283 results about "Silver coating" patented technology

The invention relates to the technical field of material detection, in particular to a silver coating adhesive force detection method based on multi-frequency impedance imaging, which comprises the following steps: applying a dual-mode multi-frequency excitation signal to the surface of a silver coating through an attached microelectrode array, synchronously acquiring voltage-current response data, and generating a dual-mode multi-frequency impedance original data set; performing time-varying impedance phase-locked separation on the dual-mode multi-frequency impedance original data set, extracting a dynamic impedance component of a coating-matrix interface region, and reconstructing a three-dimensional sub-interface impedance distribution diagram; and outputting an adhesive force quantized value through an oscillation frequency-adhesive force conversion model according to the spatial oscillation frequency characteristics of the impedance phase in the three-dimensional sub-interface impedance distribution diagram. According to the invention, a double-phase-locked loop system is adopted to realize the time-varying component demodulation of the impedance response of the silver coating-matrix interface, the low-frequency dynamic impedance signal modulated by silver ion migration is effectively extracted, and the weak change of the interface bonding state is sensitively reflected.

The invention discloses a stainless steel material for a food-grade straw and a preparation process of the stainless steel material, and relates to the technical field of stainless steel material plating. The silver coating and the antibacterial coating are arranged on the surface of the stainless steel material, and the stainless steel material has good wear resistance and antibacterial performance through the action of the double protective layers. Sulfonated polyphenylene sulfide is added into a silver plating solution, a plating layer is formed after electroplating, the surface of a stainless steel material is not prone to being scratched, the wear resistance of stainless steel is improved, quaternary ammonium salt modified tea polyphenol-nano-silver composite particles are added into the antibacterial coating, and through the synergistic antibacterial effect of quaternary ammonium salt, tea polyphenol and nano-silver, the wear resistance of the stainless steel material is improved. The broad-spectrum antibacterial property is realized, and the efficient antibacterial effect is achieved.

The invention belongs to the technical field of metal powder materials, and particularly relates to a preparation and surface modification method of silver-coated copper powder. Comprising the following steps that copper powder activated through a mixed acid solution and a dispersing agent are dissolved in ethyl alcohol, and copper powder turbid liquid is obtained; dropwise adding the silver complexing solution into the copper powder turbid liquid under the condition of water bath heating for reaction to obtain silver-coated copper powder turbid liquid; then, a reducing agent solution is dropwise added into the silver-coated copper powder turbid liquid, silver ions in the solution are further reduced, solid-liquid separation, washing and drying are conducted, and primary silver-coated copper powder is obtained; and finally, the silver-coated copper powder is subjected to surface modification, and the dispersity of the silver-coated copper powder is improved. The preparation method of the silver-coated copper powder provided by the invention is simple in process, and in the chemical oxidation reduction process, the prepared silver-coated copper powder is compact in silver coating, complete in coating, low in resistivity and good in oxidation resistance by regulating and controlling the concentration of silver ions and the complexing agent, the reaction temperature, the type of the dispersing agent, the dripping rate and the type of the surface modifier.

The invention discloses a coating and a method for recovering precious metals in a physical vapor deposition process. The coating mainly comprises a silver coating positioned on the lower layer and an organic silicon modified layer positioned on the surface of the silver coating. Before precious metal is recycled, the coating is prepared on the surface of the position where precious metal needs to be recycled in the physical vapor deposition process, after physical vapor deposition is completed, an adhesive tape is adopted to be pasted to the surface of the coating, and then the precious metal is stripped from the surface of the coating in a mode of tearing the adhesive tape; or scraping the surface of the coating by adopting a tool, so that the noble metal is stripped from the surface of the coating, and stripped noble metal chips are collected; and finally, the adhesive tape with the precious metal or the collected precious metal scraps are heated, and the precious metal is recycled from a heating product. According to the method, efficient stripping and efficient recycling of the precious metal can be achieved, the coating has no influence on physical vapor deposition equipment and the technological process, and the method is simple in technology, high in operability, environmentally friendly, free of pollution and high in economical efficiency when the precious metal is recycled and can be applied to the recycling process of the precious metal on a large scale.

The invention discloses high-oxidation-resistance flaky silver-coated copper particles and a preparation method thereof, and relates to the technical field of silver-coated copper powder. The process comprises the steps of flaky copper powder preparation, copper powder pretreatment, silver coating plating and post-treatment. The surface of the copper powder is pretreated, and active sites on the surface of the copper powder are reduced; secondly, a zinc phosphate plated film is formed, full coverage of a silver layer is achieved by adding nano-silver to assist in a silver ammonia solution, meanwhile, micropores of the silver layer are filled, and the compactness of the silver-coated copper powder is improved; besides, the silver content of the silver-coated copper powder is controlled to be 8.7-14.6%, and the normal-temperature oxidation resistance of the silver-coated copper powder is improved, so that the optimal anti-oxidation effect is achieved, and performance deterioration caused by oxidation is reduced.

The invention belongs to the technical field of metal surface treatment, and discloses a high-uniformity metal surface silver plating process and a corrosion-resistant treatment method thereof.The high-uniformity metal surface silver plating process comprises the following steps that firstly, pretreatment is conducted; step 2, activating treatment; step 3, pre-plating a bottom layer; step 4, electrosilvering; step 5, post-processing; according to the method, pre-plating of the bottom layer and electroplating of silver are combined, a layer of thin nickel or copper is pre-plated firstly, and then electroplating of silver is performed, so that the binding force and uniformity of the silver plating layer are effectively improved, and in the electroplating process, the mode of stirring and circulating the electroplating liquid is adopted, so that silver ions in the electroplating liquid are uniformly distributed, and the uniformity of the plating layer is improved; and a thin aluminum oxide protective film is deposited on the surface of the silver plating layer by adopting a chemical vapor deposition technology, so that the corrosion resistance of the silver plating layer is further improved.

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 discloses ultra-large-particle-size silver-coated copper powder particles and a preparation process thereof, and relates to the technical field of electronic metal materials. The process comprises the steps of atomization preparation of copper powder particles, acid washing, alkali washing, silver coating plating, cleaning and drying and the like. According to the method, the copper powder particles are prepared through the atomization technology, the atomization pressure and the medium flow speed are accurately controlled to crush molten copper into liquid drops with the proper granularity, then the liquid drops are rapidly condensed into the copper powder particles, the particle size of the prepared copper powder particles is stabilized between 7.5 micrometers and 8 micrometers, the particle size is uniform, the yield is high, and the production rate is extremely high; in addition, the silver layer on the particle surface of the silver-coated copper powder prepared by the method is densely and uniformly covered, the average thickness is controlled below 100nm, and the particle performance is ensured on the basis of reducing the cost.

The invention discloses an incision protection sleeve for medical engineering and a production process thereof, the incision protection sleeve comprises an outer layer protection film and an inner layer protection film, the outer layer protection film is composed of a polytetrafluoroethylene base material and a nano-silver composite layer coated on the surface, the density of the nano-silver composite layer is 1.5-3.0 mg / cm, the thickness of the nano-silver composite layer is 0.1-0.3 mm, the diameter of hollow microspheres is 50-200 [mu] m, the wall thickness of the hollow microspheres is 5-15 [mu] m, and the filling rate of the hollow microspheres is 10-30% of the volume of a buffer ring; according to the material innovation, the PTFE-nano-silver composite layer gives consideration to antibacterial performance and durability, the collagen-silica gel buffer layer promotes tissue repair, the structure innovation is that magnetic fixation and a shape memory support achieve one-key type rapid installation, the operation time in an operation is shortened by more than 20%, the process innovation is that laser welding and plasma spraying technologies are combined, the product consistency (tolerance + / -0.05 mm) is ensured, and the production efficiency is improved. Clinical values are as follows: animal experiments prove that the postoperative infection rate is reduced to 1.2% (8.7% in a control group), and the incision healing time is shortened by 3-5 days.

The invention relates to the technical field of composite metal materials, in particular to a silver-coated graphene copper composite material and a preparation method thereof, and aims at solving the problems that traditional silver-coated copper powder is high in silver consumption, copper is oxidized due to the fact that a silver layer is prone to being damaged, and conductivity is insufficient. The method comprises the steps that a graphene coating layer is formed on a copper powder substrate in situ through chemical vapor deposition, and graphene copper powder is obtained; performing etching treatment on the graphene copper powder to controllably expose part of the copper substrate so as to form anchoring points for silver ion deposition; carrying out reduction treatment on the etched graphene copper powder so as to ensure that an anchoring site has chemical activity; in a reductive liquid phase environment, enabling a chemical silver plating solution to react with the graphene copper powder subjected to reduction treatment, and guiding silver ion deposition by utilizing an anchoring point, so as to form a silver coating layer on the surface of the graphene coating layer; and separating and drying the reacted system to obtain the silver-coated graphene copper composite material. The material is better in oxidation resistance and conductivity, and the process is free of waste liquid.

The invention provides a device for assisting an Ommaya bag in extracting cerebrospinal fluid, and belongs to the technical field of medical instruments. Comprising an annular sterile positioning base and an injector, a through hole is formed in the middle of the annular sterile positioning base, a fixing cylinder concentric with the through hole is fixedly connected to the upper surface of the annular sterile positioning base, a stretching assembly is arranged on the right side of the fixing cylinder, and a tightening assembly is arranged in the fixing cylinder; elastic assemblies are arranged on the left side and the right side of the upper surface of the fixing cylinder. The operation sterile area is enlarged through the sterile adhesive layer and the transparent soft plate, the sterile adhesive layer composed of the nano-silver coating can achieve 72-hour continuous antibiosis, infection prevention and pathogen invasion risk reduction, the center position is located through concentric circle cross scales of the sterile semi-transparent film, guiding and visual positioning of the syringe needle are achieved, and the operation safety of the syringe needle is improved. The needle head can vertically penetrate into the center of a capsule cavity, and hematoma or capsule wall damage caused by puncture deviation is avoided.

The invention discloses a preparation method of high-oxidation-resistance silver-coated copper composite powder, which comprises the following steps: (1) pretreatment of copper powder: sequentially putting the copper powder into alkali liquor and acid liquor for pretreatment to obtain the pretreated copper powder; (2) preparation of copper powder suspension: dispersing the pretreated copper powder in a mixed solvent of water and alcohol, then adding a dispersing agent, a reducing agent and a surface tension additive, and adjusting the pH value to 9-11 to obtain the copper powder suspension; and (3) a coating reaction is conducted, specifically, the silver complex solution is dropwise added into the copper powder suspension obtained in the step (2) for the coating reaction, the reaction continues to be sufficient after dropwise adding is completed, the high-oxidation-resistance silver-coated copper composite powder is obtained, and the thickness of a silver coating layer is 150-200 nm. The prepared silver-coated copper composite powder has the advantages of being good in dispersity, uniform and compact in silver coating layer and high in oxidation resistance.

The invention relates to a preparation method of silver-coated mica powder, and belongs to the technical field of conductive powder materials, the silver-coated mica powder comprises modified mica powder and a silver coating layer coating the modified mica powder; wherein a silane coupling agent structure in the Schiff base polymer intermediate can react with hydroxyl on the surface of the mica powder, so that on one hand, the mica powder can be modified, and on the other hand, an organic polymer transition layer is formed on the surface of the mica powder; silver ions are enriched through sulfur and nitrogen multi-reaction active sites in a Schiff base polymer intermediate, so that an organic polymer transition layer and chelated silver ions can be stably attached to the surface of mica powder, and a compact coating layer is formed. And after high-temperature calcination, the silver elementary substance promotes the coating layer to be connected into a sheet through a metal bond between Ag and Ag, the mica powder can be completely coated, and the oxidation resistance of the silver-coated mica powder is improved.

This invention relates to the field of photovoltaic technology and discloses a conductive silver-coated copper micropowder for photovoltaic applications and its preparation method. This preparation method aims to solve the problem of balancing performance and cost in existing silver-coated copper micropowders for photovoltaic applications. In this invention, during the pretreatment stage, the base copper powder is acid-washed but not water-washed. It undergoes pH adjustment, organic pre-bonding treatment, and gradient ammoniation to retain the activity of the copper powder and construct a uniform copper-ammonia complex layer. In the chemical silver plating stage, the pretreatment solution is added to a composite base liquid containing a complexing agent, organic amine, dispersant, and combined reducing agent. A silver-ammonia solution is then added dropwise under ultrasonic dispersion and nitrogen protection. In the post-treatment stage, the product undergoes ethanol reflux desorption, antioxidant treatment, vacuum drying, and low-temperature plasma activation, followed by sieving to obtain the final product. This method can achieve uniform and complete silver coating even with low silver content, providing a feasible path for the large-scale replacement of pure silver powder for photovoltaic applications with silver-coated copper micropowder.

The present application belongs to a kind of anti-tarnish sealant, for the technical problem that existing anti-tarnish agent can only extend the tarnish time, reduce the degree of tarnish, and the high temperature stability is poor, the silver-plated parts after treatment poor acid and salt fog ability, provide a kind of silver coating water-based anti-tarnish sealant, anti-tarnish film and its preparation method, anti-tarnish sealant includes yttrium zirconium composite sol, silane coupling agent, alkyl mercaptan, emulsifier, wetting agent, penetrant and water, it is proved to have the dual role of anti-tarnish and sealing silver coating hole, can significantly improve the anti-tarnish ability and acid and salt fog resistance of silver coating, and has very high high-temperature stability, can withstand 900 ℃ high-temperature baking.

The invention discloses a triboelectric nano-generator prepared by spraying MXene on stretchable polyurethane fibers, a preparation method and an application of the triboelectric nano-generator. The triboelectric nano-generator is integrally of a layered coaxial linear structure and comprises a stretchable layer, a conductive layer, a triboelectric layer and a two-dimensional material layer from inside to outside. The stretchable layer is a polyurethane (PU) layer; the conductive layer is formed by tightly winding a silver wire or a silver-coated nylon wire on the stretchable layer; the triboelectric layer is a polyamide (PA) layer and is used for generating a triboelectric effect; the two-dimensional material layer is used for improving the electrical output performance. According to the method, the production of the triboelectric nano generator FM-TENG with the stretchable polyurethane fiber sprayed with the MXene is realized through a two-step weaving process; the prepared triboelectric nano generator FM-TENG has excellent mechanical performance, stable electrical performance and high customizability, and can be widely applied to the fields of human motion recognition, energy collection, self-powered sensing and the like.

The invention discloses a preparation method of an alkali-resistant silver coating, which comprises the following steps: (1) adding pretreated aluminum powder into a solvent, and then adding chitosan and inorganic metal salt for reaction to prepare chitosan and metal salt coated aluminum powder; the preparation method comprises the following steps: adding a template agent and carbon microspheres into an alkali solution, uniformly dispersing, adding organic silicate ester into an obtained mixture, and reacting to obtain silicon dioxide extinction powder; adding the prepared silicon dioxide matting powder and a modifier into toluene for reflux reaction to prepare surface-modified silicon dioxide matting powder; the preparation method comprises the following steps: uniformly mixing the chitosan with the metal salt coated aluminum powder, the surface modified silicon dioxide matting powder, the accelerant, the flame retardant, the auxiliary agent and the filler, feeding into an extruder for melt extrusion, cooling after extrusion, crushing and sieving to obtain the alkali-resistant silver coating. A coating prepared from the alkali-resistant silver paint provided by the invention on a metal surface can keep stable color and complete in a strong alkaline environment.

The invention relates to the technical field of odor-absorbing towels, in particular to a bacillus subtilis-based biological enzyme odor-absorbing towel and a preparation method thereof.The bacillus subtilis-based biological enzyme odor-absorbing towel comprises the following four layers: a surface layer, a breathable anti-reverse-osmosis non-woven fabric or nano-silver coating material, the pore diameter of the surface layer is smaller than or equal to 0.1 micron, and the surface layer is used for gas adsorption and liquid blocking; the biological enzyme filter membrane layer is formed by loading bacillus subtilis spores (greater than or equal to 108 CFU / g) and immobilized enzymes (lipase and protease) by a sodium alginate / chitosan composite hydrogel membrane; the specific surface area of the adsorption layer is larger than or equal to 1200 m < 2 > / g, the H2S adsorption capacity of the adsorption layer is larger than or equal to 200 mg / g, and the adsorption layer is used for pre-adsorbing high-concentration sulfides; the bottom layer is a microporous PE leakage-proof film, and the humidity is maintained at 60%-80% RH. According to the invention, peculiar smell molecules can be effectively degraded, liquid reverse osmosis can be prevented, and good air permeability and humidity regulation and control capability can be realized.

The present invention relates to the technical field of decorative films, and in particular to an antibacterial and mildew-proof high-flash glitter powder film material and a preparation method thereof, comprising the following steps: S1, taking a biaxially oriented PET film substrate, cleaning and dusting the surface, corona treating it, preheating it, vacuum evaporating a silver layer, cooling it, and removing it from the chamber to obtain a silver-plated PET film; S2, adding a terpolymer to deionized water, ultrasonically dispersing it, adding a water-based polyurethane binder, stirring it, adding glitter powder, and continuing to stir it to obtain a functional coating slurry; S3, evenly coating the functional coating slurry on the surface of the silver-plated PET film, drying it with hot air, curing the coating with UV light, heat-setting it in a nitrogen atmosphere, and winding it up to obtain the antibacterial and mildew-proof high-flash glitter powder film material prepared by the present invention has good optical properties and good antibacterial properties.

The present invention discloses a method for fabricating an intelligent label chip molded packaging module by Au-Sn eutectic soldering, which utilizes the Au bump joints of the intelligent label chip itself to form reliable Au-Sn eutectic soldering with the tin plating layer on the carrier tape or lead frame. The method for fabricating an intelligent label chip molded packaging module by Au-Sn eutectic soldering of the present invention neither requires the commonly used silver plating layer on the metal carrier tape or lead frame, nor requires wire bonding interconnection between the chip Au bump joints and the carrier tape or lead frame, which can reduce the cost of using precious metals, greatly reduce the thickness of the entire intelligent label chip module, has excellent reliability, and can perform high-density intelligent label chip molded packaging on the carrier tape. The present invention also discloses an application of the method for fabricating an intelligent label chip molded packaging module by Au-Sn eutectic soldering.

The utility model discloses vacuum coated glass which comprises a glass body, the upper end of the glass body is provided with a silver coating, the outer surface of the glass body is provided with a limiting frame, the upper end of the glass body is provided with a transparent protection plate, the transparent protection plate is made of a polycarbonate plate or an acrylic plate, and the side face of the limiting frame is provided with an inlet hole. A hidden groove is formed in the inner wall of the limiting frame, the hidden groove corresponds to the position of the entering hole, a push rod is arranged in the hidden groove, matching grooves are symmetrically formed in the inner wall of the limiting frame, and the matching grooves communicate with the hidden groove; a second spring is installed on the inner wall of the matching groove and fixedly connected with the push rod. The transparent protection plate is installed at the upper end of the glass body, the glass body is protected through the transparent protection plate, so that the silver coating on the surface of the glass body is prevented from being damaged by external force, and meanwhile, the transparent protection plate is convenient to replace, convenient and fast.

The invention discloses a preparation device and a preparation method for producing and processing highland barley flavor tofu in a plateau low-oxygen environment, and belongs to the technical field of tofu processing, the preparation device comprises a centrifugal drier main body, and the centrifugal drier main body is provided with a pump suction structure; the pumping structure comprises an electric pump mechanism and a filtering mechanism, the filtering mechanism comprises a filter shell unit, and a filter element assembly is arranged on the filter shell unit; the filter element assembly comprises a transparent top plate, and a blocking piece is arranged on the transparent top plate. In the filtering process of the filtering structure, bacteria in drained water can be killed through the nano-silver coatings loaded on the surfaces of the inner filtering plate and the first elastic membrane, the number of the bacteria in the drained water is effectively reduced, and after the centrifugal drying machine body is closed, the bacteria surviving on the inner filtering plate are killed through the nano-silver coatings, so that the bacteria in the drained water are effectively reduced. Blockage of filter holes of the inner filter plate caused by breeding of bacteria on the inner filter plate is effectively avoided, meanwhile, the number of microorganisms such as bacteria in discharged wastewater can be effectively reduced, and ecological protection of plateau regions is facilitated.

The invention discloses a negative ion nano-silver bionic mask set, and belongs to the technical field of cosmetics. The mask set comprises a nano-silver bionic mask, a negative ion generator and a mask nutrient solution. The nano-silver bionic mask is divided into three layers, and the negative oxygen ion receiving layer is a nano-silver net-shaped coating; the surface of the auxiliary material layer is uniformly coated with the nano-silver reticular coating; the supporting layer is a plastic film; the auxiliary material layer is used for being tightly attached to the face and is made of bionic super-fiber organic silicon materials. The mask nutrient solution comprises an anti-aging and wrinkle-removing nutrient solution, a radiation repairing nutrient solution or a whitening and freckle-removing nutrient solution. According to the working principle, small-particle-size negative ions are generated through the negative ion generator, air serves as a transmission medium and is received by the nano-silver coating in the mask, then the negative ions are directly guided into the skin, meanwhile, various beautifying nutritional factors are rapidly guided into the deep layer of the skin together, and the effect of rapidly improving the skin state can be achieved. The mask has extremely high effects of maintaining beauty, keeping young, repairing radiation, resisting aging and removing wrinkles, and has important economic value.

The present application discloses a humidification structure and an air conditioner and air conditioner control method using the structure, belonging to the field of air conditioning humidification technology, including a wet film humidifier and a humidification circulation mechanism arranged at the bottom of the wet film humidifier, the humidification circulation mechanism including a water storage tank, a top cover, a water pump and a water pipe, the interior of the water storage tank is connected with a baffle plate, the top of the water treatment tank is provided with a downwardly concave arc surface concave part, the center of the arc surface concave part is provided with a large notch part, the inner wall surface of the water treatment tank and the water outlet and the surface of the arc surface concave part are coated with a layer of nano silver coating. The present application can perform surrounding sterilization treatment on the water in the humidification structure before the humidification structure releases water vapor for humidification into the room, thereby greatly reducing the number of bacteria released into the neonatal ward of the hospital during the air conditioning humidification process, meeting the requirements of the neonatal ward for sterility, and ensuring the health and safety of the newborns.

The invention relates to the technical field of decorative films, in particular to an antibacterial mildew-proof high-flash glitter powder film material and a preparation method thereof.The preparation method comprises the following steps that S1, a two-way stretching PET film base material is taken, subjected to surface cleaning and dust removal, corona treatment and preheating, then subjected to vacuum evaporation to form a silver layer, cooled and taken out of a cabin, and a silver-plated PET film is obtained; s2, adding a terpolymer into deionized water, carrying out ultrasonic dispersion, adding a waterborne polyurethane binder, stirring, adding glitter powder, and continuously stirring to obtain functional coating slurry; and S3, uniformly coating the surface of the silver-plated PET film with the functional coating slurry, drying with hot air, irradiating and curing the coating by using a UV lamp, and carrying out heat setting treatment and rolling in a nitrogen atmosphere to obtain the silver-plated PET film. The antibacterial mildew-proof high-flash glitter powder membrane material prepared by the preparation method disclosed by the invention has good optical performance and also has good antibacterial performance.

The present invention provides an automatic end silver coating and clamping machine for the production of capacitor core groups, which includes a vibrating tray, a workbench, and a handling mechanism. The handling mechanism includes a Y-axis servo module, a flipping assembly, handling fingers, and an X-axis servo module. The workbench is provided with a slurry scraping mechanism for silver coating the end of the core group, a clamping mechanism for pressing and forming the end of the core group and the electrode plate, a material conveying mechanism, and a tooling blanking mechanism, which includes a slicing die, a sheet taking mechanism, a sheet feeding mechanism, and a downward pressing and bending machine. When silver coating the end of the core group in the present invention, the silver coating amount on the end of the core group is large, the coating is uniform, the connection area with the electrode at the end of the core group is increased, the connection tightness between the core group and the electrode plate is good, the bonding strength is high, and it is not easy to fall off, ensuring the silver paste coating quality on the end of the core group; the number of silver coating times on the end of the core group is increased, the thickness of the silver paste at the end is increased, the connection reliability is improved, and the capacitance value drift and the failure of no capacitance of the mica capacitor are avoided.

The application relates to the field of four-silver coated glass, and particularly discloses a colorless four-silver LOW-E glass, which comprises a glass substrate and a composite film layer deposited on the surface of the glass substrate; the composite film layer is a four-layer silver coating structure formed by compounding SiNx, AZO, NiCr, Ag, ZnAlOx and ZnSnOx in a predetermined order; the thickness of each film layer is accurately controlled; the glass obtained has the following parameters: the glass surface color parameters are Rg=5.7, a*=-0.8 and b*=0.8; the film surface color parameters are Rf=3.9, a*=-1.4 and b*=-0.7; the visible light transmittance T is 67.5%; and the transmittance color parameters are a*=-4.5 and b*=-4.5. The glass surface and the film surface are both colorless, the glass has high light transmittance, and the colorless appearance and the optical transmittance performance are both considered.

This application provides a conductive polyimide film and its preparation method, belonging to the field of conductive materials. The method involves preparing a polyamic acid solution, mixing surface-coated rod-shaped silver powder with the polyamic acid solution, and then performing a casting process followed by gradient heating to obtain a polyamic acid film enriched with rod-shaped silver powder at the bottom. The rod-shaped silver powder-rich surface of the obtained polyamic acid film is then subjected to an ion exchange reaction with a silver nitrate solution. The ion-exchange film is then cleaned and subjected to thermal imidization treatment to obtain the conductive polyimide film. This application utilizes the ion exchange reaction and subsequent thermal curing process to reduce silver ions on the film surface, forming a silver-plated layer with excellent adhesion and conductivity. This material exhibits excellent reliability during use; even if the surface silver-plated film partially peels off due to wear, the conductive network built by the rod-shaped silver powder at the bottom can still serve as a backup conductive path, significantly improving its long-term stability in practical applications.

A method for producing a silver coating on a glass pane, wherein the silver coating includes at least one busbar and / or at least one solder contact surface, wherein the method includes printing the silver coating onto the glass pane by screen printing with a printing pattern having printing and non-printing regions and baking the printed silver coating, wherein the printing region of the printing pattern for the busbar and / or the printing region of the printing pattern for the solder contact surface is provided at least partially with a dot matrix or a line matrix.

The invention discloses a preparation method of silver-coated copper slurry suitable for TOPCON, and relates to the technical field of battery preparation, and the preparation method comprises the following steps: preparing silver-coated copper particles; silver-coated copper particles are mixed with a glass system, an organic system and nanoscale silver particles according to the mass ratio to prepare silver-coated copper slurry; the silver-coated copper particles sequentially comprise a copper core, an aluminum oxide protection layer, a nickel layer and a nano-silver coating layer from inside to outside, and the silver-coated copper slurry is formed by mixing the silver-coated copper particles, a glass system, an organic system and nano-scale silver particles according to a mass ratio. The glass system is composed of bismuth oxide-boric oxide composite glass, zinc oxide-silicon oxide composite glass and tellurium oxide glass. According to the invention, the silver-coated copper particles with a multi-layer coating structure are used as a main conductive phase and are combined with the nano-silver particles, so that the conductive performance is ensured, the raw material cost of the paste is reduced, the cost pressure is dealt with, the problems of copper core oxidation and ion migration are solved, and the paste can be kept stable in a high-temperature and high-humidity environment.