931 results about "Conductive paste" patented technology

The invention provides conductive paste, a solar cell, a preparation method of the solar cell and a photovoltaic module. The conductive paste comprises the following components in parts by weight: 70-85 parts of silver powder, 3-8 parts of glass powder, 0.1-2 parts of an additive and 12-25 parts of an organic carrier, wherein the silver powder comprises spherical silver powder and flaky silver powder; the glass powder is prepared from the following components in parts by weight: 65 to 75 parts of Bi2O3, 18 to 25 parts of TeO2 and 8 to 12 parts of V2O5; the additive is a carbon material and / or conductive metal oxide nanoparticles; the organic carrier comprises an infrared absorbing material; the infrared absorption material is selected from any one or more of copper phthalocyanine, a polyaniline-carbon nanotube compound and a tungsten oxide nanowire. The conductive paste can improve the conductivity of the conductive paste and improve the efficiency of the conductive paste in a laser sintering process, so that the contact resistivity is reduced, and the photoelectric conversion efficiency of a photovoltaic solar cell is improved.

The invention provides base metal conductive paste for a photovoltaic cell and a preparation method, a use method and application thereof, and the conductive paste comprises the following components in percentage by mass: 5-60wt% of oxide coated base metal powder, 27-77wt% of silver powder, 2-5wt% of glass powder, 0.1-3wt% of an antioxidant aid and the balance of an organic carrier; wherein the base metal powder comprises one or more of copper, tungsten, tin, nickel, aluminum and alloy powder of the copper, the tungsten, the tin, the nickel, the aluminum and the alloy powder of the aluminum, and the oxide comprises one or more of silicon oxide, aluminum oxide, titanium oxide and boric oxide. The base metal powder coated with a specific type and a proper amount of oxide is selected and matched with the oxide and the glass powder which are good in compatibility, the manufacturing cost of the conductive paste and the battery can be effectively reduced, meanwhile, the conductive paste is applied to TOPCon and BC batteries, and the battery conversion efficiency can be kept equivalent to or even superior to that of traditional pure silver conductive paste.

The utility model discloses a premixing tank for carbon nano tube conductive slurry, which comprises a cooling jacket, a kettle body is arranged in the cooling jacket, a stirring support, a liquid feeding hole, a powder feeding hole and a spraying ball assembly are arranged at the upper part of the kettle body, a stirring device is arranged in the kettle body, the stirring device comprises a low-speed helical ribbon stirrer and a high-speed shearing stirrer, a stirring shaft of the high-speed shearing stirrer penetrates through a hollow shaft of the low-speed helical ribbon stirrer and is directly connected with the high-speed driving motor, and the hollow shaft of the low-speed helical ribbon stirrer is driven by the low-speed driving motor and the speed reducer. The premixing tank solves the problems of agglomeration of carbon nanotube powder, inconsistent upper and lower uniformity, material adhesion on the kettle wall, uneven overall temperature and the like in the existing mixing tank, effectively avoids uneven mixing caused by long-term adhesion of the material on the kettle wall, can scrape off the material adhered on the kettle wall when discharging the material, reduces material residues, and improves the production efficiency. And the device can be widely applied to mixing occasions of carbon nanotubes and other slurries.

The invention belongs to the field of conductive paste preparation, and particularly discloses conductive paste containing ruthenium oxide and a preparation method of the conductive paste. The conductive paste is prepared from the following components in percentage by mass: 40 percent to 50 percent of ruthenium oxide, 3.8 percent to 5 percent of carbon nano tubes, 5 percent to 10 percent of PbO-B2O3-SiO2, 3 percent to 8 percent of ethyl cellulose, 21 percent to 28 percent of terpilenol, 9 percent to 12 percent of butyl carbitol, 0.7 percent to 1 percent of ammonium polyacrylate and 1 percent to 2 percent of dibutyl phthalate. According to the preparation method, ruthenium oxide is activated in vacuum, a mixed solvent is combined after dispersion, and a ball milling and ultrasonic dispersion synergistic process is adopted, so that the slurry is uniformly dispersed and has excellent stability. According to the invention, a ruthenium oxide-carbon nanotube-frit ternary synergistic system is constructed, and terpilenol and butyl carbitol in a specific mass ratio are taken as a mixed solvent, so that the problems of insufficient conductivity and easy agglomeration of traditional paste are effectively solved, and the method can be widely applied to manufacturing of high-precision electronic devices.

The invention discloses multi-solvent synergistically activated low-temperature semi-sintered copper paste and a preparation method and application thereof, and belongs to the technical field of conductive paste. The multi-solvent synergistically activated low-temperature semi-sintered copper slurry comprises the following raw material components in percentage by mass: 82-88% of conductive filler, 2-3% of a resin carrier, 4-7% of an activating solvent, 4-7% of a dispersing solvent and 2-3% of a curing agent. Through cooperation of multiple solvents, full-stage activation of the copper particles is achieved, pre-connection and sintering of the copper particles before resin is completely crosslinked and cured are promoted, densification of the overall structure is improved, the insulation barrier effect of the resin is effectively avoided, the resistivity is reduced, meanwhile, inhibition of the resin on sintering of the copper particles is solved, and the service life of the copper particles is prolonged. And good balance between conductivity and interface adhesion is realized. Through resin curing, chemical bonding between the slurry and the substrate can be enhanced, a metal bond network among copper particles is expanded, and mechanical connection stability and electrical performance are guaranteed.

The present disclosure provides a low-temperature conductive paste and a raw material composition thereof, and a heterojunction cell electrode and a manufacturing method therefor. The raw material composition comprises the following components in percentage by mass: 2%-10% of a composite resin, 2%-4% of an organic solvent, 0.2%-1% of an auxiliary agent, and 85%-94% of conductive metal powder. The resin comprises a component A and a component B. The component A comprises a polyol and a blocked isocyanate. The component B comprises a curing agent and a resin. The present disclosure further provides a low-temperature conductive paste prepared from the raw material composition, a heterojunction cell electrode manufactured from the low-temperature conductive paste, a manufacturing method for the electrode, and a heterojunction cell manufactured from the electrode. The low-temperature conductive paste and the heterojunction cell electrode provided by the present disclosure have high conductivity and weather resistance.

The invention discloses a conductive paste, a metallized substrate and a metallization process for manufacturing the metallized substrate, the conductive paste comprises metal particles, the particle size of the metal particles is 0.1-10 [mu] m, and the mass ratio of the metal particles is 80-98%; in the metallization process, a copper layer is arranged on the hole wall of a through hole or a blind hole of a substrate, then conductive slurry is filled in the hole with the copper layer, heating sintering treatment is carried out, and after heating sintering is carried out in an inert gas atmosphere at the temperature of less than or equal to 300 DEG C, metal particles can be fused to form a connection structure or a eutectic structure. A reinforcing layer can be formed between the nano metal particles and the copper layer, and the reinforcing layer is a metal bonding layer or an intermetallic compound layer. The metallization mode is suitable for a through hole or a blind hole of a glass / silicon / ceramic substrate with a high aspect ratio and a micro aperture, and the technical problems that complete filling is difficult to achieve and filling defects exist in an existing electroplating process, the electrical resistivity of conductive paste is high, and the interface bonding force is insufficient can be solved.

The invention relates to a conductive paste for a multiphase alloying photovoltaic cell, a preparation method and application thereof, and belongs to the technical field of photovoltaic device manufacturing, and the conductive paste comprises the following components by mass: 25-35% of silver-coated copper powder, 10-20% of silver-coated copper powder, 10-20% of copper powder, and 10-20% of copper powder. 45%-55% of composite tin alloy powder; 10%-20% of an organic carrier; the composite tin alloy powder is composed of at least two kinds of tin alloy powder with different melting points; in the sintering and curing process of the conductive paste, metallurgical bonding is formed between the silver-coated copper powder through gradient melting of the tin alloy powder with the different melting points. Silver-coated copper powder is adopted to replace pure silver to serve as a conductive main framework, and a large amount of tin alloy is combined to serve as a connecting base body. The low-cost advantage of the copper core and the excellent conductivity of the silver shell are utilized, so that the cost of the paste is greatly reduced, and meanwhile, the excellent electrical property is ensured.

The invention relates to the technical field of lithium ion batteries, in particular to a system and method for detecting the conductivity of lithium ion battery conductive paste, comprising a detection bin, conductive paste spraying mechanisms are fixedly connected to the left and right sides of the bottom of the inner wall of the detection bin, and a detection mechanism is fixedly connected to the bottoms of the inner sides of the two conductive paste spraying mechanisms. By arranging the detection mechanism and the conductive slurry spraying mechanism, efficient and accurate detection of the conductivity of the conductive slurry of the lithium ion battery is realized, uniform spraying and accurate detection of the conductive slurry are realized through fine mechanical structure design, and meanwhile, the conductivity of the conductive slurry is accurately detected through detailed detection method steps. The standard and accuracy of the detection process are ensured, the stability and reliability of the conductive slurry in different working environments are further evaluated through conductivity performance at different temperatures, and in addition, the system also has the characteristics of high automation and intelligence.

The invention discloses conductive paste, a preparation method thereof and a radio frequency identification tag. The conductive paste comprises the following raw materials in parts by mass: 30-40 parts of spherical silver powder, 3-6 parts of carbon nanotubes, 20-30 parts of a resin adhesive, 40-50 parts of a diluent and 2-4 parts of a dispersant, the resin adhesive comprises polyurethane resin and an organosilicone modified acrylate monomer in a mass ratio of (8-9): (1-2), and the organosilicone modified acrylate monomer is obtained by hydrosilylation of a hydroxyl acrylate monomer and a hydrogen-containing silane compound in a molar ratio of (1.0-1.1): 1. According to the invention, the contradiction between the conductive performance and fluidity and the product flexibility of the conductive paste can be effectively solved, and the RFID product with high conductivity, printing quality and mechanical flexibility can be prepared.

The invention discloses conductive paste for a BC battery and a preparation method of the conductive paste, and relates to the technical field of photovoltaic battery manufacturing, and the conductive paste is prepared from the following raw materials in parts by weight: 45-65 parts of Cu-coated Ag powder, 3-8 parts of gradient functional glass powder, 5-8 parts of a synergist, 30-40 parts of an organic carrier and 2-4 parts of a dispersant. The gradient functional glass powder is composed of an inner layer high corrosion phase PbO-B2O3-ZnO system and an outer layer slow release phase SiO2-Al2O3-ZrO2 system, and the mass ratio of the inner layer to the outer layer is 3: 1. The conductive paste for the BC battery is small in contact resistance, low in single-chip consumption, good in windowing effect and high in conversion efficiency when being applied to the BC battery.

The invention discloses high-conductivity low-temperature sintering composite copper paste and a preparation method and application thereof, and belongs to the technical field of conductive paste. The composite copper paste consists of the following components in percentage by mass: 70-90% of a conductive phase, 2-10% of a binding phase and the balance of an organic carrier. Wherein the conductive phase comprises cuprous hydride modified copper powder and a copper complex; the copper complex is formed by a copper compound and an organic ligand through a coordination reaction. The copper paste can be sintered to form an electrode or a circuit in a nitrogen atmosphere at a temperature of less than or equal to 300 DEG C, and has the advantages of low resistivity, good oxidation resistance, strong adhesion and the like, and the cost of the copper paste is obviously lower than that of silver paste. The invention also provides a preparation method of the composite copper paste and an application of the composite copper paste in preparation of an electronic component electrode or a conductive circuit.

To provide a laminated substrate capable of ensuring a long-term reliability by preventing stress from being applied to a conductive paste for electrical connection when the laminated substrate is manufactured by laminating a plurality of multilayer substrates.SOLUTION: In a laminated substrate 100 formed by laminating a plurality of multilayer substrates 10, in each multilayer substrate 10, a through hole 30 penetrating through each multilayer substrate 10 and having an inner wall surface plated and filled with a resin 32 therein, and bonding lands 34 electrically connected to the through hole 30 are formed on an upper surface and a lower surface of the through hole 30. An insulating adhesive layer 40 and a conductive paste via 50 for electrically connecting the bonding lands 34 of the opposed multilayer substrates to each other by a conductive paste filled in a through hole 46 formed in the insulating adhesive layer 40 are provided between the multilayer substrates 10, and the conductive paste via 50 is provided at a position different from the position where the through hole 30 is formed.SELECTED DRAWING: Figure 1

The present invention discloses a tellurium-lead-lithium oxide glass powder for BC cell N-region conductive paste and its preparation method, belonging to the field of photovoltaic silver paste. The glass powder adopts components with high Pb, Te, and Li: aTeO2 - bPbO - cLi2O - dBi2O3 - eWO3 - fZnO - gSiO2 - hNa2O; where a + b + c + d + e + f + g + h = 1, 0.2 < a < 0.4, 0.1 < b < 0.4, 0.1 < c < 0.25, 0 < d < 0.1, 0 < e < 0.1, 0 < f < 0.1, 0 < g < 0.1, 0 < h < 0.05, and a + b > 0.5, and the ratio of c to h is (3 - 10):1. By controlling the specific Pb, Te, and Li contents and the specific Li / Na ratio in the present invention, a strong corrosion effect on the poly layer of the cell is achieved, enabling more silver ions dissolved in the glass liquid to recrystallize on the surface of the silicon wafer, thereby achieving good ohmic contact.

The invention relates to the technical field of conductive agents, and particularly discloses graphene carbon nanotube composite conductive paste for a high-voltage electrode and a preparation method of the graphene carbon nanotube composite conductive paste. The graphene carbon nanotube composite conductive paste for the high-voltage electrode is prepared from the following raw materials in parts by weight: 2 to 6 parts of carboxylated single-walled carbon nanotube powder, 1 to 3 parts of fluorinated modified graphene powder, 0.6 to 1.2 parts of superfine carbon black, 2 to 4 parts of an ionic liquid dispersing agent, 0.2 to 0.4 part of a rheology modifier and 80 to 100 parts of N-methyl pyrrolidone. According to the graphene carbon nanotube composite conductive paste for the high-voltage electrode, the breakdown field strength can be remarkably improved, partial discharge is inhibited, and high conductivity is kept while the high-voltage service life is prolonged.

The invention provides a coil component. The coil component is provided with a terminal electrode, the terminal electrode is provided with a conductor film formed by a sintered body of conductive paste on a mounting surface facing a mounting substrate side in a core body, and the fixing strength of the terminal electrode is improved in the coil component. The attachment surfaces (9, 10, 13, 14) are provided with protrusions (17-20) having the apexes (21-24) positioned further inward than the edges of the attachment surfaces in the width direction orthogonal to the axial direction of the winding core part, and the protrusions are formed with inclined surfaces (27-30) extending so as to become lower from the apexes toward the edges. When a conductive paste to be used as a conductive film (37-40) is applied to a mounting surface, for example, by an immersion method, since the mounting surface is provided with a raised portion, the thickness of the conductive paste applied can be increased, and a conductive film comprising a sintered body of the conductive paste can be formed thicker. Therefore, the fixing strength of the terminal electrodes (33-36) with the conductor films relative to the mounting surface can be improved.

The invention provides a conductive paste and a preparation method and application thereof, and the conductive paste comprises 84-91 wt% of a conductive phase, 0.8-5.2 wt% of a glass phase, 4-11 wt% of an organic carrier, 0.1-3 wt% of a dispersant, and the balance of a solvent. The conductive phase comprises 5-60 wt% of nickel alloy powder and 40-95 wt% of silver powder, the nickel alloy powder comprises at least one nickel alloy compound, the nickel alloy compound has a general formula of Ni-alpha-beta-gamma, alpha, beta and gamma are three non-nickel elements which are different from one another, and the sum of the alpha, the beta and the gamma is 100%. The elements alpha, beta and gamma are respectively selected from any one of transition metal, rare earth metal, alkaline earth metal and other non-nickel elements, the mass content of the nickel element is 10-99 wt%, and the sum of the mass content of the elements alpha, beta and gamma is 1-90 wt%. Nickel elements and non-nickel elements alpha, beta and gamma in a proper mass ratio are screened to form nickel alloy powder, so that the physical and chemical properties of the nickel alloy powder are improved, the ratio of the nickel alloy powder for replacing silver powder is increased, the electrical properties in the conductive slurry can be guaranteed, and the cost of the slurry is remarkably reduced.

The invention discloses a micro-jet homogenizer for preparing conductive slurry, and belongs to the technical field of battery materials. The device mainly comprises a micro-jet interaction cavity, the micro-jet interaction cavity comprises a shell and a core rod, the shell comprises a first barrel and a second barrel which are sequentially connected in the axial direction of the shell, the first barrel and the second barrel are detachably connected, and inner cavities of the first barrel and the second barrel are communicated to form a fluid channel extending in the axial direction of the shell. The two ends of the shell are provided with an inlet and an outlet which are connected with the two ends of the fluid channel respectively, the core rod is contained and installed in the fluid channel, the two ends of the core rod are provided with a first collision unit and a second collision unit respectively, and the first collision unit and the second collision unit can be selectively opposite to the inlet of the fluid channel. The microjet homogenizer for preparing the conductive slurry can be conveniently maintained, the service life is prolonged, and the use cost is reduced.

The invention discloses low-temperature anti-oxidation conductive copper paste, a preparation method and an RFID tag, and relates to the field of conductive paste. The modified copper powder comprises: copper powder; the cysteamine self-assembly molecular layer is formed by coupling sulfydryl of cysteamine with the surface of the copper powder; the metal phthalocyanine complex molecular layer is coordinated with central metal ions of metal phthalocyanine molecules through amino groups of cysteamine and is connected to the surface of the cysteamine self-assembled molecular layer; and the conductive copper paste is sintered at 140-170 DEG C. According to the low-temperature curing conductive copper paste, the problem of anti-oxidation defects of the copper powder can be effectively solved while the conductivity of the copper powder is ensured, and the low-temperature curing conductive copper paste with long-acting anti-oxidation performance and high conductivity is obtained.

The invention discloses a compensation printing method for resistance deviation of a vehicle-mounted optical glass printing heating wire, and relates to the technical field of functional material printing. On one hand, a prediction model based on individual physical characteristics of a vehicle-mounted optical glass substrate and conductive slurry is constructed before printing; according to the method, most printing deviation can be predicted and inhibited from the source, traditional passive error correction is converted into active prevention, the consistency and the qualified rate of resistance values of final products are improved, on one hand, actual measurement data of the final products are fed back to an initial prediction model for calibration, and on the other hand, the accuracy of the final products is improved; the whole printing method can be continuously optimized along with production, the adaptability to material batch fluctuation, environment change and small aging of equipment is enhanced, the dependence on artificial experience is reduced, the long-term stability of product quality is guaranteed, and on the other hand, through innovative combination of physical pre-compensation and energy fine adjustment, the production efficiency is improved. And a cooperative compensation effect is shown.

The invention relates to the technical field of solar cells, and particularly discloses conductive paste for a solar cell, a preparation method of the conductive paste and an electrode. The conductive paste for the solar cell comprises the following components in percentage by weight: 88%-92% of carbon-based nano-copper particles, 4%-6% of glass powder and 4%-6% of an organic additive, the carbon-based nano-copper particles are prepared by reacting copper chloride with glucose and then calcining, the particle size is 52-100nm, and copper oxidation is inhibited by using a carbon layer; the organic additive is composed of a stabilizer, resin and an organic solvent according to a ratio of 1: 3: 9. The conductive material is prepared by mixing, dispersing, grinding and filtering, and can be prepared into a solar cell conductive material by silk-screen printing and high-temperature sintering. The conductive paste is low in cost, high in oxidation resistance and excellent in conductivity, and can replace silver paste to reduce the manufacturing cost of the solar cell, improve the performance and prolong the service life.

The invention discloses tellurium-lead-lithium oxide glass powder for BC battery N-region conductive paste and a preparation method of the tellurium-lead-lithium oxide glass powder, and belongs to the field of photovoltaic silver paste. The glass powder is prepared from components with high contents of Pb, Te and Li as follows: aTeO2-bPbO-cLi2O-dBi2O3-eWO3-fZnO-gSiO2-hNa2O, and the glass powder is prepared from components with high contents of Pb, Te and Li; wherein a + b + c + d + e + f + g + h = 1, 0.2 lt; a < lt >; 0.1 1t, 0.4, 0.1 1t; blt; 0.1 1t, 0.4, 0.1 1t; clt; ct; 0.25, 0 lt; dlt; 0.1, 0 lt; lt, lt; 0.1, 0 lt; flt; 0.1, 0 lt; glt; 0.1, 0 lt; hlt; 0.05, a + b > 0.5, and the ratio of c to h is (3-10): 1. Through specific Pb, Te and Li content control and a specific Li / Na ratio, a strong corrosion effect on a poly layer of a battery piece is achieved, more silver ions dissolved in molten glass can be recrystallized on the surface of a silicon wafer, and thus good ohmic contact is achieved.

The invention provides an electrode grid line and a preparation method thereof and conductive slurry, the electrode grid line comprises a seed layer and a base metal layer superposed on the upper layer of the seed layer, the base metal proportion in the conductive phase of the base metal layer is greater than 68%, the seed layer comprises a main grid and a seed layer fine grid, the base metal layer comprises base metal layer fine grids electrically connected with the seed layer fine grids in a one-to-one correspondence mode, at least one of the seed layer fine grids and the base metal layer fine grids is further provided with a plurality of contact pins, and the contact pins are distributed in the length direction of the corresponding fine grids at intervals. And the width of the contact pin in the line width direction of the fine grid is greater than the line width of the fine grid. The electrode grid line with the preset height is formed in a grid stacking mode, base metal is utilized by the base metal layer, the overall silver consumption amount of the electrode grid line is effectively reduced, the part, exceeding the width of the thin grid line where the contact pin is located, of the contact pin arranged on the thin grid line can be used for compensating printing precision deviation, the precision requirement for printing operation is reduced, and the contact performance is improved.

The invention relates to a glass frit composition comprising: a) a first glass frit and b) a second glass frit, the first glass frit comprising 30 to 50 mol% TeO2, 15 to 35 mol% Li2O, 5 to 30 mol% of at least two oxides selected from the group consisting of SiO2, Bi2O3, Na2O, K2O, SrO, CaO, ZnO, MoO3, WO3 and Cu2O, greater than 0 and less than 5 mol% of at least one oxide selected from the group consisting of MgO, Al2O3, Yb2O3, Ta2O5, Y2O3, ZrO2, CeO2 and BaO, 0 to 25 mol% PbO, 0 to 10 mol% B2O3 and 0 to 10 mol% fluorine-containing compounds, wherein the mole percentage is based on the total mole number of all compounds in the first glass powder; wherein the second glass frit comprises 10 to 35 mol% SiO2, 15 to 35 mol% PbO, 5 to 30 mol% of at least one oxide selected from the group consisting of Bi2O3, Na2O, K2O, SrO, CaO, ZnO, MoO3, WO3, Cu2O and B2O3, 0 to 40 mol% TeO2 and 0 to 15 mol% Li2O, the molar percentages being based on the total moles of all the compounds in the second glass frit. The invention also relates to a conductive paste containing the glass powder composition.

The invention provides high-stability double-layer core-shell coated pure copper silver-substituted conductive paste and a preparation method thereof, and belongs to the technical field of electronic special materials. The copper-resistant coating comprises the following components in percentage by mass: 82%-90% of antioxidant copper powder with a double-layer core-shell structure, 3%-6% of bismuth-boron-zinc lead-free low-melting-point glass powder, 3%-7% of a modified epoxy resin compound organic carrier, 2%-5% of a gradient volatilization compound solvent and 0.5%-2% of a special compound additive for copper. Through the double-layer core-shell copper powder design of inner-layer nano-silver passivation and outer-layer organic composite coating and in cooperation with a liquid-phase synergistic anti-oxidation system, the volume resistivity after slurry curing is smaller than or equal to 3.5 * 10 <-5 > omega.cm, the resistivity change rate after 1000-hour damp-heat aging at 85 DEG C / 85% RH is smaller than or equal to 10%, the normal-temperature storage period without opening a tank is larger than or equal to 6 months, direct curing can be conducted in the conventional air atmosphere of 120-160 DEG C, and the high-temperature-resistant copper paste can be applied to the field of high-temperature storage. The silver paste is completely compatible with production and application production lines of existing silver paste, equipment transformation is not needed, the comprehensive cost is reduced by more than 80% compared with pure silver paste, and the silver paste can be widely applied to the fields of PCBs, membrane switches, flexible electronics, photovoltaic back electrodes, LED packaging and the like.

The invention provides a glass powder composition, base metal conductive paste, a preparation method and application, and the glass powder composition comprises the following components in percentage by weight: 10 to 80 percent of TeO2, 10 to 70 percent of PbO, 0 to 70 percent of Bi2O3, 0 to 20 percent of Li2O, 0 to 20 percent of WO3, 0 to 20 percent of ZnO, 0 to 30 percent of SiO2, 0 to 10 percent of Na2O and 1 to 20 percent of Cu2S. Through reasonable design of components and content of the glass powder, the transition temperature (Tg) of the glass powder composition is relatively increased, atomic diffusion is inhibited, glass active components are prevented from being consumed too early, the etching effect of the glass powder on a silicon wafer is guaranteed, and good ohmic contact is formed; the high-conductivity copper can assist in enhancing the conductivity of a base metal conductive system, and the conductivity of the sintered slurry is improved; on the other hand, in the initial stage of sintering, Cu2S can preferentially react with a base metal material, so that consumption of the base metal to active ingredients of the glass powder composition is reduced, the good activity of the glass powder is kept, and the contact performance of an electrode is improved.

The invention relates to the technical field of flexible electronic sensors, in particular to a large-strain interdigital capacitive sensor based on liquid metal conductive paste, which comprises a flexible substrate, and the flexible substrate comprises a bottom packaging layer and a top packaging layer integrally connected to the upper surface of the bottom packaging layer. A liquid metal interdigital electrode is embedded between the bottom packaging layer and the top packaging layer, the liquid metal interdigital electrode is formed after liquid metal conductive paste is subjected to laser ablation patterning, the end of the liquid metal interdigital electrode is connected with a flexible wire, and one end of the flexible wire extends to the outside of the flexible substrate; the liquid metal conductive slurry is paste conductive slurry which is rich in oxide and is formed by mechanically stirring and oxidizing liquid metal; the liquid metal is gallium-based liquid metal; the problems that an existing flexible strain sensor cannot meet the large strain measurement requirement and is poor in stability and complex in preparation process are solved.

This invention discloses a process for preparing flake-shaped silver-coated copper powder, comprising the following steps: S1, preparing a dispersant; S2, preparing flake-shaped copper powder; S3, preparing flake-shaped silver-coated copper powder. This invention, through precise control of the reaction and the preparation of an effective dispersant system, precisely controls the morphology, particle size, and silver plating amount of the flake-shaped copper powder, and also provides a silver-coated copper powder electronic conductive paste that can be sintered in air.

The invention relates to conductive paste and a preparation method thereof, a solar cell and a preparation method thereof, and a photovoltaic module. The conductive paste comprises 82%-88% of metal powder, 1%-5% of glass powder, 8%-15% of an organic carrier, 0.5%-3% of a wave-absorbing material and 0.1%-1% of a polymer pore-forming agent, and the wave-absorbing material can absorb laser and release heat. During laser-assisted sintering treatment, the wave-absorbing material can efficiently absorb laser energy and instantly release heat, so that the surrounding polymer pore-forming agent is quickly gasified. After the polymer pore-forming agent is gasified, a cavity structure is formed in the conductive slurry, a multi-reflection cavity of light is formed, laser which is subsequently transmitted in is reflected for multiple times in the cavity, a light path is prolonged, and the absorption rate of laser energy is greatly improved. Due to the high absorptivity of the laser, the laser power required by good ohmic contact is formed, the energy consumption is reduced, and the damage to the surface of the battery is reduced.

The invention provides low-temperature base metal conductive paste and a preparation method and application thereof.The low-temperature base metal conductive paste comprises 86 wt%-90 wt% of a conductive phase, 3 wt%-6 wt% of resin, 0.1 wt%-0.5 wt% of a curing agent, 0.1 wt%-1 wt% of a dispersing agent, 0.1 wt%-3 wt% of an antioxidant, 0.8 wt%-1.4 wt% of an anti-settling agent and the balance solvent, the conductive phase comprises 30-60 wt% of first-class tin-coated copper powder, 10-30 wt% of second-class tin-coated copper powder and 30-60 wt% of pure copper powder, the first-class tin-coated copper powder is spheroidic and / or blocky and has an average particle size D1, the second-class tin-coated copper powder is flaky and has an average particle size D2, the pure copper powder has an average particle size D3, and D1 / D2 is larger than or equal to 0.5 and smaller than or equal to 1, and D1 / D3 is larger than or equal to 6 and smaller than or equal to 16.7. The tin-coated copper powder with different morphologies is matched according to a specific mass ratio and a specific particle size ratio and is further compounded with the pure copper powder according to a ratio, so that a conductive phase system with dense powder accumulation is formed, the electrode resistivity is reduced, metal silver does not need to be used, the dependence of conductive paste on a conductive network formed by silver powder is eliminated, and the remarkable cost reduction effect is achieved.