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640results about How to "Fast deposition" patented technology

Diamond wire saw production method of surface modified diamond

InactiveCN101812710AAchieve electroplating depositionEasy to operateElectrophoretic coatingsElectrophoresisDiamond wire saw
The invention relates to a diamond wire saw production method of a surface modified diamond, which comprises the following steps: 1. removing surface grease and surface metal oxides on the surface of the diamond; 2. placing diamond micropowder into a cationic surfactant solution, applying positive potential and forming a layer of positive charge film on the surface of the diamond under the electrophoretic action by action of a cationic surfactant; and 3. carrying out composite electroplating of a diamond wire saw. In the invention, conductive processing is carried out on the diamond, so that diamond grains can orderly move in a plating solution under the action of an electric field to realize the electroplating deposition on the surface of a metal wire without the influence of the size of the diamond grains; the surfactant is adsorbed on the surface of the diamond, so that a plating layer and the diamond present an infiltrative type interface, and a Ni plating layer has strong holding capability on the diamond; and the diamond micropowder has high utilization ratio. The invention has simple process method and convenient operation, the diamond grains have rapid deposition speed, good deposition uniformity and high deposition density on the metal wire, an electroplating layer has high holding force on the diamond grains, and the diamond micropowder has high utilization ratio. The invention can realize industrialized production and provides a method for efficiently and rapidly producing the diamond wire saw.
Owner:CHANGSHA DIAT NEW MATERIAL SCI & TECH

Method adopting trichlorosilane and dichlorosilane mixed raw materials to produce polycrystalline silicon

The invention discloses a method adopting trichlorosilane and dichlorosilane mixed raw materials to produce polycrystalline silicon. After trichlorosilane produced by hydrogenation of silicon tetrachloride or purchased outside is rectified and purified, the rectified and purified trichlorosilane is mixed with recycled trichlorosilane and dichlorosilane mixed materials, the volume percent of dichlorosilane in the mixed raw materials is controlled to be between 3% and 15%, preferably between 5% and 10%, then impurity removal by adsorption and vaporization operation are performed, vaporized chlorosilane mixed gas and high-purity hydrogen are mixed according to mole ratio of 1:2 to 1:10, preferably 1:4 to 1:6, and finally the vaporized chlorosilane mixed gas and the high-purity hydrogen enter into a reduction furnace to produce the polycrystalline silicon. After reactions, tail gas undergoes low-temperature condensation recycle, chlorosilane obtained by recycle is sent to a rectification process to perform separation of silicon tetrachloride and impurities, and the trichlorosilane and dichlorosilane mixed raw materials are obtained. The method makes full use of byproduct dichlorosilane in the polycrystalline silicon production process to improve sedimentation velocity of silicon and reduce power consumption and material consumption, simultaneously can reduce treatment cost and loss of silicon, and improves trichlorosilane utilization rate.
Owner:雅安永旺硅业有限公司

Preparation method of electroplating diamond fret saw

The invention relates to a preparation method of an electroplating diamond fret saw, comprising the following technological processes: 1. roughening processing is carried out to micrometer diamond particles in advance, nanometer diamond powder is added in cationic surface active agents according to the proportion of 1 : 3 by mass ratio, so as to prepare uniform and stable nanometer diamond powder suspending liquid, plating solution is arranged in an electroplating tank, after the weighted nanometer diamond powder suspending liquid is mixed with the micrometer diamond particles according to the proportion of 1 : 3 by mass ratio, and then the mixture is added in the plating solution, the plating solution is circulated continuously, and nickel aminosulfonate is main material in the plating liquid, and boracic acid and nickel chloride are additionally added, and a magnetic stirring device is arranged in the electroplating tank; 2. a steel wire continuously and uniformly passes through the electroplating tank, under the action of electrical current, nickel ions move to cathode from anode, so as to drive the nanometer diamond powder and the micrometer diamond particles to move to the steel wire, so as to lead the steel wire to be plated with the nanometer diamond powder and the micrometer diamond particles, meanwhile, chemical nickel-plating is carried out to the steel wire; 3. after the steel wire is separated from the electroplating tank, wires are wound up after being cleaned and dried. The method can continuously and quickly produce electroplating diamond fret saw, and the production efficiency is high.
Owner:JIANGSU FUNLIN SUPER HARD TOOLS

Laser-reinforced jet-electrodeposition rapid-prototyping processing apparatus and method

The invention discloses a laser-reinforced jet-electrodeposition rapid-prototyping processing apparatus and method. An anode is connected with a laser generation mechanism, an eye shield is located between the laser generation mechanism and the anode, a cathode is a deposition substrate which is arranged in a deposition groove, and a power supply is connected with the cathode and the anode; a Z-axis mobile platform is connected with the anode and the laser generation mechanism, and an X-axis mobile platform and a Y-axis mobile platform are successively arranged below the deposition groove; the liquid inlet end of a constant temperature liquid storage mechanism is connected with the anode, the liquid returning end of the constant temperature liquid storage mechanism is connected with the deposition groove, and a controller is connected with the laser generation mechanism, the power supply, the X-axis mobile platform, the Y-axis mobile platform, the Z-axis mobile platform and the constant temperature liquid storage mechanism. According to the invention, a high-energy density laser beam and a high-speed electrodeposition solution are synchronously jetted to the surface of the cathode through a tubular passive anode centre bore, combination of laser reinforced electrodeposition technology and electrodeposition solution injection is realized, and a high deposition speed is obtained.
Owner:TONGLING UNIV

Bipolar plate of fuel cell and method for preparing carbon titanium nanocomposite film on surface thereof

The invention discloses a bipolar plate of a fuel cell and a method for preparing a carbon titanium nanocomposite film on the surface thereof, belongs to the technical field of surface modification of metallic materials and fuel cells, and relates to a bipolar plate of a regenerative fuel cell and a proton exchange membrane fuel cell and a preparation technology of a surface modified film of the bipolar plate. The bipolar plate consists of a metal thin plate substrate and carbon titanium nanocomposite films which are formed on the surfaces at two sides of the substrate, wherein the metal thin plate substrate is a titanium plate and a stainless steel plate; the carbon titanium nanocomposite film is an amorphous and nanocrystalline composite film which is prepared on an amorphous carbon substrate with an arc ion film plating method and on which titanium and titanium carbide nanocrystals are distributed; the thickness of the film is of micron dimension; and the size of the crystal grains of the nanocrystals is of micron dimension. The invention has the effects and advantages that: the bipolar plate is low in manufacturing cost, has prominent composite performance such as corrosion resistance, conductivity, hydrophobicity and the like, can be used for replacing a noble metal bipolar plate and a graphite bipolar plate, and can be used as a cell bipolar plate of the proton exchange membrane fuel cell and an electrolytic cell bipolar plate of the regenerative fuel cell.
Owner:DALIAN UNIV OF TECH

Platinum-group metal coating on surface of refractory metal and preparation method thereof

The invention provides a platinum-group metal coating 30 for refractory metal 10; a 0.2 to 2mu m transition layer 20 is arranged between the platinum-group metal coating 30 and the refractory metal base material 10; in the transition layer 20, from one side of the base material of the refractory metal 10 to one side of the platinum-group metal coating 30, the platinum-group metal elements are sequentially increased until the transition layer 20 ends, the content of the platinum-group metal elements reaches 100 percent, and the thickness of the platinum-group metal coating 30 is within 100mu m. The invention provides a method of preparing the platinum-group metal coating 30 on the surface of the refractory metal 10. The method is carried out in a vacuum furnace, uses platinum-group metal as a target, the target voltage is between 0 and -1200V, the refractory metal serves as the base material, and the voltage is between 0 and -900V. Argon serves as the working atmosphere, when the vacuum indoor pressure reaches 15 to 55Pa, a DC power supply is connected, and finally the platinum-group metal coating with preferred growth orientation is finally formed through continuous sputtering and anti-sputtering, absorption and desorption.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Method for preparing anti-oxidation permeated layer on surface of molybdenum or molybdenum alloy

The invention discloses a method for preparing an anti-oxidation permeated layer on the surface of molybdenum or a molybdenum alloy. The method comprises the following steps: I, polishing the surface of molybdenum or the molybdenum alloy so as to remove oxidized skin on the surface, performing ultrasonic washing, and drying; II, preparing a coating permeation agent; and III, coating molybdenum or the molybdenum alloy into a crucible with the permeation agent, sealing the crucible and putting the crucible into a high-temperature furnace, performing heat-preservation treatment for 1-20 hours at 1000-1500 DEG C in the presence of argon, and performing furnace cooling till the room temperature, thereby obtaining the anti-oxidation permeated layer on the surface of molybdenum or the molybdenum alloy. As the high-temperature furnace is adopted to perform heat-preservation treatment on molybdenum or the molybdenum alloy coated in the permeation agent, the anti-oxidation permeated layer of a multi-layer structure can be formed on the surface of molybdenum or the molybdenum alloy, and the anti-oxidation permeated layer is high in adaptability to the shape of a molybdenum or molybdenum alloy substrate, uniform in thickness of permeated layer, slow in degradation speed of the permeated layer, and has the advantages of simplicity in operation and rapid permeated layer deposition speed.
Owner:CHANGAN UNIV

Lithium ion battery and manufacturing method thereof

ActiveCN103928704AGood high temperature storage performanceExcellent high temperature cycle performanceFinal product manufactureSecondary cellsHigh temperature storageElectrical battery
The invention provides a lithium ion battery. The lithium ion battery comprises a sealed packaging piece, and an electrode set and electrolyte which are arranged in the sealed packaging piece, wherein the electrode set comprises an anode piece, a cathode piece and a separation membrane arranged between the anode piece and the cathode piece; the lithium ion battery further comprises nano protection layers; the nano protection layers are arranged on the surface of the anode piece, the surface of the cathode piece and the surface of the separation membrane of the lithium ion battery; the thickness of each nano protection layer is 0.2-10nm. According to the lithium ion battery, a plasma enhanced type atom layer deposition layer is used for putting a wound battery core into a reaction cavity; meanwhile, the nano protection layers are uniformly plated on the surface of the anode piece, the surface of the cathode piece and the surface of the separation membrane, so that the lithium ion battery has excellent high-temperature storage performance, high-temperature cycle performance and safety performance; the lithium ion battery has the advantages of simple preparation method, low reaction temperature, small energy consumption, controllable thickness, wide reaction precursors, rapid deposition speed and capability of being produced in a large batch.
Owner:安普瑞斯(无锡)有限公司
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