16results about How to "Improve surface condition" patented technology

The utility model is suitable for coal gas pipeline maintenance field provides a kind of pipeline repair subassembly, including coal gas pipeline, cover plate being installed in the outside of coal gas pipeline, strengthen cloth being wound in the surface of coal gas pipeline, fixed component being clamped in the outside of cover plate, the cover plate includes two plate bodies and sealing washer, two the plate body other side is fixedly provided with mounting plate, the sealing washer is fixedly installed in plate body inboard edge, one the plate body is set on surface and is equipped with injection port, the fixed component includes two fixed plates, two clamping bolts and two nuts, by setting fixed component, plate body is fixedly installed in the outside of coal gas pipeline, by the injection port being set, fill in the gap between plate body and coal gas pipeline and add repair agent, the sealing effect of cooperation setting sealing washer is improved, prevent repair agent to seep out, by the strengthen cloth being set, the solidification speed of repair agent can be improved, also can increase the strength after repair agent solidification.

This application relates to an embedded germanium-silicon device and its fabrication method, as well as an electronic device, comprising: providing a substrate; the substrate having sigma trenches extending into the substrate via a first surface; forming a buffer layer on the inner surface of the sigma trench, followed by forming a germanium-ene transition layer covering the buffer layer; the germanium-ene transition layer including protrusions formed due to lattice mismatch and local stress in the initial buffer layer; selectively etching and removing the protrusions and the buffer layer covering the protrusions using a pulsed plasma etching process; simultaneously repairing damage to the buffer layer and removing the germanium-ene transition layer in the same process steps; and forming a germanium-silicon seed layer that at least fills the sigma trench. This method can avoid the risk of impurity contamination, reduce the dislocation density of the buffer layer, and improve the growth quality of silicon-germanium.

The invention discloses a green deplating solution for a photovoltaic welding strip and a valuable metal separation and recovery method. The deplating solution is an aqueous solution, and solutes comprise a main oxidizing agent, a green acidic auxiliary agent, a complexing cosolvent and a copper special corrosion inhibitor; the main oxidant is selected from sodium persulfate, ammonium persulfate and ferric nitrate; the green acidic auxiliary agent is selected from sulfamic acid, methanesulfonic acid, tartaric acid and citric acid; the complexing cosolvent is selected from sodium chloride, ammonium chloride and thiourea; and the corrosion inhibitor is selected from benzotriazole, methyl benzotriazole and 2-mercapto benzimidazole. The waste welding strip is subjected to an immersion reaction at the temperature of 20-60 DEG C, tin, lead and / or silver enter the solution in the form of complex ions, and a copper substrate is kept bright and clean; and after solid-liquid separation, gradient recovery of silver extraction by replacement, lead separation by temperature difference crystallization and tin precipitation by hydrolysis can be adopted, or total replacement recovery by adding excessive zinc-based displacer can be adopted. The separation and recovery method is rapid in deplating, free of white films, low in copper loss and suitable for silver-containing and silver-free solder strips.

The invention belongs to the technical field of additives for lithium ion battery negative electrode slurry, and particularly relates to an additive for improving filtration of lithium ion battery negative electrode slurry and a preparation method thereof, the additive comprises the following raw materials by mass: 5-20 parts of a solvent, 50-80 parts of a first polymer, 10-30 parts of a second polymer, and no more than 20 parts of small molecule alcohols; wherein the first polymer comprises one or more of polyethylene glycol and / or polyethylene glycol derivatives containing non-polar groups; the second polymer comprises polyether at least containing one propylene oxide group and one ethylene oxide group; according to the additive for improving filtration of the lithium ion battery negative electrode slurry, a polyethylene glycol chain segment of a first polymer main chain extends in deionized water to provide steric hindrance and reduce particle aggregation, a non-polar functional group on the polyethylene glycol chain segment can promote combination of a polymer and graphite particles, the filtration condition of the slurry can be effectively improved, and the filtration rate is increased.

The application belongs to the technical field of laser cutting, and particularly relates to a steel structure profile laser cutting device, which comprises a workbench and a laser cutting head. An feeding assembly for clamping and conveying profiles is arranged on the workbench. The feeding assembly drives the profiles to move horizontally and rotate, so that the profiles move relatively with the laser cutting head. A work-type adaptive slag blocking mechanism is arranged on the workbench. The work-type adaptive slag blocking mechanism comprises a rectangular frame. The work-type adaptive slag blocking mechanism is used to fundamentally eliminate the situation that the laser beam needs to melt the solidified slag during subsequent cutting, so that the laser energy can directly and stably act on the profile surface, and the problems of rough section, slag hanging at the bottom and the like caused by slag scattering and surface state mutation are effectively avoided.

The invention relates to the technical field of cleaning, and discloses a photo frame material surface automatic cleaning device and method.The photo frame material surface automatic cleaning device comprises a roller conveyor and a cold air cleaning structure installed at the front end of the roller conveyor, the surface temperature of a photo frame solid wood material is reduced through cold air, water vapor is condensed on the cold air, and a condensate water film neutralizes electrostatic charges between wood and dust; and the weight of dust particles is increased, and the dust particles are mutually bonded into clusters and are matched with gas cleaning. Through a low-temperature induced instantaneous micro-condensation mechanism, static electricity is neutralized, dust is agglomerated, dust bolts are formed, thorough stripping of deep dust on the surface of the wood and in micropores is achieved in cooperation with bidirectional high-pressure airflow, and the problems that the surface is clean and deep residues exist in a traditional cleaning method are solved; meanwhile, microcosmic burrs are passivated through micro swelling and a recovery effect, surface stress is pre-released, surface tension and pore wetting balance are unified, the surface smoothness of the wood is improved, an ideal interface is created for subsequent degreasing and paint spraying, and coating defects are reduced.

The application relates to the technical field of surfactants, in particular to a low-foaming composite surfactant and application thereof in metal cutting, characterized in that the low-foaming composite surfactant is composed of 55-65% of nonionic surfactant, 4-12% of anionic surfactant, 10-20% of co-surfactant, 3-12% of functional additive and the balance of deionized water; the nonionic surfactant at least contains fatty alcohol polyoxyethylene ether and isomeric tridecanol polyoxyethylene ether; the anionic surfactant is selected from one or more of sodium alkyl benzene sulfonate, sodium fatty alcohol ether sulfate and alpha-olefin sulfonate; the co-surfactant at least contains alkyl glycoside; and the functional additive contains defoaming agent and antirust agent. The foam elimination efficiency is greatly improved through optimization of the nonionic surfactant combination and adoption of a special defoaming agent compounding scheme, and the generation and accumulation of foam in the cutting process are effectively inhibited.

This invention relates to a high-capacity Mg-RE(Sm,Nd)-Ca-Cu-Zn hydrogen storage composite material catalyzed by K2TiF6+Nb2O5, belonging to the field of solid-state hydrogen storage materials technology. It solves one of the problems of existing magnesium-based hydrogen storage materials, namely, high thermodynamic stability, complex activation process, high hydrogen desorption temperature, and slow hydrogen absorption / desorption kinetics. This invention discloses a Mg-based solid-state composite hydrogen storage material, the composition of which is: Mg... 95‑x‑y Sm x Nd y Ca2Cu 3‑z Zn z +m wt.%(K2TiF6+Nb2O5), where x, y, and z are atomic ratios, and 0.5≤x≤2, 0.5≤y≤2, 0.2≤z≤3, m is the percentage of K2TiF6+Nb2O5 in the alloy, 4≤m≤10, the mass ratio of K2TiF6 to Nb2O5 is 1:1, the preferred atomic ratio is 1.5:1.5:0.8, m=6. This high-capacity Mg-RE(Sm,Nd)-Ca-Cu-Zn-based solid hydrogen storage composite material has high hydrogen absorption and desorption capacity and excellent hydrogen absorption and desorption kinetics; moreover, the preparation process is simple and easy to operate, suitable for large-scale preparation, and can be used as a hydrogen storage / hydrogen supply carrier in various scenarios.

The invention relates to the technical field of semiconductor composite materials, and discloses a nano semiconductor composite material and a preparation method and application thereof, the nano semiconductor composite material comprises a substrate, a transition metal nitride buffer layer and a co-doped aluminum nitride single crystal film; the transition metal nitride buffer layer is deposited on the surface of one side of the substrate, and the co-doped aluminum nitride single crystal film grows on the side, away from the substrate, of the transition metal nitride buffer layer; from the whole scheme of the invention, through the synergistic effect of the component design and the process steps, the nano semiconductor composite material realizes breakthrough in multiple performance dimensions. The transition metal nitride buffer layer is combined with the co-doped structure, so that the problem that the crystallization quality and the electrical property of a traditional AlN-based material are difficult to consider at the same time is solved; through precise regulation and control of substrate pretreatment and each layer growth process, the defect problem caused by interface mismatch is effectively relieved, and the overall stability of the material is improved.

The invention discloses an electromagnetic wave absorbing coating material and a preparation method and application thereof. The coating material is composed of a component A and a component B, the mass ratio of the component A to the component B is (11: 1)-(11.5: 1), and the component A comprises the following components in parts by weight: 100-120 parts of polyurethane, 220-250 parts of a component A solvent, 220-260 parts of filler, 0.3-0.5 part of a dispersing agent, 0.3-0.5 part of an adhesion promoter and 0.3-0.5 part of a flatting agent; and the component B comprises the following components in parts by weight: 10-12 parts of an aromatic amine curing agent and 38-45 parts of a component B solvent. The electromagnetic wave absorbing coating material has low-temperature flexibility, high-temperature mechanical property and electromagnetic wave absorbing property in a wide temperature range, and can be applied to ships, aircrafts, electronic equipment or base stations and the like.

The utility model discloses a white pad for wafer rough polishing belongs to the technical field of polishing pad, a white pad for wafer rough polishing, including polishing pad layer, the upper end of polishing pad layer is provided with fluid storage pad, the upper end sealed coupling of fluid storage pad has base surface layer, the inside of fluid storage pad is provided with integrative fluid flow cavity, and the inside of fluid flow cavity has non - newtonian fluid layer. The utility model solves the problem that the existing wafer grinding pad in actual use process, and the partial buffer invalidation of polishing pad caused by the breakage of micro air bag will affect the continuity work, the non - newtonian fluid layer of the utility model in the grinding process, and the viscosity changes with the real - time change of pressure, shear rate, realizes adaptive buffer, reduces the wafer edge collapse response speed that partial stress concentration leads to, and the action of cooperation grinding particle can reduce partial leakage, and the surface uniformity is promoted.

The nitrocarburizing process for the die-casting die without the white bright layer comprises the following steps that the die-casting die is quenched and tempered for multiple times, and the hardness of the die-casting die is adjusted; cleaning the surface of the die-casting die by using alcohol; the cleaned die-casting die is put into a gas nitriding furnace to be vacuumized, and then nitrogen is introduced; adding into a nitriding furnace to 560 DEG C, introducing ammonia gas and carbon dioxide into the nitriding furnace, adjusting nitrogen potential, and preserving heat for 2-4 hours, so that the die-casting die is in a strong permeation period; the nitrogen potential is adjusted, heat preservation is conducted for 4-8 hours, and the die-casting die is in the diffusion period; and replacing by using a nitrogen atmosphere, preserving heat for 2-4 hours, and discharging and air-cooling. According to the nitrocarburizing process for the die-casting die without the white bright layer, the white bright layer is eliminated, the structure of the carburizing layer is improved, and the depth of the carburizing layer is increased so as to prolong the service life of the die.

This invention relates to a salt spray resistant and anti-aging curing coating and its preparation method, belonging to the field of coating technology. The coating includes modified epoxy resin, ternary nanocomposite filler, composite light stabilizer, hydrophobic eutectic solvent, polysiloxane-modified aromatic amine curing agent, and bio-based polyurethane curing agent. The modified epoxy resin is prepared by reacting bisphenol F epoxy resin, KH-560 silane coupling agent, and tetrabutylammonium bromide, followed by the addition of bi-terminated epoxy silicone oil, 3,3'-dithiodipropionic acid, and p-toluenesulfonic acid, and then by adding pentaerythritol phosphate and antioxidant 1010. The polysiloxane-modified aromatic amine curing agent is prepared by reacting m-phenylenediamine as a matrix, KH-560 silane coupling agent, diphenylsilanediol, and dibutyltin dilaurate. The bio-based polyurethane curing agent is prepared by reacting castor oil-modified polyol, isophorone diisocyanate, dibutyltin dilaurate, dimethylolpropionic acid, and trimethylolpropane.

This invention relates to the field of electronic ceramic substrates and provides a method for preparing a black alumina substrate, which solves the defects of existing black alumina substrates, such as low thermal conductivity and low mechanical strength, due to defects in the preparation process. The preparation steps include: (1) preparing raw materials; (2) preparing slurry; (3) casting; (4) debinding; (5) sintering; (6) annealing; and (7) surface treatment.

The invention relates to a Pt-Au catalytic electrode and a preparation method and application thereof. The preparation method comprises the following steps: (1) placing a conductive substrate in a nickel plating solution, and electroplating to obtain a nickel-plated conductive substrate; (2) placing the nickel-plated conductive substrate in a replacement liquid containing gold ions and platinum ions, and carrying out a replacement reaction to obtain a Pt-Au catalytic electrode precursor; (3) putting the Pt-Au catalytic electrode precursor into an acid solution, and carrying out acid pickling on the Pt-Au catalytic electrode precursor; (4) carrying out heat treatment on the pickled Pt-Au catalytic electrode precursor in a reducing atmosphere; and (5) putting the Pt-Au catalytic electrode precursor subjected to heat treatment into an electrolyte, and carrying out cyclic voltammetry scanning to obtain the Pt-Au catalytic electrode. The Pt-Au catalytic electrode which is high in crystallinity, good in stability, good in surface state and excellent in catalytic performance is obtained by adopting a nickel layer pre-deposition and replacement deposition strategy, and the use amount of precious metal is greatly reduced.

The invention discloses a surface treatment method for a titanium alloy vapor chamber, and belongs to the technical field of metal surface treatment. The method comprises the steps of oil removal, titanium polishing, multiple times of cleaning and ultrasonic cleaning, two times of passivation and drying, and is characterized in that an environment-friendly weak acid polishing solution without hydrofluoric acid and nitric acid is adopted for mild polishing, and a composite passivation film is formed on the surface of the titanium alloy through the two-time passivation process that treatment is conducted through a first passivation solution and a second passivation solution in sequence. According to the structural characteristics of the vapor chamber, the temperature is controlled at 1t in the whole process; and multiple normal-temperature ultrasonic cleaning is introduced at key nodes to ensure that the cavity is clean, so that the uniform-temperature plate has lasting reliability. According to the method, environment-friendly production is achieved, an obtained passive film is uniform, compact and high in adhesive force, the gas tightness yield of the treated vapor chamber reaches 99.5%, the baking resistance exceeds 1000 hours, the titanium material perfectness rate reaches 99.80%, and the reliability and durability of a product are remarkably improved.