13results about How to "Improve interfacial wettability" patented technology

The invention discloses a method for preparing porous activated carbon based on pulse electrochemical activation, the porous activated carbon and application, and the method comprises the following steps: preparing a working electrode plate from carbon powder, and placing the working electrode plate in an electrolyte for pulse electrochemical square wave circulation treatment, wherein the electrolyte is an aqueous solution containing sulfuric acid, persulfate, sulfate and a cationic surfactant, stripping, cleaning and drying to obtain the porous activated carbon. According to the preparation method, the carbon powder is prepared into the working electrode plate, and the working electrode plate is subjected to pulse electrochemical square wave circulation treatment in the electrolyte containing the sulfuric acid, the persulfate, the sulfate and the cationic surface active agent, so that the porous activated carbon with large specific surface area, high electro-adsorption capacity and good conductivity can be prepared; when being used as a raw material for preparing a capacitive deionization electrode, the composite material shows good conductivity, high desalination capacity and high desalination rate, can be widely used for electro-adsorption desalination, and is high in use value and good in application prospect.

The invention discloses a mask removing liquid medicine, a low-concentration alkaline aqueous solution and a mask removing method. The mask removing liquid medicine comprises the following raw materials in percentage by mass: 5%-15% of an alkaline activator, 0.5%-4% of a swelling agent, 0.3%-0.8% of a surfactant, 0.05%-0.3% of a complexing stabilizer and the balance of ultrapure water. In the low-concentration alkaline aqueous solution prepared by adopting the mask removing liquid medicine provided by the invention, the traditional pure solvent or high-concentration solvent is abandoned, and the mask is removed by adopting the low-concentration alkaline aqueous solution, so that the environment can be improved, the safety can be guaranteed, the cost can be greatly reduced, and meanwhile, the quality of cleaning and removing the mask can be guaranteed.

This invention discloses a high thermal conductivity semiconductor packaging substrate and its preparation method, relating to the field of electronic materials technology. The method includes the following steps: mixing composite aluminum nitride powder with a sintering aid, ball milling, drying, and pressing into shape; sintering under high temperature and high pressure in a nitrogen atmosphere to obtain an aluminum nitride ceramic substrate; washing and drying the aluminum nitride ceramic substrate; covering both sides of the aluminum nitride ceramic substrate with copper foil, laying active solder between the aluminum nitride ceramic substrate and the copper foil, and then connecting them by vacuum brazing to obtain the semiconductor packaging substrate; the composite aluminum nitride powder is composed of aluminum nitride powder and modified aluminum nitride powder in a mass ratio of (6~8):(2~4). The semiconductor packaging substrate prepared by this method has excellent interfacial compatibility, effectively reduces interfacial thermal stress, and has good thermal conductivity.

The invention discloses a heat insulation polytetrafluoroethylene composition for a missile electronic cabin cover, which adopts modified porous SiO2 as a functional filler, constructs a reversible solid-liquid phase change heat absorption system in a polytetrafluoroethylene matrix, and actively intercepts and stores intrusion heat through phase change latent heat, thereby significantly delaying the temperature rise of the back of the cabin cover; meanwhile, perfluoropolyether phosphate is introduced, so that the interface bonding between the filler and a matrix is greatly improved. The two components cooperate with each other, so that the composite material keeps the inherent low dielectric property and high mechanical strength of polytetrafluoroethylene while obtaining excellent dynamic heat insulation performance, and unification of wave transmission, heat insulation and bearing functions is realized. In addition, the process is completely compatible with an existing polytetrafluoroethylene mold pressing-sintering production line, equipment investment and energy consumption are reduced, and an efficient and low-cost technical path is provided for industrial preparation of the high-performance missile electronic cabin cover.

This invention relates to the field of semiconductor display device manufacturing technology, and discloses a reusable MicroLED chip transfer temporary carrier and its preparation method. The carrier includes a rigid support substrate layer, a peelable intermediate layer, and an elastic functional layer stacked sequentially from bottom to top. The peelable intermediate layer is a double-layer film material, including a bottom acrylic adhesive layer and an upper PVC substrate layer. The elastic functional layer is a polydimethylsiloxane layer cured on the surface of the PVC substrate layer. The preparation method includes plasma cleaning of the substrate, attaching the double-layer film material and rolling and cutting, vacuum degassing and homogenizing the adhesive, and thermal curing. By blocking the penetration of liquid adhesive through the PVC substrate layer, the aged elastic functional layer can be peeled off along with the intermediate layer, avoiding residual adhesive on the substrate. This enables the non-destructive recycling and reuse of the rigid substrate, effectively reducing chip transfer costs.

The application discloses a cutting and welding integrated device and method for a building steel decorative plate; the application sprays active alloy powder to a welding edge position to strip burr surface oxide scales and embed the powder to form a to-be-welded active layer; the active alloy powder is used to remove the burr surface oxide scales by using powder spraying kinetic energy to expose pure metal and embed the powder in the welding edge position to form a to-be-welded active layer with gradient distribution; in arc discharge, the burr tip forms a stable arc striking channel to avoid arc running away and cause the thin decorative plate to be burnt through; the embedded powder absorbs excess heat energy by phase change latent heat in the molten pool formed by layer-by-layer melting, thereby reducing the polishing process, and the burrs originally belonging to processing waste are converted into self-melting filler; meanwhile, the internal slag inclusion and opening layering defects in the splicing of dissimilar metal composite plates are radically solved, and the welding firmness between the steel decorative plates is improved.

This invention discloses a high-density, high-strength "three-layer structure" carbon-based composite material and its preparation method. The method includes: mixing activated coke with a D50 of 3-6 μm and microcrystalline graphite powder with a D50 of 10-60 μm to obtain a mixed powder; kneading the mixed powder in a kneading pan, removing moisture, heating to 160-240℃, then adding a molten binder or modified binder, and simultaneously adding a modifier, followed by kneading with the lid closed; after kneading, pouring the mixture into a rolling mill for rolling, then crushing and sieving to obtain pressed powder; vacuum-treating the pressed powder, then molding and isostatically pressing to obtain green blocks, and finally calcining to obtain the carbon-based composite material. This invention has a short production cycle and low cost. The carbon-based composite material obtained has a one-layer interface structure, a two-layer brazed structure, and a three-layer steel-concrete structure. The special "three-layer" structure design achieves a dual effect of "reinforced aggregate complementarity + micro-active layer construction," which can effectively improve the bulk density, mechanical strength, homogeneity, and stability of the carbon-based composite material.

This invention belongs to the field of all-solid-state lithium battery technology, specifically relating to a sulfide solid electrolyte interface stabilizing modification layer and its preparation method. The invention discloses a sulfide solid electrolyte interface stabilizing modification layer and its preparation method. The interface stabilizing modification layer is a Li3BO3-LiF composite nano-modification layer constructed on the surface of a sulfide solid electrolyte through an in-situ solid-phase reaction. The modification layer is a continuous, dense, crack-free thin film that forms a chemical bond with the sulfide electrolyte substrate. In the Li3BO3-LiF composite modification layer of this invention, Li3BO3 acts as a fast lithium-ion conductor, ensuring efficient lithium-ion transport between the electrolyte and the electrode; LiF, as a highly chemically stable layer, isolates the sulfide electrolyte from direct contact with lithium metal / cathode, completely suppressing interfacial side reactions. Simultaneously, the rigid LiF can physically block lithium dendrite growth, improving battery safety performance.

The application belongs to the technical field of tungsten alloy preparation, and discloses a high specific gravity tungsten alloy and a preparation method thereof, which is composed of the following components in percentage by mass: 88% to 92% of tungsten, 4% to 6% of nickel, 1.5% to 2.5% of iron, 0.05% to 0.2% of zirconium, 0.1% to 0.3% of lanthanum oxide, and the balance of inevitable impurities; the alloy is prepared by using zirconium hydride as a zirconium source, cooperating with lanthanum oxide doping modification, and sequentially passing through powder mixing and ball milling, cold isostatic pressing forming, degreasing, solid phase pre-sintering and liquid phase sintering processes, and does not need additional complex post-treatment. The high specific gravity tungsten alloy has excellent matching of strength and toughness, and the tensile strength and elongation are obviously improved compared with conventional alloys of the same type; tungsten phase grains are small and uniform, and the grain boundary bonding strength is high; the preparation process is safe and controllable, and the cost is low; the high specific gravity tungsten alloy can be adapted to the weight matching, protection and other service requirements of various high-end equipment.

This invention relates to the field of composite material preparation technology, and more particularly to a novel diamond-copper composite process. This process involves vitrifying the surface of diamond micropowder to form a uniform and dense phosphate glass film on its surface. A porous preform is then prepared and subjected to low-temperature pressure-assisted consolidation at 700–850℃ and 30–50MPa under vacuum or an inert atmosphere. This causes the solid copper to undergo plastic rheological filling of the pores. Simultaneously, the phosphate glass undergoes an in-situ interfacial reaction with diamond and copper, forming a continuous gradient interfacial bond from diamond, phosphorus carbon oxides, copper phosphorus compounds to the copper matrix. Finally, the mixture is cooled in a furnace to obtain a dense diamond-copper composite material. Compared to traditional metal plating processes, this invention significantly reduces production costs, lowers energy consumption, and enhances interfacial bonding. It is easily scalable for industrial production and is suitable for fields such as electronic packaging, aerospace, and precision instruments where high thermal conductivity, electrical conductivity, and mechanical properties of materials are required.

This invention belongs to the field of battery separator technology, specifically relating to metal-organic framework (MOF) composite separator coating materials, battery separators, and their preparation methods. The MOF composite separator coating uses a dual-ligand aluminum-based MOF composite material as the matrix, embedding deprotonated ethylenediaminetetraacetic acid (EDTA) coordination groups. The dual-ligand aluminum-based MOF composite material possesses at least a MIL-53-FA phase and a CAU-10-H phase. This invention utilizes the MIL-53-FA and CAU-10-H phases within the dual-ligand aluminum-based MOF embedded EDTA functional coating to provide porous transport channels and abundant framework sites, while EDTA provides multidentate coordination sites. This maintains the separator's good wettability to the electrolyte and ion transport channels, while also enhancing its binding capacity for dissolved metal ions, thereby reducing the migration and deposition of transition metal ions inside the battery, contributing to improved battery cycle life and rate performance.

The application discloses a surface coating of an induction coil of a medium-frequency welding machine and a preparation method thereof. The surface coating comprises a transition layer and a surface layer. The transition layer is composed of nickel-aluminum, aluminum oxide and coated powder in a weight ratio of 85-90:5-8:5-10. The surface layer is composed of aluminum oxide and potassium silicate in a weight ratio of 94-98:2-6. The coated powder is formed by coating zirconium diboride with calcium fluoride. The thickness of the transition layer is 30-150 microns. The thickness of the surface layer is 200-500 microns. The prepared coating has good bonding strength and insulation performance, and the preparation method is simple and efficient, and is suitable for various industrial applications.

The invention provides a composite negative electrode, a preparation method thereof and a solid-state lithium metal battery, and particularly relates to the technical field of lithium batteries. The composite negative electrode comprises a porous polymer substrate, wherein a first functional layer and a second functional layer are oppositely arranged on two sides of the porous polymer substrate; a lithium metal layer is further arranged on the outer side of the first functional layer in the direction far away from the porous polymer substrate; the first functional layer is made of magnesium halide and a lithium-containing compound; and the second functional layer has an interface wetting function. According to the invention, a metal current collector is completely abandoned, and the functionalized substrate is used as a carrier and a current collector, so that the proportion of inactive components is greatly reduced, and the cycle life, coulombic efficiency and mass / volume energy density are effectively enhanced while the interface dynamic performance is improved.