71results about How to "Reduce large particles" patented technology

The invention discloses a cathode material of a lithium ion battery, a preparation method of the cathode, and the lithium ion battery using the cathode material, belonging to the technical field of energy material. According to the invention, a chemical dispersant is added into the cathode of an aqueous lithium-ion battery, thereby solving problems of uniform dispersion for active materials of positive electrode and a nano-carbon mixed conductive agent; and a mechanical dispersion method is combined, preferably with a revolution speed of the mechanical dispersion being 15-35 HZ and a rotation speed being 10-30 HZ, thereby realizing uniform dispersion of the nano-active substances in a relatively short time. The cathode material of a lithium ion battery and the preparation method provide technical approach for solving uniform dispersion of the aqueous nano-active substances, and are high in production efficiency and low in cost; the prepared battery is high in discharge capacity, and is significantly improved in low temperature, multiplying power and cycling performances; and a new approach is provided for a large scale application of the nanometer lithium batteries which are limited to a high cost and a high-polluting oil system in the field.

The invention provides a preparation method for a high-purity high-density MAX phase coating. According to the method, an arc ion plating technology is combined with a magnetron sputtering technology,an M-position element is provided for the arc, an A-position Al element is provided for magnetron, nitrogen or hydrocarbon as reaction gas is introduced for deposition, then thermal treatment is adopted, and the high-purity high-density MAX phase coating is prepared. The prepared MAX phase coating is high in purity, good in compactness, free of a microdefect, high in preparation efficiency, low in cost and capable of overcoming the defects that large particles on the surface of a MAX phase coating prepared through a single arc method are excessive, the density is low, the efficiency is low bymeans of a magnetron sputtering method, and the defects are obvious and has the wide application prospects on the aspects of high-temperature protection, corrosion-resistant application and the like,and the industrial production of the MAX phase coating can be achieved easily.

The invention discloses a TiAlN/W2N multi-layer coating with high hardness and high corrosion resistance and a preparation method thereof. The TiAlN/W2N multi-layer coating is characterized in that amode of successive sputtering of multiple targets is utilized to deposit a TiN transition layer and alternatively sputtering and depositing TiAlN layers and W2N layers on a matrix, the two layers close to the matrix are the TiN transition layer and the TiAlN layer in sequence, and the uppermost layer is the W2N layer. The total thickness of the TiAlN/W2N multi-layer coating is 2.5-3.5mu m, the thickness of each TiAlN layer is 50-210nm, the thickness of each W2N coating is 40-160nm, and the total number of periodic layers is 10-50. The preparation method comprises the steps of: cleaning the matrix, depositing the TiN transition layer and alternatively sputtering and depositing the TiAlN layer and the W2N layer. The TiAlN/W2N multi-layer coating is high in hardness and good in wear resistance, the thickness of single layer is easy in control and large in controllable range, and the process is simple.

The invention discloses a method and device for repairing a TiN/DLC/TiN nano composite film which is excellent in bonding force and high in sand erosion resistance on the surface of a blade of an engine. The method for preparing the TiN/DLC/TiN nano composite film comprises the steps that a metal 'pinning layer' which can improve the bonding force of a film base is injected into the surface of the blade through a metal vapor vacuum arc (MEVVA) ion source method; deposition is conducted on the metal 'pinning layer' through a magnetic filtered cathodic vacuum arc (FCVA) deposition method, so that a first metal/metal oxide film transition layer used for releasing the internal stress is obtained; deposition is conducted on the first transition layer through the magnetic FCVA deposition method, so that a second soft DLC layer is obtained; deposition is conducted on the second soft layer, so that a third superhard TiN film is obtained; and the second layer and the third layer are prepared by repeatedly conducting the process till the overall thickness of the TiN/DLC/TiN nano composite film is 10-30 micrometers. By the adoption of the method and device, the TiN/DLC/TiN nano composite film is deposited on the blade of the engine, so that the blade of the engine is well protected, and the situation that the blade of the engine is damaged due to sand erosion is prevented.

The invention discloses a manufacturing method and equipment for a conductive layer in a novel electronic cigarette atomizer device based on the ion beam technology. The preparation method for preparing the conductive layer in the electronic cigarette atomizing device comprises the following steps of: taking porous aluminum nitride ceramic as a basal body, adopting a magnetic filter metal cathode vacuum arc (FCVA) technology, depositing a first metal nitride conductive layer on the surface of the basal body, and depositing on the first layer by adopting the FCVA process to obtain a second metal layer; and depositing on the second metal layer by adopting the FCVA depositing method to obtain a third conductive metal nitride layer, wherein the total thickness of the three layers of composite films is 1-10 microns, and the resistance is 1-10 ohms. According to the manufacturing method and the equipment, the novel electronic cigarette atomizer device with a long service life can be manufactured.

The invention discloses a method for prolonging the service life of a diamond grinding wheel rod of polished optical glass based on the ion beam technology. According to the method, an ultra-thick and ultra-hard (AlTi)1-xNx/AlTiCN/TiAl/(ZrAl)1-xNx composite film which is high in friction coefficient and good in toughness is deposited on the surface of silicon carbide through an ion implantation technique and a magnetic filtration deposition technique. A method for preparing the (AlTi)1-xNx/AlTiCN/TiAl/(ZrAl)1-xNx composite film comprises the steps that a metal cathode filtered cathodic vacuum arc (FCVA) system is adopted, and a workpiece is cleaned on the surface of the grinding wheel rod through high-energy large-beam metal ion beams; then a metal vacuum vapor ion source (MEVVA) method is adopted, and a metal "pinning layer" capable of improving the film-base combination force is injected into the surface of the workpiece; sine or cosine modulated deposition is conducted on the gas inlet amount on the metal"pinning layer" through a magnetic filtration filtered cathodic vacuum arc (FCVA) method, and the ultra-hard thick (AlTi)1-xNx/AlTiCN/TiAl/(ZrAl)1-xNx composite film which is good in toughness is obtained; and the modulation period is repeated till the total thickness of the (AlTi)1-xNx/AlTiCN/TiAl/(ZrAl)1-xNx composite film reaches 10-30 microns. By the adoption of the method, the (AlTi)1-xNx/AlTiCN/TiAl/(ZrAl)1-xNx composite film deposited on the workpiece is good in toughness and quite high in microhardness, and the service life of the grinding wheel rod can be prolonged by 2-5 times.

The invention discloses a preparation method and equipment of a patterned electrostatic chuck. The preparation method comprises the following steps that an ultra-large size (greater than 300 mm) ceramic sheet (AlN or Al2O3) is selected as a substrate, a patterned organic adhesive mask is printed on the substrate, and a high resistivity, high hardness, wear resistance and ion erosion resistance DLCfilm layer is deposited by utilizing an ion beam technology; a deposition method comprises the following steps that a high-energy metal vacuum vapor ion source (MEVVA ) is adopted, a metal element isinjected into the substrate to form a graded pseudo diffusion layer, and then a 90-degree ultra-wide magnetic filtration metal cathode vacuum arc (FCVA) technology is adopted, and a metal transitionlayer is deposited; a single T-shaped magnetic filtration cathode vacuum arc (FCVA) is adopted on the metal transition layer, and a DLC film layer with high sp2 content is obtained through the deposition; and a double-T-shaped magnetic filtration cathode vacuum arc (FCVA) is utilized on the DLC film layer with the high-sp2-content, and a super-hard DLC film layer is obtained through the deposition; and the resistance of the film layer can reach 10-50 megohm, and the hardness can reach 80 Gpa or above. According to the method and the equipment, the electrostatic chuck is enabled to have excellent wear resistance, and the service life is prolonged.

The invention provides a TiAl (Nb, Si, C) N-containing nanocrystalline amorphous composite coating, a preparation method thereof and a cutter. The composite coating is a nanocrystalline amorphous TiAl(Nb, Si, C) N coating formed by physical vapor deposition. The TiAlN composite coating with a hardening and wear-resistant Si element, a toughening Nb element and an antifriction C element co-doped in an optimal proportion maintains the characteristics of excellent comprehensive performance and no short plate and good 'wooden barrel effect' of a TiAlN-based coating, meanwhile, the adhesive force,wear resistance and high-temperature stability of the coating can be greatly improved, and the integration of toughness and wear resistance of the coating is realized. The preparation method is simple in process, easy to operate in actual production, low in production cost and suitable for large-scale popularization.

The invention relates to a piston with a Ti-doping diamond multi-layer thick heat-insulating film on the top face and a preparation method and application of the piston. The piston comprises a piston substrate, a transitional layer, n layers of TiC/DLC film layers and m buffer layers, wherein the outermost layer of the top face of the piston is the last TiC/DLC film layer. According to the preparation method of the piston, the transitional layer is prepared on the top face of the piston substrate; then the first TiC/DLC film layer is prepared; one buffer layer is formed on the first TiC/DLC film layer; the TiC/DLC film layers and the buffer layers are formed alternately, so that a middle layer is obtained, and then the last TiC/DLC film layer is prepared. According to the piston with the Ti-doping diamond multi-layer thick heat-insulating film on the top face has excellent abrasion resistance and thermal impact resistance and can meet the requirement of modern engines for high efficiency and low emission.

The invention discloses a compact cadmium sulfide thin film preparation device. The compact cadmium sulfide thin film preparation device comprises a water tank, a magnetic stirrer and an ultrasonic generator which are sequentially arranged from top to bottom, wherein the water tank contains water and is internally provided with a reaction vessel, the reaction vessel is internally provided with at least one substrate and a magnon and contains a reaction solution, and meanwhile, at least one ultrasonic vibrator is arranged at the bottom of the water tank, or an ultrasonic vibrating plate is arranged in the water tank; the magnetic stirrer is arranged at the bottom of the water tank and is used for controlling the temperature of the reaction solution and the rotating speed of the magnon; and the ultrasonic generator is arranged below the magnetic stirrer. The compact cadmium sulfide thin film preparation device has the advantages that the compact cadmium sulfide thin film preparation device is simple in operation, high in finished product quality, low in cost and high in stability, can realize uniform and sufficient stirring of the reaction solution in chemical bath deposition, can also reduce the adhesion of large particles and clusters and is conductive to the growth of uniform compact large-sized cadmium sulfide thin films.

The invention discloses a preparation process of a high-concentration paraffin emulsion, and relates to the related technical field of paraffin emulsion processing. The preparation process comprises the following steps: 1, material preparing; 2, heating and stirring; 3, emulsifying; 4, cooling; and 5, filtering. According to the invention, through a series of steps, the quality of the paraffin solution can be improved, and the processing efficiency of the paraffin solution can be improved; through the homogenizer, the mixing uniformity degree can be improved, and large particles in the paraffin solution can be reduced, so that the quality of the paraffin solution can be improved; the emulsifying efficiency of the paraffin solution can be improved through the reaction kettle so as to improve the production efficiency of the paraffin solution; the reaction barrel can be sealed through the sealing cover, so that the heat loss in the reaction barrel can be prevented so as to improve the emulsifying efficiency of the paraffin solution; the interior of the reaction barrel can be kept at a constant temperature through the heating plate; and the rapid stirring can be achieved through the motor, the transmission rod, the rotating plate and the stirring roller.

The invention relates to a method for improving the anti-friction and anti-wear performance of an impactor piston. The method specifically comprises the steps that carburization treatment is conductedfirstly, and sulphurizing treatment is conducted after that. 20CR2Ni steel is accurately ground and polished, and then the surface of the steel is subjected to carburization treatment and low temperature ionic sulphurizing treatment in sequence. The obtained composite sulphurized layer surface is composed of tiny and compact spherical sulfide, and conglobated large particles of the sulfide are fewer. The composite sulphruized layer has good anti-friction performance under the mediate load, and when the load is too low or too high, the friction coefficient of the composite sulphurized layer issomewhat increased on the contrary. The carburized-sulphurized composite layer with a solid lubricating effect is prepared on the surface of a 20Cr2Ni4 steel impactor piston carburized layer, the service life of a piston is effectively prolonged, the working time of an impactor is prolonged, and the quality of an impactor product is improved greatly.

The invention discloses a device for preparing a high-shielding substrate coating, and relates to the technical field of coating devices. The device for preparing the high-shielding substrate coatingmainly comprises a vacuum chamber, a first flange hole is formed in the rear side of the middle of the vacuum chamber in the horizontal direction, and a to-be-machined workpiece enters the vacuum chamber through the first flange hole; the vacuum chamber also communicates with a gas ion source system, a deposition system and a molecular pump; the vacuum chamber is provided with an air inlet; surface gas ion source cleaning is performed on the to-be-machined workpiece through the gas ion source system; nitrogen is introduced to carry out surface nitridation, the fatigue resistance of a substrateis improved, and preparation of a circulating multilayer coating is performed; and the workpiece is rotated in the vacuum chamber. Each layer in the unit coating is a mixture of nitride and oxide nanocrystals, so that the internal stress generated during deposition can be released, and oxides of Al and Cr in the coating have good high-temperature resistance at the same time.

The invention relates to a Cr/CrNx heat insulating film for the top surface of an aluminium alloy piston and a preparation method of the Cr/CrNx heat insulating film. The Cr/CrNx heat insulating filmis formed by a pure metal Cr layer attached to the top surface of the aluminium alloy piston and a CrNx layer coating the pure metal Cr layer uniformly. The preparation method of the Cr/CrNx heat insulating film comprises the following steps: firstly, the cleaned and dried aluminium alloy piston is placed in an FCVA (filtered cathodic vacuum arc) deposition system, a magnetic filtered Ti power arcis switched on, and the pure metal Cr layer is deposited with a pure metal Cr target as a cathode; the aluminium alloy piston with the pure metal Cr layer on the top surface is obtained; then the pure metal Cr target is taken as the cathode, nitrogen is taken as working gas, the nitrogen introducing amount is regulated, and the CrNx layer is generated on the pure metal Cr layer of the aluminium alloy piston with the pure metal Cr layer on the top surface. The strength, the wear resistance and the heat insulation performance of the obtained product are all better than those of the existing products, requirements of modern engines for high power and low emission can be met, and large-scale industrial application is facilitated.

The invention provides a method for preparing zirconium pipe coating of a light-water reactor. The method mainly comprises the following steps that a CrAbSi circulating nano coating and a MoNbZr circulating nano coating are alternately deposited by utilizing a high-power pulse technology and a magnetic filtration deposition technology, the thickness of the CrAbSi circulating nano coating and the MoNbZr circulating nano coating in a unit period is 0-15 nanometers, and the total thickness of the coating is 0-15 micrometres. After the nano coatings are deposited alternately, the oxidation resistance of the zirconium pipe at high temperature and high pressure in a high-pressure kettle is obviously enhanced, by implementing the method, a nano-circulation composite structure (especially the elements of Al, Cr and Si are added) is deposited alternately on the zirconium pipe, so that the inward diffusion of an oxygen element at the high temperature can be very well prevented, due to the mutualsynergistic effect of various elements, falling off, cracking and diffusion behaviors of oxygen atoms of a film layer can be effectively prevented in the high temperature and high pressure, and the safety and reliability of a fault-tolerant fuel are improved.

The invention relates to a preparation method for a super-thick energy absorption coating layer. The preparation method comprises the steps that S01, a substrate is subjected to gas ion source cleaning; S02, the substrate is subjected to high-power pulse metal ion cleaning; S03, acetylene and nitrogen are injected for CrAlNC deposition; S04, an acetylene valve is closed, and ZrN is deposited through high-power pulse magnetic control; S05, the nitrogen is stopped, and the acetylene is injected for CrAlC deposition; and S06, a film layer is circularly deposited till the thickness of the film layer is larger than 20 [mu]m. According to the preparation method provided by the embodiment of the invention, through the mode of combining a gas ion source technology and a high-power pulse magnetic control technology with a multi-arc ion plating technology, the deposited super-thick coating layer is small in internal stress and good in toughness, impact resistance and energy absorption performance. The preparation method is simple, easy to implement, low in cost and high in efficiency, and then is quite suitable for batch production.