165 results about "Aluminum coating" patented technology

The invention discloses a self-lubricating aluminum coating and a preparation method thereof.The preparation method comprises the steps that molybdenum disulfide is pretreated through a silane coupling agent, tetraethoxysilane mixed liquor is added, the pH is adjusted to be 9-10, a water bath reaction is conducted, and molybdenum disulfide-silicon dioxide microcapsules are obtained after high-temperature strengthening treatment; respectively adding a zinc nitrate solution and a hexamethylenetetramine solution, adjusting the pH value to 10-11, carrying out a high-temperature and high-pressure hydrothermal reaction to obtain zinc oxide nanorods, and carrying out ball milling treatment on the zinc oxide nanorods, microcapsules, stearic acid and zirconium oxide balls under the protection of argon to obtain doped microcapsules; after raw materials are pretreated, the raw materials and a dispersing agent solution are added into a mixer respectively, spraying powder, a pretreated base body and the spraying powder are obtained after mixing treatment, spraying treatment is conducted on the surface of the base body through a plasma spraying method, and the self-lubricating aluminum coating is obtained after vacuum annealing treatment. Therefore, the obtained self-lubricating aluminum coating is low in friction coefficient, high in performance and excellent in self-lubricating property.

The invention discloses an enhanced tensile wear-resistant multi-twisted steel wire rope, which relates to the technical field of steel wire ropes, and structurally comprises a multi-twisted steel wire rope formed by twisting three sub-ropes in a left-to-right interactive manner, and each sub-rope is formed by twisting six stranded ropes in a right-to-right interactive manner; the aluminum-based carbon fiber composite core serves as the center of the stranded rope, and the gradient functional layer comprises six center steel wires on the inner layer, twelve micro-arc oxidation concave steel wires on the middle layer, eighteen graphene / zinc-aluminum coating convex steel wires on the outer layer and twelve phase change lubricating fiber bundles on the surface layer. The outer surface of the steel wire rope is sequentially coated with a self-repairing sealing layer containing repairing microcapsules, a boehmite / silane interface bonding layer and an Al2O3 / PEEK abrasion-resistant coating. The tensile strength and the structural stability are improved through a three-stage twisting process; the aluminum-based carbon fiber composite core and the gradient functional layer synergistically enhance core bearing, wear resistance and corrosion resistance; the phase change lubricating fiber bundles release lubricating components during friction, and damage repair is achieved through the self-repairing sealing layer; and the interface bonding layer and the wear-resistant coating strengthen the surface adhesive force and the wear resistance.

This invention discloses a corrosion-resistant aluminum-based multilayer coating on the surface of a sintered NdFeB magnet and its preparation method, comprising: pretreatment of the magnet; preparation of the aluminum coating: in the presence of an inert gas, after adjusting the pressure of the environment to a first preset value, depositing an aluminum coating on the pretreated sintered NdFeB magnet; preparation of the aluminum-based barrier coating: in the presence of a reactive gas, after adjusting the pressure of the environment to a second preset value, exciting the reactive gas into a high-density plasma, generating an aluminum-based barrier layer on the surface of the sintered NdFeB magnet with the deposited aluminum coating; repeating steps S200 and S300, followed by cooling, to complete the preparation of the corrosion-resistant aluminum-based multilayer coating on the surface of the sintered NdFeB magnet. This invention does not involve reactive sputtering, effectively avoiding the "palladium poisoning" phenomenon during the deposition process, and the prepared multilayer coating has excellent corrosion resistance.

The invention relates to the field of suspension plasma spraying, in particular to a long-service-life suspension plasma spraying thermal barrier coating based on a platinum-aluminum coating and a preparation method of the long-service-life suspension plasma spraying thermal barrier coating. The preparation method comprises the following steps: preparing a vertical crack or columnar-like structure ceramic layer on the surface of a platinum modified aluminide bonding layer with lower roughness by using suspension slurry prepared from fully-stable tetragonal phase yttrium oxide stabilized zirconium oxide powder and adopting suspension plasma spraying suspension, so as to obtain a thermal barrier coating system with long service life. The problems that in the prior art, due to stress existing between a ceramic layer prepared through plasma spraying and a low-roughness platinum modified aluminide bonding layer, cracks are continuously formed and expanded at an interface, and the service life of a thermal barrier coating system is short are solved. The long-life thermal barrier coating system can be prepared on the platinum modified aluminide bonding layer through suspension plasma spraying.

The present application relates to the manufacture of high-strength steel coated plate welded parts, in particular to a welding material, a high-strength steel workpiece, a laser welded joint and a manufacturing method thereof. The composition of the welding material satisfies the following conditions in terms of percentage by weight: C is greater than or equal to 0.5%, trace alloying elements are 0-0.36%, the content of Mn and Si is less than or equal to 2%, 6% is greater than or equal to 5C+Mn and is greater than or equal to 2.5%, and the rest is Fe and inevitable other elements; the trace alloying elements are at least one of Nb, V and Ti elements, and the content of Nb, V and Ti elements is less than or equal to 0.12%. The method does not need to remove the aluminum coating, utilizes the solid solution strengthening effect of C, and makes the volume fraction of lath martensite in the final weld after quenching greater than or equal to 90%. This scheme reduces the addition of alloying elements, reduces the cost and process control difficulty, avoids the formation of coarse carbides, improves the mechanical properties and stability of the joint, has high fracture strength and elongation, and realizes the double improvement of the strength and toughness and economy of the joint.

The invention discloses an intelligent zinc-aluminum coating quality monitoring method and system for a wind power blade bolt, and solves the problems that internal defects of a coating cannot be found in an early stage and predictive maintenance cannot be realized in the prior art. The method comprises the following steps: acquiring multi-source monitoring data of coating internal defects, interface micro-strain and corrosion states through a terahertz imaging unit, a pre-embedded FBG sensing unit and a microelectrode array ECN acquisition unit which are integrated on an inspection robot; after carrying out local preprocessing by utilizing an edge computing gateway, synchronizing data to a digital twinborn analysis platform deployed with a coating state intelligent evaluation model so as to output a current health state grade and residual life prediction of the coating; finally, a maintenance decision suggestion is automatically generated or an equipment control instruction is triggered based on the result, closed-loop monitoring from state sensing to intelligent execution is formed, and the system comprises a corresponding hardware module and a software platform and is used for achieving the method.

Disclosed is a laser welded joint (2). When two steel plate base materials are butt-jointed for laser welding, a laser welding solder is added to a molten pool, thereby forming an initial weld seam, and the initial weld seam is quenched to form the laser welded joint (2), wherein at least one steel plate is a steel plate having an aluminum coating or an aluminum alloy coating; the volume fraction of lath martensite (21) in the laser welded joint (2) is not less than 90%, the average mass fraction of Mn is not less than 3.2%, the average mass fraction of Al is not higher than 1.4%, and the average mass fraction of C is lower than the C content of the steel plate base materials; and the height h1 of a reinforcement on the front face of a final weld seam formed by the laser welded joint (2) and the height h2 of a reinforcement on the back face of the final weld seam do not exceed 0.4 mm.

The aluminum fluoride coated nano silicon material is prepared from nano silicon powder, aluminum nitrate nonahydrate, ammonium fluoride, absolute ethyl alcohol and deionized water, and an aluminum fluoride coating layer and a nano silicon negative electrode material are compounded to form an aluminum fluoride coated nano silicon material structure. The aluminum fluoride coating layer on the surface can be converted into a fast ion conductor in the battery circulation process, so that the lithium ion diffusion rate is increased, and migration of lithium ions between the nanometer silicon negative electrode and the electrolyte is promoted. Under the coating protection effect of the coating layer, the volume expansion of the nano-silicon material is improved, the voltage attenuation speed is slowed down, the cycling stability is greatly improved, the cycling performance of the nano-silicon negative electrode material is improved, and silicon particle breakage, material pulverization and falling off from a pole piece are avoided. The coating amount of the aluminum fluoride coating layer is compared, and the optimal coating amount is given. The method has the advantages of low cost and high controllability.

According to the high-strength long-service-life steel wire rope special for the port, the first steel wire strand, the second steel wire strand and the third steel wire strand are all formed by weaving and twisting galvanized stainless steel wires with the outer surfaces plated with chromium-free zinc-aluminum coatings, and the corrosion resistance of the steel wire rope is remarkably improved while it is guaranteed that the steel wire rope has the high strength performance; the service life of the steel wire rope is obviously prolonged. Lubricating grease is stored in the oil storage rope core of the first filling rope, the oil storage cotton of the second filling rope and the composite fiber strands, so that when the steel wire rope is impacted or bent, the oil storage rope core in the center of the steel wire rope can slowly release the lubricating grease; the composite fiber strands are arranged on the rope core, oil storage cotton on the outer side of the rope core and lubricating grease in the composite fiber strands cooperate to lubricate the rope core and the steel wire strands of the outer strand layer, lubricating films are formed on the surfaces of the steel wire strands, and therefore the friction coefficient between the steel wire strands is reduced, the corrosion resistance is further enhanced, and the steel wire rope has the long service life and the strength stability is kept.

The invention relates to an acrylic acid-organic silicon dual-modified polyester aqueous dispersion, which is prepared from the following components in percentage by weight: 1 to 5 parts of hexahydrophthalic anhydride, 10 to 15 parts of isophthalic acid, 1 to 5 parts of adipic acid, 15 to 20 parts of neopentyl glycol, 0.5 to 1 part of unsaturated binary acid, 1 to 2 parts of reflux solvent, 5 to 10 parts of acrylate mixed monomer, 0.5 to 1 part of acrylic acid, 5 to 10 parts of cosolvent, 1 to 5 parts of organic silicon modifier, 0.5 to 5 parts of dimethylethanolamine neutralizer and 40 to 45 parts of deionized water. The acrylic acid and the organic silicon are used for modifying the polyester at the same time, the weather resistance, the hydrolysis resistance and the adhesive force are remarkably improved while the high flexibility of the water-based polyester is kept, the synthesized water-based polyester dispersion can be used for preparing high-performance water-based coil steel coating or coil aluminum coating or other water-based amino coating with VOC smaller than or equal to 100 g / L, and good comprehensive performance is achieved.

The application relates to the technical field of zinc-aluminum coating detection, in particular to a method for rapidly detecting the contents of Zn, Al and Si elements in a zinc-aluminum coating; the method comprises the following steps: ultrasonic cleaning of the zinc-aluminum coating to be detected to obtain a pretreated sample; glow surface analysis of the pretreated sample by using a glow spectrum method, drawing of a horizontal and vertical coordinate graph, and obtaining of an Fe-h curve graph, a Zn-h curve graph, an Al-h curve graph and a Si-h curve graph; according to the curve graphs, the total mass of Zn, Al and Si is respectively calculated; the thickness of the zinc-aluminum coating to be detected is calculated by taking the Fe-h curve graph as a standard curve; according to the curve graphs and the thickness of the zinc-aluminum coating to be detected, the average mass of Zn, Al and Si is respectively obtained; and according to the average mass and the total mass, the average mass fraction of Zn, Al and Si is obtained. The method can avoid the substrate effect of the zinc-aluminum coating in the detection process, so that the accuracy of the zinc-aluminum coating detection is improved.

The utility model relates to a lightweight low-cost coaxial cable for a vehicle, which sequentially comprises a wire core, a metal wrapping tape, a shielding layer and a sheath layer from inside to outside, and the metal wrapping tape is a layer of double-sided metal wrapping tape wrapped outside the wire core; the shielding layer is formed by weaving an aluminum coating basalt fiber shielding weaving layer on the surface of the metal wrapping tape, and 24 ingots and 10 aluminum coating basalt fiber conductors with the monofilament diameter being 0.23 [mu] m are adopted to be evenly attached to the surface of the metal wrapping tape. The wire core is composed of a 7 / 0.26 bare copper conductor and a foaming PP insulating layer, and the outer diameter of the wire core is 2.02-2.18 mm. And the sheath layer is made of PVC (Polyvinyl Chloride). The utility model provides a vehicle coaxial cable which is light in weight and low in cost.

The invention relates to a high-dispersion, high-gloss and high-covering-power printing ink titanium dioxide inorganic coating method, and belongs to the field of titanium dioxide post-treatment production. The method comprises the following steps: a, selecting a primary product; b, pulping and dispersing the primary product; c, inorganic zirconium oxide coating; d, inorganic aluminum oxide film coating is conducted, and aluminum oxide film layer deposition is conducted through a two-step method and is conducted under the acid condition and the alkaline condition respectively; and e, drying, crushing and adding an organic treatment agent. According to the method, a three-step zirconium-aluminum coating method is adopted to realize accurate modification of titanium dioxide surface properties. The compact alumina film layer under the acidic condition further improves the glossiness and weather resistance of the product, and the loose porous alumina film layer under the alkaline condition provides more surface hydroxyl groups, so that the compatibility of the product and a printing ink system is improved. The problems that the titanium dioxide product prepared by the existing method is difficult to improve the compatibility with an ink system and the dispersibility while ensuring key application performance indexes of glossiness, whiteness and covering power are solved.

The utility model provides coated glass, which relates to the technical field of coated glass and comprises a glass substrate, and a first titanium oxide coating layer, a zinc oxide aluminum coating layer and a second titanium oxide coating layer which are sequentially stacked on the surface of the glass substrate, wherein the first titanium oxide coating layer is made of anatase type titanium oxide, and the second titanium oxide coating layer is made of anatase type titanium oxide. The coated glass provided by the utility model can accelerate the fading of methyl blue and degrade pollutants such as formaldehyde under the irradiation of ultraviolet light.

Embodiments of the present disclosure generally relate to methods for etching a carbon hard mask to have improved etching selectivity and profile control. In some embodiments, a method is provided for processing a carbon hard mask layer, which includes positioning a workpiece within a process area of ​​a processing chamber, wherein the workpiece has a carbon hard mask layer positioned on or throughout the underlying layer, and processing the carbon hard mask layer by exposing the workpiece to a sequential penetration synthesis (SIS) process to produce an alumina-carbon hybrid hard mask denser than the carbon hard mask layer. The SIS process includes exposing the carbon hard mask layer to an aluminum precursor to penetrate the carbon hard mask layer with the aluminum precursor, purging and removing gaseous residues, exposing the carbon hard mask layer to an oxidizing agent to penetrate the carbon hard mask layer with the oxidizing agent to produce an alumina coating positioned on the inner surface of the carbon hard mask layer, and purging the process area to remove gaseous residues.

The application discloses a compressor blade phosphate aluminum coating precision grinding and polishing path generation method and system based on point cloud data processing, which comprises the following steps: obtaining point cloud data of the coating surface of the compressor blade by using a three-dimensional scanning device, filtering and denoising the point cloud data, and pre-processing the data, and aligning the pre-processed point cloud data with a robot machining reference coordinate system; based on the local curvature of the point cloud, the point cloud model is divided into multiple layers of contour slices by using a curvature adaptive slicing algorithm, wherein the slicing interval is negatively correlated with the local curvature radius; the contour points of each layer of slices are B-spline fitted to generate a continuous grinding and polishing path curve; the robot executes the grinding and polishing path curve, and integrates a real-time thickness detection device; when the thickness measurement value deviates from a preset threshold value, closed-loop feedback control is performed, and the grinding and polishing path and / or grinding and polishing parameters are dynamically compensated. The application has the advantages of high machining precision, high efficiency, high consistency and the like.

The invention belongs to the technical field of semiconductor aluminum oxide coatings, and relates to a low-temperature curing high-temperature-resistant insulating hole sealing agent which is specifically prepared from the following components in parts by mass: 60-80 parts of epoxy resin, 1-5 parts of filler, 5-10 parts of solvent, 10-20 parts of curing agent and 1-5 parts of hindered phenol antioxidant. The high-temperature-resistant insulating hole sealing agent overcomes the problem that an existing hole sealing agent can be cured only under high-temperature adjustment, and in practical application, the hole sealing agent can be cured at low temperature, so that a coating is more compact and has good insulating performance, the resistance is improved, and the coating is prevented from being broken down in the using process of a product.

The invention discloses a preparation method of a steel-based alternating-current composite conductor, the structure of the steel-based alternating-current composite conductor is as follows from outside to inside: the first layer is a copper coating layer, the second layer is an aluminum coating layer, and the innermost layer is a steel core, and the steel-based alternating-current composite conductor has the beneficial effects that a composite material with relatively high strength, good plasticity and conductivity is obtained, and the required performance can be obtained through composite preparation, deformation and aging processes; the copper-aluminum alloy material has excellent conductivity of copper, also has the characteristic of light weight of aluminum, has high strength, high modulus and low relaxation of steel and good conductivity and atmospheric corrosion resistance of copper, achieves the purposes of excellent performance and low cost, and can be widely applied to the fields of power transmission, electronic equipment, communication systems, new energy automobiles, photovoltaic power generation and the like.

The invention provides a method for judging the uniformity of a titanium dioxide aluminum coating layer. The method comprises the following steps: (1) scanning a plurality of energy spectrum points on an aluminum coating titanium dioxide sample; (2) calculating the mass ratio, the average value and the standard deviation of the aluminum element and the titanium element in each scanning point; (3) comparing the ratio difference of the aluminum element and the titanium element at different points; and when the standard deviation is less than 0.005, the titanium dioxide is uniformly coated by the aluminum coating film layer. According to the method, the uniformity of the aluminum coating layer can be quantitatively and effectively judged, so that a direction is provided for improving or enhancing the aluminum coating effect.

The present application relates to titanium dioxide coating technical field, especially to a kind of titanium dioxide continuous flow general coating method and device, four reaction units are installed and connected from left to right in series, and the control of the installation and connection position of first metering pump, second metering pump, third metering pump, fourth metering pump, fifth metering pump, sixth metering pump is combined, so that the accurate control of material feeding position and feeding amount, in turn, titanium dioxide silicon film layer and aluminum film layer process are effectively controlled, and the control of the quality of silicon film layer, aluminum film layer coating in continuous flow process can be realized, the control of temperature and other process parameters in continuous flow reaction system is combined, silicon coating rate is promoted to reach 94% or more under 90-95 ℃, compared with gap method silicon coating rate 80.37%, about 14 percentage points are improved;Aluminum coating rate reaches 97% or more, compared with gap method aluminum coating rate 91.26%, about 6 percentage points are improved, improve titanium dioxide coating effect.

To provide a lithium secondary battery having achieved low resistance and improved life characteristics at high voltage and high temperature while having realized a positive electrode active material exhibiting high stability at the high voltage and a high capacity.SOLUTION: A positive electrode active material comprises: a first positive electrode active material comprising a first lithium cobalt-based oxide doped with aluminum and magnesium; and a second positive electrode active material comprising a second lithium cobalt-based oxide doped with aluminum and magnesium. An average particle diameter of the second positive electrode active material is smaller than an average particle diameter of the first positive electrode active material. The first positive electrode active material and the second positive electrode active material each include an aluminum coating layer located on each particle surface. The aluminum coating layer of the first positive electrode active material is in a shell form continuously wrapping each particle surface. A content of aluminum relative to 100 at % of a total of cobalt and aluminum measured by EP-EDS on a surface of the first positive electrode active material is 6 at% to 10 at%.SELECTED DRAWING: Figure 1

The utility model relates to the technical field of flexible circuit boards, in particular to a high-bendability flexible circuit board, which comprises a copper foil, a first adhesive layer, an aluminum honeycomb core, a second adhesive layer and a PI (Polyimide) layer, the upper and lower sides of the copper foil are fixedly connected with the aluminum honeycomb core through the first adhesive layer, so that the copper foil can be matched with the bending of the circuit board, the fracture resistance of the circuit board is improved, and the service life of the circuit board is prolonged. The bending life of the flexible circuit board is prolonged, through the aluminum honeycomb core, not only can the pressure resistance and fracture resistance of the flexible circuit board be improved, but also the heat dissipation efficiency of the copper foil can be improved, the flexible circuit board is convenient to use, the composite insulation heat conduction coating and the insulation layer are arranged to play a role in isolating honeycomb aluminum electric conduction from the circuit layer, the short circuit risk is avoided, and the service life of the flexible circuit board is prolonged. The intermediate layer can improve the transfer efficiency of heat from the circuit layer to the honeycomb aluminum, the surface layer is hydrophobic and wear-resistant, the outdoor service life is prolonged, and the comprehensive performance of the ultrathin honeycomb aluminum coating is remarkably improved through the composite insulating heat-conducting coating.

The application discloses a carbon dioxide assisted dehydrogenation catalyst and a preparation method thereof. The catalyst comprises a honeycomb matrix, a modified silicon-aluminum coating on the surface of the honeycomb matrix and a first active component Pt, and the coating contains a group VIB metal carbide. Characteristic peaks representing the group VIB metal carbide appear at positions of 36°, 42°, 61° and 74° in an XRD spectrum, and lattice shift occurs. The preparation method comprises the following steps: (1) dissolving a group VIB metal precursor and / or an auxiliary metal salt in water to obtain solution A; (2) mixing alumina powder, pseudo-boehmite, a surfactant, a silicon source and the solution A to obtain a slurry; (3) loading the slurry on the honeycomb matrix, drying and roasting to obtain a carrier; and (4) loading Pt on the carrier to obtain the catalyst. The catalyst has a double active center synergistic cooperation function, has a double function of activating carbon dioxide and alkane dissociation adsorption, and has a wide application prospect in the fields of selective oxidation, oxidative dehydrogenation and the like.

The application provides a composite ceramic coating spraying processing device, which can form an alumina coating and a silicon oxide coating through first spraying, can form an aluminum fluoride coating through second spraying, and can form a yttrium fluoride coating through third spraying; the three layers of coatings are sequentially distributed from inside to outside, forming a plasma-resistant ceramic coating with a multilayer composite structure, which enriches the structure of the composite ceramic coating and improves the overall protection capability against plasma etching, so that safety accidents can be avoided. The application solves the problems of single structure and poor protection capability of the traditional composite ceramic coating.

The invention provides a high-strength and high-toughness titanium-aluminum coating and a preparation method and application thereof.The preparation method comprises the following steps that A, first mixed powder and second mixed powder are laid on the surface of a titanium alloy component layer by layer, and a prefabricated titanium-aluminum coating is obtained; the first mixed powder comprises Ti powder and TC4 powder; the second mixed powder comprises Al powder and TC4 powder; and (B) pulse current treatment is conducted on the prefabricated titanium-aluminum coating, and the high-strength and high-toughness titanium-aluminum coating is obtained. According to the method, gradient thermal expansion coefficient matching and interface stress reduction are achieved by arranging the multiple TC4 alloy transition layers, pulse instantaneous energy of pulse current treatment can enable local micro-areas of the coating to be remelted, grain growth is restrained, submicron-order equiaxed crystals are obtained, dislocation slippage is induced by electromagnetic force, residual stress is released, and the thermal expansion coefficient of the coating is reduced. And in addition, the in-situ exothermic reaction promotes mutual diffusion of elements, a metallurgical bonding interface is formed, and the strength and toughness of the coating are improved.

The invention belongs to the technical field of photoluminescent materials, and particularly relates to a long-afterglow material, a preparation method and application thereof, and a cement-based light storage material. According to the invention, through the synergistic effect of the rigid framework design of the crystal structure and the amorphous silicon-aluminum coating layer, the problem of hydrolysis failure of the long afterglow material is fundamentally solved. Specifically, a rigid lattice frame constructed by [AlO4] tetrahedrons of the long afterglow material and Sr < 2 + > can significantly reduce the surface hydroxyl adsorption activity by reducing the oxygen vacancy concentration; the coated compact amorphous silicon-aluminum layer effectively blocks water molecule permeation, so that the interface bonding strength can be enhanced, particle aggregation is prevented, and the mixing uniformity is improved by enhancing chemical bonds; the crystal structure of the material is kept stable, the hydrolysis resistance is improved, the afterglow time is prolonged, the compressive strength is improved, and high-performance light storage integration that the afterglow brightness attenuation rate is smaller than or equal to 5% after thousands of light storage cycles is achieved.

The invention provides an aluminum-doped nickel-cobalt-manganese ternary precursor and a preparation method and application thereof.According to the aluminum-doped nickel-cobalt-manganese ternary precursor, the relative molar content of manganese and aluminum in the aluminum-doped nickel-cobalt-manganese ternary precursor is increased in a gradient mode from inside to outside along the particles of the aluminum-doped nickel-cobalt-manganese ternary precursor, and the relative molar contents of the nickel element and the cobalt element are reduced in a gradient manner. According to the aluminum-doped nickel-cobalt-manganese ternary precursor provided by the invention, the internal nickel concentration is high, so that the high energy density is ensured; the relative molar contents of manganese and aluminum elements are increased in a gradient manner from inside to outside, so that a high-concentration manganese-aluminum coating layer can be formed on the surface of the precursor, the phenomena of crushing and internal collapse in the sintering process are relieved, and the thermal stability of the positive electrode material is further ensured; the doping of aluminum with relatively high concentration close to the surface can also relieve the surface crack propagation phenomenon, and the manganese with relatively high concentration can also ensure high structural stability.

The invention discloses a method for preparing a high-density aluminum oxide coating by using a suspension plasma spraying technology, and relates to the technical field of suspension plasma spraying, and the method comprises the following steps: 1, carrying out sand blasting treatment on an upper electrode plate; sequentially carrying out high-pressure washing, compressed air blow-drying and drying operations; 2, the upper electrode plate is placed in a sulfuric acid solution to be subjected to hard anodic oxidation treatment; 3, a dry ice sand blasting process is adopted for pretreating the hole periphery area of the surface of the steel plate; step 4, injecting the aluminum oxide suspension into high-energy plasma flame flow through plasma spraying equipment; the aluminum oxide particles in the suspension are rapidly molten in the flame flow, then collide with the surface of the upper electrode plate at a high speed along with the plasma flow, and are rapidly cooled and solidified to form a layer of high-compactness aluminum oxide coating on the surface of the upper electrode plate. By optimizing the coating preparation process and parameters, the compactness and corrosion resistance of the coating are improved, the service life of equipment parts is prolonged, and the cost of a production enterprise is reduced.

This invention relates to the field of battery materials technology, specifically to an alumina coating, its preparation method, and its application. The alumina coating includes a positive electrode coating slurry formed on the surface of a positive electrode and / or a negative electrode coating slurry formed on the surface of a negative electrode. The positive electrode coating slurry includes nano-alumina powder, a first solid electrolyte, a first film-forming aid, a first binder, a first dispersant, and a first solvent. The negative electrode coating slurry includes nano-alumina powder, a second solid electrolyte, a second film-forming aid, a second binder, a second dispersant, and a second solvent. The preparation method includes: providing positive / negative electrode sheets to be coated; preparing positive / negative electrode coating slurries of a preset viscosity; and applying the slurries to the electrode surface using an atomization spraying method to form an alumina coating. This invention significantly improves the adhesion between the coating and the electrode, interface uniformity, and ionic conductivity by combining differentiated positive and negative electrode formulations with a semi-dry atomization spraying process.

The application discloses a rare earth modified transition layer material, which comprises the following raw materials in parts by weight: 10-100 parts of metal lanthanum cerium, 6000-7000 parts of metal iron, 1100-1300 parts of boron iron, 100-500 parts of silicon iron and 6000-7000 parts of metal nickel. The preparation method comprises the following steps: (1) weighing the raw materials and adding them into a vacuum induction melting furnace; (2) vacuumizing, filling high-purity argon, increasing temperature and keeping temperature; (3) vacuumizing, filling high-purity argon, increasing temperature, keeping temperature after all the metals are melted; (4) pouring into a mold and cooling; and (5) preparing spherical alloy spraying powder, thereby obtaining the rare earth modified transition layer material. The use method comprises the following steps: adopting plasma spraying process, controlling spraying power to be 15-32 KW, voltage to be 40-55 V, current to be 360-560 A, gas flow to be 25-45 L / min and spraying distance to be 10-25 cm. The rare earth modified transition layer material has high sphericity and good fluidity, the obtained coating has a bonding strength reaching the level of nickel-coated aluminum coating, and the hardness and wear resistance of the coating are much higher than those of the nickel-coated aluminum coating.