyzing temperature data from a collected power transformation equipment infrared spectrum, and eliminating abnormal values in the temperature data; mapping the temperature data to an interval of [0, 255] in combination with mapping transformation to generate a grayscale image; performing target detection on the grayscale image based on a Yolov5s algorithm, generating an infrared spectrum rectangular frame and identifying the category of the power transformation equipment; and performing instance segmentation on the infrared spectrum rectangular frame by using a Yoract + + algorithm, separating the power transformation equipment from the image background, and marking different parts of the power transformation equipment. According to the method, a method of combining target detection and instance segmentation is adopted, on the basis of ensuring the accuracy, the real-time performance of target identification is improved, the time and energy of detection personnel for post-processing the infrared spectrum are saved, and reliable operation of power transformation equipment is ensured.

The embodiment of the present application provides a silicon wafer processing method and device. The silicon wafer processing method includes: polishing the silicon wafer to remove the damaged layer on the surface of the silicon wafer; providing a reaction gas, wherein the reaction gas includes at least oxygen and a halogen-containing gas; at a first preset temperature, using the oxygen and the halogen-containing gas to react with the surface of the silicon wafer to form a micro-suede surface on the surface of the silicon wafer, and removing metal impurities from the silicon wafer. The embodiment of the present application can reduce the consumption of chemicals and water resources, reduce the impact of the silicon wafer micro-suede manufacturing process on the environment, avoid damage to the silicon wafer and its micro-suede, and is also conducive to the formation of a microstructure with higher coverage and higher aspect ratio, so as to enhance the light trapping effect of the micro-suede surface and improve the quality of the micro-suede surface. Moreover, the metal impurities on the surface of the silicon wafer can also be removed, thereby improving the purity of the silicon wafer.

The utility model provides a simple and convenient device for improving the accuracy of a sandstone aggregate alkali activity experiment. The simple and convenient device comprises an outer curing barrel, an inner curing barrel, a partition plate and a plurality of test piece boxes, the outer maintenance barrel and the inner maintenance barrel are both made of corrosion-resistant and high-temperature-resistant materials, the inner maintenance barrel is arranged in the outer maintenance barrel, a maintenance water storage cavity is formed between the outer maintenance barrel and the inner maintenance barrel, and barrel covers are arranged on the tops of the outer maintenance barrel and the inner maintenance barrel respectively; the interior of the inner curing cylinder is divided into at least two independent chambers by partition plates, the chambers are used for placing the test piece boxes, and the inner curing cylinder is further used for containing an alkaline solution; the liquid level of the curing water in the curing water storage cavity is higher than the liquid level of the alkaline solution in the inner curing barrel; the test piece boxes are put into different bins in groups, and the test piece boxes are mortar rod molds. The device solves the problems of gravity interference and temperature difference interference.

The invention relates to the field of high polymer materials, in particular to a heat-conducting pressure-resistant polyolefin pipe and a preparation method thereof. The heat-conducting pressure-resistant polyolefin pipe comprises the following components in parts by weight: 100 parts of polypropylene; 10 parts of HDPE (High Density Polyethylene); 2 to 10 parts of a boron nitride nanosheet MOF composite material; 3 to 15 parts by weight; the preparation method of the boron nitride nanosheet MOF composite material comprises the following steps: S1, preparing MOF from zinc nitrate hexahydrate and 2-methylimidazole; s2, enabling the MOF to react with boric acid, and then enabling the MOF to react with the boric acid, so as to obtain the boron nitride nanosheet MOF composite material. The boron nitride nanosheet MOF composite material is added into the polyolefin matrix, so that the heat-conducting property is remarkably improved. The boron nitride nanosheet MOF composite material has excellent heat-conducting property and high length-diameter ratio, and can form an effective heat-conducting network in a polymer matrix. According to the invention, by optimizing the variety and content of the filler, the heat-conducting property can be improved, and relatively good mechanical properties can be maintained at the same time.