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1005results about How to "High sphericity" patented technology

Manufacturing method of micro spherical titanium and titanium alloy powder

ActiveCN104475743AFast purification smeltingControlled purification smeltingSpherical shapedTitanium alloy
The invention relates to a manufacturing method of micro spherical titanium and titanium alloy powder, and belongs to the technical field of metal and alloy powder manufacturing. The manufacturing method comprises the steps that a titanium and titanium alloy wire or bar is manufactured by using sponge titanium in the national standard TA1 grade as a raw material; forvacuum treatment is conducted on a powder manufacturing device, and then the powder manufacturing device is filled with inert protective gas; the raw material wire or bar is fed into a smelting chamber through a continuous feeding mechanism and a straightener, the raw material is heated and smelted through a high-frequency induction coil, and the alloy raw material is molten to form stable liquid flow or drip flow; supersonic atomizing nozzles in atomizers are opened, and breakage, dispersion and forced cooling powder manufacturing are conducted on the molten liquid flow or the drip flow; powder is obtained through a powder collector, and is screened through an ultrasonic vibrating screen to obtain the micro spherical titanium and titanium alloy powder. The micro spherical titanium and titanium alloy powder manufactured through the manufacturing method is small in particle size, high in degree of sphericity, good in liquidity and low in impurity content, and has smooth surfaces.
Owner:有研增材技术有限公司

Silicon/carbon composite microsphere negative electrode material as well as preparation method and application for same

The invention relates to a silicon/carbon composite microsphere negative electrode material as well as a preparation method and an application for the same. The silicon/carbon composite microsphere negative electrode material is silicon/carbon composite microspheres internally provided with pore structures; and each microsphere comprises a matrix material of hard carbon, and an active material of silicon powder. The preparation method for the silicon/carbon composite microsphere negative electrode material comprises the following steps of: uniformly mixing silicon powder, soft carbon, carbon black, a soluble carbon-containing organic adhesive and a solvent with formula amounts to obtain a slurry; and performing spray-drying and carbonization on the slurry to obtain the silicon/carbon composite microsphere negative electrode material. The silicon/carbon composite microsphere negative electrode material provided by the invention has the advantages of being high in tap density, high in reversible capacity, good in cyclicity, good in rate capability, safe and reliable, and high in first-week coulombic efficiency; the preparation method provided by the invention is simple in process, environment-friendly, low in energy consumption and cost, and easy to realize large-scale production.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI

Nickel-cobalt-aluminum ternary precursor as well as preparation method thereof and preparing anode material and method

The invention discloses a nickel-cobalt-aluminum ternary precursor as well as a preparation method thereof and a preparing anode material and a method. The preparation method comprises the following steps: dissolving soluble salts of Ni and Co into ammonia water so as to prepare a Ni and Co ammonia complex ion solution as a complexing agent solution, adding a complexing agent into an aluminum salt solution so as to prepare an Al complex ion solution as an aluminum source solution, combining and adding the Ni and Co soluble salt solution, a precipitant solution, the complexing agent solution and the aluminum source solution into a reaction kettle, controlling a reaction pH value and reaction temperature, controlling the reaction time to be at least greater than 10h, performing solid-liquid separation on slurry obtained through reaction, and washing and drying the obtained solid, thereby obtaining the nickel-cobalt-aluminum ternary precursor. A nickel-cobalt-aluminum ternary anode material can be prepared from a mixture of the precursor and a lithium salt through high-temperature thermal treatment in the presence of air or oxygen. The mixing uniformity of three elements of Ni, Co and Al can be effectively improved, and the tap density of the precursor material can be improved, and the spherical degree of granules can be increased.
Owner:TIANJIN B&M SCI & TECH

Device and method for preparing superfine micro-spherical titanium powder for 3D printing

The invention relates to a device for preparing superfine micro-spherical titanium powder for 3D printing. The device for preparing the superfine micro-spherical titanium powder for 3D printing comprises an automatic feeding system, an insulation dynamic seal unit, an annular gas atomization nozzle, an atomization chamber, an arc cathode smelting well, a radiating cover, a protection cover, a powder collection tank, a supersonic gas crushing mill and a radio frequency plasma reactor. The invention further relates to a method for preparing the superfine micro-spherical titanium powder for 3D printing. The method comprises the steps that firstly a gas atomization unit is used for performing initial powder production on raw titanium powder; then crushing is used for further reducing the granularity of the titanium powder; a plasma unit is used for further processing the titanium powder; the high-energy characteristic of radio frequency plasma is used for injecting carrying gas for irregular-shaped titanium powder particles into a plasma torch, the irregular titanium powder is heated rapidly and melted, the melted particles form drops with high sphericity degree under the action of surface tension, and the drops are solidified rapidly under an ultra-high temperature gradient to form the superfine micro-spherical titanium powder good in sphericity degree, high in purity and low in oxygen content.
Owner:SHANXI ZHUOFENG TITANIUM IND

Preparation method for zirconium-based amorphous alloy as well as powder and large-sized block of zirconium-based amorphous alloy

The invention relates to a preparation method for a zirconium-based amorphous alloy as well as powder and a large-sized block of the zirconium-based amorphous alloy, which belongs to the field of amorphous alloys, and is characterized by comprising the component of Zr61(Cu, Ni)27.5Al10Re1.5(at%), wherein Re is Y, La, Ce, Nd, Gd and Er, and adopting a manner of combination of the gas atomization powder milling technology and the spark plasma sintering technology. The preparation method comprises the following steps: preparing raw materials according to components of the amorphous alloy, and placing the raw materials into an induction crucible of gas atomization powder milling equipment; vacuumizing and filling inert gas for shielding; smelting to obtain an alloy solution with uniform components under the action of induction heating; pouring the alloy solution after smelting into an insulation bag at a constant speed slowly, and filling high-pressure inert gas as an atomizing medium at the same time; atomizing the alloy solution flow into small droplets under the impact of high-pressure airflow, and finally cooling to form amorphous alloy powder; collecting and screening the amorphous alloy powder; and under the protection of the inert gas, utilizing the spark plasma sintering technology to perform sintering on the amorphous alloy powder at different temperatures and pressure to obtain an amorphous alloy block.
Owner:UNIV OF SCI & TECH BEIJING

Lithium ion battery carbon microsphere negative electrode material and preparation method thereof

The invention relates to a preparation method of a lithium ion battery carbon microsphere negative electrode material. The method comprises: mixing carbon black, a binder and a solvent to prepare a slurry, conducting spray drying for molding, and then carrying out a high temperature treatment so as to obtain the lithium ion battery carbon microsphere negative electrode material. The lithium ion battery carbon microsphere negative electrode material provided in the invention has a high degree of sphericity and a controllable particle size, so that close packing of the negative electrode material is realized, the volume energy density of electrodes is enhanced. Meanwhile, lithium ions can be embedded from all directions, and the structural stability, the rate capability and the first coulombic efficiency of the material are improved. The carbon microspheres internally have size-controllable gaps, which make up a plurality of ion transport channels, thus being conducive to improving the charge-discharge capacity and cyclic capacity retention rate of the material. Also, the main preparation raw material is carbon black, which has wide sources, no need for breaking, and a low price. And the preparation method has the advantages of simple process, environmental friendliness, low energy consumption and cost, and is easy for large scale production.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI

Iron-rich high-entropy alloy powder material for 3D printing and preparation method thereof

The invention discloses an iron-rich high-entropy alloy powder material for 3D printing and a preparation method thereof. The molar ratio of the iron-rich high-entropy alloy powder material FexAlCoCrNiB0.3 is as follows: the molar weight of Fe is 2 to 3, the molar weights of Al, Co, Cr and Ni are 1, the molar ratio of B is 0.3, and B is added in an Ni-B alloy form. The iron-rich high-entropy alloy powder material is prepared through a medium frequency induction melting gas atomization one-step method, namely, a metal liquid subjected to medium frequency induction melting and refining is directly fed into a gas atomization device through a guide tube and a tundish to be atomized for powder material preparation. According to the iron-rich high-entropy alloy powder FexAlCoCrNiB0.3material prepared through the method, a phase structure is composed of solid solutions of simple face-centered cubic and body-centered cubic structures, and a product is good in degree of sphericity, controllable in particle size, uniform in components, low in oxygen content and good in fluidity; and according to the preparation method provided by the invention, the technology is simple, the energy consumption is low, the control is easy, the product quality is stable, and the method is applicable to large-scale industrial production, pollution-free to the environment, and environment-friendly in utilization.
Owner:ZHEJIANG ASIA GENERAL SOLDERING & BRAZING MATERIAL

Preparing method for ultra-fine high-purity Ti2AlNb alloy powder

The invention provides a preparing method for ultra-fine high-purity Ti2AlNb alloy powder. The preparing method comprises the following steps that 1, components of a Ti2AlNb base alloy are used as ingredients and smelted into a Ti2AlNb alloy bar; 2, finish turning is carried out on the smelted Ti2AlNb alloy bar, the diameter of a processed electrode bar ranges from 10 mm to 100 mm, and the length ranges from 100 mm to 1000 mm; 3, the electrode bar is loaded into a reaction chamber, the reaction chamber is vacuumized, and helium or argon or helium and argon mixed gas is introduced into the reaction chamber; 4, plasma gun powder of PREP powder manufacturing equipment ranges from 100 kW to 300 kW, a plasma torch comprises a tungsten cathode and a copper anode, the electrode bar is not used as an electrode, the end of the electrode bar is heated to be melted uniformly, atomized drops are tossed out from the end of the electrode bar, the drops are cooled fast in an inert gas environment to form spherical particles, and the spherical particles drop into a bottom collector of the reaction chamber; 5, prepared Ti2AlNb alloy powder is screened and packaged in the inert gas protection environment; 6, the Ti2AlNb alloy powder prepared through the method has the advantages of being ultra-fine, high in purity, high in spherical degree and low in oxygen content.
Owner:SINO EURO MATERIALS TECH OF XIAN CO LTD

Method for continuously producing large-particle spherical cobalt carbonate

The invention relates to a method for continuously producing large-particle spherical cobalt carbonate. The method comprises the following steps: manufacturing a turbid liquid containing small-particle-size cobalt carbonate seed crystal and manufacturing a turbid liquid containing large-particle spherical cobalt carbonate, stirring the turbid liquid containing the small-particle-size cobalt carbonate seed crystal and the turbid liquid containing large-particle-size cobalt carbonate to form a mixed liquid, carrying out solid-liquid separation, washing and filter pressing to obtain a filter cake as a large-particle cobalt carbonate filter cake, drying the filter cake, and repeatedly operating to obtain the large-particle cobalt carbonate powder. According to the method disclosed by the invention, the small-particle-size cobalt carbonate seed crystal is adopted to control the particle size of the large-particle cobalt carbonate in reaction mother liquor, so that the degree of sphericity of cobalt carbonate produced by continuous production can be ensured to be high, the particle size can be stably controlled within the range of 15+/-0.5 microns, and the consistency and the stability of the particle size of the large-particle spherical cobalt carbonate through large-scale continuous production can be realized; the method is simple in process, easy to operate and low in cost, and can provide the high-quality raw material for producing high-end lithium cobalt oxide; the carbonate is used as a precipitant, so that the environment can be optimized; the production efficiency can be improved, and the wide application prospect can be achieved.
Owner:CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST

Multi-component rare earth oxide-doped modified YSZ thermal spraying powder and preparation method thereof

ActiveCN106380210AHigh sphericityImprove microstructure uniformityMolten spray coatingThermal sprayingRare earth
The invention discloses a multi-component rare earth oxide-doped modified YSZ thermal spraying powder and a preparation method thereof. A coating prepared by the above powder is obviously improved in high-temperature phase stability and resistance to high-temperature sintering performance, compared with that of the conventional 8 YSZ material. The Gd2O3-Yb2O3-Y2O3-ZrO2(HfO2) power provided in the invention is composed of 5.5-6.5 wt% of Y2O3, 2.5-3 wt% of Gd2O3, 2.5-3.5 wt% of Yb2O3, 87-89.5 wt% of ZrO2-HfO2, and 2 wt% or less of HfO2, wherein HfO2 is the associated material of the ZrO2. Raw materials are prepared through subjecting the slurry to the sparying, drying, agglomerating, granulating, drying, sieving, high-temperature calcination, plasma densification treatment, drying and sieving process. In this way, the loose density of obtained spherical thermal spraying powders is 1.8-2.3 g / cm<3>, and the fluidity of obtained spherical thermal spraying powders is smaller than 50s / 50g, wherein most of the obtained spherical thermal spraying powders are in metastable tetragonal phase. The powder is prepared through multiple different heat treatment means, so that the high-temperature stability and the performance of the spraying powder and the sprayed coating are improved. Meanwhile, the heat-shock life of a plasma sprayed coating prepared by the above powder is up to over 2300 times at 1200 DEG C, and is far higher than that of a 8 YSZ coating in the same condition.
Owner:CHINESE ACAD OF AGRI MECHANIZATION SCI +1

Method for preparing ceramic tritium proliferation agent in fusion stack cladding

The invention relates to a method for preparing a ceramic tritium breeding agent in a fusion reactor blanket, pertaining to the nuclear fusion field, in particular to a technique for preparing the ceramic tritium breeding agent pellets in the fusion reactor blanket. The method is characterized in that: organic monomers that can generate free radical polymerization and a crosslinking agent are mixed and dissolved with water or an organic solvent to prepare a pre-mixed solution, then ceramic tritium breeding agent powder is added and an initiator and a catalyst are added after defoaming treatment so as to prepare a slurry; the slurry is dripped into a medium by using a dripping device and the medium is in the state of being heating and is exclusive to the solvent used in the slurry. After entering the medium, the dripping liquid takes the form of pellet, solidifies and maintains the shape during the dropping process; the pellet is collected, cleaned, dried and sintered into the tritium breeding agent ceramic pellet material. The formed blanket has high strength and toughness; the formed pellet has high degree of sphericity, smooth surface and good evenness; the shrinkage after drying and sintering are slight, the size of the pellet is easy to be controlled and the strength is high; additionally, the cost is relatively low and the technique is flexible.
Owner:UNIV OF SCI & TECH BEIJING

Long-life modified natural graphite cathode material as well as preparation method and use thereof

The invention discloses a long-life modified natural graphite cathode material as well as a preparation method and use thereof. According to the preparation method, natural graphite powder and asphaltare dipped by virtue of a hot isostatic pressure machine, so that holes in graphite particles can be completely filled with asphalt at high temperature and high pressure conditions; and meanwhile, anasphalt coating layer is formed on the surface of the natural graphite powder, and graphitization is carried out so as to obtain the modified natural graphite cathode material with a core-shell structure, wherein synthetic graphite is embedded into the inside and surface of the natural graphite in situ, the filling rate of the synthetic graphite in the holes of the natural graphite is more than or equal to 94%, the surfaces of the particles are smooth, and the spheroidization degrees of the particles are high. According to the preparation method, the primary coulombic efficiency of the modified natural graphite cathode material is more than or equal to 96%, and the capacity retention ratio of the material after being circulated at a room temperature 1C for 1500 cycles is more than or equal to 80%, so that the prepared material is high in primary coulombic efficiency, long in service life and can be used for replacing synthetic graphite for producing powder battery cathode materials, and the cost is greatly lowered. The preparation method is simple in preparation process and low in cost and has relatively high practicability.
Owner:GUANGDONG DONGDAO NEW ENERGY +1
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