3430 results about "Metal substrate" patented technology

The invention relates to a self-repairing anti-corrosion water-based paint applied to the field of paint compositions, which is prepared by the following steps: firstly, preparing a self-repairing microcapsule encapsulated with a self-repairing agent and a corrosion inhibitor, and then uniformly dispersing the self-repairing microcapsule into water-based base resin under a low-shear condition; the prepared coating can be applied to the surface of a pretreated metal base material in a brush coating, spray coating or blade coating mode and the like, a micron-sized anti-corrosion coating is formed after curing, under the normal condition, the microcapsules are placed in the coating in a standing mode and do not work, when scratches occur, the self-repairing microcapsules are broken and play a role, and the corrosion resistance of the coating is improved. The self-repairing agent rapidly fills and heals the damaged part of the coating to form a new barrier layer, the corrosion inhibitor forms a protective film on the exposed metal surface to inhibit the corrosion reaction, and the synergistic mechanism can effectively delay the corrosion diffusion of the scratched part, so that the protection integrity of the coating on the base material is maintained, and the service life of the coating is prolonged. And the coating can be suitable for metal structure protection in severe environments such as ocean climate, high-humidity and high-salt environments, acid rain regions, chemical environments and the like.

The invention relates to the field of precise driving and positioning, in particular to a multi-mode bidirectional movement rotary piezoelectric motor. Comprising a base, a rotor mechanism, a stator mechanism and a pre-tightening mechanism, the stator mechanism comprises a flexible metal oscillator connected to the pre-tightening sliding block. The flexible metal oscillator comprises a diamond frame of a sheet structure and an elastic metal substrate connected between a set of opposite angles in the diamond frame. The two groups of piezoelectric ceramic pieces are symmetrically fixed on the same side surface of the elastic metal substrate; the motor further comprises a first driving foot and a second driving foot which are fixed to the flexible metal vibrator, the first driving foot and the second driving foot are fixed to the two adjacent corners of the rhombic frame body respectively, and the first driving foot and the second driving foot make contact with the inner ring of the rotor bearing. According to the technical scheme, through the asymmetric structural design, the rhombic flexible metal oscillator can generate two working modes, so that the motor realizes bidirectional rotation under the condition that the voltage and the structure are not changed.

The invention discloses a dual-frequency / broadband switchable dynamic tuning metamaterial terahertz absorber which comprises M * N terahertz absorption units of a multi-layer structure, the M * N terahertz absorption units of the multi-layer structure are distributed in an M * N two-dimensional mode, and M and N are positive integers. Each terahertz absorption unit with the multi-layer structure comprises a metal substrate, a dielectric layer and a resonance layer which are sequentially arranged from bottom to top; the dielectric layer and the metal substrate are square and have the same side length; the resonance layer comprises a single-layer graphene layer with a hollow cross, and a solid cross-shaped vanadium dioxide layer is embedded in the hollow part of the single-layer graphene layer with the hollow cross; and the appearance of the single-layer graphene layer with the hollow cross is cross-shaped. The absorber can be dynamically tuned, has the characteristic of polarization insensitivity, and can keep stable absorption in an incidence angle range of 0-60 degrees. The invention further discloses a preparation method of the dual-frequency / broadband switchable dynamic tuning metamaterial terahertz absorber.

Disclosed is a cooling system (104) and method for a metal processing system (100). The cooling system (104) includes a cooling header (114), an exhaust system (118), a temperature sensor (128), and a controller (130). The cooling header (114) selectively dispenses a coolant onto a metal substrate (110), and the exhaust system (118) removes heated coolant from the metal substrate (110). The temperature sensor (128) is downstream from the cooling header (114) and detects a temperature profile of the metal substrate (110) across a width of the metal substrate. The controller (130) is communicatively coupled to the cooling header (114) and the temperature sensor (128), and the controller (130) controls the cooling header (114) based at least on a detected temperature profile.

The utility model provides a high-density LED support, which comprises a metal substrate and a plastic support, the metal substrate comprises a substrate frame, left pads, right pads and cut ribs which are integrally arranged, the substrate frame is provided with a plurality of groups of cavity areas which are arranged in a matrix, the left pads and the right pads are alternately arranged in a group of cavity areas along the transverse direction, and the cut ribs are arranged on the left pads and the right pads. The plastic support is fixed to the right ends of the left bonding pads and the left ends of the right bonding pads, the left ends of the leftmost set of left bonding pads are connected with the substrate frame, the right ends of the rightmost set of right bonding pads are connected with the substrate frame, the right ends of the adjacent right bonding pads are connected with the left ends of the left bonding pads, and the connection positions are cut-off positions. The LED support has the advantages that not only can the arrangement density of the LED support be improved, but also the waste discharge rate and the manufacturing cost can be reduced.

The invention provides a hydrogen-containing amorphous carbon film with long wear life and a preparation method thereof, and belongs to the field of composite material preparation. The a-C: H thin film with the long wear life comprises a substrate, and a Ti transition layer, a TiN hydrogen resistance layer, a TiCHx hydrogen storage layer, a Ti / C / H transition layer and a hydrogen-containing a-C layer which are formed on the surface of the substrate from bottom to top. Through connection transition between the Ti transition layer and the metal substrate, strong combination between the hydrogen-containing DLC film and the metal substrate is realized. By depositing the TiN hydrogen blocking layer, hydrogen atoms in the TiCHx hydrogen storage layer are prevented from diffusing and losing towards the direction of the substrate. By depositing the TiCHx hydrogen storage layer, hydrogen atoms are fixed and stored by using the hydrogen storage characteristic of Ti, and the hydrogen atoms are provided for the surface hydrogen-containing a-C layer in the working process of the thin film. By depositing the Ti / C transition layer, connection transition between the TiCHx hydrogen storage layer and the hydrogen-containing a-C layer is achieved, compatibility is improved, and good combination is achieved.

The invention discloses a manganese oxide monolithic metal foam catalyst and a preparation method and application thereof, and belongs to the technical field of air purification. A manganese acetate solution is used as an electrolyte, a three-electrode system is used for carrying out electro-deposition on a pretreated metal foam substrate, and a product obtained after electro-deposition is washed and dried to obtain the manganese oxide monolithic metal foam catalyst. The preparation method of the manganese oxide monolithic metal foam catalyst disclosed by the invention is simple to operate, not only is suitable for metal substrates in any shape, but also can ensure that the active components of the manganese oxide are firmly loaded and uniformly dispersed on the substrate; the catalyst has the advantages of excellent activity, good conductivity, industrial application facilitation and the like. The manganese oxide monolithic metal foam catalyst provided by the invention still has excellent long-time use stability and water resistance under a high-humidity condition.

The invention provides a hyperbranched polysiloxane coating corrosion inhibitor and a preparation method thereof, a hyperbranched polysiloxane epoxy anticorrosive paint and a preparation method and application thereof. The hyperbranched polysiloxane coating corrosion inhibitor is prepared by catalytic reaction of p-dimethylaminobenzaldehyde and small molecular silane in an alcoholic solution. The coating comprises 30-50 parts of epoxy resin, 20-35 parts of a hyperbranched polysiloxane coating corrosion inhibitor, 5-10 parts of an active diluent, 2-2.5 parts of a silane coupling agent, 15-30 parts of filler, 1.5-2.5 parts of an auxiliary agent and 15-20 parts of a curing agent. Compared with the prior art, an imine group in hyperbranched polysiloxane and a metal substrate form a stable complex, the stable complex is adsorbed on the metal surface to form a protective film, the erosion rate of a corrosive medium to the metal substrate is effectively reduced, the corrosion resistance of a coating is improved, meanwhile, the coating prepared by adopting the reactive diluent is high in solid content and good in corrosion resistance, and the service life of the coating is prolonged. VOC emission in the paint film curing process is low.

Methods and systems for coating metal substrates are provided. The methods and systems include sequential application of low flow and high flow powder coatings followed by a single heating step to provide a cured coating. The methods and systems include a marker that allows coating uniformity to be monitored and assessed during application. The described methods provide coatings with optimal surface smoothness and edge coverage.

The invention relates to environment-friendly hydrophobic ink and a preparation method thereof, and belongs to the technical field of water-based ink. A copolymerization modifier capable of being combined in a water-based polyacrylate emulsion in an initiation polymerization mode in the stage of preparing the modified water-based polyacrylate emulsion is prepared, and an o-hydroxy aromatic ketone structure in the copolymerization modifier can endow water-based ink with lasting ultraviolet absorption performance; the trifluoromethyl structure can reduce the surface energy of the water-based ink, and the benzimidazole ring structure can form stable coordinate bonds with metal ions, so that the bonding performance of the water-based ink and a metal substrate is enhanced; when the copolymerization modifier is used for modifying the water-based polyacrylate emulsion, the long-term performance, the hydrophobic and oil-resistant performance and the adhesion performance on the surface of a metal base material of the finished water-based ink can be effectively improved.

The invention discloses a preparation method and device for an abrasive grain texturing diamond grinding wheel. According to an existing diamond grinding wheel, diamond abrasive particles are bonded through a binder, and ideal surface micro-texture morphology is difficult to machine. According to the method, the diamond covering layer is formed on the outer surface of the metal matrix through chemical vapor deposition, and laser ablation is carried out, so that the regular diamond micro-texture morphology is machined, and the grinding quality is improved. Moreover, the diamond covering layer is formed on the surface of the metal matrix matched with the ground surface through chemical vapor deposition, and the diamond grinding wheel with the complex surface appearance is obtained, so that the grinding efficiency and precision of the complex surface are improved; meanwhile, the diamond covering layer formed through chemical vapor deposition is of an integrated structure on the molecular level, and compared with a conventional grinding wheel with each abrasive particle being of an independent structure, the abrasion resistance of the diamond grinding wheel can be greatly improved, and the problem that the grinding precision is reduced due to the fact that the grinding wheel is shrunk is relieved and even eliminated.

A welding packaging structure of a thick film heater comprises two metal substrates which are parallel and opposite to each other, the edges of the two metal substrates are fixedly packaged, a thick film heating circuit is printed on the inner surface of each metal substrate, a continuous step is arranged on the whole edge of one metal substrate, and the step is opposite to the surface edge of the other metal substrate and is welded and packaged with the surface edge of the other metal substrate. According to the utility model, the design is reasonable, the continuous steps are arranged on the whole edges of the metal substrates, and the edges of the two metal substrates can be attached or keep a proper small gap during welding, so that the automatic welding of a machine can be completely carried out, the production efficiency is greatly improved, and the welding and packaging quality is high.

The invention relates to an SPnT surface-mounted microwave mechanical switch, and relates to the technical field of microwave switches, the microwave mechanical switch comprises a metal substrate, a plurality of micro coaxial transmission lines are arranged in the metal substrate, the length direction of the micro coaxial transmission lines is arranged along the thickness direction of the metal substrate, and the two ends of the micro coaxial transmission lines penetrate through the metal substrate; the radio frequency communication mechanism comprises a plurality of radio frequency reeds, one radio frequency reed is correspondingly arranged between every two adjacent micro coaxial transmission lines, the radio frequency reeds and the metal substrate are arranged in parallel at intervals, and linkage pieces are arranged on the radio frequency reeds; the electromagnetic driving mechanisms and the radio frequency reeds are arranged in a one-to-one correspondence mode, the electromagnetic driving mechanisms are connected with the corresponding linkage pieces, and the electromagnetic driving mechanisms are used for driving the radio frequency reeds to be in lap joint with the two corresponding micro-coaxial transmission lines. The microwave mechanical switch provided by the invention can be suitable for application scenes with relatively high requirements on high-frequency performance.

The invention discloses a super-smooth, anti-corrosion and anti-coagulation hydrogel composite coating on the surface of a medical instrument as well as a preparation method and application of the super-smooth, anti-corrosion and anti-coagulation hydrogel composite coating, and the super-smooth, anti-corrosion and anti-coagulation hydrogel composite coating is a surface hydrogel composite coating formed by taking N-(3, 4-dihydroxyphenethyl)-2-benzoylbenzamide (BPDA) as a primer and grafting a hydrophilic polymer on the primer. BPDA is deposited on the surface of the substrate, then hydrophilic monomer surface graft polymerization is initiated by light, and a hydrogel coating is constructed on the surface of the BPDA substrate. The BPDA primer provides excellent corrosion resistance, the corrosion rate of a metal substrate is effectively reduced, and benzophenone derivatives with photoreaction activity on BPDA molecules can mediate firm combination of the hydrogel layer; after meeting water, a stable and compact hydrated layer is formed, the super-lubricating property is achieved, adhesion of protein and cells can be remarkably inhibited, and thrombus formation is effectively prevented. The anti-corrosion and anti-blood coagulation coating has excellent anti-corrosion and anti-blood coagulation properties, and is widely applicable to anti-blood coagulation and anti-corrosion surface modification in the fields of medical instruments and the like.

The invention discloses a NiCrAl structured catalyst as well as a preparation method and an application method thereof. The catalyst contains NiCrAl layered double hydroxides (NiCrAl-LDHs) and a metal substrate, the NiCrAl-LDHs vertically grow on the surface of the metal substrate in situ, nickel ions, chromium ions and aluminum ions in the NiCrAl-LDHs structure come from the metal substrate, and the preparation method comprises the following steps: dissolving urea in water to prepare a urea aqueous solution; and putting the metal substrate into the urea aqueous solution, and carrying out hydrothermal reaction to obtain the composite material. The application method of the catalyst comprises the following steps: introducing current into the catalyst in a reaction atmosphere, and driving the catalytic reaction by using Joule heat generated by the current. The NiCrAl structured catalyst provided by the invention has the characteristics of simple preparation method, less chemical reagent dosage, excellent catalytic performance, easiness in batch production and the like, and is very suitable for application of electrothermal catalysis.

The invention discloses a preparation method of a metal organic framework modified fluorine-free super-amphiphobic coating, and belongs to the technical field of super-amphiphobic coatings. According to the technical scheme, the method comprises the steps of preparation and modification of a metal organic framework and formation of a fluoride-free super-amphiphobic coating. Adding a metal oxide and nano silicon dioxide particles into a polyacrylic acid solution to form spherical particles; enabling the spherical particles to react with imidazole ligands to obtain metal organic framework particles with porous spherical structures, and wrapping nano silicon dioxide particles in the metal organic framework particles; modifying the metal organic framework particles by using a silane coupling agent; the preparation method comprises the following steps: firstly, attaching modified metal organic framework particles to the surface of a metal matrix, then attaching fluorine-free alkyl silane to the surface of the metal matrix, and heating and curing to obtain the fluorine-free super-amphiphobic coating. The fluorine-free super-amphiphobic coating is applied to the aspect of a metal surface super-amphiphobic coating, and the problems that an existing fluorine-free super-amphiphobic coating is poor in oleophobic and hydrophobic performance and poor in durability are solved.

The invention discloses a silicon carbide power module packaging structure with low thermal resistance and low stress, and belongs to the technical field of semiconductor devices. The packaging structure comprises a metal substrate; the insulating ceramic layer is arranged on the metal substrate; the circuit layer is arranged on the insulating ceramic layer; the lower surface of the silicon carbide chip is connected with the circuit layer through a first interface layer; the composite heat dissipation stress buffer layer is arranged on the upper surface of the silicon carbide chip through a second interface layer; the copper clamp is connected with the upper surface of the composite heat dissipation stress buffer layer through a third interface layer; and the composite heat dissipation stress buffer layer is made of a copper-graphite composite material. According to the invention, the junction temperature of the silicon carbide chip can be greatly reduced, the overall thermal resistance is reduced, the surface stress of the chip is reduced, the warping phenomenon of the chip in the working process is effectively improved, and the long-life reliability of the power module under the long-term thermal cycle working condition is ensured.

Various embodiments of the present disclosure are directed towards an integrated chip (IC). The IC includes a substrate. The substrate includes a metal layer, a device layer disposed over the metal layer, and an insulating layer disposed vertically between the metal layer and the device layer. A semiconductor device is disposed on the device layer. An interlayer dielectric (ILD) layer is disposed over the semiconductor device and the substrate.

The cyanide-free copper-zinc alloy plating solution comprises 18-24 g / L of polycuprous thiocyanate, 9-13 g / L of polyzinc thiocyanate, 130-170 g / L of polysodium thiocyanate and 8-12 mL / L of brightener, the pH value of the plating solution is 10-12, the temperature of a plating bath is 35-55 DEG C, the cathode current density is 0.5-1.5 A / dm < 2 >, the cathode movement speed is 3-5 m / min, a copper-zinc alloy plate with the copper mass fraction being 68% is used as an anode, and the anode movement speed is 3-5 m / min. The brightening agent is prepared from 60 to 100 parts of N, N '-di-n-propylethylenediamine, 10 to 20 parts of waterborne polyurethane resin, 80 to 120 parts of polyacrylamide of which the molecular weight is less than 8000 and 770 to 870 parts of deionized water. A steel matrix or zinc alloy matrix copper-zinc alloy and bright nickel plated sample piece is subjected to an acetate fog test for 72 h according to GB / T 10125-2021 Artificial Atmosphere Corrosion Test Salt Spray Test, the surface of the steel matrix or zinc alloy matrix copper-zinc alloy and bright nickel plated sample piece is free of rust, and according to GB / T 5270-2005 Metal Covering Layer Electro-Deposition and Chemical Deposition Layer Adhesive Strength Test Method, the coating binding force is tested by a thermal shock method. And the result meets the standard requirement.

A sheet metal substrate (1) for use in elevators, comprising: a single body (2) extending from a top side (2a) to a bottom side (2b) and from a left side (2c) to a right side (2d), in which the edges (3) of the top side (2a) and the bottom side (2b) and the edges (3) of the left side (2c) and the right side (2d), as reinforcement, are bent backwards and inwards so as to define, for each side, an inner recess (4) extending along the corresponding side (2a, 2b, 2c, 2d); at least one reinforcement (10) of a first type extending longitudinally and attached to an intermediate region of the rear side (2f) of the body (2); at least two reinforcements (20) of a second type, which extend longitudinally and are arranged at least partially in the inner recesses (4) of the left side (2c) and the right side (2d), respectively; at least one reinforcement (30) of a third type, which is formed transversely and is arranged at least partially in the inner recess (4) of the top side (2a).

The invention discloses a pressure or pre-tightening force monitoring intelligent gasket using an etching circuit, and the gasket comprises a pressed region disposed in the inner periphery, and the pressed region is provided with a variable capacitor whose capacitance value is in an expressible relationship with the pressure; the non-compression area is arranged on the periphery and provided with a metal substrate, and a frequency conversion circuit, a resonance circuit and a radio frequency antenna are etched on the metal substrate; the resonant circuit and a variable capacitor form an LC parallel resonant circuit based on an inductance element, the capacitance value of the capacitor is changed through the change of pressure or pre-tightening force borne by the variable capacitor, so that resonant signals with different resonant frequencies are generated, and the resonant signals are transmitted by a radio frequency antenna after being subjected to frequency conversion through a nonlinear electronic component of a frequency conversion circuit. Therefore, pressure or pre-tightening force monitoring of the to-be-measured bolt is realized. The intelligent gasket, especially the antenna circuit structure, is simplified, the circuit and the antenna obtained through the etching technology are low in power consumption and stable in signal, and the intelligent gasket has the advantages of being convenient to deploy, long in service life, easy to maintain and the like.

The invention relates to the technical field of metal material coatings, in particular to a PVD composite coating and a preparation method thereof. The preparation method comprises the following steps: pretreating a metal matrix to obtain a pretreated matrix; carrying out magnetron sputtering deposition on the surface of the pretreated matrix by using a composite target material, carrying out plasma spraying and laser texturing for multiple times, and repeating the process to form a composite coating crude product containing a third rare earth doped high-entropy alloy coating; the composite coating crude product is subjected to post-treatment, and the composite coating is obtained; wherein the composite target material is AlCoCrFeNi-Y, and the composite oxide comprises aluminum oxide, titanium oxide and cerium oxide. According to the preparation method, the bonding strength, hardness and strength of the composite coating can be remarkably improved through magnetron sputtering deposition of the rare earth doped high-entropy alloy coating, plasma spraying formation of the composite ceramic coating with the gradient content, laser texturing treatment, alternate construction of multiple layers of coatings and the like in combination with elaborately selected materials with low expansion coefficients.

The invention relates to the technical field of preparation of heat-conducting materials, in particular to a preparation method of a graphene metal heat-conducting gasket, which comprises the following specific steps: S1, pretreatment of graphene, S2, plasma treatment of graphene, S3, preparation of a metal substrate, S4, nano-particle deposition of the metal substrate, S5, compounding of graphene and the metal substrate, and S6, post-treatment. According to the method, the graphene is subjected to plasma treatment, and the nanoparticles are deposited on the surface of the metal substrate, so that the bonding strength of the graphene and the metal is greatly improved, the interface thermal resistance is effectively reduced, heat can be transferred between the graphene and the metal more smoothly, and the heat transfer efficiency is improved. The heat generated in the operation process of the electronic equipment can be conducted out more quickly, the problem of local overheating is effectively avoided, the stability and reliability of the equipment are greatly improved, and the service life of the equipment is prolonged.

The invention relates to a method for manufacturing a carbon oil filled single-layer metal substrate, which comprises the following steps of: cutting a metal substrate, and providing the metal substrate with a preset size; performing first-time drilling processing, performing back drilling processing on the metal substrate to form a grounding hole, and synchronously processing a first positioning hole for positioning an outer-layer circuit; filling holes with carbon oil; curing treatment: baking the metal substrate filled with the carbon oil; manufacturing an outer layer circuit pattern; drilling for the second time, namely processing a second positioning hole for carbon oil printing positioning on the metal substrate; carbon oil printing, wherein carbon oil printing operation is carried out based on the second positioning hole; and a post-treatment process: carrying out subsequent treatment on the metal substrate subjected to carbon oil printing to obtain a finished product of the metal-based circuit board. The metal substrate is subjected to processing operations of secondary drilling and secondary carbon oil printing, so that accurate positioning can be realized, and deviation of the circuit board caused by telescopic deformation after circuit manufacturing etching is prevented.

The invention belongs to the technical field of sodium ion batteries, and particularly relates to a reference electrode and a preparation method and application thereof, the reference electrode comprises a metal substrate and a coating layer coating the metal substrate; the coating layer comprises sodium vanadium phosphate, a conductive agent, a binder and a solvent. The reference electrode disclosed by the invention has the beneficial effects that the reference electrode adopts sodium vanadium phosphate with stable potential as a raw material for preparing the reference electrode, so that the problem of poor chemical stability of metal sodium is fundamentally solved, and pre-activation is not needed; the assembled flexibly-packaged sodium ion battery reference electrode system can be directly adopted for in-situ activation, so that the method is easy to test, popularize and apply, and has a wide application field; when the three-electrode battery cell is manufactured, the reference electrode is directly implanted into the battery cell, the manufacturing process is simple and safe, the test stability is improved, and the problems of sodium dendrites, complex sodium modification process and high sodium modification cost are avoided.

The present application relates to a dual-polarized filtering antenna unit and a dual-polarized filtering antenna array, and relates to the technical field of antennas. The dual-polarized filtering antenna unit comprises a metal substrate and a radiating layer, a plurality of dielectric layers are provided between the metal substrate and the radiating layer, and a first via hole and a second via hole are provided on each dielectric layer, wherein the first via holes and the second via holes are for accommodating metal pillars, and the metal pillars are for transmitting current signals. Axes of the first via holes of the plurality of dielectric layers are parallel or coincident. The first via holes of the adjacent dielectric layers are electrically connected through the metal layer between the adjacent dielectric layers.

The invention discloses a coating, a preparation method and application, and relates to the technical field of anticorrosive coatings. A dry film of the coating comprises 0.1 wt%-6wt% of a lamellar filler; the lamellar filler is prepared by loading magnetic nanoparticles on the surfaces of two-dimensional nanoparticles and coating a layer of high-molecular polymer. After the coating forms a film, a specific magnetic control orientation curing method is matched, so that high dispersion stability and planar orientation arrangement of the two-dimensional nano filler in a resin matrix are realized, and corrosion of water and oxygen to a base material can be effectively blocked. When the thickness of the coating dry film is only 1-2 microns, the coating dry film still has no obvious corrosion phenomenon after being subjected to a neutral salt spray test for 2000 hours. The metal base material with the thin coating thickness has heat conductivity, corrosion resistance and weather resistance, the preparation process is simple, the cost is low, and the metal base material has extremely high market application value.

The invention provides a semiconductor power module and a preparation method of the semiconductor power module, and relates to the technical field of semiconductors. The semiconductor power module comprises a bearing substrate, a double-sided metal substrate, a chip, a conductive connecting layer and a connecting wire, the double-sided metal substrate is arranged on the bearing substrate, and the double-sided metal substrate comprises a bearing insulating layer, a first metal layer, a second metal layer and a third metal layer; the chip is arranged on the second metal layer; the conductive connecting layer is sintered and fixed on the surface of one side, deviating from the second metal layer, of the chip and covers an electrode of the chip; the connecting wire is bonded between the conductive connecting layer and the third metal layer. Compared with the prior art, the method has the advantages that the conductive connecting layer fixed through sintering does not need to be additionally welded with copper foil during actual lead bonding, the copper foil preparation and welding steps in the conventional technology are omitted, the lead bonding process can be simplified, the process difficulty is low, and the process cost is reduced.

The present invention relates to the field of surface treatment technology, and in particular to a preparation method and application of a conductive anti-corrosion coating for a magnesium alloy bipolar plate, wherein the preparation method comprises the following steps: S1, mixing a conductive high molecular polymer, an adhesive and an organic solvent to obtain a coating; S2, coating the coating on the surface of the magnesium alloy to form a coating. The present invention uses a magnesium alloy with extremely low density as a substrate, and arranges a corrosion-resistant coating on the surface of the substrate. The corrosion-resistant coating uses a conductive high molecular polymer such as polyaniline as a matrix material. Polyaniline has corrosion inhibition behavior and anion exchange properties. While protecting the underlying metal substrate, it can exchange anions with chloride ions in a corrosive environment to inhibit the penetration of corrosive anions. At the same time, not only is an adhesive added to enhance the bonding strength between the polyaniline coating and the magnesium alloy and to bond the polyaniline particles, but nano-oxides are also added as corrosion inhibitors to further improve the corrosion resistance of the coating.

The invention relates to the technical field of heat insulation materials, in particular to a ceramic aerogel coating and a preparation method thereof.The ceramic aerogel coating comprises a ceramic anti-corrosion bottom layer, a middle coating and a transparent surface layer, and the preparation method of the ceramic aerogel coating comprises the steps that firstly, sand blasting treatment is conducted on a metal base material; step II, spraying a ceramic anti-corrosion primer, and drying; iII, preparing a floating coat base material; iV, spraying a floating coat base material, and sealing and baking; v, spraying a floating coat fabric, and sealing and baking; step VI, polishing the coating; step VII, spraying transparent finish paint after polishing, and sealing and drying; and step VIII, after unified inspection is completed, finish paint is sprayed, sealing baking is conducted for thorough drying, and then the ceramic aerogel coating is obtained, the prepared ceramic aerogel coating is good in adhesiveness, excellent in acid and alkali resistance, not prone to cracking and peeling, capable of protecting metal for a long time, low in heat conductivity coefficient and high in hardness, and the problems that an existing aerogel coating is high in brittleness, weather resistance and hardness and not prone to cracking and peeling are solved. And the mechanical performance is low.