1476 results about "Metallic particle" patented technology

To provide a metal paste capable of efficiently providing a joined body having reliability high in electrical and mechanical strength even when narrowed in pitch, and to provide a method for manufacturing the joined body.SOLUTION: A metal paste comprises metal particles and a solvent, and has a shear viscosity of 1 to 100 Pa_s, measured at a shear rate of 10 s-1 at 25°C, wherein a value (TI value) obtained by log-transforming a ratio of a shear viscosity measured at a shear rate of 0.1 s-1 and a shear viscosity measured at a shear rate of 1 s-1 is 0.7 to 1.0.SELECTED DRAWING: Figure 4

The invention provides a laser-induced sintering processing method which is applied to an 0BB double-sided electrode battery, a first electrode and a second electrode are adopted to make contact with all thin grid lines on the front face of a battery piece and all thin grid lines on the back face of the battery piece respectively, and a laser beam is controlled to scan the battery piece while reverse voltage is applied to the battery piece through the first electrode and the second electrode; the first electrode comprises N strip-shaped electrodes which are arranged at intervals; each strip-shaped electrode is vertically intersected and contacted with all the fine grid lines on the front surface of the battery piece; the width, needing to be scanned at a time, of the battery piece is divided into a plurality of areas, so that the distance between the strip-shaped electrode and the laser scanning area is shortened, the current density of each thin grid line is improved, the contact specific surface area of metal particles and silicon is increased, the contact resistance of the metal grid lines is reduced, and the service life of the battery piece is prolonged. Therefore, the purpose of high-efficiency laser-induced sintering of the 0BB double-sided electrode battery is achieved.

The invention discloses a method for reducing the inclusion degree of metal particles in additive manufacturing of a spaceflight propulsion chamber. The method comprises the following steps that 1, a printing layer data set is constructed; 2, constructing an initial multi-scale graph structure; 3, outputting an inclusion risk probability graph of the current printing layer based on a multi-scale graph growth generation network; 4, inputting the inclusion risk probability graph into a mimicry hummingbird optimization algorithm to generate a path optimization target space; 5, performing path search by adopting a mimicry hummingbird optimization algorithm, and outputting a final scanning path; 6, controlling a laser to perform printing and scanning operation according to the final scanning path; 7, inputting process feedback data into the multi-scale graph growth generation network, and outputting an updated inclusion risk probability graph of a next printing layer; and 8, the step 4 to the step 7 are executed repeatedly till all the printing layers are printed. According to the method, the multi-scale graph growth generation network and the mimicry hummingbird optimization algorithm are fused, and the metal particle inclusion degree is effectively reduced.

The invention discloses a metal particle Ni supported catalyst based on fly ash. The preparation method comprises the following steps: firstly, carrying out alkali fusion on fly ash to prepare powder; dissolving the powder and Ni (NO3) 2.6 H2O in a mixed solution of distilled water and absolute ethyl alcohol, adding polyethylene glycol, and performing ultrasonic stirring to obtain uniform dispersion liquid; and finally, continuously performing ultrasonic stirring on the dispersion liquid, performing hydrothermal reaction, cooling, performing centrifugal separation, drying, calcining, cooling and grinding to obtain the catalyst. The coal ash derivative zeolite is adopted as a carrier of the catalyst, Ni is loaded on the carrier to improve the specific surface and effective active sites of the carrier, the effective catalytic specific surface area of the catalyst is effectively improved, and the catalytic activity is improved, so that a stable and safe catalyst material for preparing methane through CO2 hydrogenation with high activity and selectivity is obtained; the space time yield of methane is high.

The present invention relates to the field of materials science, the field of nanomaterials, and the field of biomedical engineering, and in particular to an inorganic non-metallic nanoparticle-assembled hydrogel material and an application thereof inl additive manufacturing technology. The hydrogel material is assembled from inorganic non-metallic particles, so as to form a hydrogel network; the size of the inorganic non-metallic particles ranges from 10 nm to 20 um; the inorganic non-metallic particles account for 2-80 wt % of the total mass of hydrogel; and the hydrogel network has microscopic pores having a pore size ranging from 0.1 um to 30 um. The inorganic non-metallic particles are assembled into a hydrogel material by an electrostatic assembly method or a hydrophobic action assembly method or a magnetic action assembly method. The hydrogel material is additively manufactured to obtain a gel scaffold which is used as a bone repair scaffold or a cartilage repair scaffold. The hydrogel material of the present invention is directly applied to inorganic non-metallic additive manufacturing technology, without using an additive or a cross-linking agent.

The invention discloses a gas purification device for machining, and relates to the technical field of gas purification, the gas purification device comprises a barrel shell, a round cover is fixedly mounted on the top surface of the barrel shell, a gas suction hood penetrates through and is fixedly mounted at the bottom of the left side of the barrel shell, and a gas suction pump penetrates through and is fixedly mounted at the top of the right side of the barrel shell; a screen frame is fixedly installed at the bottom end in the barrel shell, the top face of the screen frame is fixedly connected with the top end in a round cover, an activated carbon plate is fixedly installed at the bottom end in the barrel shell, a heat dissipation shell is fixedly installed on the top face of the round cover, a servo motor is fixedly installed at the top end in the heat dissipation shell, and a screw rod is rotationally installed on the top face of the round cover in a penetrating mode. Dust particles and metal particles on the screen face of the screen frame are scraped off through the scraping plate, and therefore the problem that the air purification effect is poor due to the fact that a large number of dust particles and metal particles are attached to the screen face of the screen frame is solved.

An object is to provide a liquid chemical exhibiting excellent defect inhibitive performance even in a case of being applied to a resist process by KrF excimer laser exposure and ArF excimer laser exposure. Another object is to provide a method for analyzing a test target solution and a method for producing a liquid chemical.A liquid chemical includes an organic solvent; and metal-containing particles containing a metal atom and having a particle size of 10 to 100 nm, in which the number of the metal-containing particles contained is 1.0×10−2 to 1.0×1012 particles / cm3.

Composite materials with noble metal coated silver nanowires loaded into polymer are described. The composite materials may have resistivities of no more than about 100 Ohm-cm, or from about 100 Ohm-cm to about 1×1011 Ohm-cm depending on the amount of noble metal coated silver nanowires loaded into the polymer. The noble metal coated silver nanowires may be platinum coated silver nanowires. Metal particulates such as silver flakes or silver particles may be added to the composite materials in order to obtain desired properties. Composite precursor compositions and methods for preparing the composite materials are described.

The invention provides a negative electrode current collector and a preparation method and application thereof, and relates to the technical field of batteries. The negative electrode current collector provided by the invention comprises a metal net and slurry layers coated on two surfaces of the metal net, the slurry layer is mainly composed of a conductive carbon material, metal particles, a sodium-based fast ion conductor or a lithium-based fast ion conductor and a binder; the conductive carbon material is mainly composed of a point type carbon material, a linear carbon material and a surface type carbon material; and the porosity of the slurry layer is 30%-40%. The negative electrode current collector is low in cost, has a porous structure, has sufficient sodium metal or lithium metal deposition space, can enable sodium metal or lithium metal to grow in the negative electrode current collector when being used for a negative-electrode-free electrode, is small in volume change of a battery, and reduces the occurrence of sodium dendrites or lithium dendrites.

The invention discloses a powder metal particle removing system and method, and the method comprises the steps that powder is transferred into a preset container; mixing the powder materials in the container; putting the mixed powder into a sagger, and sintering to form a crystal structure; the sintered crystal structure is crushed and ground to the required particle size; and metal particles in the crushed particles are subjected to microwave oxidation. According to the scheme provided by the invention, after the powder is transferred into the preset container to be mixed, the powder is sintered in the sagger, then the sintered powder is ground, and finally the ground powder is subjected to microwave heating by utilizing the microwave oxidizer. After the microwave irradiates the powder, the metal particles contained in the powder can be quickly oxidized, the heating speed is high, the efficiency is high, the corresponding metal particles can be effectively removed, and the removal efficiency is high.

The invention discloses a metal self-dispersed low-carbon alkane dehydrogenation catalyst as well as a preparation method and application thereof. The catalyst is composed of a molecular sieve carrier, metal particles of main active components Ru, Rh, Pd, Ir, Pt and Au, auxiliary components Fe, Co, Ni, Cu, Zn, Ga, In, Ge, Sn, Mn, Zr, V, Cr, Ti, Nb, Mo, Y, W, Pb, Sc, Bi, Sb, La and Ce, and alkali metal components Na, Mg, K, Ca and Cs. Firstly, the synthesized molecular sieve is subjected to high-temperature activation heat treatment, so that rich defect sites are generated; and mixing the activated molecular sieve with metal particles, and finally carrying out high-temperature treatment on the mixture in an oxygen atmosphere to prepare the stable molecular sieve loaded metal cluster. The obtained catalyst shows excellent catalytic activity and regeneration performance. The active metal particles are used as raw materials, the step of converting metal particle powder into salt is reduced, a physical mixing method is adopted, the preparation process of the catalyst is simpler, and the economic cost is lower.

The invention discloses a conductive paste, a metallized substrate and a metallization process for manufacturing the metallized substrate, the conductive paste comprises metal particles, the particle size of the metal particles is 0.1-10 [mu] m, and the mass ratio of the metal particles is 80-98%; in the metallization process, a copper layer is arranged on the hole wall of a through hole or a blind hole of a substrate, then conductive slurry is filled in the hole with the copper layer, heating sintering treatment is carried out, and after heating sintering is carried out in an inert gas atmosphere at the temperature of less than or equal to 300 DEG C, metal particles can be fused to form a connection structure or a eutectic structure. A reinforcing layer can be formed between the nano metal particles and the copper layer, and the reinforcing layer is a metal bonding layer or an intermetallic compound layer. The metallization mode is suitable for a through hole or a blind hole of a glass / silicon / ceramic substrate with a high aspect ratio and a micro aperture, and the technical problems that complete filling is difficult to achieve and filling defects exist in an existing electroplating process, the electrical resistivity of conductive paste is high, and the interface bonding force is insufficient can be solved.

The invention discloses a solar cell and a photovoltaic module. The solar cell includes a semiconductor substrate having a first semiconductor layer on a first surface; the passivation layer at least covers one side, deviating from the semiconductor substrate, of the first semiconductor layer; a first seed layer electrically connected to the first semiconductor layer through the passivation layer; the first seed layer comprises a plurality of first metal particles and a plurality of second metal particles stacked on at least local surfaces of the first metal particles, the particle size of the first metal particles is a, the particle size of the second metal particles is b, and a-b is greater than or equal to 40nm and / or a is greater than or equal to 1.5 b. The surface roughness of the first seed layer can be increased, so that the specific surface area of the first seed layer is increased, more metal contact points exist between the first seed layer and the first grid line, more metal contact is formed, the contact resistance between the first seed layer and the first grid line is reduced, and the power generation efficiency of the battery is improved; meanwhile, the adhesive force of the first grid lines is improved, and the first grid lines can be prevented from falling off.

The invention relates to the technical field of inorganic non-metallic materials, in particular to an onion carbon preparation method based on a metal organic framework and onion carbon. The preparation method comprises the following steps: S1, synthesizing a metal organic framework precursor; s2, preliminary pyrolysis of the metal organic framework precursor; s3, etching and decomposing the formed metal particles; and S4, carrying out secondary pyrolysis on the primary pyrolytic carbon material. The carbon diameter of the prepared onion is 5-20 nm, and the carbon layer spacing is 0.34 nm. According to the preparation method, a metal organic framework is taken as a precursor, a two-step pyrolysis method is adopted, the precursor is carbonized at high temperature, a carbon material is etched again by ammonia gas and other gases released by thermal decomposition of melamine, and under the action, graphene is rearranged in the form of the same sphere center layer to form onion carbon particles with uniform sizes. The temperature and the reaction time in the preparation process can be accurately controlled, the preparation process is simple, the cost is low, the prepared onion carbon has relatively high purity and uniformity, and the oxygen reduction catalytic activity can be improved.

The utility model provides a magnetic metal particle extraction device and a lithium battery positive electrode material production device, and relates to the field of production equipment. During use, a to-be-purified material (such as lithium battery positive electrode material precursor powder) is put into the containing main body, the magnetic piece is connected to the connecting piece at the bottom of the transmission rod and extends into the containing main body, the top of the transmission rod penetrates through the mounting hole in the cover body to be connected to the driving piece, and the cover body covers the containing main body to complete mounting work. And after the driving piece is started, the transmission rod drives the magnetic piece to rotate in the to-be-purified material, magnetic metal particles are adsorbed and extracted, the cover body is detached after adsorption is completed, and the magnetic piece is taken out. The magnetic metal particle extraction device provided by the utility model can realize dry extraction, reduce the operation time, reduce the waste of water resources and reduce the discharge of heavy metal wastewater.

The invention relates to a liquid metal gel material, a preparation method thereof and a thermal interface material, and belongs to the field of thermal interface materials. Wherein the liquid metal gel material comprises a modified polyethylene film, and the modified polyethylene film comprises a polyethylene film and metal particles attached to at least part of the surface of the polyethylene film; the modified polyethylene film is at least partially filled with the liquid metal. The liquid metal gel material provided by the invention has the advantages of low thermal resistance, high thermal conductivity, excellent mechanical properties and high stability in a dynamic environment, and can meet the use requirements of high-end fields on thermal interface materials.

The invention relates to a powder metal particle detection method, device and system, and the method comprises the steps: uniformly mixing a conductive liquid with to-be-detected powder to obtain a mixed liquid; wherein an electrode part is arranged in the mixed liquid, and the temperature of the conductive liquid is greater than or equal to a preset electrolysis temperature; a preset electrolysis voltage is applied to the electrode component to form an electrolysis path, and the electrolysis path is used for electrolysis of metal particles in the to-be-detected powder; and detecting the charging current of the electrolysis path, and determining the information of the metal particles contained in the to-be-detected powder according to the charging current and the preset electrolysis voltage. According to the embodiment of the invention, the detection efficiency and detection reliability of the metal particles can be improved.

The present application relates to the field of materials, and more specifically, to a silicon negative electrode material, a battery negative electrode sheet, and a lithium-ion battery. The silicon negative electrode material comprises a nano-sheet silicon-based material and a carbon coating layer, with a metal layer or metal particles between the carbon coating layer and the silicon-based material. The surface of the silicon negative electrode material of the present application has a carbon coating layer, which can effectively prevent the direct contact between the nano-sheet silicon-based material and the electrolyte, and the SEI film formed on the coating layer is thin and stable. In addition, there is a metal layer or metal particles between the nano-sheet silicon-based material and the carbon coating layer, and the good electrical conductivity of the metal can compensate for the poor electrical conductivity of silicon.

The invention discloses a preparation method of a vibration and noise reduction bimetal composite pipe, relates to the field of metal pipe processing, and aims to solve the problem of poor vibration and noise reduction performance of a traditional composite pipe. The preparation method comprises the steps that a composite pipe blank is provided and sequentially comprises a titanium alloy pipe and a stainless steel pipe from outside to inside, the titanium alloy pipe and the stainless steel pipe are fixed through a base, and an annular columnar filling cavity is defined by the titanium alloy pipe, the stainless steel pipe and the base; the filling cavity is filled with metal particle materials, the metal particle materials are compacted through a pressing block, and the open end of the filling cavity is sealed and welded through a cover plate; hot rolling is conducted on the composite pipe blank, and a first composite pipe blank sequentially comprising a titanium alloy layer, a porous metal layer and a stainless steel layer from outside to inside is obtained; and cutting off the pipe section of the base and the cover plate to obtain the composite pipe. And the porous metal layer formed by the metal particle material has good energy absorption performance and excellent sound insulation and heat insulation performance, so that the prepared bimetal composite pipe finally achieves the purposes of vibration and noise reduction.

To provide a metal paste for joining that prevents the occurrence of solvent separation even in high-humidity conditions while containing PEG, a method for producing a joint body using the same, and a joint body.SOLUTION: A metal paste for joining contains metal particles, a dispersion medium, and a reductant. The metal paste contains, as the reductant, polyethylene glycol. The metal paste contains a compound A having, within its molecule, at least one group selected from the group consisting of an amino group, a carboxyl group, and an acetylene group, as well as a hydroxy group.SELECTED DRAWING: None

The invention discloses an impedance self-adaptive high-frequency probe, a probe card and a testing method, and belongs to the technical field of semiconductor high-frequency testing. When an existing high-frequency probe is used for a crimping test, a conductive probe body of the existing high-frequency probe generates mechanical deformation due to contact pressure, so that characteristic impedance is deviated, and uneven pressure in an array causes impedance dispersion. The problem is solved by coating the outer side of the conductive needle body with a composite material layer, the composite material layer is composed of an elastic insulating matrix and metal particles dispersed in the elastic insulating matrix, the metal particles have bimodal particle size distribution, and the total integral number is 30%-40%. When the probe is pressed, the composite material layer is subjected to reversible microscopic reconstruction, the effective dielectric constant of the composite material layer is increased along with the increase of the pressure, and the generated impedance change can counteract the impedance drop caused by the deformation of the conductive probe body, so that the self-adaptive stability of the characteristic impedance of the probe under the change of the pressure is realized. The impedance dispersion of the probe array can be remarkably reduced, the consistency and precision of high-frequency testing are improved, and the process compatibility is good.

The invention relates to a metal particle defect diagnosis method, system, medium and equipment under alternating current superposition impact, in the method, alternating current superposition impact voltage is applied to a GIS for partial discharge, n groups of original waveform data are obtained through measurement, and the original waveform data comprise discharge time data, discharge current value data, discharge capacity data and a PRPD spectrogram; extracting and calculating characteristic values of partial discharge in the original data waveform, wherein the characteristic values comprise a discharge capacity maximum value x, average discharge delay time delta t between an impact applying moment and a partial discharge starting moment, and a partial discharge PRPD spectrogram; performing metal particle defect diagnosis according to the maximum value x of the average discharge capacity; and diagnosing the number of the GIS metal particles according to the average discharge delay time delta t and the PRPD spectrogram envelope, and judging the defect type of the metal particles.

The invention discloses a burning metal particle three-dimensional surface panoramic microscopic imaging measurement method. The method comprises the following steps: collecting a dynamic panoramic microscopic image of burning metal particles; the collected panoramic microscopic image is preprocessed, the combustion metal particles are cut out independently from the panoramic microscopic image, and a binary image of the combustion metal particles and a binary image of surface oxides of the combustion metal particles are obtained; modeling combustion metal particles by using a long ellipsoid geometric model to obtain a mapping relation between the three-dimensional surface of the combustion metal particles and the two-dimensional information of the collected panoramic microscopic image; and calculating the three-dimensional surface areas of the combustion metal particles and the surface oxides thereof according to the binary image of the combustion metal particles, the binary image of the surface oxides thereof and the mapping relation. According to the measurement method, the three-dimensional surface reconstruction of the combustion metal particles can be realized, the areas of the combustion metal particles and oxides thereof can be quantitatively obtained, and the dynamic process of oxide fragments on the surfaces of the combustion metal particles can be visualized.

Provided are methods, systems, and computer program products for lane keep tracking and / or localization of a vehicle using a radar to detect metallic particles in paint applied to lane markings or curb markings. An example method may include: causing a radar system of a vehicle to output radio waves; receiving a radar image from the radar system corresponding to returned radio waves; determining a portion of the radar image includes lane or curb markings, wherein the lane or curb markings are embedded with metallic particles; and determining a location of the vehicle based at least in part on the determined portion of the radar image that includes the lane or curb markings.

The present invention belongs to the technical field of magnetic materials, and particularly relates to a high-frequency magnetic composite material, a high-frequency magnetic device and a processing method thereof. Among them, the processing method of the high-frequency magnetic composite material includes: mixing magnetic metal particles with a magnetic vortex structure, a solvent and a non-magnetic ceramic phase material and grinding them into a slurry; placing the slurry in a mold and forming it under a low-temperature and low-pressure process; wherein, the conditions of the low-temperature and low-pressure process are that the temperature is lower than 300 °C and the pressure is less than 500 MPa. By using magnetic particles with a magnetic vortex structure, there are no magnetic domain walls in the present invention. At high frequencies, magnetization mainly occurs through magnetization rotation, rather than the traditional domain wall displacement mechanism, which can significantly increase the working frequency of the material to above 100 MHz; in addition, the low-temperature and low-pressure process is adopted to avoid various defects of extreme conditions such as high temperature and high pressure in the traditional process.

The invention provides liquid metal and application thereof, a cathode material and a micro cathode arc thruster, and belongs to the technical field of alloy materials. The liquid metal provided by the invention comprises a liquid gallium alloy and metal particles, the mass ratio of the liquid gallium alloy to the metal particles is (3.78-4.62): (0.3-6); the metal particles comprise one or more of titanium particles, silver particles, gold particles, copper particles and aluminum particles. The surface tension of the liquid gallium alloy is reduced and the viscosity of the liquid gallium alloy is improved by adopting the metal particles, the metal particles can overcome slight vibration, are adsorbed on the surface of the metal feeding pipe and do not flow willfully, the metal particles serve as a cathode working medium of the micro-cathode arc thruster, stable work can be achieved, and the service life of the thruster is prolonged.

The invention belongs to the technical field of metal material machining, and particularly relates to an ultrahigh-hardness material inner hole machining jig which comprises a rack and a first air cylinder arranged at the top of the rack, a first motor and a polishing rod are arranged at the moving end of the first air cylinder, and the polishing rod is fixedly arranged at the output end of the first motor. The workbench is fixedly arranged at the bottom of the rack, and a stretching hole is formed in the center of the upper surface of the workbench; and two second cylinders. The cutting edge of the cutter is protected through the cutting edge protection mechanism and the metal particle magnetic attraction mechanism, and scratches caused by chippings and metal particles are prevented; the clamping force is accurately controlled through the clamping force detection mechanism, the cutter is prevented from being damaged, and in the grinding process, the cutter is prevented from being damaged due to too large extrusion force; meanwhile, the automatic measuring and feeding mechanism can automatically measure the moving distance of the grinding rod, and operation is convenient; the machining quality and efficiency are integrally improved, and the machining precision and the later use performance of the tool are guaranteed.

The embodiment of the invention provides deposition equipment and a preparation process for preparing quartz glass base metal, and relates to the technical field of quartz glass preparation.The deposition equipment for preparing the quartz glass base metal comprises an equipment main body, the equipment main body is internally provided with a cavity, and the equipment main body is used for depositing a loose body in the cavity; and the first adsorption part is arranged on the equipment main body, and the first adsorption part is used for absorbing the metal particles in the cavity. According to the deposition equipment for preparing the quartz glass base material and the preparation process, the problems that in the prior art, the structural defects of the quartz glass base material are difficult to reduce, and the purity is difficult to improve are solved.

The invention discloses a test method for exploring the inhibition effect of a coating on GIL metal particles, and relates to the technical field of high-voltage transmission lines and insulation, the test is carried out in a GIL test platform, and the test method comprises the following steps: S1, selecting a coating material; s2, determining a film covering position; s3, selecting proper particles; s4, determining a particle placement position; s5, carrying out a pressurization test; and S6, observing the motion state of the particles under high voltage, recording the take-off voltage, the stop voltage and the distribution range of the particles, and analyzing the effect of the film on inhibiting the take-off of the particles. According to the test method for exploring the inhibition effect of the covering film on the GIL metal particles, the inhibition effect of the covering film on the metal particles in different shapes is observed and compared through tests, and a basis is provided for practical application of the covering film.

The invention provides a solar cell, and belongs to the technical field of solar cells. The solar cell comprises a cell body which is provided with a suede structure and a polished surface structure, and the suede structure and the polished surface structure are located on the same or different surfaces of the cell body; the electrode structure comprises a first electrode and a second electrode, the first electrode is in contact with the suede structure, the second electrode is in contact with the polished surface structure, and the first electrode and the second electrode respectively comprise spherical metal particles and flaky metal particles; wherein the proportion of the spherical metal particles located in the contact area of the first electrode and the suede structure is larger than that of the spherical metal particles located in the contact area of the second electrode and the suede structure. The contact capability of the electrode and the suede is improved, and the matching of the contact resistance of the suede and the polished surface is realized, so that the photoelectric conversion efficiency and the stability of the solar cell are improved.