43results about How to "Improve surface condition" patented technology

The invention discloses polyether modified silicone oil for improving polyol compatibility and application of the polyether modified silicone oil in a polyurethane foam composition. The structure of the polyether modified silicone oil simultaneously comprises the following chain segments: (a) a polyoxyethylene ether chain segment; and (b) alkylated polyoxyethylene polyoxypropylene ether chain segments, wherein EO and PO can be random copolymerization or block copolymerization. Wherein the molar ratio of the polyoxyethylene ether chain segment to the alkylated polyoxyethylene polyoxypropylene ether chain segment is 1: (0.6-4), preferably 1: (1-2). The polyurethane composition comprises a component A and a component B, the component A is an isocyanate reactive component and comprises polyol, a catalyst, a foaming agent and polyether modified silicone oil; and the component B is an isocyanate component. The polyether modified silicone oil has the functions of a compatilizer and a foam stabilizer, and a polyurethane composition has good storage performance and foaming stability and can be used for preparing a polyurethane foaming material.

The invention relates to the technical field of precious metal alloy material manufacturing, in particular to a process for hardening treatment of gold through micro-nano metal powder, which comprises the steps of blank charging, smelting, vacuum ingot casting, surface cleaning, rolling stretching and age hardening, product surface treatment, product welding and the like. The method has the advantages that in the aspect of material selection, the micro-nano metal powder, such as titanium powder and cobalt powder, is diversified and is small in adding amount, various strengthening mechanisms can be provided, and the economical efficiency is guaranteed. The smelting process is accurate, good vacuum and temperature control is achieved, and stirring is uniform after micro-nano metal powder is added. And rapidly solidifying the cast ingot by using a water-cooling copper mold, treating the surface by using aqua regia and the like, and drying. Midway annealing can be executed through rolling and stretching, and the process is flexible. Product manufacturing processes are diversified, and surface treatment includes polishing, electroplating, coloring and the like. Advanced modes such as laser are adopted for welding to avoid hardness reduction. According to the process, the gold hardening treatment effect and quality are improved from multiple aspects, different requirements are met, and wide application prospects are achieved.

The invention discloses a cyaniding silver plating processing device and method for aero-engine parts, and belongs to the technical field of aero-engine part processing. The cyaniding silver plating processing method for the aero-engine parts mainly comprises the following process steps of acceptance check, water solution oil removal, liquid sand blowing, electrolytic oil removal, cyaniding copper pre-plating, cyaniding silver pre-plating, cyaniding silver plating, neutralization, hydrogen removal and inspection. According to the structural size of the wandering star gear roller bearing retainer, the technical characteristics of the cyaniding silver plating process are combined, the cyaniding silver plating process is optimized, a pulse power supply is adopted to replace a direct-current power supply for cyaniding silver plating processing, and distribution deposition of a silver plating layer is optimized by setting a proper duty ratio, electroplating time and current density; the problem of non-uniform thickness of a silver coating on the part surface is solved; meanwhile, a part pocket silver coating binding force detection tool is designed, and the problems that the thickness of a cyanide silver coating of the wandering star gear roller bearing retainer is not uniform and the binding force of a working face pocket is difficult to detect are solved.

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.

The present invention belongs to the technical field of hot-dip galvanizing, and specifically relates to a method for preparing a hot-dip galvanized iron component with high adhesion and corrosion resistance. The preparation method comprises the following steps: immersing the iron component after being sequentially treated with alkali washing and degreasing, pickling and rust removal, and clean water rinsing in a plating-assisting solvent, performing the plating-assisting treatment for 30s to 5min at a temperature of 40 to 70°C, drying after taking it out, and then immersing it in a hot-dip galvanizing solution for hot-dip plating, cooling after taking it out, and obtaining a hot-dip galvanized iron component with high adhesion and corrosion resistance; the plating-assisting solvent is an aqueous solution containing the following concentration components: 80 to 150 g / L of zinc chloride, 60 to 120 g / L of zinc acetate, 10 to 30 g / L of acetic acid, and 5 to 20 g / L of cyclodextrin. The plating-assisting solvent of the present invention adopts a combination of zinc chloride, zinc acetate and acetic acid as the main rust removal functional component, and adopts a small amount of cyclodextrin as a crystallization film-forming auxiliary agent, which can significantly reduce the amount of hot-dip galvanizing smoke generated and improve the hot-dip galvanizing effect.

The invention belongs to the technical field of chemical machinery, and discloses an acidic polishing solution and application thereof in indium antimonide surface polishing. The acidic polishing solution comprises 5 to 15 wt% of acidic silica sol, 0.1 to 2 wt% of an oxidant, 0.01 to 1 wt% of a polishing accelerator, 0.01 to 1 wt% of a surfactant and the balance of water. The preparation method of the acidic silica sol comprises the step of exchanging alkaline silica sol through cation exchange resin to obtain the acidic silica sol. The polishing solution provided by the invention is suitable for InSb surface polishing, the indium antimonide surface polished by the polishing solution is good in state and free of surface defects such as scratches and pits, and the surface roughness Ra measured by AFM can reach about 1 nanometer or below; meanwhile, the polishing solution has the characteristics of high polishing removal rate, stable polishing performance, greenness, environmental protection and no pollution, and the polishing removal rate can reach more than 0.2 micron / minute.

The invention relates to multifunctional bin cover and roller adjustment integrated tobacco feeding equipment which comprises a feeding roller, a bin cover arranged at the front end of the feeding roller and provided with a feeding opening, and a roller rear chamber arranged at the rear end of the feeding roller and provided with a discharging opening. An XY-axis moving platform, a feeding nozzle module, a hot steam nozzle module, a cleaning nozzle module and a monitoring module are arranged in the bin cover, the XY-axis moving platform is vertically arranged, and the feeding nozzle module, the hot steam nozzle module, the cleaning nozzle module and the monitoring module are driven by the XY-axis moving platform to move. The high-precision X-axis and Y-axis moving platform is arranged on the bin cover, the multifunctional and modular design is combined, and the bin cover is suitable for various real scenes. Through an adjustable high-degree-of-freedom structure of the roller and inclination control, the equipment can achieve efficient and stable movement operation, meanwhile has high expansibility and easy maintainability, is suitable for being used under various process requirements, remarkably improves the production efficiency and the operation convenience, and is high in adaptability.

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.

A release agent composition comprising (A) an alkyd resin having a hardness of 8-30 MPa, (B) an amino resin, and (C) an organopolysiloxane having, in one molecule, two or more functional groups that can be chemically bonded to one or more resins selected from the group consisting of component (A) and component (B), has good peelability and reusability, and has an excellent surface state of a coating film of a release agent.

The method for preparing the gradient heterogeneous lamellar structure titanium alloy comprises the following steps that a titanium alloy plate blank is subjected to heat preservation at the temperature higher than the beta transformation temperature for at least 30 minutes, water cooling is conducted to the room temperature, and a first blank is obtained; the first blank is heated to 700-850 DEG C, heat preservation is conducted for at least 5 minutes, corrugated roller rolling is conducted, corrugated surfaces are formed on the upper end face and the lower end face of the plate, and a second blank is obtained; the second blank is heated to 650-800 DEG C and subjected to heat preservation for at least 5 minutes, multi-pass flat roller rolling is carried out to flatten the corrugated surface, and a third blank is obtained; and the surface of the third blank which is flattened through rolling is polished, shot blasting treatment is conducted on the polished end face, and the gradient heterogeneous lamellar structure titanium alloy is obtained. The product obtained by the method provided by the invention has the advantages of high tensile strength and better plasticity and toughness.

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 invention discloses a cyanide-free electroplating machining device and method for aero-engine parts, and belongs to the technical field of aero-engine part machining. The cyanide-free electroplating processing technology for the aero-engine parts mainly comprises the steps of acceptance check, water agent oil removal, liquid sand blowing, electrolytic oil removal, weak corrosion, cyanide-free copper pre-plating, cyanide-free silver pre-plating, cyanide-free silver plating, neutralization, hydrogen removal and inspection. The cyanide-free silver plating technology is adopted to replace cyanide silver plating, the silver plating machining technology of the wandering star gear roller bearing retainer is optimized, the phenomenon that power lines are not evenly distributed due to the special structure of parts can be improved, the problems that a silver plating layer of the roller bearing retainer is not even in thickness and poor in binding force are solved, and the service life of the roller bearing retainer is prolonged. And the quality of a silver coating of the roller bearing retainer is effectively improved, and good application and popularization effects are achieved.

The invention relates to the technical field of spot welding equipment, and particularly discloses an automatic positioning spot welding device adaptive to a PCBA processing production line, the automatic positioning spot welding device comprises a rack and a conveying belt, and the conveying belt is rotatably arranged at the top of the rack. The PCBA to be machined is subjected to automatic spot welding machining to the position under the spot welding assembly through the conveying belt, before the PCBA is subjected to spot welding machining, the surface of the PCBA to be machined is cleaned through the feeding treatment frame, the quality of the PCBA in follow-up spot welding machining is guaranteed, and after the surface of the PCBA is cleaned, the PCBA is subjected to automatic spot welding machining. The PCBA is fed into the spot welding processing frame to be subjected to automatic positioning spot welding processing, after automatic positioning spot welding processing of the PCBA is completed in the spot welding processing frame, welding slag cleaning processing is conducted on the PCBA subjected to spot welding processing through the discharging processing frame, and the surface quality of the PCBA subjected to spot welding processing is improved to a great extent.

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 belongs to the technical field of target materials, and discloses TCO target material powder and a preparation method thereof.The TCO target material powder is obtained by conducting slurry preparation, spray granulation, sieving and homogenizing on main material powder and auxiliary material powder; the surface of the powder obtained by spray granulation contains a release agent coated by spraying, and the release agent is a stearic acid-ethanol solution containing 0.5-4% by mass of stearic acid; the surface of the TCO target material powder is coated with a layer of stearic acid, so that the fluidity of the powder can be effectively enhanced, the powder is further graded and sieved and then is matched with powder with different particle sizes to be homogenized, the tap density of the TCO target material powder is improved, and the demolding performance of the TCO target material powder after compression molding can also be improved; in addition, the invention further provides a TCO target material prepared from the TCO target material powder.

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.

The invention provides a slurry type manganese positive electrode electrolyte for a flow battery, and belongs to the technical field of electrochemical energy storage. The slurry type manganese positive electrode electrolyte for the flow battery comprises manganese salt, an additive and acid, the additive is tetravalent zirconium salt. Zirconium ions are added into the electrolyte, and in the process of oxidizing divalent manganese ions into manganese dioxide, the zirconium ions can improve the morphology and surface state of manganese dioxide deposition particles, so that the manganese dioxide deposition particles cannot be adhered to the inner wall of a current collector or a circulation pipeline, the reaction activity of the manganese dioxide deposition particles is improved, and the discharge capacity, the cycle stability and the coulombic efficiency are further remarkably improved.

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 provides a method for improving uneven temperature control of an etching cavity electrostatic chuck, which comprises the following steps: providing an etching machine table, and installing a new electrostatic chuck in an etching cavity of the etching machine table; a first preset number of wafers are provided, one wafer is conveyed to the electrostatic chuck every time to be fixed, first etching gas is input to clean the etching cavity, and the first etching gas is oxygen; a second preset number of wafers are provided, one wafer is conveyed to the electrostatic chuck every time to be fixed, second etching gas is input for aging treatment, and the second etching gas comprises fluorine-containing etching gas; and repeatedly executing the steps for a preset number of times. The surface state of a new electrostatic chuck can be rapidly changed through aging treatment, residual polymers can be removed through cleaning treatment, the situation that excessive polymer deposition influences other parts is avoided, and aging of the electrostatic chuck can be rapidly achieved without affecting the service life and the etching effect of an etching cavity through circulation of the two processes.

This invention relates to the technical field of composite material preparation, specifically to a method for preparing a functional masterbatch of polycarbonate with arrayed carbon nanotubes and the resulting composite material. The method for preparing the functional masterbatch of polycarbonate with arrayed carbon nanotubes includes the following steps: heating a high-speed mixer to 90-100°C, adding arrayed carbon nanotubes, a silane coupling agent, and a lubricant to the high-speed mixer and mixing uniformly to obtain a premix; adding the premix, polycarbonate, a dispersant, and an antioxidant to a Banbury mixer and mixing to obtain a uniform semi-molten material; forcibly feeding the semi-molten material into a twin-screw extruder using a twin-cone feeder, and after mixing, shearing, and extrusion in the twin-screw extruder, discharging it into a single-screw extruder; after homogenization again in the single-screw extruder, extruding and granulating. This preparation method uniformly disperses arrayed carbon nanotubes in polycarbonate resin. Composite materials produced using this functional masterbatch exhibit excellent mechanical properties, electrical conductivity or antistatic properties, and surface finish, making them widely applicable.

The invention provides a non-contact test method for a notch outline of a polished silicon wafer. The non-contact test method comprises the following steps: providing a polished silicon wafer with a notch; depositing a layer of film at the gap position of the polished silicon wafer to change the glossiness and roughness of the surface of the gap; using a non-contact testing device to obtain surface contour data of the gap position after the film is deposited; and performing data analysis on the obtained surface contour data. The invention provides a non-contact testing method, which not only can effectively solve the problem that the notch outline of the polished silicon wafer cannot be represented in a non-destructive form in the prior art, improves the silicon wafer detection precision and the product quality control level, but also improves the surface state of the notch by depositing the film, thereby improving the quality of the silicon wafer. The laser signal of the high-glossiness area is effectively acquired, and the accuracy of optical test data is ensured.

The invention relates to the field of medical instruments, and discloses a CGM working electrode and a preparation method thereof. The working electrode comprises a flexible base layer, a metal conductive layer, a catalytic reaction layer, a surface modification layer, a biological enzyme sensing layer and a hydrophilic and hydrophobic semipermeable membrane layer which are sequentially stacked, wherein the surface modification layer forms a three-dimensional network structure on the surface of the catalytic reaction layer through silanization treatment and is used for enhancing biological enzyme immobilization; the semi-permeable membrane layer is composed of biocompatible polymers and used for selectively controlling permeation of glucose molecules. By the adoption of the technical scheme, the biocompatibility and measurement precision of the electrode are improved, the service life of the electrode is prolonged through the special structural design, and the electrode is simple in preparation process, controllable in cost and suitable for industrial popularization.

The invention provides a method for preparing porous ceramic through sol modified SiC particle photocuring, which comprises the following steps: forming a layer of uniform SiO2 coating on the surface of the SiC particle through sol treatment, then preparing the modified SiC particle into photocuring printing slurry, using the photocuring printing slurry to manufacture a SiC green body with a complex shape, and finally preparing the porous SiC ceramic through degreasing and sintering processes. And the SiO2 coating not only can improve the photocuring printing performance of the SiC particles, but also effectively prevents Al and SiC from directly reacting to generate a harmful phase Al4C3 in the subsequent metal infiltration process. The method is simple in process, controllable in parameter, stable and reliable, the obtained porous SiC ceramic has a continuous three-dimensional pore structure, the pore structure and the size are suitable for aluminum melt flowing and complete filling, and the porous SiC ceramic can be used for preparing a high-fraction SiC / Al composite material with a complex structure and has good application prospects. And the application of the photocuring printing technology in the fields of deep-color ceramic printing and complex-structure SiC / metal composite material manufacturing is expected to be widened.

The invention provides a plasma processing method. The method comprises a first etching step (S01) for etching the ruthenium-containing film using plasma and a second etching step (S02) for etching the ruthenium-containing film using plasma after the first etching step, the second etching step comprising: a first step (S11) for forming a modified layer on the surface of the ruthenium-containing film using plasma generated from a halogen element-containing gas; and a second step (S12) in which the modified layer is separated using plasma generated from an oxygen element-containing gas, and the first step and the second step are alternately repeated.

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 invention provides a chemical mechanical polishing solution as well as a preparation method and application thereof. The chemical mechanical polishing liquid comprises grinding particles, an oxidizing agent, a corrosion inhibitor, a pH regulator, a polishing accelerant and water. By introducing the corrosion inhibitor into the chemical mechanical polishing solution, corrosion of gallium arsenide wafers can be well inhibited, a good polishing effect is obtained, the removal rate of gallium arsenide can reach 10000 / min or above, the surface roughness after polishing can be as low as 0.32 nm, the static corrosion rate can be as low as 125.31 / min, the high polishing rate and the good surface roughness can be achieved, and the chemical mechanical polishing solution can be applied to polishing of gallium arsenide wafers. And meanwhile, the gallium arsenide polishing solution has relatively low static corrosion rate and low production cost, and efficient and stable polishing of the gallium arsenide polishing solution is realized.

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.