86 results about "Nickel coating" patented technology

The invention relates to the technical field of corrosion-resistant coatings, in particular to a post-treatment method for improving the corrosion resistance of a chemical nickel-plated layer in a plasma environment. Comprising the following steps: preparing composite sol, coating a workpiece, carrying out plasma-assisted curing, and then carrying out heat treatment on an inorganic-organic hybrid coating framework; an inorganic-organic hybrid coating framework firmly combined with a nickel-plated layer is formed on the surface of a chemical nickel-plated workpiece under a low-temperature condition by preparing composite sol and matching with plasma-assisted curing, and rare earth elements are immobilized in situ; the inorganic-organic hybrid coating framework is further condensed through subsequent heat treatment, pore collapse and structural densification are achieved, and therefore the final compact corrosion-resistant coating is formed, and rare earth elements are fixed in the compact corrosion-resistant coating in a chemical bonding mode; therefore, thermal stress and interface stripping risks caused by a thermocuring process are eliminated, and long-acting, stable and reliable protection on a matrix under extremely harsh working conditions is realized.

The invention provides fine grid slurry and a preparation method thereof, a solar cell and a photovoltaic module. The fine grid slurry is prepared from the following components in parts by weight: 50 to 65 parts of silver powder, 15 to 25 parts of silver modified nickel-coated copper powder, 2 to 5 parts of alloy powder, 2 to 5 parts of glass powder, 0.5 to 2 parts of aluminum oxide, 10.5 to 17.5 parts of organic carrier and 0.5 to 1.8 parts of additive, the silver-modified nickel-coated copper powder comprises a copper inner core, a nickel coating layer and a silver coating layer, wherein the outer surface of the copper inner core is sequentially coated with the nickel coating layer and the silver coating layer from inside to outside. The alloy powder comprises Ni element, B element and Si element; the aluminum oxide is spherical nano aluminum oxide; the organic carrier comprises organic silicon modified acrylic resin and epoxy resin. According to the fine grid slurry, the raw material cost is remarkably reduced, the process compatibility is good, silk-screen printing can be better supported, and the photoelectric conversion efficiency of a photovoltaic module can be better improved.

The invention provides a method for enabling an optical fiber module interface radiator to be closely attached to an indium heat-conducting sheet. The method comprises the steps that the surface of a nickel-plated layer of the interface radiator is polished to form a rough surface; preliminarily forming an indium heat-conducting sheet on the rough surface; then the workpiece is placed on a jig platform, and a mirror surface roller is arranged on the jig platform; providing a PET (Polyethylene Terephthalate) sheet which is positioned between the surface of the indium heat-conducting sheet and the mirror roller; the method comprises the following steps: pressing an indium heat-conducting sheet into a roller under the roller pressure of 40-110kgf, riveting the bottom of the indium heat-conducting sheet into a rough surface which is tightly combined with the interface radiator, so that a gap and air do not exist on the combined surface, and the top surface of the indium heat-conducting sheet is a flat smooth surface, is attached to the surface of the interface radiator and is tightly combined and molded into an indium heat-conducting thin layer; the surface of the indium heat conduction thin layer is coated with an anti-oxidation coating with the thickness of 1-5 microns; therefore, the indium heat-conducting material can be tightly adhered to the surface of the interface radiator without an adhesive, the interface radiator has excellent drawing resistance and friction resistance, and the influence of thermal resistance caused by air and the adhesive is reduced.

This invention belongs to the field of metal powder preparation technology, and discloses a porous nickel powder, its preparation method, and its applications. The method includes: preparing nickel oxalate powder as a precursor; forming a nickel coating layer on the surface of the nickel oxalate powder by chemical plating to obtain nickel oxalate@nickel core-shell structured composite particles; subjecting the composite particles to pyrolysis annealing treatment, causing the internal nickel oxalate to decompose and generate gas, and the external nickel coating layer to transform into a porous metal framework, thereby obtaining porous nickel powder. This method is simple, low-cost, and produces nickel powder particles with uniform size, stable pore structure, good connectivity, and large specific surface area, making it suitable as a precursor for electrocatalytic active materials or porous electrode materials.

The application discloses a nickel-plated steel strip lead processing method and belongs to the technical field of metal material surface treatment. The method aims to solve the problems of poor plating layer adhesion, large internal stress and easy peeling of the existing nickel-plated steel strip lead. The process steps include: S1, steel strip oil removal treatment; S2, composite activation treatment: the oil-removed steel strip is immersed in a composite activation solution containing sodium citrate to remove the surface oxide layer and form an active adsorption film; S3, nickel plating: the activated steel strip is immersed in a sulfate plating solution containing saccharin and 1,4-butynediol as composite additives for electroplating to form a low-stress and high-density nickel plating layer; S4, post-treatment: cleaning and drying; S5, slitting and packaging. The application cooperates sodium citrate activation with a plating solution system containing stress relieving agents, significantly improves the adhesion between the substrate and the plating layer, reduces the internal stress of the plating layer, and the obtained product has no peeling and falling of the plating layer after repeated bending, low porosity and excellent comprehensive performance, and is particularly suitable for the manufacturing of high-performance electronic component leads.

The invention belongs to the technical field of environmental science and water treatment, and particularly relates to a PLA-Ni-coated MOF composite membrane and a preparation method and application of the PLA-Ni-coated MOF composite membrane. Comprising a porous polylactic acid substrate film constructed by 3D printing, a metal nickel layer arranged on the surface of the polylactic acid substrate film, and a ZIF-8 nanoparticle layer arranged on the surface of the metal nickel layer, the metal nickel layer is arranged between the polylactic acid substrate film and the ZIF-8 nanoparticle layer. The PLA-Ni-coated MOF composite membrane has a three-stage hierarchical composite structure of a PLA substrate membrane, a nickel coating and a ZIF-8 particle layer, is stable in structure and excellent in performance, has good mechanical strength and acid and alkali resistance stability, and is suitable for large-scale industrial oil-water separation.

This invention belongs to the field of grinding disc manufacturing technology, specifically relating to a diamond positioning and implanted grinding disc and its manufacturing method. The grinding disc substrate undergoes a series of processes including degreasing and activation treatments, followed by basic nickel plating to form a base nickel plating layer. Then, using photolithography, a photosensitive dry film pattern with pre-drilled micro-holes is created on the surface of the nickel plating layer. Adhesive is then applied to fill the micro-holes, and diamond abrasive grains are implanted, ensuring the sharp corners remain upwards for initial fixation. Finally, the photosensitive dry film is removed, and a thicker nickel plating reinforcement treatment is performed, ensuring the diamond abrasive grains are firmly encapsulated by the nickel plating layer. This method utilizes photolithography to achieve precise positioning and uniform distribution of the diamond abrasive grains on the substrate surface, and through process control, maintains the abrasive grains in a favorable cutting posture with their sharp corners upwards, significantly enhancing the grain holding strength and effectively preventing loosening, collapse, or detachment. The resulting grinding disc exhibits superior cutting efficiency and stability.

The invention discloses a pi-shaped chip high-voltage pulse attenuation network resistor and a manufacturing method thereof, and belongs to the technical field of electronic components. The network resistor structure comprises a ceramic substrate, a resistive layer, a resistive layer R1, a resistive layer R2, a resistive layer R3, a surface electrode, a back electrode, a side electrode, an electrode nickel-plated layer, an electrode lead-tin-plated layer, a glass protection layer and an epoxy resin layer. The manufacturing method comprises the following steps: printing a surface electrode on the upper surface of a ceramic substrate, printing a back electrode on the lower surface of the ceramic substrate, printing a resistive layer bridged on the surface electrode, printing protective glass on the resistive layer, carrying out laser resistance trimming on the resistive layer, printing an epoxy resin protective layer and a mark on the protective glass, and sputtering a metal layer on the end surface. And preparing an electrode nickel-plated layer and a lead-tin-plated layer on the end surface. The problems that in the prior art, overheat burnout is likely to occur, electrodes are likely to be eroded in a humid or sulfur-containing environment, and the manufacturing precision and stability are difficult to improve and control are solved. The resistor is widely applied to the technical field of attenuation network resistors.

The invention discloses a copper oxide photocatalytic formaldehyde removal fiber and a dust removal duster prepared from the same, relates to the technical field of fibers, and provides a preparation method of the copper oxide photocatalytic formaldehyde removal fiber and application of the copper oxide photocatalytic formaldehyde removal fiber to the dust removal duster, and formaldehyde in air is degraded through photocatalysis while dust is removed, so that the indoor air quality is improved. A silicon dioxide-carbon compound is further prepared, the good formaldehyde adsorption effect can be achieved, then the silicon dioxide-carbon compound is subjected to nickel plating treatment, nano yttrium oxide is added into a nickel plating solution, the roughness of a nickel plating layer can be increased through addition of the nano yttrium oxide, and the formaldehyde adsorption effect is improved. The specific surface area of the nickel-plated silicon dioxide-carbon compound is increased, and the next step of copper plating treatment is facilitated, so that the formaldehyde removal capability of the copper oxide photocatalytic formaldehyde removal fiber is enhanced.

The invention discloses a nickel-plated titanium alloy vapor chamber and a preparation method thereof, and relates to the technical field of vapor chamber preparation. The vapor chamber is composed of an upper cover and a lower cover which are made of titanium alloy materials, the surface of the vapor chamber is coated with a nickel plating layer, and the preparation method of the vapor chamber comprises the steps that a part welded with a capillary structure is subjected to monomer passivation, then the upper cover and the lower cover are subjected to laser sealing and vacuumizing pre-sealing, and a semi-finished product with a high-vacuum-degree inner cavity is formed; and then the surface of the semi-finished product is subjected to nickel plating treatment, and finally opening breaking, liquid injection and sealing are conducted. According to the method, vacuumizing and pre-sealing are carried out before nickel plating, the technical problems that in a traditional technology, due to high-temperature baking, a vapor chamber swells, and an inner cavity is polluted by nickel plating liquid medicine are effectively solved, meanwhile, it is guaranteed that high binding force exists between a nickel plating layer and a titanium alloy base body, and the product has the light weight, high reliability and excellent heat dissipation performance.

This invention relates to a nickel-plated steel sheet with excellent corrosion resistance for battery casings and a method for manufacturing the same. In one specific embodiment, the nickel-plated steel sheet comprises: a base steel sheet; a nickel plating layer formed on at least one surface of the base steel sheet; and a nickel-iron diffusion layer formed between the base steel sheet and the nickel plating layer. The nickel plating layer and the nickel-iron (Ni-Fe) diffusion layer are formed by heat treatment after forming an electroplated nickel layer on the base steel sheet and a chemically plated nickel layer on at least a portion of the surface of the electroplated nickel layer. The nickel plating layer contains one or more vacancy elements selected from phosphorus (P), boron (B), tungsten (W), cobalt (Co), molybdenum (Mo), and copper (Cu) on its surface.

The application relates to a high-radiation shielding particle material and a preparation method thereof, and belongs to the technical field of shielding materials. The application aims to solve the problems that the existing radiation shielding materials cannot have the shielding performance of gamma rays, good flexibility and convenient construction performance and the like, and the particle material is composed of glass microspheres, a chemical nickel plating layer, an electroplated lead layer, an electroplated tungsten layer and an electroplated tantalum layer. The thickness of each layer is controlled to be 20 mu m. The method is that nickel is deposited on the surface of the glass microspheres by a chemical nickel plating method, and then an electroplated lead layer, an electroplated tungsten layer and an electroplated tantalum layer are sequentially deposited by an electroplating method. The glass microspheres are pretreated, and nickel is deposited on the surface of the glass microspheres by a chemical nickel plating method, so that other electroplated layers can be more easily deposited on the surface; the electroplated lead layer and the electroplated tungsten layer have the characteristics of good combined shielding performance of gamma rays and neutrons; and the metal tantalum layer has good gamma ray shielding performance and excellent mechanical performance.

The present disclosure relates to a nickel plated steel sheet for a battery case having excellent corrosion resistance and a method for manufacturing the same. In one embodiment, the nickel plated steel sheet comprises: a base steel sheet; a nickel plating layer formed on one or more surfaces of the base steel sheet; and a nickel-iron (Ni—Fe) diffusion layer formed between the base steel sheet and the nickel plating layer; wherein the nickel plating layer and the nickel-iron (Ni—Fe) diffusion layer are formed by forming an electro-nickel plating layer on the base steel sheet and an electroless nickel plating layer on at least a portion of the surface of the electro-nickel plating layer, followed by heat treatment, and the nickel plating layer includes one or more co-deposited elements selected from phosphorus (P), boron (B), tungsten (W), cobalt (Co), molybdenum (Mo), and copper (Cu) on its surface.

The invention discloses a brazing method for a sapphire-ceramic vacuum arc-extinguishing chamber window and application of the brazing method. The brazing method comprises the steps that an activation layer, a barrier layer and a brazing layer are sequentially deposited on a sapphire brazing face, and a molybdenum-manganese method is used for sintering and chemical nickel plating is carried out on an annular trepanning area of a ceramic shell; the oxygen-free copper metal foil, the kovar alloy metal foil and the nickel metal foil are compounded into a whole, the oxygen-free copper side of the obtained annular composite transition ring is aligned with the sapphire brazing layer, the copper brazing filler metal ring is placed in the middle of the annular composite transition ring, the nickel side of the composite transition ring is aligned with the nickel-plated layer at the opening of the ceramic shell, the copper brazing filler metal ring is placed in the middle of the annular composite transition ring, and the obtained assembly is subjected to vacuum brazing. Two high-strength and high-airtightness brazed joints are formed at a time, and therefore the sapphire window is connected to the ceramic shell in a sealed mode through the composite transition ring. By introducing a multi-layer composite transition layer structure, the thermal stress matching problem is effectively solved, so that a sealing interface with ultrahigh air tightness, high mechanical strength and excellent long-term reliability is realized.

This invention discloses a cathode plate mesh for water electrolysis, its preparation method, and an electrolysis apparatus, relating to the field of hydrogen production through water electrolysis. Molten nickel and aluminum droplets are sprayed onto the heated electrode plate mesh surface using atmospheric plasma spraying. This facilitates diffusion between the heated electrode plate mesh surface and the molten nickel and aluminum droplets, increasing the contact area between nickel / aluminum and nickel / nickel, while simultaneously promoting the diffusion of numerous elements to form a strong bond. Heating the nickel-aluminum mixed coating surface promotes interfacial bonding of deposited particles and facilitates diffusion at the nickel-aluminum interface, forming a nickel-aluminum alloy. This further enhances the surface activity of the porous nickel coating after aluminum removal and activation. The preparation method provided in this invention enables the preparation of a catalytic nickel coating on the electrode plate mesh surface, resulting in a porous nickel coating with high interfacial bonding strength and high activity, meeting the requirements for efficient and stable operation in an electrolyzer.

The invention relates to the technical field of electronic components, in particular to a high-moisture-proof multi-layer resistor and a preparation method of the high-moisture-proof multi-layer resistor. The resistor comprises an aluminum oxide substrate, a front electrode, a back electrode and a resistance layer between the front electrode and the back electrode; a first protective layer made of glass, a second protective layer which correspondingly covers the laser cutting line groove and is made of thermosetting ink, a third protective layer and a fourth protective layer which are made of at least two layers of epoxy resin, and a fifth protective layer which is positioned at the lap joint of the electrode and the protective layer and is made of resin silver are sequentially laminated on the resistive layer; the outer side of the electrode is provided with a nickel-plated layer and a tin-plated layer which extends and is lapped to the surface of the fourth protective layer; the preparation method comprises the steps of printing and sintering each functional layer and forming each protective layer in a targeted manner. According to the invention, through a multi-layer synergetic sealing structure, especially enhanced protection of a laser groove and an electrode interface, and epitaxial lap joint of a metal coating, excellent moisture resistance, long-term electrical stability and high reliability are realized, and the device is suitable for a harsh environment.

The present application relates to the technical field of corrosion-resistant coating, in particular to a post-treatment method for improving corrosion resistance of electroless nickel coating in plasma environment. The method comprises composite sol preparation, workpiece coating, plasma-assisted curing and subsequent heat treatment of inorganic-organic hybrid coating framework. The method makes the surface of electroless nickel workpiece form a firm inorganic-organic hybrid coating framework combined with the electroless nickel coating at low temperature by preparing composite sol and plasma-assisted curing, and in-situ immobilizes rare earth elements. The subsequent heat treatment promotes the further condensation of the inorganic-organic hybrid coating framework, realizes pore collapse and structure densification, thereby forming a final dense corrosion-resistant coating, and fixes the rare earth elements in the dense corrosion-resistant coating by chemical bonding. Thus, the risk of thermal stress and interface peeling caused by heat curing process is eliminated, and long-term, stable and reliable protection of the substrate under extremely harsh working conditions is realized.

The invention relates to a nickel electroplating bath for depositing a decorative nickel coating on a substrate to be treated, characterized in that the electroplating bath comprises at least one source of nickel ions, at least one amino acid and / or at least one carboxylic acid other than an amino acid; wherein the total concentration of the amino acids is in the range of from 1 to 10 g / l, and wherein the total concentration of carboxylic acids, not amino acids, is in the range of from 10 to 40 g / l; wherein the electroplating bath is free of boric acid; wherein the total concentration of the nickel ions is in the range of 55 to 80 g / l; and wherein the nickel electroplating bath has a chlorine content in the range of 7.5 to 40 g / l. The invention also relates to a method for depositing a nickel coating on a substrate to be treated; and the use of such a nickel electroplating bath according to the invention for depositing bright, semi-bright, satin, matte or non-conductive particle-containing nickel coatings by carrying out this method.

Provided is electroconductive particles with excellent properties in terms of connection resistance and connection reliability by forming an even noble metal layer on the surface of a nickel coating after surface treatment, without leaving impurities on the nickel coating. This method for producing electroconductive particles includes: an acid treatment step in which nickel-coated particles each comprising a core particle and a nickel or nickel alloy coating formed on the surface thereof are brought into contact with an aqueous solution of an organic acid; and a plating process step in which the acid-treated nickel-coated particles are plated by electroless noble-metal plating. Formic acid, acetic acid, or the like can be used as the organic acid.

The utility model relates to the technical field of resistors, in particular to an anti-vulcanization thick-film chip resistor for an automobile. According to the technical scheme, a resistance layer is arranged on a substrate, positive electrodes are arranged on the two sides of the resistance layer, side electrodes wrap the outer sides of the positive electrodes, back electrodes are arranged on the two sides of the bottom end of the substrate, second clamping teeth are arranged on the back electrodes, clamping grooves are formed in the positive electrodes, first clamping teeth and limiting protruding blocks are arranged on the side electrodes, and the limiting protruding blocks are arranged on the first clamping teeth. The side electrode is clamped with the second clamping tooth and the clamping groove through the first clamping tooth and the limiting convex block respectively; the outer side of the side electrode is coated with a nickel-plated layer and a tin-plated layer, and the outer side of the resistive layer is coated with an inner protective layer and an outer protective layer. According to the utility model, through a unique clamping structure, the electrode connection stability is obviously enhanced, the contact resistance is reduced, and the current transmission stability is ensured. Due to the multi-layer protection design, vulcanization and water vapor erosion are effectively resisted, the service life of the resistor is prolonged, and powerful support is provided for reliable operation of an automobile electronic system.

This application belongs to the field of environmental science and water treatment technology, and specifically relates to a PLA-Ni@MOF composite membrane, its preparation method, and its application. The PLA-Ni@MOF composite membrane has a three-level hierarchical composite structure, including: a porous polylactic acid (PLA) substrate membrane constructed by 3D printing, a nickel layer disposed on the surface of the PLA substrate membrane, and a ZIF-8 nanoparticle layer disposed on the surface of the nickel layer; the nickel layer is located between the PLA substrate membrane and the ZIF-8 nanoparticle layer. This PLA-Ni@MOF composite membrane has a three-level hierarchical composite structure of "PLA substrate membrane-nickel coating-ZIF-8 particle layer", which is structurally stable, has excellent performance, good mechanical strength and acid and alkali resistance, and is suitable for large-scale industrial oil-water separation.

The utility model relates to the technical field of notebook computer rotating shafts, and discloses a notebook computer rotating shaft reinforcing structure which comprises a notebook computer body, a notebook computer rotating shaft dustproof protection shell is arranged in the notebook computer body, and a large-angle opening and closing mechanism is arranged in the rotating shaft shell. The large-angle opening and closing mechanism comprises a long support, a lower fixing sheet metal structural frame, an upper fixing sheet metal structural frame, a plurality of mounting holes, a rotating shaft rotating assembly, a rubber sealing ring, a dustproof plate, a sealing groove, a conductive copper coating, a nickel coating and a wear-resistant layer, and the rotating shaft rotating assembly is arranged in the inner wall of the notebook computer rotating shaft dustproof protection shell. According to the notebook computer rotating shaft reinforcing structure, the long support is fixedly installed on the left surface of the lower portion fixing metal plate structural frame, when the notebook computer rotating shaft reinforcing structure is used, the long support can be installed in the inner wall of a bottom plate of a notebook computer body through the installation holes, fixing points of a notebook computer rotating shaft are enhanced, and the whole structure is reinforced.

A Ni-plated steel sheet according to one embodiment of the present invention comprises: a base steel sheet; a Ni plating layer positioned on one or both surfaces of the base steel sheet; and an Fe-Ni alloy layer positioned between the base steel sheet and the Ni plating layer, wherein the base steel sheet comprises, by weight%, 0.02 to 0.07% of C, 0.1 to 0.5% of Mn, 0.01 to 0.06% of Al, 0.01 to 0.05% of Nb, and 0.02 to 0.15% of Mo, and the balance of Fe and other inevitable impurities.

A Ni-plated steel sheet, according to one embodiment of the present invention, comprises: a base steel sheet; a Ni-plated layer positioned over one surface or both surfaces of the base steel sheet; and an Fe-Ni alloy layer positioned between the base steel sheet and the Ni-plated layer, the base steel sheet comprising, by weight %, 0.02 to 0.07% of C, 0.1 to 0.5% of Mn, 0.01 to 0.06% of Al, 0.02 to 0.15% of Mo, and the remainder being Fe and other unavoidable impurities.

Provided is an Ni-coated substrate for a separator of an anion exchange membrane water electrolysis device, which exhibits excellent corrosion resistance in the usage environment of a separator of an anion exchange membrane water electrolysis device, which exhibits excellent contact resistance properties with a porous transport layer, and which has excellent productivity.　An Ni-coated substrate for a separator of an anion exchange membrane water electrolysis device according to the present invention comprises a metal substrate and an Ni coating layer on a surface of the metal substrate. The thickness h (μm) of the Ni coating layer satisfies formula (1), and is 1 μm or less. (Fe+Cr×2-Ni×8) / (100×h)<10 … (1) Fe, Cr and Ni in formula (1) indicate the content values (mass%) of the elements contained in the metal substrate, and take a value of 0 if the element in question is not contained.

The application discloses a high-thermal-conductivity stainless steel for a chip support and a preparation method thereof, and relates to the technical field of stainless steel plating. In the application, a nickel layer is first plated on the surface of a stainless steel base, then a copper layer is plated, and finally a high-thermal-conductivity coating is coated to obtain the high-thermal-conductivity stainless steel for the chip support; the nickel has high lattice matching with the stainless steel, the nickel layer has high bonding strength with the stainless steel base, the copper has a thermal conductivity much higher than that of the stainless steel, and the copper plating layer can significantly improve the thermal conductivity; the high-thermal-conductivity coating comprises a multi-epoxy-based epoxy resin, an epoxy-modified carbon nanotube, flaky silver powder, sodium stearate and a curing agent; the high-thermal-conductivity layer formed after the multi-epoxy-based epoxy resin is cured has high crosslinking density, good wear resistance and corrosion resistance, and many reaction sites, and can be quickly cured to improve the efficiency; the epoxy-modified carbon nanotube and the flaky silver powder have a synergistic effect to form a nearly comb-shaped dispersion, which is beneficial to heat dispersion and comprehensive improvement of the heat dissipation.

The invention provides a preparation method of a copper-nickel composite material. The preparation method comprises the following steps: S1) preparing an electrolytic copper foil; (S2) the electrolytic copper foil is subjected to direct current electroplating in the electroplating solution, and a copper-nickel composite material is obtained; the electroplating liquid comprises polyethylene glycol, saccharin sodium salt and 2-(carboxymethyl) benzimidazole. The invention further provides plating electroplating liquid of the copper-nickel composite material. The invention further provides the copper-nickel composite material and application thereof. According to the preparation method of the copper-nickel composite material, the polyethylene glycol, the saccharin sodium and the CMBI are added into the electroplating liquid of the electrolytic copper foil, the polyethylene glycol, the saccharin sodium and the CMBI have a synergistic effect, a continuous nano nickel layer can be constructed on the surface of an electrolytic copper foil substrate under a direct current electroplating technology, preparation of a nano twin crystal-isometric crystal composite structure is achieved, and the copper-nickel composite material is prepared. And the hardness, the thermal stability, the corrosion resistance and the surface smoothness of a nickel plating layer are remarkably improved.

The utility model discloses a low-resistance adhesive tape of a perovskite battery assembly. Comprising a copper foil layer, a first tin plating layer electroplated on the upper end face of the copper foil layer, a first copper plating layer electroplated on the upper end face of the first tin plating layer, a first nickel plating layer electroplated on the upper end face of the first copper plating layer, a second nickel plating layer electroplated on the lower end face of the copper foil layer and a second copper plating layer electroplated on the lower end face of the second nickel plating layer. The second tin plating layer is electroplated on the lower end face of the second copper plating layer; and the modified acrylic conductive adhesive is coated on the lower end face of the second tin plating layer. The adhesive tape has the advantages that the whole adhesive tape has higher viscosity at normal temperature, and adhesive is not easy to remain; high-efficiency electric conduction can be realized due to good low resistance; the performance of the aged adhesive tape is not affected, and the viscosity and conductivity of the adhesive tape are ensured. The design of multi-layer structure integration is combined with the ultraviolet blocking layer and the conductive layer, so that the dual functions of packaging protection and low-resistance transmission are realized; precious metal is not contained, the cost is reduced, and the environment-friendly requirement is met.

The invention provides a preparation method of a copper-nickel composite coating carbon fiber reinforced epoxy resin composite material, and belongs to the technical field of electromagnetic shielding materials, and the preparation method comprises the following steps: pretreating the surface of carbon fiber; the pretreated carbon fiber serves as a cathode, a nickel plate serves as an anode, and spherical nickel-plated layer carbon fiber is obtained through electroplating in nickel electroplating liquid; immersing the nickel-plated carbon fiber into a copper plating solution for copper plating to obtain copper-nickel composite plated carbon fiber; the copper-nickel composite coating carbon fiber is immersed in KH550 hydrolysate to be modified, and modified copper-nickel composite coating carbon fiber is obtained; placing the modified copper-nickel composite coating carbon fiber in a mold, and infiltrating the modified copper-nickel composite coating carbon fiber by using a carboxylated carbon nanotube doped epoxy resin matrix; and curing and demolding the infiltrated modified copper-nickel composite coating carbon fiber to obtain the copper-nickel composite coating carbon fiber reinforced epoxy resin composite material. According to the preparation method of the copper-nickel composite coating carbon fiber reinforced epoxy resin composite material provided by the invention, the prepared material is wide in electromagnetic shielding frequency band coverage and good in mechanical property.

The invention discloses silver-coated copper powder and a preparation method thereof.The preparation method of the silver-coated copper powder comprises the following steps that copper powder is obtained, the copper powder and a nickel plating solution are evenly mixed, a nickel plating reduction solution is added, a nickel plating reduction reaction is conducted, a nickel plating layer is formed outside the copper powder, and nickel-coated copper powder is obtained; the nickel-coated copper powder is subjected to annealing treatment, so that the nickel-plated layer is crystallized, and crystallized nickel-coated copper powder is obtained; and uniformly mixing the crystallized nickel-coated copper powder with a silver plating solution, adding a silver salt complexing solution, carrying out a silver plating reduction reaction, and forming a silver plating layer outside the crystallized nickel-coated copper powder to obtain the silver-coated copper powder. The silver-coated copper powder prepared by the preparation method has excellent oxidation resistance and conductivity, has metal properties of copper, nickel and silver, and can be applied to the fields of electronic materials such as aerospace, electromagnetic shielding materials, conductive coatings and the like.