196 results about "Surface resistivity" patented technology

The invention relates to the technical field of anti-electromagnetic interference, in particular to an anti-electromagnetic interference method for a flywheel energy storage system of a data center, which comprises the following steps: acquiring change rate data of the rotating speed and the angular speed of a flywheel, judging the attribution of a disturbance interval, recording change characteristics, extracting an interference identifier, comparing the interference identifier with impedance change, and generating a switching node. Frequency response and reflection coefficient characteristics of the filtering unit are detected, a coupling channel generation label is identified, and output fluctuation is evaluated to generate an anti-interference capability state label. According to the method, the surface resistivity of the shielding layer is dynamically switched according to the comparison result of the specific interference triggering identification bit and the signal link impedance change state in each disturbance stage through classification judgment and correlation marking of inertial disturbance, so that the effect of suppressing electromagnetic interference in real time is optimized; the influence degree of electromagnetic interference can be dynamically evaluated in the system operation process, and the adaptability of the energy storage system to the electromagnetic interference is judged and adjusted in real time.

To provide an electrophotographic member that can stably exhibit an electrostatic offset prevention effect.SOLUTION: An electrophotographic member has at least a base layer, an elastic layer, and a surface layer containing fluororesin in this order. The surface resistivity of the elastic layer is 1×1014 Ω / sq. or more. The surface resistivity of the surface layer is 1×1015 Ω / sq. or more. The electrophotographic member further has a resin layer between the elastic layer and the surface layer. The resin layer includes an ion conductive agent. The surface resistivity of the resin layer is 1×1014 Ω / sq. or more.SELECTED DRAWING: Figure 3

The invention discloses a halogen-free low-splashing environment-friendly solder wire and a preparation method thereof, and relates to the technical field of electronic welding materials, and the halogen-free low-splashing environment-friendly solder wire is prepared from the following raw materials in percentage by mass: 1-4wt% of halogen-free scaling powder and the balance of lead-free solder; the lead-free solder is composed of the following components of Cu, Bi, Al, Ga, Ir, Ca, In and Sn. The halogen-free scaling powder comprises the following components: (3, 6-diamino acridine-9-yl) boric acid, glycerol triabietate, 3-(N-morpholinyl)-2-hydroxy propanesulfonic acid sodium salt, 3-trihydroxymethyl methylamino-2-hydroxy propanesulfonic acid, hexahydro-1, 3-ethoxy-s-triazine, a functional copolymer, a surface active agent, a corrosion inhibitor, a halogen-free activity reinforcing agent, an antioxidant, a solvent and rosin resin. The solder wire is low in splashing rate, high in surface resistivity and welding spot reliability, free of obvious corrosivity and good in weldability.

The invention relates to the technical field of plate electrodes, in particular to a plate electrode based on a polymer and a conductive micro-nano material and a preparation method of the plate electrode, the plate electrode comprises the polymer and the conductive micro-nano material, the polymer is one or two of a polymer plate and a polymer emulsion, and the particle size of the conductive micro-nano material is one or more of 40 nm to 10 [mu] m. According to the plate electrode based on the polymer and the conductive micro-nano material and the preparation method of the plate electrode, the plate electrode prepared from the conductive micro-nano materials with different particle sizes has relatively low surface resistivity and relatively high oxygen evolution potential, and can meet application requirements of specific places such as water treatment, electrochemical preparation of graphene and the like.

The invention discloses a low-melting-point glass-based inorganic anticorrosive coating with excellent conductivity and a preparation method of the low-melting-point glass-based inorganic anticorrosive coating. The inorganic anticorrosive conductive coating material comprises 80-99.5 parts of a glass base material and 0.5-20 parts of conductive phase powder dispersed in the glass base material, wherein the conductive phase powder adopts a conductive oxide; the preparation process comprises the following steps: 1) mixing glass base materials; 2) melting into molten glass; 3) crushing and introducing a conductive phase; 4) sintering into blocks; 5) crushing and screening the sample; (6) preparing slurry; (7) paint spraying; and 8) sintering and cooling to obtain the paint. The method is simple in process, low in cost, corrosion-resistant, high-temperature-resistant and good in conductivity; after the conductive phase is added, the surface resistivity of the coating is reduced to 102-109 ohms, and the minimum value of the surface resistivity is far higher than that of an existing system.

The invention discloses an antistatic polyester film capable of phase change temperature regulation and a preparation method thereof, the film provided by the invention has a double-layer structure, the bottom layer is a temperature regulation functional layer doped with a phase change material, and the surface layer is a functional layer doped with carbon black to prevent electrostatic aggregation. According to the antistatic polyester film capable of adjusting the temperature through phase change, the adjusting temperature is 27 DEG C, the phase change enthalpy is 17 j / g, the surface resistivity of the surface layer is 1.1 * 10 < 7 > omega / m < 2 >, and the antistatic polyester film is expected to be applied to the fields of intelligent wearable equipment, medical sensors, electronic packaging materials, supercapacitor protection layers and the like.

The present application discloses a polycarbonate composite material and a preparation method therefor, a polycarbonate antistatic sheet, and a polycarbonate antistatic carrier tape. In the polycarbonate composite material, polycarbonate is used as a main component, and is used in conjunction with carbon nanotubes, a compound dispersant, an antioxidant, a lubricant, and a toughening agent, the carbon nanotubes are used as conductive agents to replace conventional conductive materials, ensuring that no die ash will be generated in the process of manufacturing a sheet or a carrier tape, and cleanliness is high, and use of a compound dispersant system containing a mixture of a hydroxyl-terminated organic lubricant and an inorganic dispersant can improve the dispersion effect of the carbon nanotubes in the polycarbonate material, reduce surface resistivity, and ensure that the material has uniform conductivity; in addition, the toughening agent can improve mechanical properties, the antioxidant and the lubricant can ensure stable material properties, processing is easy, and the polycarbonate composite material having a low crystal point, uniform electric conduction and high cleanliness is obtained, thus facilitating wide application.

A protective material layer, a battery, an energy storage apparatus, and an electric device. The protective material layer is suitable for being provided on the surface of the shell of a battery, and the protective material layer is made of an insulating material, the surface resistivity of which is greater than or equal to 1015Ω. In an infrared spectrum of the protective material layer that is measured by means of Fourier transform infrared spectroscopy, the relative intensity ratio I of the strongest peak at a 1072±3 cm-1 wavelength to the strongest peak at a 1724±3 cm-1 wavelength is 1.3-1.9. The protective material layer has good heat conduction capability, insulating flame-retardant capability, thermal stability and adhesion capability, and thus can be reliably coated on the surface of a shell, thereby preventing a safety accident caused by thermal runaway of a battery.

A static dissipative single use glove having a vertical resistivity of less than about 108 Ohm when determined according to EN 1149-2 and surface resistivity of less than or equal to about 106 Ohm when determined according to EN 1149-1, which includes a polymeric layer comprising conductive filler particles. A method to produce the single use glove is also disclosed.

The present invention provides a dual-path antistatic film and a preparation method thereof, and relates to the technical field of antistatic films. A dual-path antistatic film comprises the following raw materials in parts by mass: 80-150 parts of polyolefin, 0.00005-0.0002 parts of conductive polymer material, 3-15 parts of antistatic agent, 0-1 parts of lubricant, and 0-0.0001 parts of conductive microfiber. The dual-path antistatic film provided by the present invention has low surface resistivity and excellent antistatic effect.

The utility model relates to a latticed chip protective film, which is formed by laminating and compounding a conductive film, an antistatic protective film and a conductive adhesive film, the antistatic protective film is a latticed antistatic protective film, one surface of the latticed antistatic protective film is compounded on the conductive film, and the other surface of the latticed antistatic protective film is compounded on the conductive adhesive film. The other surface of the latticed antistatic protective film is bonded with one surface of the conductive bonding film, and the other surface of the conductive bonding film is provided with strip-shaped convex bonding strips which are parallel to each other. The anti-static packaging film has the advantages that firstly, the anti-static protection film is of a latticed structure, so that a conductive layer is formed on the surface of a packaged chip, the surface resistivity of the chip is reduced, static electricity generated when the chip is packaged, transported and torn off is quickly led in and leaked, and the internal structure of the chip is prevented from being damaged by the static electricity; and 2, the strip-shaped convex bonding strips on the surface of the conductive bonding film are bonded in parallel at intervals, so that the bonding surface between the conductive bonding film and the chip is greatly reduced, and when the antistatic protective film bonded on the surface of the chip needs to be torn off from the chip, the antistatic protective film can be naturally and smoothly torn off without generating static electricity, and the service life of the antistatic protective film is prolonged. And the internal structure of the chip is ensured not to be damaged by the generated static electricity during assembly.

The invention relates to a modified high-entropy alloy wave-absorbing material and a preparation method thereof.The preparation method of the modified high-entropy alloy wave-absorbing material comprises the following steps that (1) Fe powder, Co powder, Ni powder and Cu powder are mixed through first ball milling, and FeCoNiCu high-entropy alloy powder is obtained; (2) mixing a ball-milling medium with the FeCoNiCu high-entropy alloy powder obtained in the step (1) in a second ball-milling manner, performing solid-liquid separation to obtain a solid phase, and sequentially performing first drying and sieving to obtain ball-milled high-entropy alloy powder; and (3) mixing the organic modified liquid with the ball-milled high-entropy alloy powder obtained in the step (2), and then performing secondary drying to obtain the modified high-entropy alloy wave-absorbing material. The ball-milled high-entropy alloy powder prepared by adopting a mechanical alloying method has dielectric loss and magnetic loss; the organosilane coating layer improves the surface resistivity and optimizes the impedance matching performance.

The utility model discloses an antistatic fireproof plate which comprises a fireproof core plate which is formed by gum dipping and pressing of a plurality of layers of kraft paper. The bottom paper layer is adhered to the surface of the rear side of the fireproof core plate; the groove is formed in the surface of the front side of the fireproof core plate and surrounds the edge; the groove is filled with the conductive silica gel, and the conductive silica gel has a radian protruding out of the surface of the fireproof core plate; the polyvinyl alcohol fiber cloth is adhered to the surface of the front side of the fireproof core plate. The grooves are formed in the front side surface of the protective core plate, the conductive silica gel is filled, continuous conduction is formed, the surface resistivity is reduced, the anti-static effect is effectively achieved, meanwhile, the outer side of the protective core plate is further covered with a layer of polyvinyl alcohol fiber cloth, the anti-static fireproof plate has the excellent anti-static performance, the anti-static effect of the surface of the fireproof plate can be greatly enhanced, and the application range is widened.

An electric winding assembly includes a conductor core having a first end and an opposing second end, an insulation layer overlying the conductor core, and a conductive shield layer overlying the insulation layer. The conductive shield layer includes an insulative carrier circumferentially surrounding the insulation layer and a conductive layer disposed on the insulative carrier, the insulative carrier formed from a material having a thermal rating greater than 180° C., the conductive shield layer having a surface resistivity between 1.5 and 10 ohms per square.

The present application belongs to the field of advanced coating and preparation, and particularly relates to a high-transparent and scratch-resistant multifunctional antistatic coating and a preparation method thereof. The present application provides a high-transparent and scratch-resistant antistatic coating, raw materials of the antistatic coating comprising fluorion-containing silsesquioxane monomer, functional monomer and catalyst; wherein the functional monomer is a crosslinking agent or an anti-crystallization agent. The coating obtained by the present application has a light transmittance of >98% (550 nm); a surface pencil hardness of greater than 9H, no scratches after more than 1000 times of steel wool rubbing; a surface resistivity of about 10 8 ~10 9 Ω / sq, and a fast electrostatic discharge rate.

The invention belongs to the technical field of functional coatings, and particularly relates to a static conductive coating for nonmetal and a preparation method of the static conductive coating. The coating is composed of modified Si-C fluorosilicone resin, conductive nickel powder, ethandiamide and multiple auxiliaries, the modified Si-C fluorosilicone resin is prepared through a double-grafting reaction of mercaptoethanol and vinyl trifluoroacrylate,-S-and-CF groups are introduced into molecules at the same time, and the polarity of the resin and the dispersity of the conductive nickel powder are remarkably improved. The oxadiamide as a polar small molecule synergist can promote the formation of a conductive network and enhance the interface bonding force. The surface resistivity of the obtained coating is about 2.8 * 10 omega / square, the static decay time is 0.38 s, the adhesive force reaches 5B, and the conductivity retention rate after wear resistance exceeds 97%. The coating has excellent static conductivity, adhesive force and environmental stability, is suitable for the surfaces of non-metal base materials such as ABS, PVC and polycarbonate, and can be widely applied to the fields of electronic equipment shells, rail transit interior trim parts, anti-explosion and anti-static terraces and the like.

The invention relates to the technical field of materials, discloses a preparation method and device of a visible-light-transparent metamaterial wave absorber, and solves the problems that an existing preparation method and device of the visible-light-transparent metamaterial wave absorber are narrow in wave absorbing bandwidth, poor in visible light transparency and difficult to achieve an infrared camouflage effect. The infrared stealth layer, the first PMMA layer, the microwave absorption layer, the second PMMA layer and the microwave reflection layer are combined and arranged by utilizing the visible light transparency characteristic of the indium tin oxide thin film and the polymethyl methacrylate or the polyvinyl chloride plate, the indium tin oxide with resistance loss is used as an absorbent, electromagnetic resonance loss is introduced, and meanwhile the resistance loss is increased; the adjustable resistance and patterning characteristics of the indium tin oxide are fully utilized, the duty ratio of the high-conductivity indium tin oxide thin film in the infrared stealth layer is improved, the infrared emissivity can be reduced, and the transparent indium tin oxide thin film with different surface resistivity is utilized to realize broadband strong absorption of visible light transparency and infrared disguise.

A negative-electrode plate, a preparation method thereof, and a secondary battery, a battery module, a battery pack, and an electric apparatus including such negative-electrode plate are provided. The negative-electrode plate includes an alkali metal layer and a polymer film layer provided on at least one surface of the alkali metal layer. Surface resistivity of the polymer film layer gradually increases in a thickness direction of the polymer film layer away from the alkali metal layer. When the negative-electrode plate is used in a secondary battery, lithium dendrites can be effectively inhibited.

A curable ink stack includes an insulating ink layer, a conductive ink layer disposed on at least a portion of the insulating ink layer, and a cover ink layer disposed on the conductive ink layer. The insulating ink layer includes a first surface resistivity and the conductive ink layer includes a second surface resistivity. The second surface resistivity is less than the first surface resistivity. The cover ink layer includes epoxy-based ink. When the curable ink stack is disposed and cured on the glass substrate to form a cured ink stack, the cured ink stack exhibits a total surface resistivity greater than or equal to 1.00 * 108 Omega.

The invention discloses an anti-static polypropylene composite material and a preparation method thereof. The anti-static polypropylene composite material is prepared from the following components in parts by weight: 100 parts of polypropylene resin, 0.01-0.05 part of amphiphilic graphene oxide and 1 part of a processing aid. The polar elastomer, the silane coupling agent and the graphene oxide are adopted for graft modification, so that the graphene oxide has amphipathy to polypropylene, namely, the silane coupling agent endows the graphene oxide with relatively good lipophilicity, and the polar elastomer endows the graphene oxide with relatively good hydrophilicity. The amphipathy of graphene oxide is utilized, the hydrophilic end enables siloxane-grafted graphene oxide to tend to migrate to the surface of the composite material, the oleophylic end endows graphene oxide with good compatibility with polypropylene, good dispersion of graphene oxide is guaranteed, a conductive path is formed on the surface layer of the composite material, and the surface of the composite material is protected. Therefore, the surface resistivity of the polypropylene composite material is greatly reduced under the condition of extremely micro addition amount.

The utility model discloses a stretching electrostatic eliminating device for transparent nylon film production. The stretching electrostatic eliminating device comprises a processing box, a high-voltage generator and a side plate, empty grooves are formed in the side edges of the machining box correspondingly, a positioning frame is arranged on one side of the bottom in the machining box, and a heating pipe is arranged at the top of the positioning frame. The high-pressure generator is arranged in the processing box; a heat treatment mechanism composed of the hot-air blower, the hot-air cavity and the hot-air nozzle is combined with the ionic wind bar to perform double static electricity removal treatment on the film, heat treatment increases dispersion of conductive particles through hot-air filling gaps to reduce surface resistivity, ionic wind generated by the ionic wind bar neutralizes static electricity, and the static electricity removal effect is improved through the synergistic effect of the heat treatment mechanism and the ionic wind bar. Static electricity on the surface of the thin film can be removed more thoroughly; through the matching design of the threaded rods in threaded connection with the side plates, the concave frames and the limiting rollers, the conveying path of the thin film is accurately controlled, the stability of the thin film in the machining process is guaranteed, and the situation that the static eliminating effect and the thin film quality are affected due to thin film deviation or wrinkles is avoided.

The application provides an insulation material resistivity testing device and method, the device comprises a shielding shell provided with a shielding test cavity, an insulation material sample is arranged in the shielding test cavity, and the device further comprises a radiation module, a high-temperature module, a radiation collimation device, a PC module and a pressure and current monitoring device; the pressure and current monitoring device is connected with the insulation material sample; the PC module is connected with the radiation module, the high-temperature module and the pressure and current monitoring device; the high-temperature module is further connected with the pressure and current monitoring device; the radiation module is used for providing a radiation beam for the inside of the shielding test cavity; the high-temperature module is used for providing a high-temperature environment for the inside of the shielding test cavity; the pressure and current monitoring device is used for applying a voltage to the insulation material sample and monitoring the current flowing through the insulation material sample; and the PC module determines the surface resistivity or volume resistivity of the insulation material sample according to the received voltage and current. The device can complete the resistivity testing of the insulation material under different radiation intensities and different temperature environments.

Provided is an electromagnetic wave shielding film from which static electricity that has accumulated during production or transfer can be easily dissipated. An electromagnetic wave shielding film of the present invention includes a protective layer disposed outermost and a shielding layer stacked inward from the protective layer, wherein the protective layer has a surface resistivity of 1.0×105 to 2.0×1012Ω / □, and the protective layer contains a binder resin and carbon particles having an average particle size of 0.1 to 15 μm.

The invention discloses a preparation method of a liquid crystal polymer and a composition thereof and application of the liquid crystal polymer and the composition in electromagnetic shielding materials, and relates to the technical field of organic polymer materials. The invention aims to solve the problem that the conventional electromagnetic shielding material cannot have high mechanical property, conductivity and processability at the same time. According to the invention, thiophene molecules are introduced into the molecular structure of the liquid crystal polymer, so that the liquid crystal polymer has a certain conductive characteristic, and a pi electron cloud in the thiophene molecules forms a conjugated system in the molecules, so that electrons can be freely transmitted in the molecules, thereby generating a semiconductor characteristic. And then the liquid crystal polymer with the conductive property is compounded with a certain amount of carbon fibers, so that the surface resistivity of the material is further reduced, the conductive performance is improved, and the good electromagnetic shielding effectiveness is further obtained. The invention can obtain the preparation method of the liquid crystal polymer and the composition thereof and the application of the liquid crystal polymer and the composition thereof in an electromagnetic shielding material.

The objective is to provide a wafer processing tape that can be used across a wafer in semiconductor processing, which can suppress the adhesion of cutting debris generated during the dicing process due to static electricity, and can also suppress contamination of chips by antistatic agents during processes requiring heating, and a wafer processing method that can integrate multiple semiconductor processing processes by using this tape. [Solution] The device comprises a base layer, an adhesive layer, and an antistatic layer disposed between the base layer and the adhesive layer, wherein the ratio (R1 / R0) of the surface resistivity R1 of the adhesive layer after heating at 250°C for 5 minutes to the surface resistivity R0 of the adhesive layer before heating is 0.001 to 10 or less, and the surface resistivity R1 is 1.0 × 10 12 The following is a tape for wafer processing.

The present invention relates to providing a release film having static electricity diffusibility. The present invention provides a release film having: a base material layer formed of a polyester resin; and a surface layer formed of a tetrafluoroethylene resin containing a conductive filler; and the surface resistivity Rs is 1×10<supgt;11< / supgt; Ω or less. Preferably, the conductive filler contains carbon black, and the tetrafluoroethylene resin further contains particles having an average particle diameter of 1 μm to 15 μm as measured by a laser diffraction particle size analysis method.

To provide an electromagnetic wave absorber that can improve electromagnetic wave absorption performance. [Solution] The electromagnetic wave absorber according to the present invention includes a plurality of sheets comprising glass fibers and a conductive carbon material, the plurality of sheets being laminated, the first sheet of the plurality of sheets being provided on the incident surface side to which electromagnetic waves are incident, and the surface resistivity of the first sheet is higher than that of the second sheet.

The invention discloses a thin crystal ingot resistivity detection method based on an eddy current method probe, which relates to the technical field of semiconductor measurement, solves the problem that the measurement of the corresponding resistivity of a thin crystal ingot to be detected has deviation under partial circumstances, and comprises the following steps: performing electrical detection on the thin crystal ingot to be detected, and analyzing to obtain the calculated surface resistivity of the thin crystal ingot to be detected; based on the calculated surface resistivity of the to-be-measured thin crystal ingot, the thin crystal ingot type of the to-be-measured thin crystal ingot is identified, and the skin depth of the to-be-measured thin crystal ingot is calculated in combination with the skin effect; setting a plurality of groups of contrast thin crystal ingots similar to the thin crystal ingot to be tested, testing the plurality of groups of contrast thin crystal ingots by an eddy current method, and calculating compensation coefficients of the contrast thin crystal ingots based on test results; and calculating a fitting equation based on the compensation coefficient, writing the fitting equation into an upper computer, and calculating the actual resistivity of the to-be-measured thin crystal ingot in combination with the fitting equation, so that accurate measurement of the corresponding resistivity of the to-be-measured thin crystal ingot is realized, and automatic and intelligent measurement of the corresponding resistivity of the to-be-measured thin crystal ingot is also realized.

The invention discloses an amino acid composite material-based anti-terrestrial magnetic suspension garment and a preparation method thereof, the amino acid composite material-based anti-terrestrial magnetic suspension garment comprises a conductive substrate, a pulse wave electric energy adsorption layer, a palm reflection electric cake, a bioluminescence battery assembly and a crystal grain tube, the conductive substrate polystyrene is woven by amine fibers, and the surface resistivity of the conductive substrate is less than or equal to 102 omega.cm; the adsorption efficiency of the pulse wave electric energy adsorption layer is larger than or equal to 90%, the palm reflection electric cake is composed of a silicon carbide ceramic substrate and a silver nanowire electrode, the energy storage density of the palm reflection electric cake is larger than or equal to 50 mAh / g, and the grain tube is detachably connected with the conductive base body through correspondingly-arranged magnetic buckles. Polar amino acids are extracted from herbaceous plants, hexagonal crystal system crystalline compounds are generated in combination with metal salts, a conductive substrate is constructed, a biological fluorescent battery is integrated, fluorescence energy transfer is excited by ultraviolet light, charged particles are driven to vibrate to repel a geomagnetic field, and controllable suspension is achieved. The intelligent energy-saving helmet has the functions of energy self-supply and intelligent adjustment, and is comfortable to wear and high in environmental adaptability.