116results about How to "Small particle diameter" patented technology

A method for producing a DDR type zeolite membrane, comprising immersing a porous substrate in a raw material solution containing 1-adamantanamine, silica, and water; and carrying out a hydrothermal synthesis of DDR type zeolite in the presence of a DDR type zeolite seed crystal (seed crystal) to form a DDR type zeolite membrane on the surface of the porous substrate by making a content ratio of 1-adamantanamine to silica (1-adamantanamine/silica) in the range of 0.002 to 0.4 in terms of molar ratio and a content ratio of water to silica (water/silica) in the range of 10 to 500 in terms of molar ratio, and an average particle diameter of the seed crystal to 300 nm or less to provide a method for producing stably a DDR type zeolite membrane of uniform and thin membrane thickness with high gas permeability.

The high transparency polyester film contains nano level silica of grain size 20-50 nm and micron level silica of grain size 1.2-2.0 microns. The nano level silica accounts for 50-2000 ppm of total polyester film weight, and the micron level silica 1-300 ppm. The production process of the high transparency polyester film includes the first preparation of silica suspension, the subsequent conventional polymer producing course to produce polyester slice, and final conventional melting extrusion of the slice and bi-directional stretching. The product of the present invention has high transparency, waterproof property, blocking property, heat resistance and antiaging property.

The present invention relates to a synthesizing method for a core-shell structure compound molecular sieve. The method mainly adopts a location growing method to fix a loaded phosphor aluminum or silicon aluminum molecular sieve on the surface of a ZSM-5 molecular sieve to compose the raw materials and then prepare a gel in a primarily wet state and crystallize under a constant temperature, thus synthesizing the core-shell structure compound molecular sieve. The method overcomes the defects of the prior technology, thus reducing the independent growing number of the composed phosphor aluminum or silicon aluminum molecular sieves, further improving the distribution of the phosphor aluminum or silicon aluminum molecular sieve of the shell on the surfaced of the ZSM-5 and reducing the grain diameter of the compound molecular sieve. When the core-shell structure compound molecular sieve prepared by the method is used for heavy oil catalytic cracking, the heavy oil converting rate and the low carbon olefin yield are all higher than the molecular sieve synthesized by the prior technology. Compared with the catalyst which only adopts the ZSM-5 molecular sieve as the active component, the heavy oil converting rate is improved by 2 to 3 percent; the ethylene yield is increased by 1 to 1.5 percent and the liquid gas yield is enhanced by 1.5 to 3.5 percent.

Disclosed are a nano-rare earth zirconate ceramic powder material for high-temperature thermal barrier coatings, and the preparation method, relating to a nano-rare earth zirconate ceramic powder material for high-temperature thermal barrier coatings, and the preparation method. The invention solves the problems that the existing ceramic materials for high-temperature thermal barrier coatings are of phase change failure, serious sintering, and too high thermal conductivity and mismatch with the matrix thermal expansion. The chemical formula of the nano-rare earth zirconate ceramic powder material for high-temperature thermal barrier coatings is Ln2Zr2O7, wherein, Ln is the combination of one or more rare earth elements among Gd, Sm, Nd or Yb. The preparation method is that rare earth oxide or soluble salt and zirconium salt containing rare earth oxides are used to respectively prepare the solution containing Ln3 + and the solution containing Zr4 +; the two solutions are mixed and added with surfactant under the ongoing mixing conditions; the mixed solution is dropped into precipitator to get sediment; after repeated washing, the sediment is dried, grinded and calcined. The invention can effectively protect high temperature alloy.

The invention discloses a method for directly preparing uniform alpha-type Fe2O3 nanoparticles/multilayer graphene composite material by using iron powder. Comprises the following steps: DMF and deionized water with volume ratio of 8: 2 are mixed as mixed solvent; Expanded graphite was added and treated with ultrasonic wave for 3 hours to obtain multilayer graphene mixed solution. Fe powder, dilute nitric acid and anhydrous sodium acetate are added into that mix solution; The solution is stirred in a water bath at 70-90 DEG C for 4-10 hours, cooled and centrifugally cleaned to collect black products; 3 time of centrifugal cleaning of that reactant with alcohol and water respectively, and drying in an oven at 60 DEG C for 12 hour to obtain the dried alpha-type Fe2O3 nanoparticle/multilayergraphene composite material of the invention. The invention has the advantages of simple process, wide material source, low cost, nano-sized alpha-type Fe2O3 particles, uniform particles and good dispersibility.

A stirrer is capable of finely dispersing or emulsifying well. A stirrer in which: the stirrer is provided with a rotating rotor equipped with multiple blades and a screen that is placed around the rotor and has multiple slits; the blade and the slits are provided at least with matching regions that are at the same position in the axial direction of the rotor rotation axis; and the fluid being processed is discharged outward from inside the screen as an intermittent jet flow through the slits as a result of the rotation of the rotor. The stirrer is characterized in that when the maximum external diameter of the rotor in the matching region is (D) (m), the rotation frequency of the rotor (2) is (N) (times/s), the number (12) is (X) and the number of slits (8) is (Y), the circumferential velocity (V) (m/s) of the rotor (2) rotation is represented by equation (1) and the frequency (Z) (kHz) of the intermittent jet flow is represented by equation (2)(V)=(D)×(π)×(N)(1)(Z)=(N)×(X)×(Y)/1000(2) and the circumferential velocity (V) is set to be 23 m/s<(V)<37 m/s and the frequency (Z) is set to be 35<(Z).

To provide a process for producing fine particles of crystalline oxide which have high crystallinity, are excellent in uniformity of the composition and particle diameter, and have a small particle diameter, and such fine particles of crystalline oxide.

A process for producing fine particles of crystalline oxide, which comprises:

a step of obtaining a melt containing an oxide of M (M is at least one member selected from the group consisting of Ce, Ti, Zr, Al, Fe, Zn, Mn, Cu, Co, Ni, Bi, Pb, In, Sn and rare earth elements (excluding Ce)) and B₂O₃,

a step of rapidly cooling the melt to form an amorphous material,

a step of pulverizing the amorphous material to obtain a pulverized material having a volume-based particle size distribution within a range of from 0.1 to 40 μm,

a step of heating the pulverized material to precipitate an oxide crystal containing M in the pulverized particles, and

a step of separating components other than the oxide crystal containing M from the crystal-precipitated particles to obtain fine particles of crystalline oxide containing M, in this order.

The invention belongs to the field of pulverized coal combustion and emission performance control, and particularly discloses a flameless graded oxygen-enriched low-NOx combustion method and system. The method comprises the following steps that smoke participating in circulation is divided into three paths, the fuel with the preset mass carried by a primary air pipeline, a secondary air pipeline and a tertiary air pipeline is introduced into a hearth through the primary air pipeline, the secondary air pipeline and the tertiary air pipeline to be combusted, wherein air outlets of the primary air pipeline and the secondary air pipeline are positioned in a main combustion area and an air outlet of the tertiary air pipeline is located in a re-combustion area, and the injection amounts and themass flows of oxygen in air in the air pipelines are controlled so as to control the peroxide coefficient range and the flow characteristic of the main combustion area and the re-combustion area so that a fuel staged oxygen-enriched combustion mode, a fuel-oxygen two-way staged oxygen-enriched combustion mode and a flameless oxygen-enriched combustion mode are achieved. The system comprises a boiler, a flue gas pretreatment module, a chimney, the primary air pipeline, the secondary air pipeline and the tertiary air pipeline. According to the invention, stable and efficient low NOx emission canbe achieved, the ignition characteristic of pulverized coal can be improved, and pulverized coal reburning is promoted.

A preparation method for a carbon encapsulated graphite/silicon oxide composite material comprises the following steps that: a uniform mixture of the graphite and silicate and/or silicon ester solution is contacted with acidoid so as to ensure that the uniform mixture forms sizing agent which is dried, products obtained by the sizing agent being dried are mixed with carbon matrix precursor solution, the mixture of products and carbon matrix precursor is dried and the dried solid is baked under the protect of inert gases. The carbon enclosed graphite/silicon oxide composite material made by the preparation method provided by the invention has excellent synthetical electrochemical properties. Compared with the composite material prepared by the prior art, the carbon enclosed graphite/silicon oxide composite material made by the preparation method obviously improves the specific capacity, the first efficiency for charge-discharge and the capacity conservation rate after the 20 times of circulation.

The invention discloses a preparation method of a zinc ion-porphyrin nanometer complex. The method comprises a step of mixing zinc ion source solutions with porphyrin source solutions in a micro-reactor and performing reaction to prepare the zinc ion-porphyrin nanometer complex. Compared with an existing preparation method using a reaction kettle, the preparation method is short in reaction time; the prepared particles are small in diameter, uniform in distribution and regular in arrangement.

The invention relates to a transparent medical PVC material suitable for wide-wave shading and a preparation method thereof. The PVC material is composed of, by weight, 100 parts of suspension-method PVC resin, 50-75 parts of plasticizers DEHP and TOTM, 1.0-2.0 parts of a Ca/Zn thermal stabilizer, 8-12 parts of an auxiliary thermal stabilizer, 0.5-1.0 part of a lubricant and 0.01-0.05 parts of a shading agent. The shading wave length range of the PVC material is increased to 220-550 nm and the light transmittance reaches not less than 0%. The PVC material solves the problems of narrow shading range (220-450 nm) and low light transmittance (less than 30%) which exist in the shading medical PVC materials in the prior art, thereby satisfying the higher clinical application demands in a shading transfusion device.

The invention provides a novel atomizing nozzle based on bubble cutting. The novel atomizing nozzle comprises an internal assembly and an external assembly, wherein closed space formed by the internalassembly and the external assembly constitutes a mixing chamber of the nozzle, the internal assembly comprises an inner core and a bubble divider, the external assembly comprises a casing and a sprayhead, a first air inlet hole is formed in the top of the inner core, an external thread is formed at the upper part of the inner core below the first air inlet hole, multiple second air inlet holes are formed in the inner core below the external thread, and swirling grooves are formed in the inner core located below the second air inlet holes; the casing is a hollow opening round tube, an internal thread at the upper part of the casing is tightly connected with the external thread on the inner core through a sealing structure, a liquid inlet hole is formed in the side surface of the casing, and an external thread is formed at the lower part of the casing; an internal thread is formed at the upper part of the spray head, a spray hole is formed in the central position of the closed end of the spray head, the bubble divider is mounted in a hollow cavity in the lower part of the casing, and the casing and the bubble divider are tightly connected with the spray head through a sealing structure. The novel atomizing nozzle has higher atomizing quality, and the average diameter of particles is smaller and more uniform.

The invention belongs to the technical field of agricultural equipment, and particularly relates to a light-controlled water-fertilizer integrated intelligent irrigation system for vegetable cultivation. The light-controlled water-fertilizer integrated intelligent irrigation system comprises a drip irrigation main pipe, a branch pipe, a return pipe, a water wheel chamber, a water wheel, a crushingbucket, a filter screen, a crushing knife, a hopper, a feeding tube, an electronic scale and a solenoid valve. The water wheel chamber is formed above the drip irrigation main pipe, and the branch pipe is communicated to the tangential direction of the side face of the water wheel chamber. The other end of the branch pipe is communicated with the drip irrigation main pipe. The bottom of the waterwheel chamber is communicated with the drip irrigation main pipe through the return pipe. The water wheel is rotatably connected into the water wheel chamber. The crushing bucket is fixedly connectedabove the water wheel chamber. The crushing knife is rotatably connected into the crushing bucket. The electronic scale is fixedly connected above the crushing bucket through a support. The hopper isarranged above the electronic scale. The water wheel and the crushing knife in the water wheel chamber are pushed to rotate through water flows, fertilizer is crushed and mixed by the rotating crushing knife in the crushing bucket before flowing into the water wheel chamber, the particle diameter of the mixed fertilizer is reduced, and the dissolution speed of the fertilizer in the water wheel chamber is increased.

The invention relates to the technical field of material synthesis and discloses a preparation method of a transition metal nano-boride. The preparation method comprises the following specific steps of: mixing a transition metal halide with a reducing agent I and a reducing agent II in a protective atmosphere of inert gas; placing an obtained mixture into a ball milling tank, and performing ball milling in the protective atmosphere of the inert gas; and removing the metal halide in a product of ball milling to get the transition metal nano-boride. The preparation method disclosed by the invention has the advantages of overcoming the shortcomings of high energy consumption, complex process and the like of the traditional preparation method, realizing mild reaction conditions and short reaction period, being capable of generating the product with a nano-structure, enabling the purity of the reaction product to be high and simultaneously precisely controlling the particle size of the product.

A toner includes a base toner that contains a binder resin, a colorant, and a wax. The base toner includes at least one endothermic peak specific to the wax in a range of 60 to 100° C., and a total endothermic of not less than 2 mJ/g. The base toner meets a condition expressed by (σ/M)×100≦23 where M is an average particle diameter and σ is a standard deviation of a first population of particle diameters after toner particles having diameters smaller than a certain value have been removed from a second population of the particle diameters, the certain value lying on a smaller side of an average particle diameter of the second population. The toner has a flow-ability of not smaller than 60%. The base toner is blended with at least 0.3 weight parts of a first external additive and at least 0.3 weight parts of a second external additive.

The invention relates to a silver-loaded chitosan/polyvinyl alcohol micro-ribbon and a preparation method and application thereof. The micro-ribbon is a chitosan/polyvinyl alcohol ribbon-shaped composite fiber film on which silver nanoparticles are uniformly distributed; the micro-ribbon has a diameter of 0.3 to 2mum; the silver nanoparticles have a particle size of 5 to 60nm. After polyvinyl alcohol solution and lactic acid solution of chitosan are mixed, ethyl alcohol is added; after the mixture is uniformly stirred, silver nitrate is added; stirring is carried out in a mode of keeping out of the sun for 40 to 50h to prepare spinning solution; then electrostatic spinning is carried out to obtain the silver-loaded chitosan/polyvinyl alcohol micro-ribbon. The micro-ribbon disclosed by the invention has the advantages of one-dimensional and two-dimensional nano materials, has a higher specific surface area, porosity and water absorption; the nano particles are attached or embedded into the micro-ribbon; phenomena of falling, aggregation and the like of nano silver are effectively reduced; the formed nano silver is more uniformly distributed in the micro ribbon; a fatality rate of the micro-ribbon for escherichia coli is 100%.

The invention provides a synthesis method for spherical nano-silver particles and the spherical nano-silver particles. The synthesis method for the spherical nano-silver particles comprises the steps that lemon grass extracts are prepared, the lemon grass extracts and water are evenly mixed for obtaining a lemon grass extracting solution, and the pH value of the lemon grass extracting solution is regulated to be alkaline; a soluble silver slat solution and a starch solution are prepared and evenly mixed for obtaining a silver salt mixed solution; and alkaline the lemon grass extracting solution and the silver salt mixed solution are evenly mixed and react at a set temperature for a set period of time, so that a solution containing the spherical nano-silver particles is obtained. According to the synthesis method for the spherical nano-silver particles and the spherical nano-silver particles, the problems that according to an existing synthesis method for spherical nano-silver particles, pollution can be caused, and the environmental friendliness requirement cannot be met can be solved; and in addition, the synthesis cost is low, the synthesized spherical nano-silver particles are small in diameter and high in antibacterial ability.

The invention discloses a fine crusher and relates to the technical field of grinding equipment. The fine crusher comprises a slurry box, a primary pressurizing device, a secondary pressurizing device, an oil pressure control device, a collision generation device, a cooling device and a collection device. The primary pressurizing device communicates with secondary pressurizing device through a first pipeline, the slurry box is located on the side, away from the secondary pressurizing device, of the first pipeline, the oil pressure control device is connected with a secondary pressurizing device pipeline, the secondary pressurizing device communicates with an inlet of a collision generation device pipeline through a second pipeline, the collection device is connected with an outlet pipelineof the collision generation device, and the cooling device can lower the temperature in the collision generation device. According to the fine crusher, through pressure increase and collision modes,particulate matter is further smashed, and accordingly the size of the particulate matter is reduced.

Provided are a poly alkylsilsesquioxane fine particle having hydrophobicity and having a small particle diameter, an external additive for toner and a dry toner for electrophotography each using the same, and a method of manufacturing a hydrophobized spherical polyalkylsilsesquioxane fine particle. The hydrophobized spherical poly alkylsilsesquioxane fine particle has a mass-based median diameter in a centrifugal sedimentation method within the range of from 0.05 μm to 0.3 μm. The fine particle is produced through, for example, at least a process involving: mixing a raw material solution prepared using an alkyl trialkoxysilane with an alkaline aqueous medium to obtain a polycondensation reaction liquid; mixing the polycondensation reaction liquid with an aqueous solution to obtain a fine particle dispersion liquid; and blending a hydrophobizing agent in the fine particle dispersion liquid.

The invention discloses a nonmetal-ion-doped perovskite type mixed conductor hydrogen permeation membrane, and a preparation method and an application of same. The chemical general formula of the perovskite type mixed conductor hydrogen permeation membrane is AB<1-x>MxO<3-delta>, wherein A is one of Sr, Ba and Ca, B is one of Ce and Zr, M is one of nonmetal elements P and S and the delta refers tonon-stoichiometry, 0 <= delta <= 0.5 and 0 <= x <= 0.5. The material can be prepared through a glycine-nitrate combustion process. The electronic conductivity of the membrane is enhanced by doping the nonmetal ions, and further the hydrogen permeation capacity is increased. The material, in a hydrogen-containing atmosphere, has excellent separation performance and can be used for separating hydrogen from a hydrogen-containing gas mixture.

The invention relates to an inorganic-organic hybrid compound as an ion compound, composed of an inorganic cation and an organic anion active substance and optionally, an organic anion fluorescent dye.

The present invention discloses a toner including a mother toner having an average circularityof from 0.93 to 0.99, and including amodif ied polyester resin and a colorant; and an external additive in an amount of from 0.3 to 5.0 parts by weight per 100 parts by weight of the mother toner, wherein the toner has a melting viscosity of from 70 to 140 Pa.s at 160 DEG C, a weight-average particle diameter of from 3 to 7 mu m, a ratio thereof to a number-average particle diameter of from 1.91 to 1.25, particles having a diameter of 4 mu m or less being present in an amount less than 10 % by number or particles having a diameter of 8 mu m or more being present in an amount less than 2 % by volume.

The invention belongs to the field of precursor preparation, and particularly relates to a ternary material precursor. The precursor is characterized in that the microstructure of the precursor is a three-dimensional flower-like structure assembled by nanosheets with specific thickness. The precursor is prepared by adopting the steps of (1) dissolving a surfactant into deionized water, and conducting magnetic stirring until uniform mixing to obtain a solution A, (2) adding nickel salt, cobalt salt and manganese salt into the solution A in the step (1) according to a stoichiometric ratio, conducting magnetic stirring for 1-2 hours to obtain a solutions B, putting the solution B into a 50ml polytetrafluoroethylene lining with the filling degree of 80%, putting the polytetrafluoroethylene lining into a stainless steel hydrothermal kettle, reacting, and filtering to obtain a precipitate; and (3) washing the precipitate obtained in the step (2) with ethanol, and carrying out drying treatment in a constant-temperature blast drying oven so as to obtain a precursor with a three-dimensional flower-like structure microstructure. The precursor is small in distribution difference, the specificsurface area is increased, the migration path and rate are improved, and the rate capability of the material is improved.