65results about How to "Good particle dispersion" patented technology

The invention discloses a two-dimensional porous graphitized carbon-coated nickel-tin alloy material and preparation and application thereof. Carbon-coated nickel-tin alloy nano-particles are uniformly embedded into two-dimensional porous graphitized carbon plates to form the material. A preparation procedure for the material includes utilizing NaCl as a dispersing agent and a carrier, dissolving the NaCl in a nickel source and a carbon source, mixing the NaCl, the nickel source and the carbon source, drying the NaCl, the nickel source and the carbon source under a vacuum condition and finely grinding the NaCl, the nickel source and the carbon source to obtain a mixture; placing the mixture and a tin source to be subjected to gas-phase exchange into a tube furnace, and calcining the mixture and the tin source under the protection of inert gas to obtain a calcined product; washing the calcined product to obtain the two-dimensional porous graphitized carbon-coated nickel-tin alloy material. The two-dimensional porous graphitized carbon-coated nickel-tin alloy material, the preparation and the application have the advantages that the preparation procedure is safe and harmless, operation is simple, the yield is high, and the prepared two-dimensional porous graphitized carbon-coated nickel-tin alloy material which is used as a cathode material of a lithium ion battery is high in reversible capacity and cycle stability.

The invention relates to a fragrant microcapsule type finishing agent which comprises the following constituents by mass percentage: 35-45 percent of fragrant nano microcapsule, 35-45 percent of thickening agent, 15-25 percent of adhesive and 1-5 percent of color paste, wherein the sum of the percentages of all the constituents is 100 percent. The invention also discloses a nano microcapsule type dry garment piece which has lasting fragrance more than 1 year, is sterile, has high safety, has no stimulation to the skin and no allergic response, and is suitable for fragrance finishing and storing of fabrics and ready-to-wear clothing made of cotton, wool, silk, linen and chemical fiber; and the fragrant nano microcapsule has good particle dispersivity on base cloth and is extremely easy to embed into the base cloth tissue structure.

The invention provides a SiC particle-enhanced aluminum based composite with high-temperature wear resistance and a preparation method of the SiC particle-enhanced aluminum based composite and belongsto the field of aluminum alloy materials. The preparation method comprises the following steps of smelting industrial pure aluminum, aluminum-silicon alloy, aluminum-copper alloy, pure magnesium, thealuminum-copper alloy, aluminum-nickel alloy, aluminum-zinc alloy, aluminum-titanium alloy and aluminum-magnesium alloy at 700-800 DEG C according to a mass ratio; performing degassing refining; performing casting at 700-750 DEG C; using vacuum smelting, stirring and casting equipment to smelt a substrate at 700-800 DEG C; adding micron-size SiC particles; performing semi-solid state stirring at550-570 DEG C; performing casting at 700-750 DEG C; and performing T6 heat treatment. For the SiC particle-enhanced aluminum based composite with the high-temperature wear resistance and the preparation method, the substrate alloy components are designed self according to an alloy phase diagram, and a proper element content is selected, so that a high temperature resistant hard phase occurs aftersubstrate alloy heat treatment, and the substrate hardness at high temperature is ensured; and meanwhile, by adding an SiC-enhanced phase, the high temperature resistance of the composite is further improved.

The invention discloses a preparation method of flowerlike lithium manganese phosphate nano-particles. The preparation method comprises the following steps: mixing ethylene glycol with water in a volume ratio of 1 to (1-2) to obtain an ethylene glycol/water mixed solvent; taking one part of the ethylene glycol/water mixed solvent to mix with manganese sulfate to obtain a mixed solution I with concentration of 0.1-0.2mol/L; then, taking one part of the ethylene glycol/water mixed solvent to mix with lithium sulfate, ammonium dihydrogen phosphate and sodium hydroxide to obtain a mixed solution II, wherein the concentration of the lithium sulfate in the mixed solution II is 0.15-0.3mol/L; adding the mixed solution I into the mixed solution II, uniformly stirring to obtain a precursor solution, performing hydrothermal reaction for 8-24 hours at 160-240 DEG C, and then, performing post-treatment to obtain the flowerlike lithium manganese phosphate nano-particles. According to the preparation method disclosed by the invention, by precisely controlling the charging sequences and the reaction conditions, a method of preparing the flowerlike lithium manganese phosphate nano-particles is obtained, wherein the method is simple in process and easy to control.

Disclosed is a method for preparing a nanometer titanium dioxide super-hydrophobic film. Nanometer titanium dioxide is prepared by a hydrothermal method, on basis of hydrolysis reaction, titanium n-propoxide with hydrolysis reaction under natural conditions is selected as a titanium source, nanometer titanium dioxide with good crystal form is obtained through controlling of reaction conditions and used for preparing a composite material, anatase-type crystal form is used for preparing a super-hydrophobic thin film, and then the super-hydrophobic thin film is formed after modification by low surface energy substance stearic acid. The method for preparing the nanometer titanium dioxide super-hydrophobic film has the advantages that the method is low in preparation costs, simple and rapid, a contact angle of the prepared super-hydrophobic film is water contact angle of hydrophobic nanometer titanium dioxide, which is 95.3 degrees, rolling angle is 0-4 degrees, grain size of nanometer titanium dioxide is about 7nm, grain dispersibility and stability are good, effects are still good though the nanometer titanium dioxide super-hydrophobic film is put in air for a period of time, acidic and alkali resistance is good, and the nanometer titanium dioxide super-hydrophobic film can be used for resisting water, freezing and metallic corrosion.

Organic polymer particles having a structure shown by the following formula (1) are disclosed.

wherein A represents an alkylidene group, an alkylene group, a cyclohexylene group, or a phenylene group, and B represents a linear or branched alkylene group or an alkylidene group having 1 to 6 carbon atoms.

The invention relates to a method for preparing a spiral carbon fiber. The method is characterized in that graphite is used as a basal body and is subjected to deoiling, sensitizing, activation treatment to form an even nickel-phosphorus alloy layer on the surface of the graphite through a chemical plating process, and the nickel-phosphorus alloy layer is used as a catalyst; under the action of a compound containing S, N2 is used as carrier gas; the flow of reaction gas C2H2/H2 is controlled to be between 1/2 and 1/6; the reaction temperature is between 600 and 800 DEG C; the reaction time is between 1 and 3 hours; and the carbon fiber with two spiral structures is prepared, namely a single spiral carbon fiber and a double spiral carbon fiber. The diameter of a spiral tube is between 0.5 and 9 mu m; the thread pitch is between 0.1 and 3 mu m; and the length reaches the spiral carbon fiber of millimeter level. The method is simple, convenient and easy to operate, has an even and dense plating layer, good particle dis paster persity and high catalytic activation; the manufactured spiral carbon fiber has high purity and yield and can control the spiral shape of the spiral carbon fiber through changing the reaction condition.

The invention discloses nanometer titanium dioxide powder for a flue gas deodorization/denitration catalyst and a preparation method thereof. The nanometer titanium dioxide powder is prepared from the following ingredients in mass percentage: 50-100% of TiO2, 0-50% of SiO2, 0-15% of WO3 and 0-10% of V2O5; the preparation method of the nanometer titanium dioxide powder comprises the following steps: carrying out hydrolysis on titanyl sulfate or titanium sulfate used as a raw material in a microwave heating manner to obtain titanic hydroxide, filtering, washing, adding with deionized water, pulping to form 20-80% metatitanic acid slurry, adding with SiO2 sol, a V2O5 precursor-ammonium metavanadate and/or a WO3 precursor-ammonium paratungstate, adjusting the pH value to be within a range of 8-11, carrying out atmospheric-pressure microwave hydro-thermal treatment, performing filter pressing, microwave sintering and crushing to obtain the nanometer titanium dioxide powder. The invention also relates to an application of the nanometer titanium dioxide powder used as the flue gas deodorization/denitration catalyst.

The invention discloses a preparation method of Eu<3+> doped molybdate red fluorescent powder used for a white light LED (Light Emitting Diode). A chemical formula of the red fluorescent powder is Sr2CaMoO6:xEu<3+>, wherein x is greater than or equal to 0.01 and less than or equal to 0.15. Raw materials are weighed according to a stoichiometric ratio, the raw materials and a fluxing agent are fully and evenly mixed, and a mixture is added into double crucibles made of corundum, wave absorbent is arranged between the double crucibles, the double crucibles are loaded into a microvan, temperature is quickly raised to 750 to 950DEG C, the mixture is sintered in an oxidation environment, and heat preservation time is 0.5 to 4h; finally, cooling, grinding, washing and drying are carried out to obtain the red fluorescent powder used for the white light LED. During microvan sintering, the fluxing agent is added to accelerate the formation and growth of molybdate polycrystal, the sintering degree of the fluorescent powder is obviously lowered, sintering time is obviously shortened, a powder body is loose and does not need to be mechanically smashed, in addition, the shapes of aluminate fluorescent powder particles are effectively controlled, and the particles with a small particle diameter and even distribution are obtained, wherein the appearance of the particles is similar to a sphere.

The invention discloses a preparation method of M3Si6O12N2: xRe system green fluorescent powder. According to the preparation method, M is one or the mixture of more than two of Ca, Sr and Ba; Re means a rare-earth element; and x is more than or equal to 0.2 mol% and less than or equal to 20mol%. The method comprises the steps as follows: weighing raw materials based on the stoichiometric ratio of various elements in the chemical formula of fluorescent powder; fully and uniformly mixing the raw materials; then placing the mixture into a sagger manufactured by a wave-transmitting material; positioning the sagger into a special microwave oven; adjusting the microwave power to control the temperature raise rate under a certain gas atmosphere; heating to reach the synthesizing temperature; and finally, cooling and simply grinding to obtain the system green fluorescent powder. Compared with traditional high-temperature solid phase method, the preparation method disclosed by the invention adopts microwave heating, therefore, the synthesizing temperature is reduced to 1000 to 1500 DEG C, moreover, the reaction time is reduced, and the production efficiency is improved; and the prepared green fluorescent powder has the advantages of fine grain size, high crystallizing performance, narrow range of size distribution, regular appearance and shape, high particle dispersing performance, and the like, and is specifically applied to white light and backlight LEDs (Light Emitting Diodes).

The present invention is directed at providing fine nickel particles with a sharp particle size distribution, and providing an electroconductive paste using the nickel particles. In order to obtain the nickel particles capable of achieving the purpose, a method for producing the nickel particle by elevating a temperature of the reactive solution containing a nickel salt and a polyol to a reduction temperature, and reducing the nickel salt in the reactive solution which is characterized in that the reactive solution is prepared to contain a carboxylic acid or an amine having a carboxyl functional group and/or an amino functional group, and a precious metal catalyst before the solution temperature is elevated to the reduction temperature. Nickel particles obtained with the production method have an average image analytical particle diameter of 1 nm to 300 nm.

The invention relates to the field of nano material preparation, and in particular, relates to an automatic continuous production device for nanocapsules and a method for preparing the nanocapsules byusing the device. The device includes a storage tank, a shearing device, an emulsifying homogenizing device and a solvent recovery device which are connected in series in sequence through a pipeline,wherein the storage tank includes a dispersed phase storage tank for storing a dispersed phase material and a continuous phase storage tank for storing a continuous phase material; the emulsifying homogenizing device preferably includes a multistage emulsifier, a membrane emulsifier or a high pressure homogenizer or a combination thereof. The method for preparing the nanocapsules by using the device includes the steps: preparing the dispersed phase material and the continuous phase material respectively, mixing, carrying out high-speed shearing, emulsifying and homogenizing to obtain a fine emulsion, and then recovering to obtain the nanocapsules by a solvent. The device can prepare the nanocapsules with uniform and controllable particle size, the process is simple, the energy consumptionof the preparation process is low, and the large-scale automatic continuous production of the nanocapsules can be realized.

The invention relates to a preparation method of a carbon-coated lithium manganese borate cathode material for a lithium ion battery, belonging to the technical field of lithium ion batteries. The preparation method of the carbon-coated lithium manganese borate cathode material for the lithium ion battery comprises the following process steps of (1) mixing a lithium source compound, a manganese source compound, a boron source compound and a carbon source compound according to the molar ratio that Li to Mn to B to a carbon source is equal to (1-1.05) to 1 to 1 to (0.1-1.0), then, adding deionized water to form a solution, next, continuing to stir at the temperature of 50-90 DEG C to slowly evaporate water to form sol, and then, drying the sol at the temperature of 70-110 DEG C; (2) presintering under the protection of inert gases and at the temperature of 300-400 DEG C for 3-5h, grinding for 5-10min after naturally cooling, flaking at the pressure of 5-20MPa, calcining under the protection of inert gases and at the temperature of 700-850 DEG C for 12-24h, and grinding after naturally cooling to obtain the carbon-coated lithium manganese borate cathode material. The preparation method has the advantages of simple process route, good repeatability, suitability for industrial production and low manufacturing cost; in addition, the prepared material is uniform in particle size distribution, favorable in electrochemical property and the like.

The invention provides a double-loaded nano pesticide sustained-release capsule for preventing and curing rice sheath blight disease and a preparation method of the double-loaded nano pesticide sustained-release capsule. The double-loaded nano pesticide sustained-release capsule is prepared from the following components by weight: 2.1-2.5 parts of validamycin, 0.3-0.5 part of thifluzamide, 2.4-4 parts of capsule wall materials, 45-70 parts of organic solvent, 3-5 parts of an emulsifier, 225-350 parts of water, 15-150 parts of excipient and 0-10 parts of adjuvant; and the weight ratio of the validamycin to the thifluzamide is (5 to 1)-(7 to 1). The double-loaded nano pesticide sustained-release capsule is small in particle size, good in particle dispersibility, excellent in sustained-release performance, high in effective utilization rate, good in prevention and control effect on the rice sheath blight disease and simple in preparation process, and industrialization is facilitated.

The invention relates to a high-temperature lithium battery, in particular to a preparation method of Si@SnO2@C microspheres serving as a positive electrode material of a high-temperature lithium battery, and solves the problems that the capacity of the high-temperature lithium battery is easily and quickly attenuated and the conductivity of the high-temperature lithium battery is weaker when monatomic silicon is used as a positive electrode material of the high-temperature lithium battery. The invention relates to the preparation method of the Si@SnO2@C microspheres used as the positive electrode material of the high-temperature lithium battery. The method is realized by adopting the following steps: (1) carrying out surface activation treatment on silicon powder; 2) adding the activatedsilicon powder into 80mL of deionized water; 3) adding glucose into a solution A; (4) adding 0.28-0.5 g of stannous chloride and 0.04-0.09 g of ammonium fluoride into a solution B, (5) transferring aprecursor suspension into a 100mL polytetrafluoroethylene reaction kettle; and (6) cleaning and drying a collected precipitate, and putting the precipitate into a tubular furnace.

The invention discloses a method for synthesizing a FeF3/CNTs positive electrode material by a liquid phase method and belongs to the technical field of lithium ion batteries. The method comprises dispersing carbon nanotubes in a mixed solution of nitric acid and sulfuric acid through magnetic stirring to obtain a mixed solution A, adding hydrofluoric acid into the mixed solution A to obtain a mixed solution B, dissolving a surfactant and ferric acetylacetonate in an aqueous solution of ethanol to obtain a mixed solution C, adding the mixed solution C into the mixed solution B drop by drop, carrying out magnetic stirring for a reaction, after dropwise addition, carrying out stirring for 15-24h, filtering and washing the reaction product, carrying out drying through a vacuum drying oven, and carrying out calcination in an inert atmosphere at a temperature of 300 to 500 DEG C to obtain the FeF3/CNTs positive electrode material. The FeF3/CNTs positive electrode material has the characteristics of small particle size, good particle dispersibility and good electrical conductivity, can be used for preparation of a lithium ion battery, and has a high charge-discharge ratio capacity, goodcirculation stability and high rate performance.

The invention relates to a preparing method of a magnetostriciton material, and belongs to the technical field of preparation of magnetostriciton materials. Aimed at the problem that in the current prepared resin matrix magnetostriciton material, interface bonding is bad and usability performance of the materials is reduced due to the fact that magnetostriciton particles have low wetting with resin, and the particles are prone to clustering and segregation when being mixed together, the magnetostriciton material is provided. According to the preparing method of the magnetostriciton material, magnetic ceramic powder is prepared, and the magnetic ceramic powder is then combined with epoxy resin; under the action of a coupling agent, magnetic ceramic is uniformly recombined to the inner part of the resin; under a magnetic action of an external permanent magnet, bonding strength between modified resin matrix and magnetic-induced particles is strengthened, sedimentation speed of particles among the resin is lowered; under the action of a magnetic field system, a controllable oriented magnetic field is determined, and a stable compound system is formed. The magnetostriciton material has a high combination degree, particles have good dispersity, and magnetostriction coefficient improved by 5-8% compared with similar products; meanwhile, the preparing method is simple, the raw material is green and safe, and the prepared magnetostriciton material does not cause environment pollution.

The invention discloses a hydrothermal synthesis method for positive pole material lithium manganese phosphate nanoparticles of lithium-ion batteries. According to the hydrothermal synthesis method, deionized water serves as a solvent, a manganese source, a lithium source and phosphoric acid are taken as reacting materials, a block copolymer is taken as a template agent, potassium hydroxide is taken as a mineralizer, so as to promote nucleation and growth of lithium manganese phosphate, heat treatment is carried out at high temperature and high pressure, then, calcining treatment is carried out at the temperature of 550-650 DEG C under the protection of a nitrogen or argon atmosphere while carrying out heat preservation, and then, the lithium manganese phosphate nanoparticles are obtained. The hydrothermal synthesis method has the advantages that the product is stable in quality, high in purity and good in particle dispersibility and is beneficial to the diffusion of lithium ions and the improvement of the electrochemical properties of a lithium-ion battery, and the preparation process is simple in process, easy to control and low in cost and is pollution-free, so that the large-scale production is facilitated.

The present invention relates to a kind of nanometer red CaSiO3:PbMn fluorescent material and its preparation process. The fluorescent material features its chemical expression of 0.7CaO.0.025PbO.0.033MnO.1.3SiO2, and includes matrix material calcium nitrate and silica aerosol, fluorescent sensitizer lead nitrate, fluorescent activator manganese nitrate and non-ionic surfactant ON7O, XL80 or TO8, with the weight ratio of calcium nitrate, lead nitrate, manganese nitrate and silica aerosol being 3.2971 to 0.1656 to 0.2706 to 1.5622. The fluorescent material has high fluorescent strength, high particle dispersivity, average nanometer crystal particle size of 150 nm and excellent application performance.