28results about How to "Reduce holes" patented technology

The invention discloses concrete with high salt corrosion resistance and a preparation method of the concrete. The concrete is prepared from 300-400 kg / m < 3 > of cement, 50-150 kg / m < 3 > of slag powder, 1000-1200 kg / m < 3 > of gravel, 650-800 kg / m < 3 > of machine-made sand, 0.5-2 kg / m < 3 > of a modified polycarboxylic acid water reducing agent, 0.005-0.01 kg / m < 3 > of an air entraining agent, 0.05-0.1 kg / m < 3 > of an ion chelating agent, 0.05-0.1 kg / m < 3 > of polyacrylamide, 0.01-0.05 kg / m < 3 > of sodium methyl silicate, 0.1-0.5 kg / m < 3 > of multiwalled carbon nanotube dispersion liquid and 140-160 kg / m < 3 > of water. The preparation method comprises the following steps: stirring and mixing the modified polycarboxylate superplasticizer, the air entraining agent, the ion chelating agent, the polyacrylamide, the sodium methyl silicate and part of the water for mixing to obtain an admixture mixed solution; sequentially putting broken stones, cement, machine-made sand, the admixture mixed solution, the multi-walled carbon nanotube dispersion liquid and the rest of mixing water into a stirrer, and stirring for 2-3 minutes, so as to obtain the concrete with high salt corrosion resistance. The concrete has high salt corrosion resistance in a complex service environment, the service life of a concrete structure is effectively prolonged, and a reliable guarantee is provided for infrastructure construction.

The invention relates to the technical field of conductive silver paste, and discloses high-thixotropy conductive silver paste and a preparation method thereof. The prepared conductive silver paste is prepared by taking spherical silver powder and modified flake silver powder as a conductive phase and glass powder as an inorganic binding phase, and adding an organic carrier, mixing and stirring. Compared with the flake silver powder, the modified flake silver powder has better conductivity, and has better and more stable dispersity in a matrix; the modified polyurea and the hydroxy acrylic resin are introduced into the organic carrier, and the thixotropy and the adhesive force of the silver paste are improved through the synergistic effect of the modified polyurea and the hydroxy acrylic resin. Therefore, the conductive silver paste has good application prospects in the fields of electronic products, solar cells and the like.

The invention provides a heat-treatment-free die-casting Al-Si alloy and a preparation method and application thereof. The heat treatment-free die-casting Al-Si alloy comprises the following components in percentage by weight: 8.10 to 10.30 percent of Si, 0.50 to 0.57 percent of Mn, 0 to 0.5 percent of Fe, 0.26 to 0.35 percent of Mg, 0.0045 to 0.0083 percent of B, 0.10 to 0.30 percent of Ti, less than or equal to 0.005 percent of Na, less than or equal to 0.005 percent of K, less than or equal to 0.005 percent of P and the balance of Al. The preparation method of the heat-treatment-free die-casting Al-Si alloy is low in cost and short in process, the obtained alloy is few in structure defect and excellent in mechanical property, and the tensile strength, the yield strength and the ductility are 310 MPa-340 MPa, 170 MPa-200 MPa and 10%-15% respectively.

The application discloses a polytetrafluoroethylene glass fiber building film material, which comprises a glass fiber cloth, pretreatment protective layers arranged on two sides of the glass fiber cloth, a dense layer and a polyperfluoroethylene propylene resin outer layer arranged in sequence, and a non-porous film is formed through the polyperfluoroethylene propylene resin outer layer, and the holes formed by the dense layer are filled, so that the dense layer is complete. The problems of low tensile strength, poor folding resistance and surface cracking of the existing glass fiber building film material are solved.

The invention relates to the technical field of construction, and discloses a basement exterior wall formwork reinforcing and waterproof construction method under a narrow space condition, which comprises the following steps: S1, planting steel bars on the surfaces: planting steel bars on the surfaces of support piles and meat piles, preparing required materials and tools, determining the positions and the number of the planted steel bars, and marking according to design requirements; s2, net hanging, concrete spraying and leveling are conducted, specifically, materials and equipment needed by concrete spraying are prepared firstly, and then the surfaces of the supporting piles and the surfaces of the meat piles are cleaned; and S3, waterproof coating brushing: firstly, wetting the surface of the base layer by using a proper amount of water without water, then uniformly brushing the waterproof coating from one direction by using a tool, and carrying out supplementary brushing in time. According to outer wall construction, a three-section type water stop screw is adopted, a water swelling strip is pasted to the joint of the three-section type water stop screw and a waterproof roll, 2-3 times of swelling deformation is generated after the water swelling strip encounters water, all irregular surfaces, holes and gaps of joints are filled with the water swelling strip, meanwhile, huge contact pressure is generated, and leakage is thoroughly prevented.

The invention discloses an automatic drilling and tapping all-in-one machine, and relates to the technical field of machinery, the automatic drilling and tapping all-in-one machine comprises a bearing driving seat, and the side end of the top of the bearing driving seat is provided with an automatic claw clamp adjusting and fixing seat; according to the invention, under the cooperation of the self-adaptive position correction assembly, the contact adjustment formed dynamically is utilized, so that the stress contact piece can form contact with the other side of the processing position of the workpiece during processing, the accumulated positioning error is reduced, the accurate calibration of the position of the workpiece is realized, and the position deviation is controlled within an extremely small range; the position and angle of the temperature control phase change adjusting structure are dynamically adjusted according to the temperature change of different parts of the workpiece under the cooperation of the thermal change auxiliary regulation and control assembly, the problem that the machining precision is reduced due to the fact that the local temperature is too high is effectively solved, the quality stability and consistency of products are improved, the temperature fluctuation range of the workpiece is reduced by 50%-70%, and the machining efficiency is improved. And material thermal stress and deformation caused by temperature fluctuation are reduced, the service life of the cutter is prolonged, and the machining efficiency is improved by about 20%-30%.

The application relates to a building three-dimensional reconstruction method based on multi-coplanar geometry and a graph neural network, which comprises the following steps: pre-processing aerial images and ground images and obtaining an initial point matching set; iteratively extracting multiple groups of local homography matrices between the image pairs; scaling the aerial images and the ground images and constructing a multi-scale pyramid representation; performing matching by using a deep matching network; after the matching results are converged, the inverse transformation of the homography matrix is used to project back to the original image coordinate system to form a candidate cross-platform corresponding point line set; and verified cross-platform control point set is used to replace the matching input of the reconstruction process to output a final building three-dimensional model. The application can obtain sufficient, uniform and geometrically consistent cross-platform control points in cross-platform image pairs with large angle differences, scale changes and local occlusions, thereby replacing or reinforcing the matching input of traditional three-dimensional reconstruction, and realizing high-precision, high-completeness three-dimensional reconstruction and detail recovery of a city building scene.

The present disclosure provides a light-emitting diode with improved peeling and tearing and a preparation method thereof, and belongs to the technical field of optoelectronic manufacturing. The light-emitting diode comprises an epitaxial layer, a functional stack layer, an electrode and a filling layer. The functional stack layer is located on the epitaxial layer, and the electrode is located on the functional stack layer and electrically connected with the epitaxial layer. The surface of the functional stack layer away from the epitaxial layer comprises a stepped surface, and the filling layer is located on the stepped surface. The embodiment of the present disclosure can improve the problem that the bonding metal is easily torn and damaged during laser peeling, and improve the reliability of the light-emitting diode.

The invention belongs to the technical field of hard alloys, and particularly relates to a high-wear-resistance tungsten steel alloy and a preparation method thereof. The raw materials of the high-wear-resistance tungsten steel alloy comprise WC, Al-Sn-B nanometer oxide and a SiN / GO toughening phase, the tungsten steel alloy is designed to be of a gradient structure, the surface layer has hardness and wear resistance, the inner layer has good fracture toughness, WC is the main hard phase in the tungsten steel alloy, extremely high hardness and wear resistance are provided, and the high-wear-resistance tungsten steel alloy can be used for manufacturing the high-wear-resistance tungsten steel alloy. The Al-Sn-B nano oxide is added to form a sintering aid, so that the diffusion mass transfer process of WC in high-temperature solid-phase sintering is enhanced, the densification of the tungsten steel alloy is accelerated, and the fracture toughness of the tungsten steel alloy is improved by adding the SiN / GO toughening phase and utilizing a graphene toughening mechanism; the prepared high-wear-resistance tungsten steel alloy has excellent wear resistance and high-temperature oxidation resistance, and good toughness, strength and bending resistance.

This disclosure relates to the photovoltaic field, providing a photovoltaic cell and its manufacturing method, a tandem cell, and a photovoltaic module. The manufacturing method of the photovoltaic cell includes: providing a cell substrate having two surface sides opposite each other along a first direction; printing a first paste on at least one surface side, the first paste including at least first conductive particles and second conductive particles, both the first and second conductive particles containing silver, and the silver content of the first conductive particles being lower than that of the second conductive particles; modifying the first paste to transform it into a transport layer, the modification treatment including a first stage and a second stage, wherein the energy density provided to the first paste in the first stage is lower than the energy density provided to the first paste in the second stage. This disclosure at least helps to improve the conductivity of the formed transport layer while simplifying the preparation process of the transport layer.

The invention discloses a synthesis process of aluminum hypophosphite synergistic system flame-retardant polyamide, which belongs to the technical field of polyamide materials, and comprises the following steps: firstly, modifying the surface of an aluminum hypophosphite material by a mechanical grinding method; meanwhile, an aluminate coupling agent and a rare earth aluminate coupling agent are respectively matched to react to generate a reticular cross-linked macromolecular structure, and a micromolecular substance triphenyl phosphate is used as a synergist to improve the compatibility of aluminum hypophosphite in a PA6 composite material system; and then, taking the modified aluminum hypophosphite prepared in the previous step as a flame retardant, and dissolving epoxy silicon resin in methylbenzene to serve as a synergistic component, so that the initial decomposition temperature and the thermal degradation rate of the polyamide composite flame-retardant material are reduced, and the carbon residue amount of the polyamide composite material is further increased. According to the synthesis process of the aluminum hypophosphite synergistic system flame-retardant polyamide, the technical problems of large addition amount and poor compatibility with materials of an inorganic flame retardant in the prior art are solved.

The utility model discloses crushing and recycling equipment for plastic defective products, which belongs to the technical field of plastic product production and processing and comprises a crushing cylinder, four groups of supporting rods are arranged at the bottom of the crushing cylinder, and a first driving mechanism and a second driving mechanism are arranged on the crushing cylinder. The first driving mechanism is connected with a first crushing roller arranged in the crushing cylinder, the second driving mechanism is connected with a second crushing roller arranged in the crushing cylinder, the two sides of the top of the crushing cylinder are fixedly connected with supporting frames, and the supporting frames are provided with pressing cylinders. And through arrangement of the pressing cylinder and the pressing plate, a plurality of plastic products can be pressed, so that holes in the plastic products are reduced, the space in which the plastic can extend during crushing is reduced, and the crushing effect is improved.

This invention discloses a shower head, comprising: a body having a water inlet channel; a first water distribution chamber, the first water distribution chamber having a first movable shaft, a first water outlet, a second water outlet, and a first water inlet connected to the water inlet channel, the first movable shaft being used to open and close the first water outlet and the second water outlet; a second water distribution chamber, the second water distribution chamber having a second movable shaft, a third water outlet, a fourth water outlet, and a second water inlet connected to the second water outlet, the second movable shaft being used to open and close the third water outlet and the fourth water outlet; a first water outlet channel that can be connected to the first water outlet, a second water outlet channel that can be connected to the third water outlet, and a third water outlet channel that can be connected to the fourth water outlet; a first water outlet hole that can be connected to the first water outlet channel and the second water outlet channel, the second water outlet channel being coaxially arranged with the first water outlet hole; capable of realizing a powerful single-pour water injection plus sheet water output at the same hole position, convenient for user use.

A partitioned turbine blade with an oscillating jet cooling structure and its operating method are disclosed, belonging to the fields of energy and power engineering and turbine blade cooling. The blade includes a blade shell, a jet oscillator, a cooling airflow delivery chamber, internal impact holes, external film cooling holes, and turbulence columns. In this invention, the cooling airflow impacts and cools the inner wall of the blade through the impact holes. Utilizing the characteristic of the jet oscillator to generate a large-area high-frequency sweep without moving parts, a single row of jet oscillators is used on the suction side and leading edge of the blade. Considering that the cooling demand on the pressure side is greater than that on the suction side, the pressure side fluid oscillators are arranged in two staggered rows to generate a large-area, full cooling film on the blade surface for blade cooling.

The invention discloses a flexible laminated perovskite solar cell and a preparation method of the flexible laminated perovskite solar cell. The solar cell sequentially comprises a flexible substrate, a bottom electrode, a carrier transport layer 1, a wide-band-gap perovskite light absorption layer, a carrier transport layer 2, a tunneling composite layer, a carrier transport layer 3, a narrow-band-gap perovskite light absorption layer, a carrier transport layer 4 and a top electrode from a light receiving front side to a light receiving back side. Wherein the wide-band-gap perovskite light absorption layer is made of a wide-band-gap perovskite material and a polymer elastomer. According to the invention, the polymer elastomer is introduced in the preparation process of the wide-band-gap perovskite light absorption layer, so that the waterproof performance of the wide-band-gap perovskite light absorption layer is enhanced, the thickness of the subsequent tunneling composite layer is reduced, and the bending resistance of the solar cell device is improved; and meanwhile, the problem that the wide-band-gap top cell is dissolved when the narrow-band-gap perovskite light absorption layer is prepared subsequently is solved.

The invention discloses a garnet type composite oxide solid-state electrolyte, a solid-state battery and a preparation method of the garnet type composite oxide solid-state electrolyte, the chemical general formula of the electrolyte is Li < 7 > La < 3-x > Zr < 2-y > M < z > O < 12 > awt% Al < 2 > O < 3 >, 0 < = x < = 3, 0 < = y < = 0.5, z = x + y, and 1.5 < = a < = 22. Through specific multi-element doping and component regulation, the ionic conductivity of the prepared solid electrolyte is improved to 1.95 * 10 <-2.74 > * 10 < S > / cm and is far higher than that of a traditional LLZO-based electrolyte on the premise that the pure LLZO crystal phase structure is kept stable and the ceramic density is kept at the excellent level of 85.4%-98.6%; and meanwhile, the ion transmission impedance of the electrolyte is reduced to 48.5-97.3 omega.cm, and the ionic conduction dynamic characteristic is remarkably improved. The technical problems that a traditional LLZO-based electrolyte is low in ionic conductivity and an impure phase is easy to generate are solved, and the prepared solid electrolyte has structural stability and excellent ionic conduction performance and has important application value in the field of solid lithium ion batteries.

This invention discloses a thin-film solar cell with synergistic passivation and field-effect modulation functions, and its fabrication method, belonging to the field of solar cell technology. The core of this invention lies in introducing an ultrathin barium titanate (BaTiO3) interlayer between the back electrode and the CZTSSe absorber layer. This interlayer not only passively blocks electron backflow and suppresses interfacial recombination by utilizing its large conduction band offset with CZTSSe, but more importantly, it can induce BaTiO3 absorption during high-temperature selenization. 2+ Cu in CZTSSe + Non-equivalent cation migration and exchange occur, thereby actively constructing a directionally favorable cation migration and exchange-induced built-in electric field (CME-field) within the quasi-neutral region of the absorber layer, synergistically promoting the collection of photogenerated holes. This invention achieves a synergistic effect of "passive blocking" and "active driving," significantly improving battery performance and increasing the photoelectric conversion efficiency of battery devices to 14.00%.

The embodiment of the utility model discloses a laser beam combiner and laser welding equipment. The laser beam combiner comprises an input optical fiber, the input optical fiber comprises a central optical fiber and a plurality of outer ring optical fibers, the plurality of outer ring optical fibers are arranged around the central optical fiber, and the power of the outer ring optical fibers is smaller than that of the central optical fiber; the output optical fiber is an annular optical fiber and is used for outputting an annular light spot; the welding module is used for welding and fixing the input optical fiber and the output optical fiber; and the cavity is used for accommodating the welding module, the partial area, close to the welding module, of the input optical fiber and the partial area, close to the welding module, of the output optical fiber. According to the laser beam combiner and the laser welding equipment, the welding efficiency can be improved.

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a lithium cobalt oxide positive electrode material, a preparation method thereof and a lithium ion battery. The preparation raw materials of the lithium cobalt oxide positive electrode material comprise a cobalt-containing precursor, a lithium source, a first fluorine-containing additive and a second fluorine-containing additive, the first fluorine-containing additive comprises at least one of lithium fluoride, ammonium fluoride, ammonium bifluoride and polyvinylidene fluoride; the second fluorine-containing additive comprises at least one of barium fluoride, lanthanum fluoride, strontium fluoride, calcium fluoride and magnesium fluoride; in the sintering process of the lithium cobalt oxide positive electrode material, the first fluorine-containing additive which is volatile at a high temperature and the second fluorine-containing additive which is relatively large in element ion radius and relatively low in electronegativity are used, so that uniform growth of crystals and embedding of lithium ions can be promoted, the integrity of the crystals is improved, and internal holes and microcracks of the crystals are reduced; and the obtained lithium cobalt oxide positive electrode material is relatively small in internal stress, has relatively good thermal stability and electrochemical performance, and is beneficial to improving the rate capability of the battery.

The present invention discloses a magnetic material processing and forming mold, which specifically relates to the technical field of magnetic material processing devices, including a machine platform, a die-casting structure is fixedly connected to the middle part of the upper end of the machine platform, a material filling structure slidably connected to the upper end of the machine platform is arranged on the inner side of the die-casting structure, a feeding device connected to the material filling structure through a feeding pipe is fixedly connected to the upper end of the machine platform, and a die discharge structure slidably connected to the die-casting structure is arranged in the inner cavity of the machine platform. The magnetic material processing and forming mold described in the present invention uses the cooperation of the die-casting structure and the die discharge structure to push out the die-casted magnetic element during the die-casting ascending process of the die-casting structure, and pushes the magnetic element forward through the action of the material filling structure, and finally enters the discharge conveyor belt through the guide slope to be sent out, and at the same time, the material filling structure replenishes the die discharge structure, completes automatic loading, demoulding, and discharging, simplifies the production process, and improves product production efficiency and quality.

This utility model provides a rubber cap, bottle, and product, including a cap body and a cut on the cap body. The cut is a dotted line cut, with one cut length A, and the uncut gap length B between two cuts. The ratio of adjacent cuts to gaps, A:B, ranges from 1:1 to 1:4. This utility model's cap cut ensures that the cap will not easily burst open when shrinking, greatly improving production efficiency and preventing large-scale waste caused by the cap bursting during shrinkage. It also makes the holes created by the shrinkage of the cut more uniform and smaller, making the difference in hole diameter difficult to discern with the human eye, thus enhancing the aesthetics of the cap.

The invention relates to the technical field of ceramic metallization, in particular to a method for preparing a metallized ceramic silver paste, comprising the steps of preparing a nano-flaky silver powder with a thickness of ≤1nm and a diameter-to-thickness ratio of ≥100; preparing a glass powder; and mixing the glass powder, the nano-flaky silver powder and an organic carrier in a mass ratio of 1-5:60-80:30-40, ball-milling and degassing. The silver paste prepared by the invention has good bonding strength with an Al2O3 ceramic substrate after sintering, and has low volume resistivity and good conductive performance.

The utility model relates to textile machinery technical field discloses a kind of knitted fabric density's knitted fabric machine head structure, including needle body and positioning box, the top of needle body is fixedly connected with the locking assembly for being locked with external structure, the top of locking assembly is fixedly connected with sharp needle, the inside of positioning box is slidably connected with sliding box, the inside of sliding box is equipped with two card mouth, the inner wall of sharp needle is slidably connected in the positioning box, the inner wall of card mouth is movably connected with movable ball, the inner wall of sliding box is fixedly connected with magnetic disc, in the utility model, external connecting rod drives sharp needle to change position, so that two movable balls are clamped into the inner wall of two buckles, when needle head knits, its top is using magnetic attraction locking detachable connection structure, the quick installation and replacement of needle head are facilitated, production efficiency is improved, and connection is stable.

This invention relates to a method for fabricating a light-emitting element based on an ultra-smooth interface composite functional transparent conductive layer, comprising the following steps: (1) providing a substrate and performing epitaxial growth; (2) growing a composite functional layer with a thickness of 5-10 nm on the surface of the epitaxial structure; (3) polishing the composite functional layer to ensure that the surface roughness Ra < 0.2 nm; (4) defining the photonic crystal pattern and etching photonic crystal pre-holes in the composite functional layer; (5) depositing the composite transparent conductive layer: firstly, using an atomic layer deposition system (ALD), filling the photonic crystal pre-holes with an ITO material of an indium-tin weight ratio of 90:10, and then growing a second ITO layer with a thickness of 30 nm and an indium-tin weight ratio of 95:5 as a current diffusion layer by sputtering or ion beam deposition, and finally performing high-temperature thermal annealing; this invention optimizes the light extraction efficiency and current diffusion performance of the device by combining fundamental planarization of the substrate interface with the precise fabrication of nanophotonic structures.

The application relates to the technical field of ceramic preparation, and provides a preparation method of high-thermal-conductivity aluminum nitride ceramic, which solves the problems of relatively poor thermal conductive performance and bending strength of the aluminum nitride ceramic prepared by the prior art; the method comprises the following preparation steps: 1) raw material preparation; 2) ball milling mixing; 3) preheating reduction; and 4) hot-pressing sintering.

The application discloses a kind of super-hydrophobic unit cell powder, which is composed of particles in unit cell structure; each unit cell particle has a shell of super-hydrophobic round diatomite, and the round diatomite has a hollow porous structure; the hollow cavity of the diatomite is filled with super-hydrophobic inorganic nanoparticles and corrosion inhibitor filled in the gap between the inorganic nanoparticles, and a membrane for sealing the pores of the diatomite shell is also provided. The application also discloses a preparation method of the super-hydrophobic unit cell powder and its application in preparing a composite anticorrosive coating. During the formation of the coating, the unit cell particles are connected to the resin through chemical cross-linking by the hydroxyl groups on the surface of the unit cell particles, and the unit cell particles are connected to the resin through chemical bonding, which can significantly improve the compatibility and bonding force of the unit cell particles and the resin. By increasing the spraying pressure during spraying, the vertical density of the coating is improved, and the coating has good mechanical strength and long-term corrosion resistance due to the synergistic effect of multiple factors.

The utility model relates to the technical field of computers, and discloses a dustproof antistatic computer case which comprises a case body and heat dissipation holes formed in the top of the case body, and further comprises supporting legs fixed to the four corners of the bottom of the case body, a bearing shell is fixedly connected to one side of the top of an inner cavity of the case body, and a connecting frame is arranged at the top of the case body; and the limiting shell is fixed on one side of the connecting frame. The dehumidifying agent is stored in the fixing shell, so that the interior of the case can be dehumidified, the possibility of static accumulation can be reduced due to the fact that the environment humidity in the case is low, and when the environment humidity is low, moisture in air can absorb static electricity, static ions lose activity, static accumulation is not prone to being formed, and therefore the moisture in the case can be effectively removed. And the electrostatic protection filter plate is additionally arranged at the tops of the heat dissipation holes, and the electrostatic protection filter plate is smaller than the holes of the heat dissipation holes, so that heat dissipation is ensured, and dust falling into the case body can be reduced.

The present invention provides a multi-chip stacking packaging structure and a manufacturing method thereof, wherein a plurality of packaging units are stacked on a substrate in sequence along the longitudinal direction, and a plastic encapsulation layer II covers all the packaging units; the packaging unit includes a plastic encapsulation layer I, a memory chip and an interposer chip, the memory chip and the interposer chip are interconnected through a rewiring layer, and the packaging units are electrically connected through connection bumps. The present invention combines fan-out packaging technology with TSV technology, and does not require each packaging unit to include a substrate, thereby realizing a lightweight packaging structure, and the signal is vertically transmitted through the interposer chip, and it is not necessary to process TSV on the memory chip; the present invention also increases the number of connection points of the memory chip through the rewiring layer, so that the interconnection between the packaging units is easier and faster to achieve; and the present invention improves the structure of NCF, with the first film layer with low fluidity playing a supporting role to reduce the overflow of the adhesive film, and the second film layer with high fluidity is melted first, so that the connection bumps are easier to pass through and the cold solder joints are reduced.