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2179results about How to "Good coating effect" patented technology

Composite material of nitrogen-doped porous carbon-wrapped carbon nano tube as well as preparation method and application of material

The invention relates to a composite material of a nitrogen-doped porous carbon-wrapped carbon nano tube as well as a preparation method and an application of the composite material. The preparation method comprises the following steps: dispersing the carbon nano tube in water, adding a carbon source to obtain a reaction system, subsequently performing hydrothermal reaction, performing thermal treatment on the carbon nano tube wrapped with a carbon layer on the surface, and a nitrogen source at the high temperature so as to obtain the composite material of the nitrogen-doped porous carbon-wrapped carbon nano tube. According to the preparation method, the carbon source is polymerized under a hydrothermal reaction condition so as to obtain the carbon layer, the outer surface of the carbon nano tube is wrapped with the carbon layer, subsequently the carbon layer is carbonized and decomposed to generate a porous structure under high temperature treatment, and at the same time, the gasified nitrogen source is diffused to the carbon layer through ducts to be subjected to in-situ doping. The composite material provided by the invention can be used as a cathode oxidation reduction catalyst of a fuel battery, is excellent in catalysis, and is high in oxidation activity when being compared with other nitrogen-doped materials reported in documents. The preparation method provided by the invention is simple and economic in process, convenient to operate and easy to achieve the large-scale production.
Owner:INST OF CHEM CHINESE ACAD OF SCI

800MPa-grade cold-rolled hot-galvanizing dual-phase steel and production method thereof

The invention discloses 800MPa-grade cold-rolled hot-galvanizing dual-phase steel. The 800MPa-grade cold-rolled hot-galvanizing dual-phase steel comprises the following raw materials taken as chemicalcomponents in percentage by mass (%): 0.05% to 0.10% of C, 1.60% to 2.30% of Mn, 0.010 to 1.0% of Als, 0.10% to 0.60% of Si, 0.010 to 0.050% of Nb, 0.05 to 0.30% of Cr, 0.05 to 0.30% of Mo, P not smaller than 0.015%, S not greater than 0.010%, N not greater than 0.008%, and the balance of Fe and inevitable impurities, and noble metal elements Cr and Mo satisfy the relation that Cr+Mo is not smaller than 0.05 and not greater than 0.30, and C+Si/30+Mn/20 is not greater than 0.22. The production method for the hot-galvanizing steel for an automobile wheel cover comprises the steps of smelting, continuous casting, heating, hot rolling, cooling, coiling, pickling, cold rolling, annealing and coat-plating. According to the invention, the obtained cold-rolled hot-galvanizing dual-phase steel hasless precious alloying elements, so that the product has good mechanical properties, surface quality, formability and welding performances. Furthermore, the 800MPa-grade cold-rolled hot-galvanizing dual-phase steel disclosed by the invention can be produced on the existing conventional production line without additional equipments.
Owner:武汉钢铁有限公司

Chromium-free self-lubricating passivation solution and preparation method thereof

The invention discloses a chromium-free self-lubricating passivation solution and a preparation method thereof. The chromium-free self-lubricating passivation solution is formed by compounding the following compositions in percentage by weight: 8%-12% of water-borne epoxy resin, 0.5%-1% of curing agent, 10%-15% of silane coupling agent, 0.5%-1% of inorganic component, 2%-4% of solid lubricant, 1%-2% of friction modifier, 0.5%-1% of anti-wear agent, 0.5%-1% of anti-sinking agent, and 60%-75% of diluting agent. The inorganic component is one or a combination of Ce(NO3)3 and sodium molybdate, the solid lubricant is one or a combination of two or more of polytetrafluoroethylene, polyethylene wax, polyethylene, molybdenum disulfide and graphite, the friction modifier is self-synthesized molybdenum dialkyldithiophosphate, the anti-wear agent is one or a combination of nanosilicon dioxide and nano aluminum oxide, the anti-sinking agent is attapulgite, and the diluting agent is a mixture of water and ethanol. A plate product coated with passivation solution has the advantages of being pollution-free, low-friction, anti-oxidized, anti-wear and extreme pressure-resistant, corrosion-resistant, finger-resistant, having good mechanical performance and the like, and the passivation solution can be directly coated on the surfaces of a zinc-plated plate and parts of certain mechanical equipment for use.
Owner:ANHUI UNIVERSITY OF TECHNOLOGY +1

Lithium ion battery positive electrode slurry, preparation method thereof and lithium ion battery

The invention relates to lithium ion battery positive electrode slurry, a preparation method thereof and a lithium ion battery. The positive electrode slurry comprises a positive electrode active substance, a solvent, a composite binder, a composite conductive agent and a dispersing agent, wherein the composite conductive agent is a mixture composed of a conductive agent A and a conductive agent B; the conductive agent A is a conductive agent capable of forming a point-to-point conductive network; the conductive agent B is a conductive agent capable of forming a point-to-line or surface-contact conductive network; and the conductive agent A and the conductive agent B respectively account for 80-90% and 10-20% of the total weight of the conductive agent. According to the method disclosed bythe invention, the positive electrode slurry is processed and modified by changing the adding sequence of different substances in the positive electrode slurry, adjusting the stirring time, the stirring speed and the proportioning ratio and using the dispersing agent, the positive electrode slurry which enables all the components to be uniformly mixed and is relatively good in dispersion, moderate in viscosity and relatively small in fineness can be prepared, and the positive electrode slurry can improve the processing performance of the lithium battery and also can keep the battery to have excellent electrochemical performance.
Owner:桑顿新能源科技(长沙)有限公司

Three-axis-system composite spinning device and spinning method for tow-apt-to-fall staple

The invention provides a three-axis-system composite spinning device and a spinning method for tow-apt-to-fall staple. The three-axis-system composite spinning method is characterized in that the method comprises the steps of: feeding roving silvers containing the tow-apt-to-fall staple and cotton roving silvers into the back roller of a ring spinning machine, and conducting drafting to form a tow-apt-to-fall staple strand and a cotton strand which stretch straight in parallel; after the tow-apt-to-fall staple strand and the cotton strand are respectively positioned by using a tow-apt-to-fall staple strand positioner and a cotton strand positioner, feeding the tow-apt-to-fall staple strand and the cotton strand into the jaw of a front roller and directly feeding filament adjustable tension pulley into the jaw of the front roller; and after the tow-apt-to-fall staple strand, the cotton strand and the filament are output from the jaw of the front roller, twisting the tow-apt-to-fall staple strand and the filament at a first converging point outside the jaw of the front roller to form a structural section, and twisting the structural section and the cotton strand at a second converging point to form a three-axis-system composite yarn. The device and the method provided by the invention has the advantages that not only can the content of the tow-apt-to-fall staples in the spun composite yarn be improved, but also the situations of fiber damage and tow falling can be effectively avoided.
Owner:DONGHUA UNIV

Integrated spinning method combined with compact spinning, siro spinning and sirofil spinning

ActiveCN103290574AGood coating effectLess hairy and shortYarnRoot hairFilament yarn
The invention relates to an integrated spinning method combined with compact spinning, siro spinning and sirofil spinning. The method comprises the steps that two pieces of rough yarn are unwound from a rough yarn roll on a compact spinning ring spinning frame, and then enter a drafting area in parallel after passing through a three-way yarn-dividing device respectively, the drafting area is composed of a rear leather roller, a rear roller, a three-way horn mouth, a middle leather roller, a leather ring, a middle roller, a lower leather ting, a front leather roller and a front roller, two root hairs formed after drafting enter a negative pressure gathering area of a two-row-hole leather ring or a double-groove-hole special pipe in parallel, the two root hairs after being gathered enter a holding roller in a way of being parallel with a filament, the filament is located between the two root hairs, and after being held, the two root hairs and the filament are gathered, twisted and wound into yarn. According to the integrated spinning method, the yarn with the special core-spun structure is spun, the coating effect of the yarn is good, the spun yarn with high polyester content has the advantages of being less and short in hairiness, high in strength, uniform in evenness and the like, the use range of the filament is widened, and spinning efficiency is improved.
Owner:SHANDONG NANSHAN TEXTILE GARMENT

Powder-coated atomic layer deposition device

The invention discloses a powder-coated atomic layer deposition device. The powder-coated atomic layer deposition device comprises a powder container and a reaction cavity, wherein an inlet source hole is formed in one end of the reaction cavity; a gas inlet tube used for inputting reaction gas or carrier gas is arranged in the inlet source hole in a sealing mode; a cavity door is arranged at the other end of the reaction cavity; the powder container is arranged inside the cavity door; under driving of a power device, rotation can be realized; a gas inlet is formed in the powder container; the gas inlet tube enters an inner cavity of the powder container through the gas inlet; an ultrasonic vibrating rod is arranged inside the reaction cavity; and after the powder container enters the reaction cavity through a guide device, the outer side wall of the powder container is in contact with the ultrasonic vibrating rod. According to the powder-coated atomic layer deposition device disclosed by the invention, a rotary method is combined with an ultrasonic vibrating method, contact possibility of powder and reaction gas can be increased by rotation, and powder agglomeration can be relieved by energy generated by vibrations, so that powder is dispersed, and a uniform and compact film is finally coated on the surface of the powder.
Owner:HUST WUXI RES INST

Method for coating metal magnetic powder on soft magnetic ferrites and method for preparing soft magnetic composite materials

The invention provides a method for coating metal magnetic powder on soft magnetic ferrites. According to the method, the metal magnetic powder is mixed with trace micron or submicron soft magnetic ferrites, and then, a coating layer is formed through microwave high-temperature heat treatment. The invention also discloses a method for preparing the metal soft magnetic composite materials by adopting the coating powder. According to the method, the coating powder is subjected to organic matter coating, lubricating agents are added, pressing and forming are carried out, finally, annealing treatment is carried out, and the soft magnetic composite materials are obtained. The method has the advantages that the characteristics of magnetism, high electrical resistivity and high-temperature resistance of ferrite soft magnetic materials are sufficiently used, the two kinds of soft magnetic materials are compounded, non-magnetic substances are less than other kinds of soft magnetic composite materials, and in addition, a higher heat treatment temperature is realized, so that better magnetic performance is realized. The soft magnetic composite materials prepared by adopting the method provided by the invention have higher magnetic conductivity and low loss, the frequency stability is good, the magnetic loss at high frequency is low, in addition, the preparing process is simple, the environment is protected, the operation is easy, the cost is low, and the method is suitable for industrial mass and large-scale production.
Owner:NBTM NEW MATERIALS GRP
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