221results about How to "Particle refinement" patented technology

The invention discloses a hydrothermal synthesis method of lithium-ion battery anode material of lithium iron phosphate, relating two kinds of metal phosphate. The steps are as follows: lithium source and phosphorus source are dissolved in water or mixed with water, and added into the reaction autoclave, the quaternary cationic surfactants and the alkylphenols polyoxyethylene ethers nonionic surfactant is also added into the reaction autoclave, the air in the dead volume of the autoclave inside is purged by the inert gas, the autoclave is sealed and heated to 40-50 DEG C with stirring, a feed valve and an exhaust valve are opened, pure ferrous salting liquid is added into the autoclave, and then the autoclave is sealed for the reaction of the material at 140 to 180 DEG C for 30 to 480 minutes; the mixture ratio of the invention is set as follows: the molar ratio of Li, Fe and P is 3.0-3.15:1:1.0-1.15, and then the resultant is filtered, washed, dried and carbon-coated, thus the lithium iron phosphate is obtained. The lithium iron phosphate which is produced by the invention has the advantages that: the electrochemical performance is excellent, the particle size distribution of which the D50 is between 1.5 um to 2 um is even, the phase purity is above 99 percent and the electronic conductivity of the material is improved.

The invention provides a method and a device for preparing high-performance aluminum-base composite material under the action of the pulsed magnetic field with the in situ crystallization method, belonging to the technical field of material preparation. The method comprises the following steps: smelting to synthesize compound material melt at the temperature of 10-200 DEG C higher than the compound material melt liquidus temperature and pouring the compound material melt into a specially-designed crystallizer to make the compound material melt solidify under the action of the pulsed magnetic field. The pulsed magnetic field has the key parameters of the pulse width of 1-500 ms and the amplitude strength of 0.1-50T. The pulsed electromagnetic force is applied to the process of solidifying the compound material melt under the action of the pulsed magnetic field so as to refine the matrix structure and the particle reinforced phase of the compound material at the same time, control the growth of the particle reinforced phase in cluster, increase the bonding strength of the interface of the particle reinforced phase and the matrix and obviously improve the performance of the composite material.

The invention discloses a high-temperature glaze coating, a preparation method thereof, a binder and a using method of the coating, and aims at solving the problems of poor high-temperature resistance, low emissivity and absorptivity in a high-temperature zone, instability, and easiness of attenuation of the existing far-infrared energy-saving coating. The high-temperature glaze coating has the characteristics of good radiation heat transfer effect, high external blackness (the emissivity is greater than 0.95) and the like, and has the advantages of stable emissivity and absorptivity, non-attenuation performance and long service life in a long-term use process. Meanwhile, the coating can be tightly combined with a basal body by matching with the binder disclosed by the invention; the adhesive force is increased; a glazed ceramic polymer can be formed on the basal body after high-temperature sintering; the high-temperature glaze coating has the advantages of hardness, abrasive resistance, and long service life, and does not fall off; and the coating disclosed by the invention can also evenly coat the surface which cannot be covered by general coatings.

The invention discloses water-based facing type fireproof paint. The water-based facing type fireproof paint is prepared from the following raw materials in mass fraction: 18.0-20.0wt% of film forming matter, 23-23.5wt% of a carbon forming catalyst, 10-11wt% of a carbon forming agent, 12-13wt% of a foaming agent, 9-11wt% of pigment filler, 0.49-1.13wt% of auxiliaries, 20-27.5wt% of water, 0-0.8wt% of trisodium phosphate and 0-0.4wt% of a silane defoaming agent. The invention further discloses a preparation method of the water-based facing type fireproof paint. The water-based facing type fireproof paint prepared by the preparation method disclosed by the invention has good fireproof performance, good water resistance, strong adhesive force for a combustible matrix and good decorativeness, and can be used for surface coating of buildings and decorative materials.

The invention discloses a method for preparing a lithium ion battery positive electrode material. The method comprises the following steps: preparing a monodisperse graphene solution with consistent flake diameter size and good dispersion in an ultrasonic oscillation manner; and transferring the graphene solution into a high-shear emulsifying homogenizer for performing shearing dispersion, and filling the sheared graphene solution and a positive active material into a zirconia ball milling tank together for performing ball milling and mixing. The graphene solution is mixed with the positive active material in a mechanical ball milling manner, so that the graphene can be inlaid into or coated with positive active material granules, an excellent bonding interface can be formed, and the positive active material granules are refined; and therefore, the material is uniform, and the rate capability and consistency of the material are improved. Finally, the positive slurry subjected to ball milling is dried, ground and screened so as to obtain the positive electrode material powder.

The invention discloses a method for preparing titanium diboride dispersion-strengthened Cu-base composites by using a mechanical alloying method, taking Cu powder, TiO2 powder, B2O3 powder and Mg powder with the granularity less than 100 meshes and purity more than 99 percent as raw materials. The method comprises the following steps of: thoroughly mixing the Cu powder, the TiO2 powder, the B2O3 powder and the Mg powder; carrying out high-energy ball-grinding on the mixed powder for 3 to 15 hours at the revolution speed of 1000 to 2000 rpm at room temperature; acid pickling the powder for 2 to 15 hours at the temperature of 20 to 80 DEG C with 1 to 3 mol/L hydrochloric acid to get mixed powder of Cu and TiB2; drying the mixed powder of Cu and TiB2, and carrying out high-energy ball-grinding on mixed powder of Cu and TiB2 for 1 to 3 hours ; cold pressing the mixed powder of Cu and TiB2 for forming; and at last sintering the mixture of Cu and TiB2 for 1 to 3 hours in a resistance furnace with argon protection gas at the temperature of 800 to 1000 DEG C to get the TiB2 dispersion-strengthened Cu-base composites with granularity of 5 to 10 microns. The method for preparing the TiB2 dispersion-strengthened Cu-base composites by using the simple high-energy ball-milling mechanical alloying method has the advantages of simple technology, low production cost, high product yield and high product quality.

The invention relates to a preparation method of nano LiFel-xMxPO4/C lithium phosphate composite positive pole material. Lithium dihydrogen phosphate, iron powder, an M element source and an organic carbon source are uniformly mixed in a solvent medium, are treated for 2 to 7h through a high-energy ball mill, have chemical reaction under mechanical activation, and a uniformly dispersed precursor is prepared. The precursor is thermally treated for 2 to 10h at 600 to 800 DEG C under atmosphere protection and cooled to be room temperature, and the nano LiFel-xMxPO4/C lithium phosphate composite positive pole material is prepared. The preparation method has simple and high-efficiency process and the whole process does not produce ammonia, wastewater and other polluting substances, and is applicable to industrial production. The primary particles of the prepared material are nano particles which are uniformly distributed, and the material is characterized by high specific capacity and good rate cycle performance.

The invention discloses a compound side crops milk beverage which is complemented with high dietary fiber, protein and linoleic acid by using oat as the raw material together with side crops containing high protein and high grease such as white sesame seed, soybean, peanut, and the like. The production method utilizes baking incensing technique, emulsifying colloid compound, glue rubbing technique, high-pressure uniform technique and high-pressure sterilizing technique, to completely maintain the nutrition constituents such as dietary fiber in oat, linoleic acid and protein in white sesame seed, soybean, peanut, and the like, efficiently remove the fishy smell of the soybean and the fresh smell of the peanut and increase the compound fragrance of the products. Without adding essence and preservative, the oat compound side crops beverage of the invention contains more nutrition, is more natural and has a function of health protection. The faint scent of oat and the baking fragrance of white sesame seed, soybean and peanut are completely mixed, so the beverage is smooth, fragrant and sweet, is fit for all kinds of customers, can be drunk in four seasons, can be drunk for quenching thirst and can be applied as the breakfast drinking for supplying dietary fiber and protein.

The invention discloses a waste lithium battery wet wire recovery method. The waste lithium battery wet wire recovery method includes the following steps that firstly, discharging processing is conducted on a waste lithium battery, a negative electrode copper foil sheet, containing a graphite negative electrode material, and a positive electrode material are obtained after a shell of the lithium battery is broken; secondly, a graphite powder material subjected to heat treatment is taken, a citric acid-D glucose leaching agent is added, lithium ion leaching is conducted in a low-temperature andconstant-temperature reactor with a stirring device, and a solution, containing lithium, and a graphite material are obtained through separation after the leaching process is finished; thirdly, positive electrode powder is activated; and fourthly, leaching reaction is conducted after the activated positive electrode powder and the citric acid-D glucose leaching agent are mixed, nickel, cobalt, manganese and lithium elements dissolved in filtrate are deposited out, and first-stage waste liquid is obtained after deposition. By means of the waste lithium battery wet wire recovery method, the positive electrode material and the negative electrode material of the lithium battery are effectively recovered at the same time, and the recovery efficiency is improved; and due to the adoption of thecitric acid-D glucose leaching agent system, environment friendliness is achieved, and cost is low.

The invention discloses a preparation method of a particular-reinforced molybdenum-based composite material and belongs to the technical field of preparation of composite materials. The method includes following steps: (1) adding enough ammonia water to an ammonium molybdate solution for enabling the ammonia water to be alkaline; (2) dissolving a soluble aluminum salt, a soluble zircon salt or a soluble lanthanum salt in water to obtain a solution and slowly adding the solution to the ammonium molybdate solution with stirring to generate a flocculent precipitation; (3) performing a heating and evaporatively-drying process to obtain an ammonium molybdate/metal hydroxide composite powder; (4) performing low-temperature calcination to obtain a molybdenum trioxide/metal hydroxide composite powder; (5) reducing the molybdenum trioxide into molybdenum powder; and (6) performing a pressing process and a sintering process to obtain the particulate reinforced molybdenum-based composite material. In the invention, a second phase is firstly precipitated out for forming a nano-scale flocculent precipitation, and then an evaporative crystallization process is carried out so that the ammonium molybdate forms a nucleus with the nano-scale second phase being a nucleation core, wherein the second phase is dispersed and distributed on a molybdenum substrate and is completely metallurgically bonded with the molybdenum substrate. Growth of crystal grain during sintering can be effectively stopped and a crystal grain refining effect is achieved.

The invention discloses a method for preparing nano-TiO2 serving as a cathode material of a lithium ion battery. The method comprises the following steps of: beating precipitates of titanium prepared from metatitanic acid or various titanium sources by using water, adding a coordinating agent into thick liquid according to a molar ratio of the coordinating agent to the titanium of 1.0:1-10:1, regulating the pH value to be between 7 and 14 by using alkali, reacting in a stirring reactor at the temperature of between 20 and 80 DEG C for 10 to 720 minutes, and filtering to obtain solution of the titanium; and adding the alkali into the solution according to a molar ratio of the alkali to the titanium of 1.0:1-50:1, heating the solution to between 80 and 200 DEG C for 10 to 600 minutes, filtering and washing to obtain a precursor of nano-TiO2, and calcining the precursor at the temperature of 120 and 850 DEG C for 0.5 to 20 hours to obtain the nano-TiO2 serving as the cathode material of the lithium ion battery. The method has the characteristics of wide range of raw materials, simple process flow, low energy consumption, low cost, good appearance of product granularity and excellent electrochemical properties.

The invention relates to a method for recycling high-value-added metals from waste nickel-cobalt-manganese lithium ion batteries and belongs to the technical field of recovery of lithium batteries. The method comprises the following steps: (1) thoroughly discharging waste nickel-cobalt-manganese batteries, disassembling and sorting out positive powder, and carrying out heat treatment on the positive powder to remove impurity components such as conductive agents and adhesives in the positive powder; (2) mixing the positive powder subjected to heat treatment with active additive according to a ratio, then mechanically and finely grinding so as to carry out machine-chemical synergistic activation of the positive powder; and (3) mixing the activated positive powder with citric acid-D glucose leachate leaching agent, then carrying out leaching reaction and precipitating nickel, cobalt, manganese and lithium in the filtrate to obtain the high-value-added metals. According to the method, citric acid in the citric acid-D glucose leachate can be recycled after extracting the metal elements; high consumption of the leachate is avoided; the leaching efficiency is improved; the recycling costis reduced.

The invention provides a preparation method of composite MnO2 anode material for a chargeable Li-Mn battery and relates to a manufacturing method of electrode material; finished products are manufactured by the steps of purification of raw material, calcining and refining and reactive sintering; the method comprises the following steps: merchant electrolysis MnO2 material is acid-dipped and then is filtered and cleaned, and the washed material is ground finely; and then nonionic surface active agents with 0.3-0.5 percent of weight ratio are added, the mixture is heated to 120-140 DEG C in a sealing agitated reactor, and the temperature is kept for 3-5 hours, after the temperature is reduced, the reaction material is filtered and dried, and the dried material is placed in an electric furnace for calcining; the calcined MnO2 and chemically pure lithium nitrate are mixed with 1:(0.3-0.4) of molar ratio, the mixture is ground in a dry state, and then is sintered for 10-24 hours at 260-400DEG C under atmosphere, and then dry ball-milling and sieving are carried out to obtain the needed composite MnO2 material.

The invention discloses a method for growing a polycrystalline diamond piece by using a microwave plasma chemical vapor deposition method and relates to the field of artificial diamond. The method specifically comprises the following steps: (1) pretreating a substrate in microwave plasma chemical vapor deposition equipment; (2) forming a core for 0.4-0.6 hour on the pretreated substrate accordingto common polycrystalline diamond piece growth process, controlling growth time according to a final growth thickness, and carrying out power-off, grinding and polishing for multiple times for repeated multi-time growth. The self-support thickness of the polycrystalline diamond piece grown by using the method can be a millimeter grade or greater, the phenomenon that diamond granules are continuously increased along with increase of thicknesses can be effectively inhibited, then the purposes that the diamond granules are refined while thickness requirements are met, and the density, the mechanical strength and the surface smoothness after polishing of the diamond piece are improved, are achieved, and effects of a CVD (Chemical Vapor Deposition) polycrystalline diamond material can be sufficiently taken into play.

The invention discloses a preparation method of an alkaline anion-exchange membrane. The preparation method comprises the treatment process on alkaline resin, and the treatment process comprises the steps that AER alkaline resin is placed in an inorganic salt aqueous solution for soaking, then the AER alkaline resin and the inorganic salt aqueous solution are transferred to a heat-insulated vessel, liquid nitrogen is injected into the vessel for cooling, and AER alkaline resin particles are fully ground and crushed; liquid nitrogen freezing treatment is stopped, when the temperature is naturally recovered to room temperature, materials in the vessel are filtered with a filter screen, and fine alkaline resin powder is obtained. The fine alkaline resin powder serves as anion exchange resin of a chemical active group to prepare the alkaline anion-exchange membrane. By means of the resin treatment process, the AER alkaline resin particles can be uniformly distributed in the prepared anion-exchange membrane, the electrochemical performance of the alkaline anion-exchange membrane is further improved, and a fuel cell assembled through the alkaline anion-exchange membrane prepared through the method shows the excellent electricity generation performance.

The invention belongs to the technical field of fiber manufacturing, and more specifically relates to an antibacterial deodorizing nanometer fiber, and a preparation method thereof. The antibacterialdeodorizing nanometer fiber is prepared from, by weight, 22 to 26 parts of nanometer titanium dioxide, 30 to 35 parts of chitosan, 3 to 5 parts of rose flower, 55 to 60 parts of Glacial Acetic Acid, 2to 4 parts of single layer graphene, 2 to 3 parts of bamboo fiber micropowder, 1 to 2 parts of carboxymethylcellulose sodium, and 1 to 2 parts of garlic essential oil. The antibacterial deodorizing nanometer fiber possesses excellent bacteria killing and inhibiting and deodorizing effect; the antibacterial validity and broad spectrum activity of chitosan nanometer fiber are improved; the raw materials are relatively cheap; no high temperature treatment is needed in the preparation process; the preparation process is simple and convenient; cost is low; efficiency is high; no pollution is caused; and energy consumption is low.

The invention discloses a hollow laser inside-beam powder feeding composite electrodeposition machining method and device, relates to electrochemical deposition machining of composite materials, and belongs to the field of non-traditional machining in a manufacturing technology. According to the device, a hollow anode tube is perpendicularly placed in hollow laser, particles are sprayed out from an anode, are scattered in a laser focal region and then drop in a solution, the laser illuminates the solution to generate high-temperature and high-pressure plasma, in an outward expansion process of the plasma, the particles are dispersed by a generated jet impact force, and the particles can uniformly reach the surface of a cathode and then are captured by the cathode, so that the particles easily enter a coating to form a nano-particle composite coating. By the impact effect of the laser, the agglomeration probability of the particles in the traditional composite electrodeposition process is reduced, the compound quantity of the particles is increased, and the quality of a deposition layer can be improved remarkably. Meanwhile, electrochemical reaction rate can be increased by heat effect of the laser, and therefore, the deposition speed is increased.

The invention provides a preparation method of iron phosphate dihydrate. The method comprises the following steps: adding 115-126 parts by weight of phosphoric acid to 400 parts by weight of deionized water to prepare a phosphoric acid solution and keeping the temperature of the solution at 50-65 DEG C; adding 56 parts by weight of reduced iron powder in a stirring state, reacting for 1-3 hours, adding the obtained product to a ball mill for ball-milling to obtain a ball-milled material; putting the taken ball-milled material into a container, adding 56-68 parts of hydrogen peroxide, stirring the hydrogen peroxide evenly and then putting the hydrogen peroxide into a reaction kettle for treatment at 60-140 DEG C for 6-12 hours to obtain a reaction product; and stirring and dispersing the reaction product evenly and then carrying out spray drying at 150-180 DEG C to obtain the iron phosphate dihydrate. The iron phosphate dihydrate synthesized by the method has the characteristics of being high in purity, simple in preparation technology, low in cost and free of pollution in treatment, and can be used as a raw material of producing lithium iron phosphate.

The invention relates to a pre-lithiatedanode material with the high reversible capacity and a preparation method of the pre-lithiatedanode material. The pre-lithiatedanode material comprises a graphite-like carbon material, metallic oxide or silicon uniformly distributed on the pre-lithiatedanode material, and lithium carbonate; the first coulomb efficiency of the anode material is 5%-10% higherthan that of the corresponding pure metallic oxide or silicon anode material, and the capacity retention rate of the anode material is no less than 85% after cycling for 100-350 times. The preparationmethod includes the steps that the metallic oxide or silicon powder, lithium carbonate powder, the graphite-like carbon material and a grinding agent are stirred,mixed and subjected to ball-milling.According to the pre-lithiatedanode material with the high reversible capacity and the preparation method of the pre-lithiatedanode material, by adding the lithium carbonate, the irreversible capacityof the anode material in the initial charging and discharging process is lowered, and thus the first coulomb efficiency is improved; by adding the graphite-like carbon material, structural stabilityof the material in the reaction process and conductivity of an electrode material are improved; and according to the ball-milling method, the size of the anode material particlescan be refined in a short time, and the volume change of the anode material is buffered.

A laser 3D printing method for an in-situ synthesized alumina particle reinforced nickel base composite comprises the steps that firstly, nickel base alloy and pure aluminum powder are subjected to mechanical ball milling, particle size screening is carried out on the powder obtained after ball milling, and a laser 3D printing technological window is initially optimized; a temperature changing curve of a molten pool is recorded regularly with a colorimetric pyrometer, and the average peak temperature T of the temperature curve, the intercept t of the solid phase line and the temperature curveand the average cooling rate Xi of the molten pool are extracted and calculated; and technological parameters are optimized according to the principles that T is higher than or equal to 1.4 Tm and lower than or equal to 1.8 Tm, t is larger or equal to 0.55 s and smaller than or equal to 0.95 s and Xi is larger than or equal to 3.5*103 DEG C/s, and an optimized technological window is obtained, wherein the laser output power is 800-1200 W, the defocusing amount is -2.5 mm, the diameter of a laser spot is 2-3 mm, the scanning speed is 8-14 mm/s, and the powder feeding amount is 12-16 g/min. By means of the laser 3D printing method, in-situ synthesis of alumina particles can be achieved in the forming process, and the mechanical performance of nickel base forming parts can be improved.

The invention belongs to the technical field of traditional Chinese medicine preparation, and relates to a traditional Chinese medicine composition for treating sore throat and constipation and a preparation method thereof, in particular to a medicament prepared from the raw material drugs with effective components such as silkworm excrement, rhubarb, figwort, Chinese honeylocust fruit, red paeony root, dwarf lilyturf turber, forsythia, radix isatidis, rehmannia, honeysuckle, rhizome imperatae, tree peony bark, natural indigo, fritillaria cirrhosa, mint, and licorice and used for clearing away heat and toxic materials and relieving sore throat and pain, and treating diseases such as sore throat caused by pneumogastric intrinsic heat, fever and fidget, constipation, children acute pharyngitis, acute tonsillitis, and the like and a preparation method thereof. The invention also discloses a recipe for gelata prepared by extracting and mixing sixteen medicinal materials such as silkworm excrement, rhubarb and the like, quality standard, and a quality inspection method. The dosage form has the advantages of convenience for taking and carrying, good mouth feel, and easy acceptance by children, overcomes the defect that pills and tablets are difficult for the children to take, and is remarkably superior to cleaning pills.