58results about How to "Low resistivity" patented technology

The invention relates to the technical field of low-resistance conductive materials, and particularly discloses a base particle vortex mediated near-room-temperature ultralow-resistance material which comprises a main body material and a regulating medium, the main body material is a doped transition metal oxide or a carbon-based composite material; the regulation and control medium is a low-atomic-weight doping agent; the doped transition metal oxide is La-doped SrTiO3 or Nb-doped TiO. Compared with a traditional copper conductor, the material has the advantages that the resistance is obviously reduced, the energy loss in the electron transmission process can be greatly reduced, the energy efficiency of electronic equipment and new energy equipment can be obviously improved, the material can adapt to the environment temperature change of most indoor and outdoor engineering application scenes, and the application prospect is wide. The problem that part of low-resistance materials are poor in temperature stability is solved, the reliability of long-term operation of devices is guaranteed, conventional processes and equipment such as magnetron sputtering, spin coating and pyrolysis, tube furnace doping and mechanical bending are adopted in the whole process, the operation process is clear and easy to understand, and large-scale production can be achieved in common material laboratories or small and medium-sized production workshops.

The embodiment of the present disclosure provides a preparation method of a semiconductor device, which comprises: providing a substrate, the substrate having a shallow trench isolation structure therein; forming a word line trench in the shallow trench isolation structure, the word line trench being provided with a gate insulation layer on the sidewall; forming a titanium nitride blocking layer, the titanium nitride blocking layer covering the surface of the gate insulation layer; and depositing a metal molybdenum gate, the metal molybdenum gate being selectively deposited on the titanium nitride blocking layer. The preparation method utilizes the property of selective deposition of the metal molybdenum gate, so that the metal molybdenum gate is only deposited on the titanium nitride blocking layer and is not deposited on other structures, thereby eliminating the need for an additional etching back step, simplifying the preparation process, reducing the process difficulty, and the resistivity of the metal molybdenum gate is lower than that of a TIN / W film, which is conducive to reducing the gate resistance and improving the performance of the semiconductor device.

The invention discloses an aluminum beryllium enhanced high-conductivity heat-resistant aluminum alloy material and a preparation method thereof, and belongs to the technical field of metallurgical wire rod processing. The aluminum beryllium enhanced high-conductivity heat-resistant aluminum alloy material is prepared from the following components in percentage by weight: 0.12 to 0.16 percent of Si, 0.15 to 0.35 percent of Fe, 0.005 to 0.10 percent of Cu, 0.35 to 0.85 percent of Zr, 0.2 to 0.45 percent of Y, 0.15 to 0.35 percent of Er, 0.005 to 0.03 percent of B, 0.001 to 0.02 percent of Ti, 0.03 to 0.05 percent of Be, less than or equal to 0.5 percent of other impurities and the balance of Al. According to the aluminum alloy single wire, the specific raw material composition is adopted, namely, multiple elements such as Zr, Y, Er and Be are compositely added, and the proportion of the elements is strictly controlled, so that the prepared aluminum alloy single wire achieves synergistic improvement of high strength, high conductivity and excellent heat resistance.

The application discloses a manganese iron lithium phosphate composite positive electrode material with Mn ion self-compensation and multiple interception functions and a preparation method thereof. The manganese iron lithium phosphate composite positive electrode material is composed of a manganese iron lithium phosphate positive electrode material and functional composite film micro-powder loaded on the surface and between the particles of the manganese iron lithium phosphate positive electrode material. The functional composite film of the functional composite film micro-powder is prepared from Na-merolite powder through Mn ion exchange, grafting and copolymerization, lithiumation and PVA composite film preparation. The manganese iron lithium phosphate composite positive electrode material is prepared from the manganese iron lithium phosphate positive electrode material and the functional composite film through mixing, crushing and freeze-drying. The manganese iron lithium phosphate composite positive electrode material realizes the inhibition of the dissolution of Mn 2+ in the manganese iron lithium phosphate positive electrode material from the source, improves the ion conduction performance and the cycle stability of the manganese iron lithium phosphate positive electrode material, and has the advantages of high capacity, long cycle life, high safety and the like.

This invention provides a modified aqueous negative electrode, its preparation method, and its application. The modified aqueous negative electrode includes a negative electrode current collector and a negative electrode active material layer disposed on the surface of the current collector. The negative electrode active material layer includes a negative electrode active material, a conductive agent, sodium alginate, waterborne polyurethane, and a pore-forming agent. The modified aqueous negative electrode of this invention solves both the raw material shortage problem of oil-based negative electrode formulations and the pain points of current aqueous negative electrode formulations, improving the slurry solids content, electrode porosity, and flexibility, while reducing electrode resistivity. Furthermore, this formulation is environmentally friendly, requiring no control of ambient humidity, and can significantly reduce production costs.

The invention discloses a super-soft and high-bulkiness melt-blown warm-keeping flocculus which is prepared from composite melt-blown fibers through airflow drafting, layered net forming and low-temperature shaping, and the composite melt-blown fibers comprise the following raw material components in percentage by weight: 10-15% of modified polylactic acid elastomer, 10-20% of polyester staple fiber, 10-20% of polyester staple fiber, 10-20% of polyester staple fiber, 10-20% of polyester fiber, 10-20% of polyester fiber, 10-20% of polyester fiber, 10-20% of polyester fiber, 10-20% of polyester fiber the content of the polypropylene melt-blown fiber is 65%-75%, the antistatic modifier is 1%-3%, and the softening agent is 0.5%-2%. The invention also discloses a preparation method of the melt-blown warm-keeping flocculus, the production process is simple, the raw materials in the formula are easy to obtain, and the production efficiency is high; the prepared warm-keeping flocculus is more excellent in warm-keeping performance, and compared with traditional warm-keeping materials such as down feather, cotton and cotton-like chemical fibers, the warm-keeping flocculus has the low-carbon and environment-friendly excellent comprehensive performance such as good compression resilience, water resistance, moisture absorption resistance, no caking after water washing, no reduction of the warm-keeping effect after outdoor water spraying and the like, and has a very wide application prospect.

This invention discloses a composite current collector, its preparation method, an electrode, and a battery, belonging to the field of lithium-ion battery technology. The composite current collector provided by this invention includes: a porous conductive matrix comprising a polymer and a first conductive filler dispersed in the polymer, prepared by differential roller stretching; a conductive layer disposed on at least one surface of the porous conductive matrix; and the conductive layer comprising a second conductive filler and a binder. The composite current collector of this invention achieves a significant reduction in electrode resistivity while maintaining excellent mechanical properties, effectively resolving the performance contradiction between lightweight and conductivity in traditional composite current collectors. The assembled lithium-ion battery exhibits high energy density, high cycle stability, and high safety.

This invention relates to the field of carbon composite materials, specifically providing a MOF-pitch-based porous carbon composite material, its preparation method, and its applications. The preparation method includes the following steps: doping a transition metal oxide and a nitrogen source into a MOF material to obtain a MOF precursor; mixing the MOF precursor with an amine crosslinking agent and oxidized pitch, followed by pre-carbonization and activation to obtain pitch-based porous carbon; and fluorinating the pitch-based porous carbon to obtain the MOF-pitch-based porous carbon composite material. The MOF-pitch-based porous carbon composite material prepared by this method possesses high pore volume, high crush strength, and high initial efficiency, exhibiting excellent electrochemical and electrical properties when used as a negative electrode material for lithium-ion batteries.

This invention provides a battery pack and an electrical device, relating to the field of battery technology. The battery pack includes multiple pouch cells and connecting tabs. Each pouch cell includes a cell, a casing, and a current output terminal. The current output terminal is bonded to and sealed to the casing. A first end of the current output terminal is electrically connected to a cell, and the connection forms the outer edge of the current output terminal. The connecting tab electrically connects the current output terminals of at least two pouch cells. The current output terminals are welded to the connecting tab to form a first welding area. The resistivity of the connecting tab is less than the resistivity of the current output terminals. Along the lead-out direction of the current output terminals, the length between the outer edge of the first end of the current output terminal and the first welding area along the current transmission direction forms a current-carrying length A mm. The resistivity of the connecting tab is T Ωmm² / m, and the thickness of any current output terminal is D mm. 0.6 ≤ AT / D ≤ 24.04. This technical solution solves the problem in related technologies where pouch cells cannot meet the requirements for high-rate charging and discharging.

The preparation method comprises the following steps: adding an alkaline reagent into a silver-containing leaching solution of a retired photovoltaic module to adjust the pH value to 3-5, carrying out solid-liquid separation after reaction to obtain an impurity-removed leaching solution, adding flake silver powder into the impurity-removed leaching solution, then adding a mixed solution of a dispersing agent and a reducing agent, and carrying out liquid-phase reduction reaction to obtain the micro-nano silver powder. And carrying out solid-liquid separation on the reacted slurry to obtain the micro-nano silver powder with lead on the surface. According to the preparation method provided by the invention, silver and lead in the retired photovoltaic silver-containing leaching solution can be effectively utilized, the micro-nano composite silver powder with high conductivity can be prepared in one step, and the preparation method is suitable for preparation of photovoltaic conductive silver paste and electronic packaging conductive silver paste.

The preparation method comprises the following steps: weighing raw materials for preparing the sputtering target material according to a preset stoichiometric ratio, mixing zinc oxide powder and manganese oxide powder in ethanol, carrying out wet grinding for 2-4 hours, adding Cu powder, W powder and Ta powder, continuously carrying out wet grinding for 1-20 hours, drying, and screening to obtain mixed nano powder; filling the mixed nano powder into a graphite mold, putting the graphite mold into a hot pressing furnace, carrying out hot pressing sintering in a vacuum environment at 900-1100 DEG C, cooling, demolding, taking the material, and machining to obtain a sputtering target material in a target shape; the special requirement of the blue light storage recording layer is focused, the optical performance is optimized through a ZnO doping system, the raw materials adopt a segmented grinding process, and the problems that raw material powder is agglomerated and metal powder is prone to sinking in the mixing process are solved; the obtained target material has the advantages of excellent resistivity (less than 50 * 10 <-4 > omega.cm) and high density (gt, 95%), the coating film transmittance of the prepared target material is more than 85%, and the requirement for a high-performance blue light storage recording layer is met.

The present application relates to a kind of cylindrical electrode paste and its preparation method.A kind of cylindrical electrode paste, by mass parts, including 15-20 parts of anthracite main material, 25-40 parts of residual anode, 3-10 parts of graphite fragment, 25-35 parts of coke, 15-30 parts of organic binder, 6-18 parts of bio-based binder. Among them, organic binder includes medium temperature pitch, anthracene oil, beta resin. Among them, bio-based binder includes carbonized hydrophobic composite modified wood bamboo powder, sodium carboxymethyl cellulose. The carbonized hydrophobic composite modified wood bamboo powder of the present application and sodium carboxymethyl cellulose are compounded to form a bio-based binder, which cooperates with the organic binder to ensure the bonding strength, high temperature resistance and electrical conductivity of the cylindrical electrode paste, while realizing the green and low-carbon utilization of biomass, solving the problems of high temperature failure, moisture absorption and easy caking, and many pores of traditional bio-based binder, reducing the resistivity and production cost, and improving the structural density and use stability.

This invention discloses a high-compact, high-capacity lithium iron phosphate cathode material and its preparation method. Using iron phosphate and iron hydroxide as a mixed iron source, a two-step synthesis method is employed. First, the two raw materials are ground to one large particle size and one small particle size. The large particle size is sintered at two different temperatures to prepare large and medium particles, while the small particle size is sintered at two different temperatures to prepare small and ultra-small particles. Then, the large and medium particles are mixed and ground to a large particle size, and the small and ultra-small particles are mixed and ground to a small particle size. The mixing of large and small particle sizes increases the particle size distribution, and sintering yields the high-compact, high-capacity lithium iron phosphate cathode material. The mixing and grinding of multiple particles in this invention further increases the particle size distribution and improves the compaction density of the cathode material. The use of a low-molecular-weight carbon source in the first sintering stage is beneficial for particle coating and improves particle roundness. The use of a high-molecular-weight carbon source in the second sintering stage constructs a continuous conductive network, ensuring the material's capacity is fully realized.

The invention discloses a current collector with a U-shaped metal sheet and a preparation method of the current collector, and relates to the technical field of batteries. The current collector comprises an organic film, and U-shaped metal sheets are arranged at the two corresponding ends of the organic film; the opening end of the U-shaped metal sheet wraps the organic film to form a composite body, and metal layers are arranged on the upper surface and the lower surface of the composite body. The preparation method of the current collector comprises the following steps: step 1: (1) coating the U-shaped opening end of the U-shaped metal sheet with a conductive adhesive; (2) bonding and curing two ends of the organic film and the opening end of the U-shaped metal sheet respectively to obtain a composite metal sheet base film; and 2, plating metal layers on the upper surface and the lower surface of the composite metal sheet base film to obtain the current collector. The current collector prepared by the method has good resistivity and tensile strength.

A semiconductor structure and its formation method are disclosed. The formation method includes: providing a substrate, forming a dielectric layer on the substrate, and forming an interconnect structure penetrating the dielectric layer within the dielectric layer, including a first interconnect opening and a second interconnect opening isolated from each other, wherein the opening size of the first interconnect opening is smaller than the opening size of the second interconnect opening; forming a first interconnect structure in the first interconnect opening and forming a second interconnect structure in the second interconnect opening; wherein the resistivity of the second interconnect structure material is lower than the resistivity of the first interconnect structure material, and the gap-filling capability of the first interconnect structure material is greater than the gap-filling capability of the second interconnect structure material. This invention, through the formation of the first and second interconnect structures, improves both the gap-filling performance of the interconnect structure material and ensures the conductivity of the interconnect structure, thereby improving the electrical performance and reliability of the device, such as back-end electrical performance and electromigration (EM) performance.

This application discloses an additive for lithium-ion batteries and its application. The additive has the following raw material composition by weight: 40-70 parts first solvent; 1-10 parts first polymer; 5-15 parts second polymer; 10-20 parts small molecule organic amine; and 10-20 parts stabilizer. The first polymer contains at least one nitrogen-free polar functional group; the second polymer contains at least one nitrogen-containing polar functional group; and the stabilizer is a hydrazine compound. The additive provided in this application, when used in lithium-ion batteries, can solve the problems of thick electrodes easily cracking and the difficulty in dispersing positive electrode particles.

This invention discloses a Ni-Me co-doped modified silver-tungsten electrical contact material and its preparation method. The preparation method of the silver-tungsten electrical contact material includes the following steps: (1) Weigh each component according to the following formula for later use; Ni 1.0-1.8 wt.%, Me 0.1-0.5 wt.%, silver powder 35-45 wt.%, and the balance is tungsten powder; wherein, Me represents the doping element Co, Sr or Ti; the doping element is weighed in the form of its nitrate; (2) Perform a mechanical alloying-assisted molten salt decomposition reaction on the weighed components to obtain Ni-Me co-doped AgW powder; (3) The obtained powder is molded to obtain a Ni-Me co-doped AgW skeleton, and the obtained skeleton and Ag sheet are placed in a protective atmosphere for melting and infiltration to obtain the final product. The Ag / W electrical contact material prepared by this method has a low wetting angle at the interface between the W phase and the Ag phase, exhibiting excellent salt spray corrosion resistance and electrical lifetime.

The invention belongs to the technical field of semiconductor films, and relates to a visible-near infrared wide spectrum semiconductor transparent electrode and a preparation method thereof. The visible-near-infrared wide-spectrum semiconductor transparent electrode comprises a substrate and an indium tin oxide film formed on the substrate, the indium tin oxide film comprises In, O and Sn, and the film structure is a glass state indium tin oxide embedded In2O3 and SnO2 crystal particle network. The prepared indium tin oxide thin film is of a special structure that glassy state indium tin oxide is inlaid with an In2O3 and SnO2 crystal particle network, the scattering absorption of the thin film to near-infrared incident light is greatly reduced through the glassy state structure, and the average transmittance gt of the thin film in the visible to near-infrared band (380 nm to 2500 nm) is made to be gt; the In2O3 and SnO2 crystal particle network structure endows the material with good conductive characteristics, and the low resistivity of the material is lower than (lt: 10 <-3 > omega.cm).

The anti-oxidation laser processing method for the solar cell comprises the steps that a semi-finished solar cell product is moved to a processing station, and a to-be-processed surface faces upwards; at least providing a protective gas flow field on the to-be-processed surface so as to isolate the to-be-processed surface from being in contact with air; and laser penetrates through the protective gas flow field to scan the to-be-machined surface according to a preset pattern, and machining is completed. Through the method, the protective gas flow field is formed on the to-be-processed surface of the solar cell semi-finished product, a protective gas atmosphere is provided for laser processing, and the technical problem of oxidation of a processing layer or a film layer adjacent to the processing layer caused by laser processing in the prior art is solved.

The application provides a non-radio frequency piezoelectric acoustic device and earphone. The non-radio frequency piezoelectric acoustic device comprises a substrate, an insulating layer and a piezoelectric functional layer. The substrate is made of a low-resistance material, so that the loss of the non-radio frequency piezoelectric acoustic device during operation can be effectively reduced. The substrate with low resistivity has a large number of free carriers. When the electric field in the piezoelectric functional layer changes, the free carriers can quickly respond and move to form effective mirror charges, which can play a good electromagnetic shielding effect, reflect the energy back to the piezoelectric functional layer, and prevent the energy from leaking and dissipating to the deeper and farther substrate.

The invention provides a semiconductor structure and a preparation method of the semiconductor structure. The semiconductor structure comprises a substrate, an epitaxial layer, a trench gate structure, a doping structure, a source electrode structure and a drain electrode structure, wherein the epitaxial layer is located at one side of the substrate; the trench gate structure is located in the epitaxial layer; the doping structure is located in the epitaxial layer, at least part of the doping structure is located between the groove gate structure and the substrate, and the doping concentration of the doping structure is firstly increased and then decreased in the direction that the substrate points to the epitaxial layer; the source structure is located at one side of the epitaxial layer away from the substrate; the drain structure is located on one side of the substrate away from the epitaxial layer. The performance of the semiconductor structure can be improved by arranging the doping structure with the variable doping concentration.

The present disclosure relates to an electrically conductive rubber composition, a sealing assembly and a rolling bearing. The electrically conductive rubber composition comprises: a base rubber, an electrically conductive carbon black, carbon nanotubes and graphene, which are uniformly mixed into the base rubber, wherein the mass fraction of the electrically conductive carbon black ranges from 25 to 55 parts; the mass fraction of the carbon nanotubes ranges from 3 to 5 parts, and the mass fraction of the graphene ranges from 2 to 7 parts. When the electrically conductive rubber composition is prepared by using the electrically conductive fillers in the above mass fraction range, and the electrically conductive rubber composition is applied to the sealing assembly of the rolling bearing, the sealing assembly can continuously and timely release static electricity, effectively preventing the electric corrosion of the raceway of the rolling bearing caused by the accumulation and discharge of shaft current or electric charge.

A concentrated flowable composition having a total metal weight of at least about 45% by weight is used to form a conductive material. The compositions include metal microparticles, such as silver flakes, silver particles, and / or silver nanowires, and for particularly interested embodiments, reducible metal compositions, such as one or more silver salts, are also included. The composition includes an organic precursor forming a polymeric matrix and includes a dissolved polymeric binder, a crosslinkable or polymerizable monomer, oligomer or polymer, or a mixture thereof. The flowable precursor compositions can be used to form electrically conductive structures, such as composites of a solid polymer matrix and at least about 45% by weight of a metal. The composite may have a resistivity of no more than about 5 * 10 <-3 > ohm-cm. Methods of forming the flowable precursor compositions and composites are described.

This invention discloses a large-size molybdenum-titanium alloy target and its preparation method. The preparation method includes the following steps: S1, selecting raw materials molybdenum powder and titanium powder; S2, granulating the molybdenum powder under inert gas protection to prepare granulated molybdenum powder, wherein the particle size and tap density of the granulated molybdenum powder are matched with those of the titanium powder; S3, mixing the granulated molybdenum powder and titanium powder in a certain proportion under inert gas protection; S4, degassing the mixed powder; S5, hot isostatic pressing to form an ingot; S6, vacuum heat treatment of the ingot to obtain the large-size molybdenum-titanium alloy target. By adding the granulation and forming process of molybdenum powder, the morphology of the raw materials is controlled, effectively suppressing the tendency of the mixed powder to separate in subsequent processing. This method significantly improves the compositional uniformity and batch stability of the molybdenum-titanium alloy target, avoids product defects and scrap due to separation, thereby reducing production costs and improving product qualification rate.

The present application relates to the technical field of conductive paste, and particularly relates to a silver-coated copper conductive paste and a preparation method thereof. The silver-coated copper conductive paste comprises the following components: silver-coated copper powder, an organic carrier and a functional additive; the organic carrier comprises modified resin, a compounded solution and a plasticizer; the functional additive comprises a composite dispersant, an antioxidant additive and an adhesion promoter; wherein the modified resin comprises one or more of carboxylated epoxy resin or aminated acrylic resin; the compounded solution comprises one or more of ethylene glycol butyl ether acetate or butyl acetate. In the present application, the interface compatibility between the conductive filler and the carrier is effectively improved by optimizing each component in the conductive paste, and the adhesion reliability on the flexible substrate is particularly enhanced. The present application further discloses a preparation method of the silver-coated copper conductive paste, realizes uniform mixing of each component, and finally realizes the synergistic improvement of low silver cost, high conductivity and high adhesion.

The utility model provides a spherical alloy anticorrosion grounding device, comprising a grounding main body, a leading-out assembly and a grounding wire, the grounding main body is a hollow spherical structure, the grounding main body is connected with the grounding wire through the leading-out assembly, a containing cavity of the grounding main body is filled with a conductive solution, and the lower part of the grounding main body is provided with a plurality of through holes. And the conductive solution is diffused to the external environment. The spherical grounding main body has a larger surface area, the contact area with soil is increased, the diffusion area is large, and the through-flow capability is high. In addition, the grounding main body is filled with a conductive solution, and the conductive solution is slowly released to surrounding soil through the through holes, so that the conductive performance of the soil is enhanced, and the grounding resistance is more effectively reduced. Moreover, the design of the leading-out assembly enables the grounding main body to be conveniently connected with a grounding wire, and provides more reliable grounding protection for equipment and personnel. The grounding device is especially suitable for being used in places requiring reliable grounding protection, such as an electric power system, rail transit, an airport, a communication base station and the like.

The invention discloses a black color master batch as well as a preparation method and application thereof. The black color master batch composition comprises the following components in parts by mass: 50-85 parts of a liquid crystal polymer; 15 to 40 parts of carbon black; 0.1 to 1 part of nano silicon dioxide; the average primary particle size ratio of the carbon black to the nano silicon dioxide is (3-8): 1. In the black color master batch composition, the nano silicon dioxide can improve the system viscosity and promote shear force transmission, and when the average primary particle size of the nano silicon dioxide is smaller than that of the carbon black, the nano silicon dioxide can be effectively dispersed and adsorbed on the surface of the carbon black to form a three-dimensional network structure and reduce the cohesion of the carbon black, so that the dispersity of the carbon black is improved; the size of the carbon black aggregate is reduced, and the number of the carbon black aggregate is reduced, so that a conductive path is formed in the matrix resin, and the resistivity is reduced; meanwhile, the high-temperature resistance is also suitable for a resin material system needing high-temperature processing.

The utility model discloses a photovoltaic line ground resistance resistance lightning protection device, including site, photovoltaic system and lightning protection component, the center of site installs photovoltaic system, and the periphery of photovoltaic system is installed with resistance soil zone that buries. Advantageous effect: set up the main ground net that surrounds the outside of photovoltaic system, through the reliable connection of the ground lead -on line of multipoint connection with photovoltaic system, scatter lightning current distribution, adopt the main ground net material of graphene ground belt, through the resistance rate of multiple parallel reduction, its conductivity and corrosion resistance are superior to traditional steel material, can reduce contact resistance, on this basis, since the main ground net is connected with photovoltaic system through the ground lead -on line of mesh arrangement, and the main ground net is laid on the top surface of rectangular resistance soil zone, and the main ground net is set in the pre -buried pit of resistance soil zone through the ground lead -down body, combines the resistance soil zone of low resistance rate soil and resistance agent filling combination, enlarge the current spreading range, promote the current spreading efficiency.

The present application relates to a kind of glass solder for connecting aluminum nitride ceramic and its preparation method and application.The chemical composition of the glass solder for connecting aluminum nitride ceramic includes: 60-65wt.% ZnO, 20-25wt.% B2O3, 10-13wt.% SiO2 and 2-5wt.% Al2O3, and the sum of the mass percentage of each component is 100wt.%.