46 results about "Metallicity" patented technology

The invention provides a two-dimensional slice material enhanced metal-based composite. According to the composite, metal is adopted as a base body, two-dimensional transition metal carbide or carbonitride, namely, MXenes is adopted as a reinforced phase, and MXenes particles are evenly dispersed in metal base body particles. Due to the fact that the MXenes material comprises a hollow carbon position and tends to metallicity, the metal base body has good wettability, and the interface bonding strength of the metal-based composite can be effectively improved. Therefore, the mechanical performance, wear resistance and other performance of the metal-based composite are enhanced. Meanwhile, the electronic coupling effect of the MXenes material and a metal base body interface is better, and the problem that in the prior art, the mechanical performance and corrosion resistance of the metal-based composite are improved through the reinforced phase, and meanwhile the heat conducting and electrical conducting performance of the metal-based composite is reduced can be avoided.

A low resistance grounding system single phase grounding fault protection method belongs to the power distribution network relay protection field. A generation probability of a low resistance grounding system high resistance grounding fault is large. A zero sequence overcurrent protection method of a traditional fixed setting value is easy to generate unwanted operation. In the method, according to a relation among a fault point transition resistor, a zero sequence voltage and each outgoing line zero sequence current when a grounding fault is generated, the zero sequence voltage is taken as a brake amount so as to determine a zero sequence overcurrent protection setting value. If a zero sequence voltage amplitude is greater than a knee point voltage, the zero sequence overcurrent protection setting value is increased according to a certain proportion; otherwise, the zero sequence overcurrent protection setting value keeps the same and is a set value during normal operation. By using the method, adaptive adjustment of the zero sequence overcurrent protection setting value under the condition of the different transition resistors can be realized; and protection sensitivity to a small resistance grounding fault and a metallicity grounding fault and protection reliability to a high resistance grounding fault are considered.

The invention discloses a method for separating enriching metallic and semiconductor carbon nano-tubes from single-walled carbon nano-tubes. The method of the invention is that: first, purified carbon nano-tubes of 1 weight account that waits for separation and 0.05 to 2 weight accounts of separating accelerator are taken to be added into organic solvent for ultrasonic mixing and lead the separating accelerator to sufficiently adsorb the specific carbon nano-tube, then liquid and sediments are separated, carbon tubes that are suspended in the liquid are separated, and products of enriching metallic carbon-tubes are acquired; next, 1 weight account of sediment and 0.05 to 2 weight accounts of the separating accelerator are taken to be added into the organic solvent for ultrasonic mixing processing, then sediments and liquid are separated, carbon tubes that are suspended in the liquid are separated, and products of enriching semiconductor carbon tubes are acquired.

The invention discloses a carbon nanotube array organic pollutant sensor and an application thereof. The preparation method of the sensor comprises the following steps: firstly adopting chemical vapor deposition or AC electrophoresis methods to prepare directional single-walled carbon nanotube array with mixed metallicity and semiconductivity on substrate; then adopting overload current to burn up the carbon nanotube with metallicity in the carbon nanotube array, adopting metal nanoparticles to modify the obtained carbon nanotube array with semiconductivity; and finally photoetching interdigitated finger electrode or performing metal film deposition to prepare interdigitated finger electrode on the surface of the carbon nanotube array treated through the metal nanoparticles modification. The sensor of the invention completely has the carbon nanotube array structure with semiconductivity, has the property of realizing the field effect at room temperature, can increase the identity and selectivity of the elements for different organic molecules, and can be used for the sensitive detection of NO, NO2 and benzene series organic gas contaminations in and out of the room or in space.

The invention discloses a broadband absorber based on a double-ring structure of graphene. With metal as a reflective substrate, an insulating dielectric layer and a graphene layer are above the reflective substrate in order. The graphene layer is formed by a periodic monolayer graphene double-ring structure. Since the graphene exhibits strong metallicity in infrared and terahertz bands, a graphene structure is directly used as a resonant structural unit, a strong resonance coupling between graphene nanostructures realizes a single-layer broadband absorber, and the processing process of the structure is greatly simplified. Because of the unique electrical properties of the graphene, a chemical potential and a surface conductivity can be changed by the change of applied bias voltage, and the absorption frequency range of an absorbing structure is regulated. The broadband absorber has the advantages of a simple structure and high absorption efficiency and has important application prospects in the fields of terahertz imaging, sensing, a continuous light source and the like.

The invention discloses a matched electrode of 800 MPa-grade weathering steel for a bridge and a production method of the matched electrode. The electrode is mainly composed of an H08GX core wire and a coating wrapping the surface of the core wire, and is characterized in that the coating comprises, by weight, 20.0-35.0% of marble, 25.0-40.0% of fluorite, 4.0-9.0% of rutile, 1.8-2.5% of ferromolybdenum, 1.8-2.5% of chromium metal, 3.0-8.0% of silica powder, 2.0-4.0% of silicon iron, 4.0-6.0% of nickel powder, 0.4-0.8% of sodium carbonate, 0.4-0.8% of CMC, 5.2-6.2% of electrolytic manganese, 8.0-11.0% of reduced iron powder, 1.5-3.0% of ferrotitanium and 0.6-1.0% of copper powder. The electrode has the good processing property and the good ductility and toughness. The good effects of improving a welding structure and the mechanical property of weld seams are achieved by reasonably matching all the components of the electrode, and the good welding seam metallicity is achieved.

The invention discloses a preparation method of metallic graphene. The method comprises the following steps: a, placing a clean copper sheet into a chemical vapor deposition furnace always vacuumizing, to obtain graphene; b, depositing gold, copper, aluminum, titanium and other metals on the graphene obtained in the step a; c, placing the graphene deposited with 1-5nm of metal obtained from the step b into a vacuum annealing furnace, annealing at the temperature of 100-500DEG C, maintaining the annealing within 24h, cooling a vacuum annealing furnace to room temperature, and taking out the graphene deposited with 1-5nm of metal, namely metallic graphene. The metallic graphene not only maintains the characteristics of single-layer graphene, but also shows metallicity.

The invention relates to a class of metal oxide materials with a special microstructure, and a preparation method thereof, and belongs to the field of materials. A purpose of the present invention isto solve the problem of large-scale and low-cost production of high-performance metal oxides for energy storage and catalysis. According to the present invention, a multi-component metal oxide AxMyOz(A represents one or a plurality of elements selected from elements with strong metallicity, M represents one or a plurality of elements selected from transition metal elements or germanium, antimony,indium and other elements with weak metallicity, and O represents oxygen) is used as a raw material, and is subjected to A site element removing through etching with an acidic solution (an aqueous solution or organic solution with a pH value of less than 7) to prepare the metal oxide material, wherein a variety of microstructures such as an amorphous porous material, a mono-dispersed nano-crystalmaterial, a self-assembled nanometer hairball-like material, a porous nano-crystal material, a hollow material, a core-shell structure material and the like can be obtained by controlling experimental conditions. According to the present invention, the method is simple and effective, and does not require complicated post-treatment process, and the product can be widely used in the fields of industrial reaction catalysts or catalyst carriers and new energy.

The invention relates to a line fault identification method using polar fault current principle component cluster analysis, and belongs to the technical field of DC power transmission line protection. A batch of line metallicity grounding faults and line external faults are preset from near to far within a full-line-length scope, the sampling rate is 10kHz, a line fault curve of a fault current curve cluster of a measurement end is obtained through electromagnetic transient simulation, after the fault current curve cluster is subjected to normalization processing with a mean value of 0 and a variance of 1, principle component analysis (PCA) is carried out, a PCA space is formed, two clustering point clusters reflecting the line faults and the external faults are formed in the PCA space, a projection ot (q1, q2) of test sample data on a PC1-PC2 coordinate axis of the PCA cluster space is calculated, and distances between the test sample data and the cluster centers of the current curve clusters are measured by use of Euclidean distance so that the line faults are identified.

Present invention refers to method determining sparse magnetic semiconductor gallium manganese arsenium ferromagnetic transition thermometric through measuring transport property. It features 1, etching gallium manganese sample to Hall element shape, making electrode adopting indium pressure welding technology, said electrode connected with constant current source and voltmeter, 2, putting Hall element in closed loop refrigeration system, 3, measuring Hall element tangential grinder resistance with thermometric relation curve, determining gallium manganese arsenium conduct characteristic, phase transition temperature from insulativity converting to metallicity, thereby determining gallium manganese arsenium thin-film ferromagnetic transition temperature.

The invention provides a method for basing on that frequency-dependent metallicity material inhibits microwave filter parasitic pass band belonging to the technology field of microwave communication, through a manner of an actuation probe in input and output coupling structure of the filter and increasing frequency-dependent metallicity material among short-circuiting pistons, in contrast to center frequency of the filter, the actuation probe is positioned on a potential antinodal point, and in contrast to center frequency of the parasitic pass band, the actuation probe is positioned on a potential nodal-point, thereby inhibiting the parasitic pass band. The invention not only can inhibit the parasitic pass band which is in even multiple frequencies of the center frequency, but also can inhibit the parasitic pass band which is in odd multiple frequencies of the center frequency, furthermore, and has the advantages of adjustability, wide applicability, simple structure and easy realization and the like.

The invention discloses a half-metallic bismuth nanoribbon, half-metallic bismuth nanospheres and a hydrothermal preparation method of the half-metallic bismuth nanoribbon and the half-metallic bismuth nanospheres. The half-metallic bismuth nanoribbon and the half-metallic bismuth nanospheres have half-metallicity. By changing the conditions such as the reaction time, the raw material ratio and surfactants, the shapes and sizes of the nanoribbon and the nanospheres can be adjusted and controlled. The bismuth nanoribbon is 30 nm to 5 microns wide and 5-50 microns long. The diameter of each half-metallic bismuth nanosphere is 20 um to 1 micron. The half-metallic bismuth nanoribbon and the half-metallic bismuth nanospheres can be applied to the fields of photoelectric materials, thermoelectric materials and microelectronic devices based on quantum confinement, the giant magnetoresistance effect, the Hall effect and the like. According to the half-metallic bismuth nanoribbon, the half-metallic bismuth nanospheres and the preparation method, the reducibility of a reaction solvent is utilized, other organic modifiers are not needed, the preparation method is simple, and the cost is low.

The invention provides a cutting tree, which comprises a trunk, branches, leaves, and a base. A plurality of jacks are arranged on the trunk; the branches are a plurality of rod-like solid matters or hollow matters, which are thinner than the trunk; the leaves are sheet materials, and at least a part of sheet materials of the leaves are fixed around the branches by winding, which provides the branch with leaves; the branches with leaves are inserted into the jacks in the trunk, thus an integral tree is formed. The connection method of the trunk and the branches of the cutting tree is insertion by which the branches can directly insert into the jacks of the trunk. The connecting structure is very simple, but is firm and stable by connection, convenient in installation, disassembly and storage, and real and beautiful. The leaves are made of plastic, which is light in weight, not easy to deform or kink, high similar to metallicity; the branches are varnished with a layer of insulating varnish, so even made of metal materials and put outdoors, the branches are not easy to rust and can be placed indoors or outdoors for a long time.

The invention relates to an anthraquinone hydrogenation catalyst, and a preparation method and application thereof. The catalyst is prepared by the following steps: taking alumina as a carrier, compounding rare earth elements and alkali metal elements, carrying out glue forming, aging, forming and roasting, and then supporting nickel and palladium as active metals. According to the catalyst prepared by the method provided by the invention, with the introduction of the rare earth elements, the growth of alumina grains in the high-temperature treatment is inhibited, the specific surface area ofthe catalyst is increased, the dispersity of the active metals is increased, and the alkalinity of the surface of the carrier is enhanced; with the introduction of the alkali metal elements, the surface property of the carrier is improved, the distribution of the active metals and the desorption of hydrogenation products are facilitated; and the rare earth elements are diffused to the surface andare oxidized for forming oxides, and the oxides can act with nickel for forming an intermetallic compound, so that the metallicity is easy to retain, and when the catalyst is applied to an anthraquinone hydrogenation reaction, the hydrogenation efficiency is greatly improved.

The invention discloses a turn-to-turn insulation defect detection method which comprises the following steps: in a first step, a superimposed circuit formed via superimposition of a power frequency circuit and a high frequency pulse oscillation circuit; in a second step, one end of a dry type hollow reactor is connected with a first detection point of the superimposed circuit while the other end is connected with a second detection point of the superimposed circuit; in a third step, a second switch K1 is turned off, a first switch is turned on, the dry type hollow reactor L is connected with the high frequency pulse oscillation circuit, and whether the dry type hollow reactor L has turn-to-turn insulation defects is determined; if the dry type hollow reactor L has the turn-to-turn insulation defects, fourth step to sixth step are performed; whether the turn-to-turn insulation defects are metallicity breakdown, low-resistance breakdown and high-resistance breakdown is determined; positioning operation is conducted according to different defect properties. Via the turn-to-turn insulation defect detection method, a problem that the turn-to-turn insulation defects of a conventional dry type hollow reactor cannot be positioned is solved, and the defects can be accurately positioned.

A preparation method of a nano-titanium enhanced paper base friction material comprises the following steps: dissolving phenolic resin in absolute ethyl alcohol to obtain A; dispersing multiwalled carbon nanotube in a SDS aqueous solution to obtain B; dispersing nano-titanium in a mixed liquor of ethanol and sodium oleate to obtain C; dispersing short carbon fiber and bamboo fiber in water to obtain D; mixing C and D to obtain E, and pouring B into E to obtain F; pouring F into a fluffer for dispersion, making sheets by a sheet-making machine, and drying to obtain a sample wafer G; putting the sample wafer G into a vacuum filter, slowly injecting A at uniform speed to soak the sample wafer G in A, taking out the sample wafer G and drying, and carrying out hot briquetting by a vulcanizer so as to obtain the nano-titanium enhanced paper base friction material which has stable friction and wear properties. Through a dispersion-mixing technology, a nano-titanium suspended emulsion is added into a paper pulp mixture so as to enhance abrasive resistance of the paper base friction material through metallicity of titanium and raise friction coefficient of the paper base friction material.

The present invention relates to a pyrite structural iron-based ternary chalcogenide single crystal material and a preparation method thereof. The molecular formula of the single crystal material is FePd2Se6, and the lattice constants a, b, and c satisfy the following relationship: a=b=c=6.045(3) angstroms, the electrical transport shows metallicity, the magnetism shows that a significant hysteresis loop exists at 1.8K, and the preparation method comprises the following sequential steps: 1) a Fe source, a Pd source and a Se source are weighed, the weighed materials are mixed and loaded into analuminium oxide crucible, and then the aluminium oxide crucible is sealed; and 2) the sealed aluminium oxide crucible is placed into a high-temperature annealing furnace, and a program begins to setfor heating; and then a fluxing agent Se is removed by adopting centrifugation to obtain the FePd2Se6 single crystal. According to the invention, the pyrite structural iron-based ternary chalcogenidesingle crystal FePd2Se6 is prepared by using a self fluxing agent method, and has the advantages of low costs, easy control, good repeatability, simple equipment and the like.

The invention discloses a graphene based waveguide path selector. The graphene based waveguide path selector comprises a selector body; the selector body is a cuboid; the selector is mainly formed by a graphene layer which is made of graphene materials, a continuous coating layer and an interrupt groove layer which are made of semiconductor materials and a substrate layer, a positive ladder body, a filling layer and a concave ladder body which are made of non-conducting materials. According to the graphene based waveguide path selector, the waveguide path selector is constructed according to the voltage adjustable character of the graphene, then connection and disconnection of SPP waves on different areas of the graphene can be controlled due to continuous change of the voltage, and accordingly waveguide path selection is achieved and additionally, the broadcasting distance of the SPP waves in the waveguide path selector is far relatively due to the character that an imaginary part of the electrical conductivity of the graphene shows metallicity when being larger than zero and does not generate large attenuation after entering of electromagnetic waves.

The invention discloses a novel pit-type vacuum heat treatment furnace and a heat treatment process thereof. The vacuum heat treatment furnace comprises a furnace body 1, a cover body 2 and a motor 3 which is arranged on the top of the cover body 2 and provided with stirring wings. A groove is formed in the top end of the furnace body 1 along the periphery of the furnace body 1. A boss capable of being buckled in the groove is formed in the peripheral direction of the cover body 2. When sealing is conducted, the boss is buckled in the groove, the groove is filled with fine sand at the joint of the groove and the boss, and thus the joint of the groove and the boss is covered. Due to the fact that the joint of the groove and the boss is covered with the fine sand, no sealing ring is used any more, and the use cost of the heat treatment furnace is greatly lowered; meanwhile, the situation that a sealed position is not sealed completely due to deformation of a sealing ring is avoided, and the vacuum state is maintained all the time in the heat treatment procedure. By the adoption of the process method, the heat treatment process level and the metallicity of parts are improved.

The invention belongs to the technical field of automobile friction plates and in particular relates to a high-metal automobile friction plate and a preparation method thereof. Raw materials of the high-metal automobile friction plate comprise the following components in percentage by weight: 5 to 20 percent of FeCoCrNi high-entropy alloy powder, 5 to 15 percent of sponge iron powder, 7 to 30 percent of metal fibers, 7 to 21 percent of non-metal fibers, 5 to 15 percent of artificial graphite, 5 to 8 percent of resin, 2 to 5 percent of rubber and the balance of calcium carbonate. Three components, which participate in alloying, of the FeCoCrNi high-entropy alloy powder have rust-proof and corrosion-proof effects; alloyed materials have a remarkable rust-proof effect, and an FeCoCrNi high-entropy alloy has very high tensile strength and good ductility; the friction coefficient of a friction material is easy to improve and the wear resistance of the friction material can be improved through the good ductility. The FeCoCrNi high-entropy alloy powder with an irregular shape is added, so that the friction plate has excellent weather resistance and corrosion resistance; meanwhile, the high metallicity and structural strength of the material are improved, so that the high and stable friction coefficient is obtained.

The invention discloses an electrochemical anode preparation method and an electrochemical anode. The preparation method includes the steps: taking a porous metal material as a base material; preparing a middle layer containing metallic oxide on the surface of the base material; preparing a non-metallic conductive surface layer on the surface of the middle layer. The electrochemical anode comprises the porous metal material serving as the base material, the middle layer containing the metallic oxide and the non-metallic conductive surface layer. According to the electrochemical anode, the non-metallic conductive surface layer is used as the surface layer of the electrochemical anode, falling of the non-metallic conductive surface layer due to chemical dissolution in acid-containing environments with hydrochloric acid or sulfuric acid and the like is avoided, and the performance of the electrochemical anode cannot be affected. Besides, the electrochemical anode comprises the porous metal material serving as the base material, the middle layer containing the metallic oxide and the non-metallic conductive surface layer from inside to outside and gradually changes from metallicity to metalloid characters. Compared with direct recombination of the porous metal material serving as the base material and the non-metallic conductive surface layer, connection is closer, and falling of the non-metallic conductive surface layer is avoided.

The present invention relates to a high volumetric specific capacitance flexibility molybdenum sulfide gel film electrode materials and a preparation method thereof. The concrete steps of the method comprise: (1) mixing molybdenum sulfide powder and n-butyllithium normal hexane solution to perform a lithium intercalation reaction, wherein the reaction products are cleaned by employing normal hexane; (2) adding deionized water into the products, configuring the molybdenum sulfide dispersion liquid, and performing peeling fragmentation processing by employing an ultrasonic wave cell disruptor; (3) performing centrifugation of the molybdenum sulfide dispersion liquid with peeling fragmentation, and obtaining a metallicity molybdenum sulfide dispersion liquid; (4) employing a mixed cellulose filter film to perform vacuum filtration of the metallicity molybdenum sulfide dispersion liquid; and (6) putting molybdenum sulfide gel attached to the mixed cellulose filter film into the ionic liquid aqueous solution for replacement, and obtaining the product after vacuum drying. Compared with the prior art, the prepared molybdenum sulfide gel film electrode materials has high volumetric specific capacitance are taken as a supercapacitor electrode to display the good volumetric specific capacitance.

A pair of functional metal ion bands are provided. The pair of functional metal ion bands are attached to meridians and acupoints of the human body in a simple manner to induce a smooth flow of current in the body, thereby rapidly changing a disease condition to a normal state. The pair of functional metal ion bands comprise a gold-colored thin metal plate as a positive electrode and a silver-colored thin metal plate as a negative electrode wherein the gold-colored thin metal plate is composed of Cu and a metal selected from Ag, Au and Pt and the silver-colored thin metal plate is made of an alloy of Al, Si, Fe, Cu, Mn, Mg and Zn. The pair of functional metal ion bands are manufactured by processing each of the thin metal plates to have a thickness of 1 μm to 1 cm and a diameter of 1 mm to 50 cm, and attaching the processed metal plate to one side of a soft adhesive fabric using an adhesive.

The invention provides a neural point grounding device and a control method thereof. The neural point grounding device comprises an arc suppression coil with one end connected with the neural point and the grounded other end; a resistor unit in parallel connect with the arc suppression coil and used for providing a resistor capable of changing a resistance; a controller for controlling the resistance of the resistor unit and the on-off of the resistor unit circuit. Through the neural point grounding device and the control method thereof provided by the invention, the resistance is maximal wheninputting an adjustable resistor at the primary input, the line metallicity grounding fault and the middle and low resistance grounding fault with large proportion can be judged, the fault current issmall, and the personal safety is guaranteed; for tiny minority of grounding fault with transition resistor as high resistance, the fault line is not distinguished, the adjustable resistor can be automatically adjusted to the minimum, the fault feature is further increased, and an accuracy rate of the fault selection is improved.

One purpose of the invention is to provide an infrared scene simulation platform construction method based on the 3D engine in order to solve the problem that an infrared simulation platform is difficult to obtain in the prior art, is long in independent research and development period and high in development cost. The method comprises the steps that a camera characteristic read-in interface is arranged in the 3D engine and used for determining the corresponding relation between the infrared scene gray scale and the infrared radiation brightness; an atmospheric attenuation characteristic read-in interface is arranged in the 3D engine and used for calculating atmospheric attenuation distribution; a self-luminous characteristic read-in interface is arranged in the 3D engine, wherein the self-luminous characteristic read-in interface is used for realizing self-luminous characteristic simulation of the object according to the input infrared band emissivity and the first correction coefficient; a transmission characteristic read-in interface is arranged in the 3D engine, wherein the transmission characteristic read-in interface is used for realizing transmission characteristic simulation of the object according to the input transmissivity and the second correction coefficient; and a reflection characteristic read-in interface is arranged in the 3D engine and is used for realizing infrared reflection characteristic simulation of the object according to the metallicity, the roughness and the spectral factor. The method and device are suitable for the field of infrared visual simulation.

The invention discloses a preparation method of metallic graphene. The method comprises the following steps: a, placing a clean copper sheet into a chemical vapor deposition furnace always vacuumizing, to obtain graphene; b, depositing gold, copper, aluminum, titanium and other metals on the graphene obtained in the step a; c, placing the graphene deposited with 1-5nm of metal obtained from the step b into a vacuum annealing furnace, annealing at the temperature of 100-500DEG C, maintaining the annealing within 24h, cooling a vacuum annealing furnace to room temperature, and taking out the graphene deposited with 1-5nm of metal, namely metallic graphene. The metallic graphene not only maintains the characteristics of single-layer graphene, but also shows metallicity.