313results about How to "Uniform preparation" patented technology

To provide a mixing device which prevents generation of lumps and undissolved powder in mixing the powder and liquid, and can continuously mix them and uniformly at a desired concentration, and to provide a method therefor. The constant quantity of powder 10 is fallen continuously by gravity into the central part of a cylindrical vessel 1 and the falling powder is mixed with the injection-flow liquid by injecting the liquid from an injection opening 12 installed along the peripheral direction of the lower cylindrical part 4 of the cylindrical vessel 1.

The invention discloses a process and equipment for preparing a nanoparticle-reinforced metal matrix composite material. The process comprises the following steps of: mixing reinforcing nanoparticles with matrix metals and a grain growth inhibitor in a stirring ball mill together, and then loading the mixture into a steel pipe; casting the mixture together with the matrix metals in a water cooling crystallizer or casting and forming the mixture together with a molten metal in a casting mould; and performing quick solidification and crystallization after electromagnetic stirring and ultrasonic vibration to ensure that the two phase materials achieve complete metallurgical bonding, wherein because of the electromagnetic stirring and the ultrasonic vibration, the two phase materials are mixed more uniformly, and all properties of the composite material can be further improved. by using the process and the equipment, a production process is simple, the cost is low, the efficiency is high, the product performance is high, the process is easy to control, the external dimensions of products are not limited by the process, and large-sized nanoparticle-reinforced metal matrix composite materials can be manufactured.

The invention discloses a large-sized hollow cylindrical sampler for coarse grained soil and a use method thereof. The sampler comprises an annular sleeve and a vibrating compacter, two parts in all, wherein the annular sleeve comprises an annular base (1), an annular outer sleeve (2), an annular inner sleeve (3) and an annular extension barrel (4); and the vibrating compacter comprises a vibrating motor (7), a circular iron plate (12), a dowel bar (6), a positioner (8) and an annular iron plate (5). While using the instrument, a soil sample (9) is paved at first and then put into the annulariron plate (5); next, the vibrating motor (7) is turned on; when the edge of the annular outer sleeve (2) is level with the positioner (8), the vibrating motor (7) stops vibration and the next layer of soil sample (9) is added; and then vibration compaction is performed until the soil samples reach a predetermined height. The sampler is simple to use, convenient for operation and control, and capable of preparing a highly compact and even test sample, so that the time and labour for preparing the test sample are saved.

The present invention relates to a method of preparing silver nanowires having a diameter of less than 100 nm and a length of 10 μm or more, and, more particularly, to a method of uniformly preparing silver nanowires having a high aspect ratio using an ionic liquid as an additive in addition to a silver salt precursor, a reducing solvent and a capping agent in a polyol process. When the technology of the present invention is used, silver nanowires having a diameter of less than 100 nm and a length of 10 μm or more can be uniformly prepared. Further, when a transparent conductive film is formed by applying a silver nanowire-dispersed solution onto a base film, the transparent conductive film has a surface resistivity of 10¹˜10³Ω/□ and a light transmittance of 90% or more to the base film.

A method for treating skin tissues, the skin tissues defining an epidermal layer and a sub-epidermal layer, the epidermal layer defining a skin surface and the sub-epidermal layer extending from the epidermal layer substantially opposite to the skin surface, the method comprising: positioning a radiation source outside of the skin tissues at a predetermined distance from the skin surface; powering the radiation source so as to produce infrared radiation having a predetermined spectrum and a predetermined power; and irradiating the sub-epidermal layer with the infrared radiation through the epidermal layer, the predetermined spectrum and the predetermined power being such that the infrared radiation is absorbed to a larger degree in the sub-epidermal layer than in the epidermal layer.

The invention discloses environment-friendly straw feed manufacturing equipment. The equipment comprises a feeding pipe, a box body, an electric telescopic rod, a camera, a stir-frying knife, a pressing plate, an air blower, a crushing box, a heater, a drying box and a rotary conical roller, wherein the feeding pipe is arranged on the top of the box body, the electric telescopic rod is arranged on the top of the box body, and the pressing plate is arranged at the bottom of the electric telescopic rod; a cutter is arranged on the lower surface of the pressing plate, a rotating shaft is arranged in the box body, and the stir-frying knife is arranged at the bottom of the rotating shaft; a pressure bearing plate is arranged in the box body, a cam is arranged at the bottom of the pressure bearing plate, and a timer is arranged on the outer wall of the box body; the top of the box body is communicated with the air blower, an inclined guide plate is arranged below the pressure bearing plate, and the crushing box is arranged at the outlet end of the inclined guide plate; the bottom of the crushing box is connected with the drying box, and a discharging pipe is arranged at the bottom of the drying box. The equipment guarantees reasonable utilization of straw, straw feed particles can be conveniently stored, the breeding feed cost is reduced, and the equipment is simple in structure, convenient to use and easy to popularize.

The invention discloses a method for preparing an interactive laminar modeling material test piece. The method comprises the following steps of: A, preparing a modeling material: (1) preparing a material a, namely placing loess and barite powder in a stirrer, uniformly stirring the materials and adding water into the mixture to obtain a plastic mixed material a; (2) preparing a material b, namely placing cement and loess into the stirrer, uniformly stirring the materials and adding water into the mixture to obtain the plastic mixed material b; B, assembling detachable boxes; C, pre-pressing: placing the prepared material a and material b in the boxes, arranging pressing plates on the boxes respectively and placing the boxes on an MTS pressure tester for pressing; D, slicing; E, adsorbing, translating and superposing; F, repairing and repressing; G, solidifying; and H, machining the test piece: manufacturing the interactive laminar standard test pieces with different bed inclinations. The method has the advantages of simple and definite process flow, high efficiency, reduction in manufacturing period, high reliability, uniform manufacturing of thin modeling material layer at each layer, broad application prospect and obvious economic benefit.

The present invention relates to an apparatus for producing a nitride semiconductor by crystal-growing the nitride semiconductor on a substrate by diffusing a gas containing a source gas of group III element and a source gas of group V element. The gas is diffused in parallel with the substrate and from upstream to downstream. The apparatus has the substrate housed in the apparatus and a flow channel for allowing the gas to flow in the flow channel. The apparatus also has a plurality of protrusions provided on an inner wall of the flow channel. A partition for causing the source gas of group III element and the source gas of group V element to be introduced separately into the flow channel is provided on the upstream portion of the flow channel and in a horizontal direction. The protrusions are formed on the upper and lower surfaces of the partition. With this structure, the source gas of group III element and the source gas of group V element are more uniformly mixed before the source gases are supplied.

The invention provides a novel method for preparing an A-type molecular sieve membrane, which adopts preparation of the molecular sieve membrane in a flow system. The method comprises the following steps: a silicon source, an aluminum source, an alkali source and deionized water are prepared into precursor sol of A-type molecular sieve according to certain proportion first; a vector membrane tube which is precoated with A-type molecular sieve crystal seeds is fixed inside a synthesis reactor; the molecular sieve precursor sol which is heated to a given temperature is conveyed into the synthesis reactor through a slurry pump, and the precursor sol is driven to flow and circulate on the surface of an outer membrane of the vector membrane tube; and the A-type molecular sieve membrane can be obtained after flowing, circulating and crystallization for a definite time at the given temperature. The preparation method provided by the invention has the advantages that the preparation method can basically solve the problem of concentration gradient during the synthetic process of he molecular sieve, is favorable to the preparation of the uniform, continuous and compact molecular sieve membrane with superior separation performance, and is particularly suitable for preparing the molecular sieve membrane for industrial application.

The invention discloses a preparation method of a rapid prototyping material. The preparation method comprises the steps of providing raw materials, wherein raw materials comprise the following ingredients in parts by weight: 85-97.5 parts of engineering plastics, 0.5-5 parts of nanocellulose and 2-10 parts of viscosity reducer; (S1100) weighing the raw materials: drying the raw materials for 4-10 hours at the temperature of 105 DEG C, and then, weighing the raw materials according to a weight ratio; (S1200) carrying out blending modification: carrying out three-dimensional stirring and blending on the weighed raw materials for 30-90 min; and (S1300) sieving: sieving the blended raw materials by using a sieve of 70-140 meshes. The invention further discloses the rapid prototyping material obtained through the preparation method. According to the rapid prototyping material disclosed by the invention, the preparation process is simple, and the industrialization is easy to realize; and the material is short in prototyping cycle, good in thermal stability and high in mechanical strength.

The invention provides a graphene foam aluminum composite metal material and a preparing method. The preparing method comprises the following steps that a foaming agent and graphene are evenly dispersed by grinding and then mixed with aluminum metal powder; and the foaming agent is uniformly decomposed and releases gas through laser sintering, so that aluminum alloy is in a foam state by expanding of the gas, graphene is dispersed on the interface of the foam, and then the graphene foam aluminum composite metal material is obtained after cooling; the metal aluminum foaming process and the graphene strengthening process are conducted at the same time, so that the technical defects that the performance is not stable and the strengthening effect is not ideal of graphene foam aluminum composite material prepared through an existing method are overcome; the graphene foam aluminum composite metal material with characteristics of being stable, uniform, low in density and high in strength is prepared; and the prepared graphene foam aluminum composite metal material is stable in property, easy to store and convey and realize large-scale industrial production.

The invention belongs to the field of lithium ion batteries, and provides a cathode material Li delta Co(1-x)MgxO2@AlF3 of a lithium ion battery and a preparation method of the cathode material. According to the cathode material Li delta Co(1-x)MgxO2@AlF3, delta is larger than or equal to 1 and smaller than or equal to 1.05, x is larger than 0 and smaller than or equal to 0.05, and the defect of poor electrochemical performance of laminar LiCoO2 under high potential is overcome. The bulk-phase doping modification and surface coating combined laminar cathode material Li delta Co(1-x)MgxO2@AlF3 has higher specific discharge capacity and very stable circulation performance; at the room temperature, at 0.5 C rate and within the charge-discharge voltage range of 2.75-4.4 V (vs.Li/Li<+>), the first specific discharge capacity can reach 187.6 mAh/g, the 3.8V platform capacity approaches 100%, the capacity can reach 180 mAh/g after 30 times of circulation, and the capacity retention ratio is 96%. Besides, the provided material preparation method adopts a simple preparation process, the preparation cost is low, and large-scale industrial production is easy to realize.

The invention relates to a method for preparing a nano material with large thickness and area through acute plastic deformation. The method comprises the following steps: adopting carrying current acute stirring friction forced highly undercooled control technology under the action of electromagnetic vibration in-situ compound electromagnetic field to prepare a metallic nano grain material and a ultrafine grain material with large thickness and area; adopting an electromagnetic vibration coil to ensure that a stirring head carries out high-speed stirring and electromagnetic vibration stirring friction composite motion combined with electromagnetic vibration at a certain frequency; and forming an alternating electromagnetic field of a certain intensity inside a workpiece. Under the joint action of carrying current stirring friction and a forced highly undercooled control temperature mechanism, coarse grain structure of the metal surface in a certain thickness undergoes acute plastic deformation and breaks to form stable nano grain and ultrafine grain structure; thus, the method realizes the preparation or surface modification of the metallic nano material with large thickness and area and uniform structure, and can also be used in stirring friction welding.

The invention belongs to the technical field of grinding wheel preparation and particularly relates to a method for preparing a grinding wheel according to a wet method. The method comprises the following steps: respectively adding powder glue, water, starch, binder, foaming agent and curing agent in proportion at different time, and then controlling the stirring speed, temperature and pouring speed in different preparing steps. The method provided by the invention has the advantages of simple technology and production equipment; the prepared grinding wheel is uniform in pore size and distribution; the mechanical strength, the abrasive resistance and the grinding property of the grinding wheel are greatly increased; and especially, the maximum porosity can reach 75%.

The invention relates to a method for forced uniform solidified continuous preparing metal slurry, comprising that (1) melting overheat metal with the temperature more than the liquidus temperature about 0-100deg.C is poured into upper guide flow pipe; (2) the liquid metal flows into the melting deconcentrator and the liquid metal is injected on the inner round wall of melting deconcentrator; the temperature control system out of pulping room make the wall temperature of pulping room be controlled lower than the liquidus temperature about 0-100deg.C; the liquid metal is collected at the cone bottom to obtain the metal slurry with solid fraction smaller than 30%; the metal slurry flows out through the lower guide flow pipe and the temperature is controlled in -10-10deg.C of liquidus temperature; (3) the metal slurry flows into the collector or is sent into the common equipment such as die-casting, rolling and forging so on directly to carry rheological forming out and or is cast into the mould continuously to produce semi-solid continuous casting slab. The merit of invention is that the preparation of metal slurry is uniform, mass and continuous, and it can satisfy the demand of huge industrial production easily.

The invention provides a separation method of graphene oxide different in sizes in a graphene oxide preparation process, and relates to graphene oxide preparation. According to the separation method, graphene oxide prepared by using an oxidation reduction method is separated according to difference of dispersibility of the graphene oxide different in sizes in a solvent so as to obtain the following graphene oxide different in sizes: precipitates B-COSs1 which are graphene oxide products, the sizes of which are greater than 25 micrometers, precipitates GOSs2 which are graphene oxide products, the sizes of which are greater than 15 micrometers and are less than or equal to 25 micrometers, precipitates GOSs3 which are graphene oxide products, the sizes of which are greater than 5 micrometers and less than or equal to 15 micrometers, and precipitates F-COSs4 which are graphene oxide products, the sizes of which are less than or equal to 5 micrometers. The separation method can be used for overcoming the defects that the graphene oxide products which are prepared by using the conventional various oxidation reduction methods and different in sizes are completely mixed and irregular in distribution.

The invention relates to a method for continuous and rapid preparation of nano nickel by the microfluidics technology and belongs to the technical field of synthesis of nanomaterial by microfluidics and microreactor technology. The method includes: dissolving NiS04.6H21 into distilled water, regulating PH (power of Hydrogen) of a solution, adding a surfactant, and mixing well for configuration to obtain a nickel salt mixed solution; dissolving a reducing agent into the distilled water for configuration to obtain a reducing solution; pumping the nickel salt mixed solution and the reducing solution obtained in the above steps into a Y-shaped microreactor channel for micro-mixing reaction, and subjecting the mixed solution to cleaning, separating and vacuum low-temperature drying treatment to obtain black nickel nanoparticles. The method has the advantages of being high in mixed mass transfer rate, even in reaction, continuously stable and the like by combining the microfluidics technology; featuring in wet reduction, the nano nickel is subjected to micro-mixing in the Y-shaped microreactor channel, so that the continuous and rapid preparation of the nano nickel is realized.

The invention relates to a preparation method of large-dimension graphene oxide. The method comprises the following steps of using graphite paper as an anode; using a platinum sheet as a cathode; performing electrochemical pretreatment in electrolyte; performing intercalation on an anode material; peeling graphite; adding the materials into a mixed solution of an oxidizing agent and acid for oxidization reaction; peeling the graphene oxide under the oscillator oscillation or magnetic power stirring conditions, so that the multilayer graphene oxides are peeled into single-layer and few-layer graphene oxides and are dispersed into deionized water to form large-dimension graphene oxide dispersion liquid; performing centrifugal separation to obtain graphene oxide slurry; performing freeze drying treatment to obtain large-dimension graphene oxide powder. The invention also provides the large-dimension graphene oxide obtained by the preparation method. The electrochemical intercalation graphene is used as raw materials to perform oxidization reaction to realize the fast oxidization on the graphene; through natural settling cleaning and mild mechanical peeling, the fast peeling on the large-dimension graphene oxide is realized; the characteristics of high efficiency, high yield and low cost are achieved.

The invention relates to a full-automatic tester for a slump degree of cement concrete. The full-automatic tester comprises an environmental box, as well as a slump degree cylinder, a scraping apparatus and an inserting and pounding apparatus which are successively arranged in the environmental box from bottom to top, wherein the slump degree cylinder is connected with a vertical traction apparatus; the scraping apparatus is provided with a through hole capable of being communicated with the upper end of the slump degree cylinder, and the scraping apparatus is connected with the horizontal traction apparatus; the lower end of the inserting and pounding apparatus can stretch into the slump degree cylinder, and the upper end of the inserting and pounding apparatus is connected with a liftingapparatus; a feeding apparatus for feeding materials into the slump degree cylinder is also arranged above the slump degree cylinder; the vertical traction apparatus, the horizontal traction apparatus and the lifting apparatus are respectively connected with a power apparatus, and the power apparatus is connected with a controller; and a measurement apparatus for acquiring a slump degree of cement concrete is also installed in the environmental box. By adopting the full-automatic tester for the slump degree of the cement concrete, the accuracy of a test result can be ensured, the automatic operation can be realized, the experiment continuity is good, and the accuracy and reality of a measured result are good.

The invention relates to a preparation method of an electrochromic intelligent fiber. The preparation method of the electrochromic intelligent fiber comprises the following steps: dissolving 3,4-ethylenedioxythiophene in lithium perchlorate propylene carbonate solution to obtain a deposition solution, then vertically placing a stainless steel fiber subjected to ultrasonic washing into the deposition solution for carrying out electrolytic deposition, performing vacuum drying, so that the stainless steel fiber coated with poly(3,4-ethylenedioxythiophene) (PEDOT) is obtained; dipping gel electrolyte on the stainless steel fibers coated with PEDOT, drying at room temperature, then winding another stainless steel fiber on the stainless steel fiber dipped with the gel electrolyte, dipping the gel electrolyte again, and drying at room temperature, so that the electrochromic intelligent fiber is obtained. The preparation method of the electrochromic intelligent fiber is simple, low in cost and applicable to large-scale production; the prepared electrochromic intelligent fiber has good optical property, high transformation speed, good flexibility and obvious gradient effect.