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83results about How to "The production process is simple and reliable" patented technology

Preparation method and application of silicon/nitrogen-doped graphene composite material for lithium ion battery

Preparation method and application of a silicon / nitrogen-doped graphene composite material for a lithium ion battery belongs to preparation method and application of a silicon / nitrogen-doped graphenecomposite material. According to the preparation method of the silicon / nitrogen-doped graphene composite material, commercial silicon powder, a carbon source and a nitrogen source are mixed and subjected to wet ball-milling, a high-temperature solid-phase sintering synthesis technology is employed under an inert atmosphere after drying, a technical parameter during the reaction process is controlled, silicon content control of the silicon / nitrogen-doped graphene composite material is achieved, and the silicon / nitrogen-doped graphene composite material is obtained and is used for fabricating alithium ion battery negative electrode. The preparation method has the advantages that the material shows excellent cycle and rate performance when used as a lithium ion battery negative electrode, issimple and reliable in production process, available in raw material, low in equipment requirement, simple in synthesis circuit and high in operation step controllability and is convenient to control, large-scale quantitative preparation is easily achieved, and the integral electrochemical performance is greatly improved by the composite material.
Owner:CHINA UNIV OF MINING & TECH

Centrifugal casting method for composite ring with Q345B steel inner layer and 40Cr steel outer layer

The invention provides a centrifugal casting method for a composite ring with a Q345B steel inner layer and a 40Cr steel outer layer, and belongs to the field of casting of ring-shaped parts. The centrifugal casting method is characterized by comprising the following process steps that (1) inner layer Q345B steel and outer layer 40Cr steel of the composite ring are smelted in different furnaces at the same time, the tapping temperature of the inner layer Q345B steel is 1650-1680 DEG C, and the tapping temperature of the outer layer 40Cr steel is 1600-1630 DEG C; (2) the preheating temperature of a casting mold ranges from 150 DEG C to 180 DEG C, and the preheating temperature of a casting ladle and the preheating temperature of a pouring gate range from 250 DEG C to 300 DEG C; (3) the outer layer is cast with the temperature ranging from 1520 DEG C to 1530 DEG C, and the casting speed is 24.5-25.5 kg / s; (4) the inner layer is cast with the temperature ranging from 1550 DEG C to 1570 DEG C, and the time interval between casting of the outer layer and casting of the inner layer is 27-29 s; and (5) mold stripping is carried out after cooling, then slow cooling is carried out, and the mold stripping temperature ranges from 1000 DEG C to 1050 DEG C. The centrifugal casting method has the advantages that the inner layer and the outer layer are completely melted and combined, and gaps in an interface are avoided; the combination strength is high, stress of the composite ring can be evenly distributed, and the wear resistance of the composite ring is improved; the production process is simple and reliable.
Owner:定州市金华蓝天汽车零部件有限公司 +1

Pipe fitting with zinc plated at outer part and plastic coated at inner part as well as production process of same

The invention relates to a pipe fitting with zinc plated at the outer part and plastic coated at the inner part as well as a production process of the same. In order to overcome defects in the prior art, the invention provides the pipe fitting with the zinc plated at the outer part and the plastic coated at the inner part as well as the production process of the same. The technical scheme is that: the pipe fitting with the zinc plated at the outer part and the plastic coated at the inner part comprises a galvanized layer (1) and malleable steel piece base body (2), and also comprises a polyethylene or epoxy/polyester coating layer (3). The production process of the pipe fitting with the zinc plated at the outer part and the plastic coated at the inner part comprises the following steps of: blasting sand on an inner wall of a galvanized pipe fitting, deoiling the galvanized pipe fitting in a neutral environment, cleaning the galvanized pipe fitting by using hot water once, cleaning the galvanized pipe fitting by using hot water for the second time, preheating the galvanized pipe fitting, providing the galvanized pipe fitting with a facing, powdering the galvanized pipe fitting, removing the facing of the galvanized pipe fitting, curing, leveling and inspecting the galvanized pipe fitting, removing rust in screw threads of the galvanized pipe fitting, packaging the galvanized pipe fitting, and putting the galvanized pipe fitting in storage. The plastic coating process provided by the invention has the advantages of simplicity in operation, high production efficiency, high adhesion force, no easiness for the separation of layers and stability in product quality as the inner wall of the galvanized pipe is subjected to phosphating and sand blasting treatment.
Owner:ZHONGSHAN LESSO WALTON COATING STEEL PLASTIC PIPECO LTD

Method for quickly preparing rapid-charging graphene-based positive electrode material

The invention discloses a method for quickly preparing a rapid-charging graphene-based positive electrode material. The method includes the steps of preparing a lithium iron phosphate precursor solution with specific concentration from iron nitrate nonahydrate as an iron source, lithium dihydrogen phosphate as a phosphorus source and a lithium source and citric acid monohydrate as a carbon source,adding a proper quantity of graphene oxide solution with ultrasonic operation and stirring sufficiently to ensure that graphene is dispersed in the solution evenly, adding the prepared solution intoa liquid storage tank, and subjecting the prepared solution to spray pyrolysis in the reduced atmosphere so as to obtain a black powder product. The method has the advantages that compared with traditional solid-phase mixing, the graphene is mixed with raw materials in the solution state, and even dispersion and coating of the graphene on an active material can be achieved to guarantee stability and uniformity of the black powder product; the black powder product is synthesized by one-step spray pyrolysis, and accordingly the method is simple and reliable in production technology, uniform in product stability, low in energy consumption, environment friendly and suitable for large-scale industrial production.
Owner:NANCHANG HANGKONG UNIVERSITY

Wheel hub motor and position signal processing method thereof

The invention discloses a wheel hub motor. The wheel hub motor comprises a motor shaft, a stator, a rotor and a position detection device; the position detection device comprises a PCB (printed circuit board) and a magnetic ring; the PCB is provided with a plurality of magnetic induction components; when the magnetic ring is stationary or rotating, the magnetic induction components can sense the change of the magnetic flux of the magnetic ring; the rotor is provided with a left end cover and a right end cover which is used for installing a brake assembly; and the position detection device is arranged inside the right end cover. The invention also discloses an externally-arranged wheel hub motor; the rotor of the external wheel hub motor is provided with a left end cover and a right end cover which is used for installing a brake assembly; a motor shaft at the external side of the left end cover is provided with a housing; and a position detection device is arranged in the housing. The invention also discloses a position signal processing method of the wheel hub motor. The wheel hub motor of the invention has the advantages of simple structure, simple and reliable production process, reliable vibration resistance, low performance requirements for a controller and high accuracy. According to the wheel hub motor, position feedback avoids a heat source, mechanical angle and electrical angle output selections are provided, and the requirements of different control interfaces can be satisfied.
Owner:NINGBO BRANCH OF JIANGSU YADEA TECHNICAL DEV CO LTD +1

Preparation method of decellularized derma matrix of human source

The invention discloses a preparation method of a decellularized derma matrix of a human source. The preparation method specifically comprises the following steps: taking stored human source skin; eliminating subcutaneous attached fat ingredients; cleaning and disinfecting by using iodine and ethyl alcohol, after that, repeatedly soaking and washing the skin by using a hypotonic solution; treatingby using a Dispase II solution overnight; removing epidermis, and after that, washing by using normal saline, thus acquiring derma; treating by using a hypertonic saline solution; washing by using the normal saline; treating by using a decellularizion solution in a dialysis device, thus acquiring the decellularized derma matrix; washing by using the normal saline, to obtain the decellularized derma matrix of the human source. The preparation method is simple and convenient, adopts a simple and reliable production process, is capable of improving production efficiency, reducing production cost, and reducing environment pollution in the greatest degree; in addition, the obtained decellularized derma matrix reserves a skin basement membrane, and is beneficial to adhesion and multiplication of cells; at the same time, the decellularized derma contains abundant growth factors, so the decellularized derma matrix has good biocompatibility, and is more beneficial to supporting growth of the cells.
Owner:上海仁康科技有限公司

Production technology of sponge iron for water purifying agent

The invention relates to a production technology of sponge iron for a water purifying agent. The production technology comprises steps as follows: (1), a dried and finely ground iron-containing raw material is mixed uniformly with a carbonaceous material, a pore-forming auxiliary and binder components, and a mixture is pressed into balls; (2), green balls are dried and mixed uniformly with a reducing agent and a desulfurizing agent, preheating, reducing and cooling are performed in a coal shaft furnace, and a sponge iron mixture is obtained; (3), after the sponge iron mixture is subjected to magnetic separating, sponge iron metallized pellets and residual coal are obtained; sponge iron particles obtained after crushing and screening of the sponge iron metallized pellets are used as the water purifying agent. The production technology has the remarkable advantages of being advanced, reliable, stable in product quality, low in production cost, high in production efficiency and environmentally friendly, and large-scale production can be realized; the produced sponge iron water purifying agent has the advantages of large specific surface area, high specific surface energy, higher electrochemical enrichment, physical absorption and flocculation precipitation and the like, and can be widely used for treating various kinds of wastewater with difficulty in biochemical degradation.
Owner:WUHAN COSRED SCI & TECH LTD
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