34results about How to "High particle purity" patented technology

The invention belongs to the technical field of lithium sulfur batteries, and particularly relates to a preparation method of a positive electrode material of a lithium sulfur battery. The preparation method comprises the following steps: adding a carbon nano tube into a nitrogen source substance solution with the mass concentration not less than 10%, mixing uniformly, transferring into a hydrothermal/solvent thermal reaction kettle for heat preservation, cooling, and washing and drying a reaction product so as to obtain a carbon nitride nano tube; dissolving sulfur into an organic solvent so as to obtain a sulfur contained organic solution, then adding the carbon nitride nano tube obtained in the step 1 into the sulfur contained organic solution, carrying out ultrasonic dispersion for more than 0.5 hour, and performing ultrasound treatment continuously while dropwise adding an extracting agent, wherein the mass ratio of the extracting agent to the organic solvent is (0.5-10) to 1; and then drying, and carrying out freeze drying on a product after the solvent is evaporated by more than a half. Compared with the prior art, the carbon-sulfur compound obtained by the method is good in circulation stability.

A particle-beam projection processing apparatus for irradiating a target, with an illumination system for forming a wide-area illuminating beam of energetic electrically charged particles; a pattern definition means for positioning an aperture pattern in the path of the illuminating beam; and a projection system for projecting the beam thus patterned onto a target to be positioned after the projection system. A foil located across the path of the patterned beam is positioned between the pattern definition means and the position of the target at a location close to an image of the aperture pattern formed by the projection system.

The invention relates to a preparation method of BiFeO3 nano-particles and particles, and a mixed nitrate solution is prepared by Fe(NO3)3.9H2O and Bi(NO3)3.5H2O or Fe2O3 and Bi2O3 according to the stoichiometry of 1:1. Glycine is added to be used as fuel, and 5 to 10 millilitres of oxalic acid dehydration is added. The obtained solution is put into a microwave oven to be heated with 800 watt power and continuously heated for 10 to 20 seconds after the water is dried out, and the rapid combustion reaction of a mixture happens, thereby obtaining a loose nano-particle powder product. The obtained particle powder is suppressed into scraps by a preforming machine, and a bulk sample is obtained. Then, a bulk sample is arranged in the microwave oven to nodulize and to rapidly quench to the room temperature, and a massive particle product which is uniform in size is obtained. The BiFeO3 prepared by the method has the advantages of high purity, uniform particle size and adjustable granularity.

The invention discloses a preparation method of nano petaline Ni(OH)2. The method comprises the steps of taking nickel sulfate and urea as materials, preparing mixed solution of which the molar ratio of nickel to urea is 1:1 to 1:6 and then transferring the mixed solution to a 200mL of self-pressure lining polytetrafluoroethylene stainless steel reaction kettle, wherein the loading degree of a hydrothermal reaction kettle can be up to 80%; covering an inner cover and an outer cover to feed to an electric heating constant-temperature tank, heating the solution to 170 DEG C, reacting for 2-20 hours at constant temperature, then naturally cooling the solution to room temperature, filtering and washing the solution into a neutral state by deionized water; drying the solution into constant weight at 80 DEG C, and thinning the petals to prepare the nano petaline Ni(OH)2. According to the preparation method, the urea is taken as a precipitator, and a nano petaline Ni(OH)2 microsphere is directly prepared by hydrothermal syntheses; the method is simple in process, low in cost and easy to control without high-temperature sintering or a template agent, the obtained product crystal particle has the advantages that the size is uniform; the particle purity is high; the dispersity is good, and the crystalline form is good and controllable.

The invention discloses a preparation method of a rod-shaped self-assembled spherical zinc-cadmium-sulfur solid solution material. The preparation method comprises the following steps: measuring H2O with a measuring cylinder, adding 10mL of EN (ethylene diamine) to prepare a mixed solution, and performing magnetic stirring and ultrasonic treatment to form a mixed solution A; adding zinc acetate dihydrate and cadmium nitrate tetrahydrate which are taken as raw materials into the mixed solution A, and performing magnetic stirring and ultrasonic treatment to form a mixed solution B; adding L-cysteine which is taken as a sulfur source into the mixed solution B, and performing magnetic stirring and ultrasonic treatment to form a mixed solution C; adding the mixed solution C into an inner liningmade of polytetrafluoroethylene, and performing microwave hydrothermal reaction; and after the reaction is completed, performing centrifugal washing respectively with deionized water and ethanol forseveral times, and then performing drying and grinding to obtain zinc-cadmium-sulfur solid solution material powder.

The invention discloses a modified iron-copper bimetallic nanoparticle and a preparation method thereof. The modified iron-copper bimetallic nanoparticle includes chitosan and iron-copper bimetallic nanoparticles, wherein chitosan is coated on the surfaces of the iron-copper bimetallic nanoparticles. The preparation method includes: mixing a chitosan solution with a ferrous sulfate solution, adding an NaHB4 solution dropwise for liquid phase reduction reaction, and adding a copper sulfate solution dropwise for in-situ displacement reaction to obtain the modified iron-copper bimetallic nanoparticle. The modified iron-copper bimetallic nanoparticle provided by the invention have the advantages of good dispersibility, strong reducibility, long service life and the like, and is an environment-friendly material that has good application prospects and can be applied to in-situ restoration of heavy metal polluted underground water. The preparation method of the modified iron-copper bimetallicnanoparticle provided by the invention has the advantages of simple operation, low cost, cleanness, no pollution, etc.

The invention discloses insulator anti-icing coating and a preparation method thereof. The anti-icing coating is prepared from the following components in parts by mass: 35-45 parts of fluorosiliconeresin, 4-5.5 parts of aluminum oxide, 6-8 parts of silicon dioxide, 2-3 parts of titanium dioxide, 0.3-0.8 part of dispersing agent, 0.4-0.9 part of surfactant, 0.2-0.9 part of de-foaming agent, 0.1-0.5 part of catalyst, 0.02-0.08 part of anti-oxidant, 0.2-0.8 part of curing agent and 30-50 parts of solvent PMA. The preparation method comprises the following steps: separately adding aluminum oxide, silicon dioxide and titanium dioxide into the surfactant, adding absolute ethyl alcohol, stirring until completely wet while adding, ultrasonically stirring and dispersing, drying, wetting and drying by distilling through PMA, stirring and dispersing after mixing fluorosilicone resin with residual PMA, pouring all system solution into a grinder to grind, pouring the de-foaming agent, the anti-oxidant and the catalyst into the grinder to disperse, adding the curing agent to disperse, thereby obtaining anti-icing coating. The anti-icing coating is remarkably improved in hydrophobicity performance, is good in anti-ice effect on a power transmission line, and has surface-drying time, volume resistivity and dielectric strength, which meet standards.

The invention relates to a paper-base bamboo curtain manufacturing method and a product thereof, in particular to a nanometer tungsten oxide photocatalyst paper-base bamboo curtain manufacturing method and a product thereof. The method sequentially comprises the following steps that (1), ammonium tungstate solutions are heated under 50-80 DEG C and then are cooled, then ethyl alcohol is added into the ammonium tungstate solutions to form a first latex solution, then cationic surface active agents are added to protect colloid, and mechanical mixing dissolving and refining are used for obtaining a second latex solution; (2) paper-base fibers and a bamboo curtain are combined to obtain a paper-base bamboo curtain; (3) the second latex solution obtained in the step (1) is sprayed to the paper-base bamboo curtain obtained through in the step (2) to form a film, and a nanometer tungsten oxide photocatalyst paper-base bamboo curtain is obtained. The parameters of the manufactured bamboo curtain are that each clearance is smaller than 0.35mm in average, the bonding strength is larger than 0.20Mpa, formaldehyde emission is smaller than 0.5mg/L, antibacterial property is higher than 70%, and water content is 7-13%. According to the nanometer tungsten oxide photocatalyst paper-base bamboo curtain, tungsten oxide content in the paper-base bamboo curtain has good function effect in optic self-catalytic degradation Voc, deodorization, antibiosis and sterilization and the like, and cost can be lowered.

The invention relates to the technical field of nano-grade material and microstructure, and discloses a method for uniformly growing a nanostructured material on a uniform chemically nickel-plated silicon microchannel substrate structure. The method comprises the following steps: silicon microchannels with a needed shape and separated from a silicon substrate are cut with laser; a uniform nickel conductive layer is grown on the surfaces of the microchannels with a chemical nickel-plating method; a nickel deposition time is adjusted, such that the resistance of the nickel-plated silicon microchannels is lower than 2ohm; a layer of nanostructure is grown on the surfaces of the nickel-plated microchannels with a hydrothermal method, wherein the nanostructure is composed of a composite metal oxide CoMoO4. According to the invention, the nanostructure is grown on the surfaces and insides of the nickel-plated silicon microchannels with micron-grade pore sizes with the hydrothermal method, such that the uniformity and stability of the structure are improved, and a problem of severe microchannel blockage caused by physically delivering materials to the inner sides of the microchannels is avoided. The material has good electrochemical activity, and has certain potential to be used in the field of new energy.

The invention provides a refining method of putty, which is characterized in that the method comprises the following steps: introducing putty which is already stirred into slurry into material feeding filtration devices of an extruder, an extruding pump, a diaphragm pump, a filter press, and a screw pump during packaging, wherein inlets and outlets of the devices are equipped with filter screens, removing various impurities included in the putty to allow the putty to become a product with particle purity; the method greatly improves the construction performance, decorative effect and water seepage resistance of the putty; and the technology has marvelous key effect in the preparation process.

The invention discloses a holmium metal iodate fluorescent material and a preparation method and applications thereof. The molecular formula of the compound is Ho(IO3)3, the space group is P21n, the parameters of unit cells comprise that a is equal to 8.7376 angstrom, b is equal to 5.9706 angstrom, c is equal to 15.0677 angstrom, alpha is equal to 90.000, beta is equal to 97.240, g is equal to 90.000, and Z is equal to 2; and the volume V of the unit cells is equal to 779.8(10) angstrom<3>. The material adopts hydrothermal reaction to obtain crystals; Ho<3+> fluorescence radiation intensity of the material can be enhanced through iodate ions; and the material is used for producing fluorescence radiation devices.

The invention discloses a dry powder granulation process for mica powder. The process includes the steps of: S1, putting mica powder into a crusher for crushing treatment, S2, preparation of mica powder screening equipment; S3, installation of an induced draft fan; S4, screening treatment of mica powder; S5, ball-milling treatment of the mica powder in S4 in a ball mill to obtain dry mica powder;and S6, granulation treatment on the dry mica powder by a dry powder roller granulator, thus obtaining dry mica powder granules. The dry powder granulation process for mica powder provided by the invention is simple in operation method, the prepared mica powder granules have high purity, and the production cost is low, therefore the process is suitable for popularization and use.

The invention provides a membrane technology based preparation method of a magnetic non-destructive testing material. The preparation method comprises following steps: A, a1: ferric chloride and ferrous chloride are dissolved into a mixed solution S1 prepared from demineralized water, wherein an amount ratio of Fe<3+> to Fe<2+> is 1:1-3:2; a2, sodium hydroxide and a dispersing agent are dissolved into a mixed solution S2 prepared from the demineralized water, and an amount ratio of sodium hydroxide to the dispersing agent is 1:0.002-1:0.01; B, the mixed solution S1 and the mixed solution S2 are enabled to penetrate through a PVDF (polyvinylidene fluoride) membrane under the action of a pump, mixed in a reactor and subjected to a reaction, and a crude product of the magnetic non-destructive testing nanomaterial is produced; C, the produced crude product is subjected to water bath crystallization and magnetic separation and repeatedly washed with deionized water until the pH value of eluate is 7, ultrasonic oscillation is performed, and after drying, the magnetic non-destructive testing nanomaterial is obtained.