25results about How to "Improve electrical stability" patented technology

The invention relates to conductive silver paste and a preparation method thereof, and relates to the technical field of low-temperature curing type conductive paste, the conductive silver paste comprises the following components: multi-dimensional micro-nano conductive silver powder, surface conductive type liquid metal nanoparticles, a multi-system organic resin binding phase, a closed curing agent, a mixed organic solvent and various additives; wherein the mass part of each component is as follows: the mass part of the multi-dimensional micro-nano conductive silver powder is 60-90; the mass part of the surface conductive liquid metal nanoparticles is 5-10; the mass part of the multi-system organic resin binding phase is 0.1-10; the mass part of the closed curing agent is 0.1-5 parts; the mass part of the mixed organic solvent is 5-20; the mass part of each additive is 0.1-10 parts. The bending resistance, the adhesive force and the fatigue resistance of the conductive silver paste are improved.

The invention relates to a pressure sensor, a pressure sensing array and a preparation method thereof. The pressure sensor comprises a first substrate, the upper surface of which is provided with a first sensing electrode; the first pressure-sensitive layer is located on the surface of the first sensing electrode, and the first pressure-sensitive layer is a piezoresistive film with a microphase separation structure and a rough upper surface; the lower surface of the second substrate is provided with a second sensing electrode, and the second sensing electrode and the first sensing electrode are oppositely arranged; the second pressure-sensitive layer is located on the lower surface of the second sensing electrode, the second pressure-sensitive layer is a piezoresistive film with micro-phase separation and a rough lower surface, and the lower surface of the second pressure-sensitive layer is opposite to the upper surface of the first pressure-sensitive layer. The pressure sensor provided by the invention has higher sensitivity under high pressure and thin thickness.

The invention discloses a multi-point grounding current limiting device, and relates to the technical field of power transmission line construction, the multi-point grounding current limiting device comprises a placement frame and further comprises a protection assembly, a grounding rod is fixedly installed at the bottom of the placement frame, a placement plate is fixedly installed on the inner wall of the placement frame, and a placement rod is fixedly installed at the top of the placement plate; lifting equipment is arranged on the circumferential surface of the placement rod, a signal receiver is fixedly mounted at the top of the lifting equipment, a current limiting assembly is arranged at the top of the placement plate, a fusing assembly is arranged at the top of the placement plate, a grounding connecting wire is arranged between the fusing assembly and the current limiting assembly, and a limiting frame is fixedly mounted at the top of the placement plate. According to the grounding current limiting device, the L-shaped plate moves downwards to drive the limiting plate to move downwards, the limiting plate moves downwards to make contact with the grounding connecting wire and extrude and fix the grounding connecting wire, the optimal state of the grounding connecting wire can be kept by avoiding bending or pulling, low grounding resistance is ensured, and therefore the efficiency and safety of the grounding current limiting device are improved.

The invention discloses a back contact battery and a preparation method thereof, and belongs to the technical field of photovoltaics. The back contact cell comprises a silicon substrate, a first doping layer and a second doping layer are arranged on the backlight surface of the silicon substrate at intervals, and the conduction types of the first doping layer and the second doping layer are opposite; the silicon substrate comprises a first region, a second region and a channel region, the first region corresponds to the first doping layer, and the second region corresponds to the second doping layer; the channel region is located between the first region and the second region; a concave structure is arranged at the edge junction, close to the first region, of the channel region, and / or a concave structure is arranged at the edge junction, close to the second region, of the channel region, the concave structure extends into the silicon substrate from the surface of the channel region to form a groove, the depth of the groove is d, and d is larger than or equal to 0.1 micron. And obtaining a concave structure at at least one boundary of the channel region by regulating and controlling the laser.

The invention relates to a pressure sensor, a pressure sensing array and a preparation method thereof. The pressure sensor includes: a first substrate; the first sensing electrode is positioned on the upper surface of the first substrate; the first insulating layer is located on the surface of the first sensing electrode and comprises a plurality of first microspheres arranged in an array or is a first hollow film layer; the first pressure-sensitive layer is positioned on the surface of the first insulating layer and is filled in a first gap in the first insulating layer; a second substrate over the first substrate; the second sensing electrode is positioned on the lower surface of the second substrate; the second insulating layer is located on the surface of the second sensing electrode, and the second insulating layer comprises a plurality of second microspheres arranged in an array or a second hollow film layer; and the second pressure-sensitive layer is located on the surface of the second insulating layer, and the second gap in the second insulating layer is filled with the second pressure-sensitive layer. The pressure sensor provided by the invention has higher sensitivity under high pressure and thin thickness.

The invention belongs to the technical field of flexible circuits, and particularly relates to a high-fineness stretchable flexible fabric circuit and a preparation method thereof. The method comprises the steps that liquid metal micro-droplets are prepared through ultrasonic waves, and monomers are connected and modified to the surfaces of the liquid metal micro-droplets through groups such as hydroxyl and sulfydryl; uniformly dispersing the monomer-modified liquid metal micro-droplets, a monomer, a photoinitiator, a cross-linking agent, a diluent and the like in ethanol; treating the photoetched fabric by using oxygen plasma; soaking the fabric subjected to oxygen plasma treatment in liquid metal photoetching slurry, placing the fabric on a photoetching platform, performing double-sided ultraviolet exposure based on a required circuit pattern, and using ethanol and deionized water as developing liquid to obtain a fabric circuit pattern. And sintering the fabric circuit pattern to obtain a conductive path. The stretchable flexible fabric circuit with complex patterns and high precision can be simply and conveniently prepared on various fabrics, and the conductive stability is excellent.

The utility model relates to the technical field of cables, discloses a stretchable halogen-free low-smoke cable, and solves the problem of poor stretchability of a halogen-free low-smoke cable. The safety of the cable is improved by arranging the insulating layer on the outer surface of the conductor, the physical durability of the cable is enhanced due to the high-elasticity layer on the outer surface of the insulating layer, and the electrical stability of the cable in a humid or underwater environment is ensured due to the waterproof layer on the outer surface of the high-elasticity layer. The waterproof layer is arranged on the outer surface of the cable, the flame-retardant layer on the outer surface of the waterproof layer further strengthens the flame-retardant characteristic of the cable, the shielding layer on the outer surface of the flame-retardant layer can effectively inhibit electromagnetic interference, and finally, the outer sheath on the outer surface of the shielding layer provides additional protection, so that the cable has the advantages of no halogen, low smoke and flame retardance. And the cable also has certain stretchability, so that the cable is prevented from being damaged in use, and the use safety of the cable is improved.

The application discloses a kind of discrete series low distributed capacitance liquid cooling heat dissipation device and method, it belongs to electronic device heat dissipation technical field, heat dissipation device includes several heat dissipation units, the top of each heat dissipation unit is used to set power device, and two adjacent heat dissipation units are connected by cooling liquid pipeline;Each heat dissipation unit includes matrix and radiator, cooling liquid pipeline is through the inside of matrix, the top center of matrix is equipped with mounting hole, and mounting hole is equipped with radiator, and the lower half of radiator is inserted into the inside flow channel of cooling liquid pipeline, and the top of radiator is used to place power device.The application adopts discrete series heat dissipation unit structure, cooling liquid pipeline is through each unit matrix, and the lower half of radiator is inserted into the inside flow channel of pipeline, and each unit independently corresponds a power device.Solve the parasitic distributed capacitance problem caused by shared metal radiator, eliminate resonance loop, inhibit switching oscillation, reduce loss, ensure that heat dissipation is uniform and dynamic equalization, improve the stability and service life of high-voltage series module.

This invention discloses a polypyrrole-coated polyurethane electrospun conductive fiber membrane and its preparation method, belonging to the technical field of conductive composite fiber material preparation. The polyurethane fiber membrane is prepared by electrospinning. The PU fiber membrane is immersed in an ethanol solution of 3-aminopropyltriethoxysilane to introduce active amino groups onto the fiber surface. The fiber membrane is then immersed in a mixed aqueous solution containing FeCl3 and p-toluenesulfonic acid, and a pyrrole aqueous solution is slowly added dropwise under ice bath conditions to allow polypyrrole to grow in situ on the PU fiber membrane, obtaining the PPy@PU conductive fiber membrane. This invention enhances the FeCl3 content by surface coupling APTES onto the PU fiber surface. 3+ The interface pre-adsorption effect is achieved by in-situ oxidation polymerization of FeCl3 / p-TSA system under ice bath conditions, which enables PPy to grow uniformly and stably on the fiber surface, effectively improving the interfacial bonding force between PPy coating and PU fiber, and exhibiting good electrical conductivity stability and comfortable breathability.

The invention belongs to the technical field of molecular electronics, and particularly relates to a mixed functional molecular film with high stability and a preparation method and application thereof. The mixed functional molecular film comprises a gold substrate, and a self-assembled molecular film and a reinforcing body which are positioned on the surface of the gold substrate, the self-assembled molecular film sequentially comprises an anchoring layer, a functional layer and a bridging layer from bottom to top. Compared with Rh2-ABP, the mixed functional molecular film prepared by the invention has the advantages that the non-breakdown probability can be increased from 10% to 89%, the maximum breakdown voltage can be increased from 2.4 V to 3.5 V, and the electrical stability of the molecular film is remarkably improved.

The invention discloses a two-component heat-conducting insulating EMI shielding material and a preparation method thereof, and relates to the technical field of EMI electromagnetic shielding materials. The two-component heat-conducting insulating EMI shielding material can effectively conduct heat generated by electronic equipment out, so that the equipment is prevented from being overheated, the safety of the equipment is improved, and the service life of the equipment is prolonged; meanwhile, the insulating property is excellent, internal elements and circuits can be effectively isolated, the electrical stability is improved, and normal operation of equipment is ensured; high shielding effectiveness can be achieved within the range of 20M-20GHz, the influence of electromagnetic radiation on equipment and the surrounding environment is effectively reduced, and the equipment is protected from external electromagnetic interference; the composite material can be applied to multiple fields such as consumer electronics, communication equipment, medical equipment, aerospace, military affairs, unmanned driving and electric automobiles, and meets the requirements of different industries for heat conduction, insulation and EMI shielding; the potting adhesive is low in viscosity and good in fluidity, can be easily processed into various shapes and sizes, and is suitable for potting and shielding requirements of different equipment.

The invention discloses an N-type hanging polycrystal material resistivity grading method, which comprises the following operation steps: in a straight pulling single crystal process, especially when an N-type circulating material is processed, the resistivity of the material is known and controlled, the resistivity is the measure of the hindering degree of the material to current flow and is influenced by the doping concentration and the temperature, and the resistivity of the material is determined according to the influence of the doping concentration and the temperature. And estimating the resistivity when the corresponding residual material amount grows through the initial head resistivity, the doping concentration and the segregation coefficient in the growth process. According to the resistivity grading method for the N-type hanging polycrystal material, the resistance value range of the N-type hanging polycrystal material is calibrated and divided according to the crucible remaining quantity of an output furnace platform through segregation theory measurement and calculation, the impurity concentration corresponding to the residual quantity of the output furnace platform of the hanging polycrystal material is calculated, and the resistivity corresponding to the current concentration is converted to obtain the tail resistance of the hanging polycrystal material; and the resistor in the range of the suspended polycrystal material is reversely pushed, so that the suspended polycrystal material can be accurately graded, and the resistivity concentration ratio is improved.

The invention relates to printable self-adhesive elastic conductive ink as well as a preparation method and application thereof. The printable self-adhesive elastic conductive ink comprises the following components: a thermoplastic elastomer, an interface enhancer and a conductive filler. The elastic conductive ink with self-adhesion is realized, has high permeability and low diffusivity during printing, can adapt to various smooth or rough substrates, and is particularly easy to realize permeable attachment of the ink on the rough or porous substrate, so that the electromechanical stability of an electrode is improved. Typically, the ink can maintain a low resistance change rate under high tensile deformation, can be printed / printed on a fabric to realize a stretchable conductive fabric, realizes good wear resistance and washing resistance, and can be applied to the fields of human health monitoring, electronic skin, soft robots and the like. The preparation method is simple in process, short in flow, excellent in product performance and convenient for batch and large-scale production, and has good application potential.

The application relates to the technical field of solid insulation ring network cabinets, in particular to a solid insulation ring network cabinet, which comprises a cabinet body, the inner part of the cabinet body is respectively provided with a phase unit module, an operating mechanism module and an insulation support module, the phase unit module, the operating mechanism module and the insulation support module are mutually independent modules, and the phase unit module, the operating mechanism module and the insulation support module are respectively independently formed through split type automatic pressure gel pouring; the phase unit module, the operating mechanism module and the insulation support module are respectively independently formed through split type automatic pressure gel pouring, so that the solid insulation ring network cabinet is compact in structure after being assembled and formed, space is saved, the cabinet body width can be reduced from the traditional 500 mm to about 350 mm, space is saved and the transformation cost is reduced, meanwhile, the situation that a whole pouring cabinet is scrapped due to local problems is avoided, and the operation and maintenance cost and the whole life cycle cost are greatly reduced.

The invention belongs to the technical field of glass encapsulating slurry, and relates to glass encapsulating slurry as well as a preparation method and application thereof. The glass encapsulating slurry comprises a first batch, a second batch, a dispersing agent and a solvent, the first batch is composed of first glass powder and a first auxiliary agent; the first glass powder is prepared from SiO2, H3BO3, Al2O3, TiO2, PbO, ZnO and MgO; the first auxiliary agent is obtained by reacting a mixture of vinyltriethoxysilane, beta-cellulose and beryllium oxide with a modified hydrogen-containing silicone oil cross-linking agent; the second batch is composed of second glass powder and a second auxiliary agent; the second glass powder is prepared from SiO2, H3BO3, Al2O3, BaO and Sb2O3; the second auxiliary agent is obtained by reacting a mixture of polydimethylsiloxane, terpilenol and polypropylene glycol with a mixture of polyanionic cellulose, zirconium oxide and polyvinyl alcohol. The method can be well used for packaging and protecting various high-performance electronic devices.

The invention discloses a display panel and a display device, the display panel comprises a first transistor and a second transistor, a second active layer comprises an oxide semiconductor, and the carrier mobility of the second active layer is greater than that of the first active layer. The second active layer comprises a first oxide semiconductor layer and a second oxide semiconductor layer which are stacked. The first oxide semiconductor layer comprises indium, gallium and zinc, the second oxide semiconductor layer comprises indium, gallium, tin and zinc, the first indium ratio is smaller than the second indium ratio, and the first gallium ratio is larger than the second gallium ratio. The first indium ratio is set to be smaller than the second indium ratio and the first gallium ratio is set to be larger than the second gallium ratio in the second active layer, so that the requirement for high mobility of the second transistor is met, the electrical stability of the first oxide semiconductor layer is higher, surrounding hydrogen can be prevented from invading the second oxide semiconductor layer, and the mobility of the second transistor is improved. Therefore, the risk of negative bias of the threshold voltage of the second transistor is reduced.

A polishing method for improving the surface performance of a perovskite single crystal is provided, comprising polishing the upper and lower surfaces of the crystal using a novel polishing liquid while chemically passivating the surface. The present invention uses a chemical polishing liquid to mechanically polish the surface of the perovskite single crystal while passivating the surface, thereby achieving the effects of reducing surface roughness, reducing surface defects, and improving crystal transmittance and electrical stability. The surface roughness and defects of the polished crystal are significantly reduced, and the transmittance and electrical stability are significantly improved. Therefore, the improved method proposed by the present invention is a feasible means of improving the surface performance of the crystal.

The present invention relates to a polyurethane, a method for producing the polyurethane, a conductive paste composition, a conductive wiring, and a method for producing the conductive wiring. The present invention is a polyurethane characterized by containing a phenolic hydroxyl group represented by the following general formula (1A). The present invention provides a conductive paste composition for forming a stretchable conductive wiring having less change in conductivity upon stretching, and a polyurethane of the composition.[Chem. 1]

The utility model belongs to the technical field of cables, and particularly relates to a dry-type outdoor terminal, which comprises an outer insulator, a conducting rod sleeved in the outer insulator, a cable penetrating through the conducting rod, a stress cone used for fixing the cable and a tail pipe arranged at the bottom of the outer insulator, the end part of the external insulation is also provided with a waterproof top plate, and the top plate is provided with a wiring terminal which is conducted with the end part of the cable. Liquid insulation media do not need to be filled, external insulation completely serves as electrical insulation, liquid insulation is prone to chemical reaction under high voltage to be decomposed into other impurities, and therefore electrical stability is better.

This application relates to the field of welding technology in electronic manufacturing, specifically to a vacuum diffusion welding method for aluminum heat spreaders. The method includes a pretreatment stage, a welding process implementation stage, and a post-treatment stage. The pretreatment stage includes sequentially sandblasting, ultrasonic cleaning, and plasma activation treatment of the aluminum surface, followed by preheating under vacuum or inert gas protection. The welding process implementation stage includes assembly and positioning using high-precision fixtures, followed by diffusion welding in a vacuum environment using a stepped pressure method. The post-treatment stage includes cryogenic treatment. This invention significantly improves the interfacial atomic diffusion efficiency and metallurgical bonding strength through a combination of sandblasting roughening and plasma activation surface pretreatment combined with stepped pressure vacuum diffusion welding. For aluminum-copper dissimilar metal connections, a transition layer and a barrier layer are introduced to suppress brittle intermetallic compounds. For flexible electronics manufacturing, gradient heating and local temperature difference control are used to achieve reliable low-temperature connections.

This application discloses a composite high-flowability, high-conductivity conductive masterbatch and its preparation method, relating to the technical field of conductive materials. The masterbatch uses a fiber-forming polymer as a matrix, compounded with conductive carbon black, graphene, silver nanosheets, carbon nanotubes, and modified MXene nanosheets, along with coupling agents, dispersants, antioxidants, and lubricants. The modified MXene nanosheets are modified with an amino-functionalized modifier and a polysaccharide mixture of sodium alginate and agar. Amino grafting improves interfacial compatibility, while polysaccharide coating inhibits filler agglomeration and oxidation, optimizing the dispersion of the conductive filler in the matrix. This masterbatch constructs a multi-level continuous conductive network, significantly improving melt flowability, conductive stability, and mechanical properties, effectively solving the problems of easy agglomeration, poor flowability, and insufficient spinnability of traditional conductive masterbatches.

The application belongs to the technical field of aerogel preparation, and particularly relates to high-strength polypyrrole reinforced nylon aerogel and a preparation method and application thereof. The preparation method comprises the following steps: (1) first, dispersing a hydroxypropyl-beta-cyclodextrin and polyethylene glycol aqueous solution onto an ice surface, adding pyrrole monomers, and forming a dispersion liquid after standing; (2) adding an acid solution containing an oxidizing agent to the dispersion liquid, and obtaining high-strength self-supporting polypyrrole nanometer arrays after reaction; (3) adding the high-strength self-supporting polypyrrole nanometer arrays and nylon into an acidic solvent; and (4) freeze-drying, thereby obtaining high-performance nylon aerogel for 3D printing. The nylon aerogel serves as an intermediate carrier, and improves the polypyrrole-polyurethane interfacial interaction. Moreover, the nylon itself has excellent strength and flexibility, can better adapt to the rheological behavior of the polyurethane matrix, and thus greatly improves the mechanical properties and antistatic capacity of the product.

The invention discloses a parking air conditioner battery positive electrode lead plaster with long low-voltage charging cycle life and a preparation method, the positive electrode lead plaster comprises the following components in parts by weight: 70-92 parts of lead powder, 0.06-0.15 part of antimony trioxide, 0.08-0.2 part of stannous mono-sulphate, 0.06-0.12 part of ultra-strong short fiber, 0.1-0.20 part of graphite, 0.02-0.12 part of single-wall carbon nano-tube, 6-10 parts of pure water and 5.8-9.8 parts of dilute sulphuric acid, the lead powder contains 72-76 wt% of PbO, the size of the ultra-strong short fiber is 2-5mm, the size of the pure water is 2-5mm, and the size of the pure water is 2-5mm. The density of the dilute sulfuric acid is 1.25-1.5 g / cm < 3 The preparation method comprises the steps of composite additive preparation, lead powder premixing, acid mixing and paste mixing, the acid spraying time is controlled to be 18-22 min, the maximum paste mixing temperature is 70-80 DEG C, and the paste discharging temperature is lower than 50 DEG C. A high-efficiency conductive network is constructed through synergistic modification of core components, sulfation and electrolyte layering are inhibited, the cycle life of the battery under the parking working condition exceeds 300 times and is prolonged by 50% or above compared with that of a traditional product, the formula process is adaptive to an existing production line, the yield is high, and the battery is suitable for parking air conditioners and other low-voltage charging scenes and has important practical value and popularization significance.

The battery according to the present invention comprises: an electrode assembly provided by winding a first electrode and a second electrode around a central axis of a winding central hole in a state in which a separator is interposed therebetween; the battery cell shell accommodates the electrode assembly and is provided with an opening in one side; and a collector plate electrically connected to each of the electrode assembly and the battery cell case and having a peripheral portion at an edge thereof, the peripheral portion having a rigidity enhancing portion configured to enhance the rigidity of the peripheral portion.