35 results about "Surface conductivity" patented technology

The invention provides a method for preparing a high-performance lithium manganese iron phosphate positive electrode material based on a manganese iron phosphate precursor, and relates to the technical field of batteries. A method for preparing a high-performance lithium manganese iron phosphate positive electrode material based on a manganese iron phosphate precursor comprises the following steps: S1, mixing a phosphorus source, an iron source and a manganese source in a water medium, adding a surfactant, and carrying out ball milling, drying and sintering to obtain the manganese iron phosphate precursor; and S2, mixing the manganese iron phosphate precursor, a lithium source, a carbon source, a doping agent, an auxiliary agent and deionized water, and carrying out ball milling, drying and sintering to obtain the lithium manganese iron phosphate positive electrode material. The method can improve the surface / interface stability while improving the surface conductivity of the material, thereby prolonging the cycle life of the battery and improving the charge-discharge capacity of the battery.

The invention discloses a high-gain diamond logic phase inverter and a preparation method thereof, and aims to solve the problem that the voltage gain of an existing logic phase inverter is relatively small. According to the high-gain diamond logic inverter, a diamond substrate is subjected to hydrotreating through hydrogen plasma to form the diamond substrate with a hydrogen terminal, a conducting channel is formed after the surface of the hydrogen terminal is in contact with air, and a first source electrode, a first drain electrode, a second source electrode and a second drain electrode are arranged on the diamond substrate. A first ferroelectric medium layer and a second ferroelectric medium layer are deposited on a diamond substrate, a first grid electrode is arranged on the first ferroelectric medium layer, and a second grid electrode is arranged on the second ferroelectric medium layer. According to the invention, an electron beam evaporation process is adopted to form an orthorhombic phase on a ferroelectric material deposited at a low temperature, the ferroelectric material has convertible ferroelectric characteristics, and ultra-steep sub-threshold swing is realized; the surface conductivity can be regulated and controlled by treating the surface of the hydrogen terminal diamond through the oxygen plasma, current matching is achieved, and the logic inverter works in a deep subthreshold region.

The invention discloses a niobium-doped and carbon nanotube continuously coated lithium iron nickel phosphate material and a preparation method thereof, and belongs to the technical field of lithium ion battery positive electrode materials. The niobium source and the phosphorus source are added step by step, the concentration gradient distribution of the niobium element in the material is realized, and niobium is preferentially doped in the [100] crystal orientation through three-section temperature control sintering, so that the bulk phase conductivity and the lithium ion mobility are remarkably improved, and the capacity loss caused by excessive doping is avoided while the lattice structure is stabilized. In addition, the carbon nanotubes and the nitrogen-containing carbon source have a synergistic effect, Li-N-C covalent bonds are formed on the surface of the material, the interface stability is enhanced, the interface side reaction is effectively inhibited, and the surface conductivity is improved. According to the method, through double modification of doping and coating, the problems of low conductivity and poor cycling stability of the lithium iron nickel phosphate material are successfully solved, and the final product shows excellent rate capability and long cycle life.

The invention relates to the technical field of conductive glass, in particular to high-transmittance ITO conductive glass and a preparation method thereof.The high-transmittance ITO conductive glass is prepared by firstly cleaning a glass substrate, then sputtering a first SiO2 film on the surface of the glass substrate through the magnetron sputtering technology and then sputtering an ITO film on the surface of the first SiO2 film; and sequentially sputtering a second SiO2 thin film, a first Ag thin film, a third SiO2 thin film, a second Ag thin film, a fourth SiO2 thin film, a third Ag thin film and a fifth SiO2 thin film on the surface of the ITO thin film to finally obtain the high-transmittance ITO conductive glass. The method is simple and convenient in process and high in controllability, the used materials are cheap and easy to obtain, and the method has a good industrial application prospect. In the constructed structure, SiO2 and ITO cooperate to form a three-layer antireflection film system, and the visible light transmittance of the composite film layer can be remarkably improved. Meanwhile, by introducing multiple layers of ultrathin silver (Ag) films into the top layer SiO2, a composite nano conductive path is formed, and effective cross-layer transmission of carriers can be realized, so that the surface layer SiO2 is endowed with good surface conductivity.

The invention discloses a modified epoxy insulator for reducing surface charge accumulation and a preparation method thereof, and the method comprises the following steps: (1) dissolving dried nano Al2O3 particles in a curing agent, and dispersing to obtain a nano particle curing agent solution; (2) mixing the nano particle curing agent solution, epoxy resin and an accelerant in a vacuum environment, and curing to obtain a nano modified insulator sample; and (3) carrying out ultrasonic treatment on the nano-modified insulator sample by adopting absolute ethyl alcohol, drying, and then carrying out ozone treatment to obtain the modified epoxy insulator capable of reducing surface charge accumulation. According to the invention, material body transport capability can be reduced, charge accumulation through body transport is inhibited, insulator surface conductance is enhanced, and surface charge dissipation is accelerated.

This enables improved (enhanced) charge trapping capability and suppression of parasitic surface conductivity within the wafer structure. [Solution] The wafer structure 240 includes a trap-rich layer 214 bonded to a handle wafer 224 such that the grain structure within the trap-rich layer 214 becomes coarser adjacent to the handle wafer 224, and the grain size within the grain structure decreases away from the handle wafer 224, thereby improving the trapping efficiency of the wafer structure 240 within the trap-rich layer 214 at the interface (IF) toward the top wafer. A method for manufacturing the wafer structure 240 includes the steps of depositing a trap-rich layer 214 on a top wafer 204 and bonding a handle wafer 224 onto the top wafer 204 such that the trap-rich layer 214 is located between the top wafer 204 and the handle wafer 224.

This enables improved (enhanced) charge trapping capability and suppression of parasitic surface conductivity within the wafer structure. [Solution] The wafer structure 232 includes a trap-rich layer 214 bonded to a handle wafer 224 such that the grain structure within the trap-rich layer 214 becomes coarser adjacent to the handle wafer 224, and the grain size within the grain structure decreases away from the handle wafer 224, thereby improving the trapping efficiency of the wafer structure 232 within the trap-rich layer 214 at the interface (IF) toward the top wafer. A method for manufacturing the wafer structure 232 includes the steps of depositing a trap-rich layer 214 on a top wafer 204 and bonding a handle wafer 224 onto the top wafer 204 such that the trap-rich layer 214 is located between the top wafer 204 and the handle wafer 224.

This application discloses a novel polyimide composite film material with high surface electrical strength, comprising a polyimide base layer and an electrospun polyimide composite nanofiber surface layer, wherein the electrospun polyimide composite nanofiber surface layer contains a metal compound; the thickness of the polyimide composite film material is 25–250 μm. The polyimide composite film material provided in this application is composed of a polyimide resin base layer and an electrospun polyimide composite nanofiber surface layer, which are ultimately subjected to high-temperature imidization. After a chemical reaction, the layers are bonded together to form a single unit, exhibiting strong interlayer adhesion. This novel polyimide composite film material, while maintaining excellent mechanical properties, possesses a lower secondary electron emission coefficient, higher surface conductivity, and faster surface charge dissipation capability, thereby improving the surface electrical strength of the polyimide film material through multiple pathways, meeting the needs of spacecraft manufacturing for insulating materials.

The present application relates to the field of insulating material surface modification, and particularly to a polishing method for improving the surface flashover performance of a three-column insulator, which comprises longitudinally dividing into equidistant annular regions; cleaning the surface of the three-column insulator, measuring the potential, surface conductivity and roughness of each region of the three-column insulator; and polishing in gradient from the high-voltage end to the grounding end. The polishing method for improving the surface flashover performance of a three-column insulator can improve the modification efficiency and modification results of large three-column insulators.

This invention belongs to the field of thermosensitive materials technology, specifically relating to a nanosheet composite material and its preparation method, a conductive nanocomposite paper with shape memory function, and its application. This invention provides a nanosheet composite material comprising M(OH)(OCH3) nanosheets and polydopamine and a conductive metal loaded on the M(OH)(OCH3) nanosheets; wherein M includes Co and Ni. The conductive nanocomposite paper prepared from the nanosheet composite material provided by this invention, based on the excellent surface conductivity and thermally triggered shape memory characteristics of nanopaper, can be used as a fire alarm paper without direct contact with flames. It can connect to the alarm circuit when abnormal heat accumulation occurs, thereby achieving sensitive early fire alarm.

This invention provides a device and method for testing the surface conductivity of conductive wires in the millimeter-wave to terahertz frequency band, belonging to the field of surface conductivity testing technology. The testing device is designed based on a double-concave quasi-optical cavity and innovatively utilizes the differentiated multi-mode of the quasi-optical cavity to accurately extract key geometric and electrical parameters of the conductive wire: the electric field of the symmetric mode is concentrated on the cavity axis, and the radius of the conductive wire at this position directly affects the coupling volume with the electric field. Therefore, the frequency shift of the symmetric mode is used to calculate the precise radius of the conductive wire based on the principle of shape perturbation; the antisymmetric mode has a zero electric field at the axis and is more sensitive to surface loss. The quality factor variation value is determined using the antisymmetric mode. Finally, based on the cavity wall impedance perturbation theory, combined with the radius and quality factor, the surface conductivity of the conductive wire is measured, achieving accurate measurement of the surface conductivity of a single fine conductive wire in the millimeter-wave to terahertz frequency band.

The invention discloses a second harmonic enhancement method, a semiconductor-graphene nonlinear composite structure is adopted, the semiconductor-graphene nonlinear composite structure comprises at least two anisotropic nano-particles wrapped by graphene, a gap is arranged between every two nano-particles, and the gaps are arranged between every two adjacent nano-particles. The surface conductivity of graphene is composed of in-band conductivity and inter-band conductivity, and the second harmonic scattering efficiency is enhanced by three orders of magnitude through the near-field coupling characteristic between two graphene wrapped nanoparticles. According to the invention, the coupling characteristic between two graphene-coated nano-particles is utilized, so that the enhancement of second harmonic scattering up to 3 orders of magnitude is realized.

The present application relates to the technical field of laundry treatment. Provided is a laundry treatment apparatus. The laundry treatment apparatus comprises a laundry accommodating drum, a lifting rib, and an electrical conductivity measurement device, wherein the laundry accommodating drum has a laundry accommodating cavity; the lifting rib is arranged in the laundry containing cavity; and at least part of the electrical conductivity measurement device is arranged on the outer surface of the lifting rib. At least part of the electrical conductivity measurement device is arranged on the outer surface of the lifting rib, and the electrical conductivity measurement device can be in contact with loads such as laundry in the laundry accommodating cavity, thereby sensing the drying degree of the laundry at a short distance, and the accuracy of determining the drying degree of the laundry in the laundry accommodating drum is thus effectively improved.

The invention relates to a high-conductivity fingerprint-resistant galvanized sheet and a production method thereof. Strip steel comprises the following chemical components: 0.001%-0.460% of C, 0.01%-0.80% of Si, 0.20%-2.60% of Mn, 0.01%-0.50% of Cr, 0.01%-0.25% of Mo, less than or equal to 0.10% of Ni, less than or equal to 0.10% of Cu, less than or equal to 0.500% of Nb, less than or equal to 0.300% of Ti, less than or equal to 0.008% of V, less than or equal to 0.005% of B, 0.015%-0.045% of Al, less than or equal to 0.004% of N, less than or equal to 0.080% of P, less than or equal to 0.012% of S and the balance of Fe and impurities. The surface of the strip steel is plated with a fingerprint-resistant film. For strip steel with different thicknesses and different strength grades, the finishing rolling force, the surface roughness and the film weight of the fingerprint-resistant film are accurately controlled; an air cooling film mode is adopted, and for strip steel of different thicknesses, the plate temperature after drying, the plate temperature after cooling of an ascending section, the plate temperature after cooling of a horizontal section and the plate temperature after cooling of a descending section are accurately controlled; and finally, the surface conductivity of the fingerprint-resistant galvanized sheet finished product is improved.

Disclosed herein is a titanium plate with excellent surface conductivity and excellent durability. The titanium plate for a fuel cell separator according to the present disclosure includes: a titanium (Ti) base material including, in mass%, Si: 0.001 to 0.09%, a remainder Ti, and inevitable impurities; and a surface coating layer in which a content of each of Ti, Si, and O exceeds 0% when measured by angle-resolved X-ray photoelectron spectroscopy using an Al-Kα X-ray source under a condition where a photoelectron takeoff angle is 45°. The surface coating layer satisfies a following formula (1): 0.2≤Siat.% / Tiat.%+Siat.%≤0.8

The application provides a long carbon chain modified PA66 composite material and a preparation method thereof, and belongs to the field of polymer material modification. The long carbon chain molecule containing both quaternary ammonium salt cation groups and siloxane groups is combined with functional nanoparticles, and is co-grafted and modified on the surface of the PA66 molecule pre-grafted with amino acids to prepare a PA66 composite film with super-hydrophobic function and antistatic performance, so as to solve the problems that the existing PA66 material has strong hygroscopicity, weak antistatic capacity and cannot be applied in the high-end electronic and semiconductor fields. The long carbon chain modified PA66 composite material prepared by the application has excellent super-hydrophobicity and antistatic performance, and can maintain stable surface conductivity in different humidity environments, and still maintains stability after physical friction and solution erosion, and the preparation process is simple, suitable for large-scale production and application, and shows high development potential.

This invention belongs to the field of flow batteries, specifically relating to a high-strength flexible bipolar plate and its preparation method. The method includes: electrospinning and carbonizing a spinning solution containing polyacrylonitrile, metal salts, and organic acids to obtain carbon fiber filaments; extruding and granulating materials such as PE, EPDM, carbon black, and antioxidants, followed by crushing and grinding to obtain elastomer powder; dissolving polyimide in DMF, adding EPDM-PE powder, and then ultrasonically dispersing and vacuum distilling to obtain a concentrated solution of polyimide-coated EPDM-PE core-shell structure; and hot-pressing the concentrated solution with carbon fiber filaments and graphite, respectively. The bipolar plate prepared by this invention possesses high strength, high conductivity, and good flexibility, with a tensile strength ≥40MPa, surface conductivity ≥256S / cm, and bulk resistance ≤10mΩ·cm². After 100 cycles in a vanadium redox flow battery, its energy efficiency is ≥82.1%, making it suitable for high-performance flow batteries.

The present invention aims to provide a fuel cell separator material that simultaneously ensures manufacturing cost, conductivity, and durability by adjusting the composition of the titanium (Ti) base material and easily forming a conductive oxide layer on the surface coating layer, and does not require additional coating. [Solution] A titanium separator plate material with excellent surface conductivity and durability is disclosed. The titanium plate material for a fuel cell separator plate according to the present invention comprises a Ti base material consisting of, by mass%, 0.001 to 0.09% Si, the remainder Ti, and unavoidable impurities, and a surface coating layer in which the contents of Ti, Si, and O measured by X-ray angle-resolved photoelectron spectroscopy using an Al-Kα X-ray source at a photoelectron takeoff angle of 45° are each greater than 0%. The surface coating layer is characterized by satisfying the following formula (1): Formula (1): 0.2 ≦ Si(at.%) / [Ti(at.%)+Si(at.%)] ≦ 0.8

The invention discloses a wave-absorbing filler based on lamellar graphite and application of the wave-absorbing filler in a solvent-based coating, and belongs to the technical field of coatings. The in-situ growth catalyst and ethyl alcohol are mixed, then phenolic resin and lamellar graphite are added, the mixture is cured and calcined into wave-absorbing filler, carbon nanowires with morphological characteristics are formed on the surface of the lamellar graphite, and the wave-absorbing filler is applied to preparation of solvent-based paint. The metal powder is used as a catalyst and a magnetic loss main substance to promote the growth of the carbon nanowires, and the surface conductivity of the lamellar graphite is adjusted by changing the incomplete graphitization of the phenolic resin, so that the behavior of the material on electromagnetic waves is changed from reflection to absorption, and the electromagnetic waves are converted into heat energy to be released.

Disclosed is a titanium plate for a fuel cell separator, which has excellent surface conductivity and durability. The titanium plate for a fuel cell separator according to the present invention comprises a base metal and a surface oxide layer, the base metal comprising, by weight%, 0.001-0.09% of Si, 0.065% or less of Fe, and the balance of Ti and unavoidable impurities; the surface oxide layer contains, by weight%, 0.20% or less of Si, 0.20% or less of O, and the balance of Ti and unavoidable impurities. Wherein the surface oxide layer may satisfy formula (1) at a point where the weight% of O is a maximum value. Formula (1): 0.05 < = Si / (Ti + O) < = 0.4 wherein Si, Ti, and O represent the content (wt%) of each element.

The present invention aims to provide a fuel cell separator material that simultaneously ensures manufacturing cost, conductivity, and durability by adjusting the composition of the titanium (Ti) base material and easily forming a conductive oxide layer on the surface coating layer, and does not require additional coating. [Solution] A titanium separator plate material with excellent surface conductivity and durability is disclosed. The titanium plate material for a fuel cell separator plate according to the present invention comprises a Ti base material consisting of, by mass%, 0.001 to 0.09% Si, the remainder Ti, and unavoidable impurities, and a surface coating layer in which the contents of Ti, Si, and O measured by X-ray angle-resolved photoelectron spectroscopy using an Al-Kα X-ray source at a photoelectron takeoff angle of 45° are each greater than 0%. The surface coating layer is characterized by satisfying the following formula (1): Formula (1): 0.2 ≦ Si(at.%) / [Ti(at.%)+Si(at.%)] ≦ 0.8

The invention provides a doped and coated modified lithium-rich manganese-based positive electrode material, a preparation method thereof and a battery, and the preparation method comprises the following steps: merging a manganese-rich mixed salt solution, an alkaline solution and an EDTA (Ethylene Diamine Tetraacetic Acid) solution, injecting into a base solution to prepare a precursor, mixing the precursor with a tantalum source, a tungsten source and a magnesium source, and carrying out solvothermal reaction to obtain a doped precursor; and mixing the doped precursor with a lithium source, carrying out sintering treatment to obtain a lithium-rich material, mixing the lithium-rich material with the lithium tantalate sol, evaporating a solvent, and carrying out calcination treatment to obtain the doped and coated modified lithium-rich manganese-based positive electrode material. According to the invention, the lithium-rich manganese-based positive electrode material is doped, coated and modified, so that the two core problems of unstable bulk phase structure and unstable surface interface of the lithium-rich manganese-based positive electrode material are solved, the surface conductivity of the material is improved, and the dissolution of transition metal ions is inhibited.

The application belongs to the technical field of flexible electronic micro-nano manufacturing, and discloses a plasma-assisted insulating surface electrohydrodynamic jetting method and application, which comprises the following steps: modifying the surface of an insulating substrate by using plasma to inject active groups into the surface of the insulating substrate to improve the surface conductivity and bulk conductivity of the insulating substrate, and then performing electrohydrodynamic jetting; wherein the surface of the insulating substrate treated by plasma forms a coral-like structure. The plasma modification treatment changes the micro-nano structure of the surface of the insulating substrate, injects active groups into the surface of the insulating substrate, changes the charge trap energy level distribution of the surface of the insulating substrate, improves the surface conductivity and bulk conductivity of the insulating substrate, these changes inhibit the accumulation of charges on the insulating surface and accelerate the dissipation of charges, eliminate the distortion of the electric field, and thus optimize the electrohydrodynamic jetting effect on the surface of the insulating substrate.

The present application relates to a kind of based on PTFE silica gel composite porous elastic skeleton piezoresistive film and its preparation method, including composite porous elastic film substrate and gradient conductive layer, the composite porous elastic film substrate is by the three-dimensional porous skeleton of modified PTFE fiber and the solidified silica gel elastomer of optional coating in the fiber intersection node of this porous skeleton, the gradient conductive layer is for covering from the inside of composite porous elastic film substrate to surface, the three-section gradient conductive layer of gradually increasing electrical conductivity.In 50000 times cyclic compression, elastic recovery rate still keeps 94% or more, resistance signal drift≤3%, it is especially suitable for being applied to the robot dexterous hand tactile system of extremely high reliability and durability requirement.

The present application relates to a kind of high-conductivity fingerprint-resistant galvanized sheet and its production method, strip steel chemical composition is C:0.001%~0.460%, Si:0.01%~0.80%, Mn:0.20%~2.60%, Cr:0.01%~0.50%, Mo:0.01%~0.25%, Ni≤0.10%, Cu≤0.10%, Nb≤0.500%, Ti≤0.300%, V≤0.008%, B≤0.005%, Al:0.015~0.045%, N≤0.004%, P≤0.080%, S≤0.012%, the rest is Fe and impurity;The surface of strip steel is plated with fingerprint-resistant film.For different thickness, different strength grade strip steel, accurately control the finishing rolling force, surface roughness and fingerprint-resistant film weight;Air-cooled film is used, and for different thickness of strip steel, accurately control the plate temperature after drying, the plate temperature after cooling in rising section, the plate temperature after cooling in horizontal section and the plate temperature after cooling in falling section;Finally, the surface conductivity of fingerprint-resistant galvanized sheet product is improved.

The present application relates to the technical field of laundry treatment. Provided is a laundry treatment apparatus. The laundry treatment apparatus comprises a laundry accommodating drum, a lifting rib, and an electrical conductivity measurement device, wherein the laundry accommodating drum has a laundry accommodating cavity; the lifting rib is arranged in the laundry containing cavity; and at least part of the electrical conductivity measurement device is arranged on the outer surface of the lifting rib. At least part of the electrical conductivity measurement device is arranged on the outer surface of the lifting rib, and the electrical conductivity measurement device can be in contact with loads such as laundry in the laundry accommodating cavity, thereby sensing the drying degree of the laundry at a short distance, and the accuracy of determining the drying degree of the laundry in the laundry accommodating drum is thus effectively improved.

The invention provides a long carbon chain modified PA66 composite material and a preparation method thereof, and belongs to the field of high polymer material modification. Long carbon chain molecules containing both quaternary ammonium salt cation groups and siloxane groups are combined with functional nanoparticles, co-grafting modification is carried out on the surfaces of PA66 molecules pre-grafted with amino acid, and the PA66 composite film with the super-hydrophobic function and the anti-static performance at the same time is prepared. The problems that an existing PA66 material is high in hygroscopicity and poor in antistatic capacity and cannot be applied to the fields of high-end electronics and semiconductors are solved. The long-carbon-chain modified PA66 composite material prepared by the invention has excellent super-hydrophobicity and antistatic property, can keep stable surface conductivity in different humidity environments, still keeps stable after physical friction and solution erosion, is simple in preparation process, is suitable for large-scale production and application, and shows very high development potential.

This invention belongs to the field of lithium battery technology and discloses a lithium-rich manganese cathode material with a nanoporous structure, comprising a lithium-rich manganese cathode material matrix and a fluorocarbon organic compound coating layer on the surface of the matrix. The lithium-rich manganese cathode material matrix has a nanoporous structure layer near the fluorocarbon organic compound coating layer. This nanoporous structure can effectively improve the wettability of the material with the electrolyte, increase the utilization rate of lithium-rich manganese active material, reduce uneven polarization inside the electrode, and alleviate internal stress; however, it will also reduce the structural stability of the material and increase the gas generation and water absorption of the material. Therefore, this invention also includes fluorocarbon organic compound coating, which can improve the structural stability and surface stability of the material, increase the surface conductivity of the material, and reduce the surface water absorption of the material. The synergistic effect of the two can effectively solve the problems of low initial coulombic efficiency, rapid capacity and voltage decay, poor rate performance, and severe gas generation at high temperatures in lithium-rich manganese cathode materials.