23results about How to "Particle size adjustable" patented technology

The invention belongs to the technical field of water treatment materials, and particularly relates to a coal gasification slag unfired ceramsite filter material as well as a preparation method and application thereof. The coal gasification slag thermal insulation material comprises the following raw materials in parts by weight: 67.5-95 parts of coal gasification slag, 5-15 parts of active powder, 0-20 parts of metakaolin, 2-8 parts of expanded perlite, 0.1-0.5 part of a foam stabilizer and 1-3 parts of a foaming agent. The unfired ceramsite filter material has the advantages of being reusable, green and environment-friendly in preparation process, low in follow-up treatment cost, capable of being reused after failure and the like.

The invention belongs to the technical field of sodium ion batteries, and particularly relates to a large-scale safe preparation method of a sodium ion positive electrode material assisted by a water reducing agent. The preparation method comprises the following steps: putting a sodium source into a water reducing agent, then adding deionized water, finally adding an iron source, a phosphorus source and a carbon source into the mixed solution, and repeatedly grinding to obtain a homogeneous solution; drying the homogeneous solution to obtain a precursor; and carrying out staged sintering treatment on the precursor to finally obtain the NaxFex-1 (PO4) x-2P2O7 / C powder. The Na4Fe3 (PO4) 2P2O7 / C can be prepared in batches by limiting the types and process parameters of the sodium source, the iron source, the phosphorus source and the carbon source, and the reversible capacity of the obtained Na4Fe3 (PO4) 2P2O7 / C under the multiplying power of 0.2 C can reach up to 110 mAh. G <-1 >.

The invention belongs to the field of semiconductor materials, and discloses gallium oxide and a synthesis method thereof. The synthesis method comprises the following steps: introducing ammonia water into a gallium nitrate solution, and continuously stirring to obtain a white turbid liquid; aging the white turbid liquid, filtering and washing to obtain an intermediate product; and calcining the intermediate product to obtain solid particles which are gallium oxide. According to the synthesis method, gallium nitrate and ammonia water are used as core raw materials, additional additives and complex precursors are not needed, the impurity introduction risk can be greatly reduced, and the high purity of the product can be guaranteed by combining washing and calcining procedures; meanwhile, the process steps are simple, the operation conditions are mild and controllable, expensive special equipment is not needed, the production cost is low, the method is suitable for large-scale production, and a gallium oxide product with good dispersity and high crystallinity can be obtained after a precursor prepared through a precipitation method is calcined and crushed.

The invention discloses an Al / PDA / CuZnO2 / AP composite energetic material, which is characterized in that PDA is used as an interface bonding layer to enable Al powder to be in close contact with a bimetallic catalyst CuZnO2 and AP, nano-particles CuZnO2 are uniformly attached to the PDA modified Al powder, and the Al powder, the CuZnO2 and the AP are directionally arranged and self-assembled to form an energetic micro-unit with Al / PDA / CuZnO2 as a core and AP as a shell layer. According to the preparation method of the composite energetic material, a mixed solvent is selected as a crystallization solvent, the Al / PDA / CuZnO2 / AP composite energetic material with the controllable particle size is prepared through a cooling recrystallization method, the grading requirement of a composite solid propellant is met, the metal combustion agent, the catalyst and the oxidizing agent are tightly combined, the reaction diffusion distance of the metal combustion agent, the catalyst and the oxidizing agent is shortened, and therefore the particle size controllable Al / PDA / CuZnO2 / AP composite energetic material is obtained. The synergistic energy release effect is improved, and the energy performance of the composite solid propellant is expected to be enhanced. The preparation method is simple and easy to operate, the crystallization solvent can be recycled for multiple times, and the preparation method has the characteristics of environmental protection and high economic benefit and is beneficial to industrial large-scale production.

The present invention discloses a liquid metal powder, comprising a liquid metal and a carbide formed on its surface, wherein the raw material of the carbide is anhydrous ethanol, and the mass ratio of the anhydrous ethanol to the liquid metal is 10:90-98:2. The powder has good dispersion stability and can effectively prevent the oxidation of the liquid metal. The present invention also provides a method for preparing a magnetic liquid metal powder, comprising adding anhydrous ethanol and a liquid metal to containers A and B respectively, and continuously introducing an inert gas; adding the anhydrous ethanol in container A to container B, wherein the mass ratio of the anhydrous ethanol to the liquid metal is 10:90-98:2, adjusting the pressure of container B to 0.1-0.2MPa, and heating and stirring container B to obtain a magnetic liquid metal powder. The preparation method is simple and efficient.

The utility model discloses a kind of multi-particle size adjustable medicinal excipient granulator, including granulating cylinder, fixedly connected with fixed granulating net in the side edge opening of granulating cylinder, the inside of the lateral wall of granulating cylinder is equipped with receiving groove, two layers of movable granulating net are slidably connected with the inside receiving of receiving groove, the surface of granulating cylinder is provided with limit sliding slot below movable granulating net, the above of granulating cylinder is equipped with feeding cylinder;The utility model is by being provided with fixed granulating net and two layers of movable granulating net in the side edge of granulating cylinder, the size of aperture is continuously regulated using the overlapping cooperation of movable granulating net and fixed granulating net, and multiple-particle size requirement can be flexibly adapted.The design breaks through the limitation of traditional single screen mesh corresponding single particle size, reaches adjustable particle size by pure mechanical structure, does not need to replace granulating net during shutdown, significantly improves regulation efficiency and production continuity.

The preparation method comprises the following steps: firstly, adding ethylene glycol into deionized water at room temperature, uniformly stirring to obtain an ethylene glycol aqueous solution, adding polyacrylamide into the ethylene glycol aqueous solution, continuously stirring and dissolving to obtain a premixed solution, adding tetraethoxysilane into the premixed solution, and uniformly stirring to obtain the amorphous silicon dioxide microspheres with uniform sizes. And carrying out solid-liquid separation after stirring reaction, washing and drying a solid product to obtain white powder, and carrying out heat treatment and cooling on the white powder to obtain the product. Compared with the prior art, the method has the advantages that amorphous silicon dioxide microsphere materials with different sizes, smooth surfaces, high purity and uniform particle sizes can be prepared, and the method is simple in process step, low in raw material price, suitable for industrialization and wide in application prospect.

The invention belongs to the field of biomedical dressings, and discloses core-shell structure particles for promoting wound healing and application of the core-shell structure particles. The core-shell structure particles are obtained by taking a trehalose solution and a lucid ganoderma source chitosan solution as a core solution and a membrane casting solution respectively, carrying out air bath and coagulating bath in a pulse mode, and separating. The core-shell structure particles of some examples have relatively stable structures, can be stably dispersed in aqueous materials, and can be prepared into wound healing preparations in dosage forms, such as dressings, sprays, pastes and the like. The particle size of the core-shell structure particles is adjustable, so that the core-shell structure particles can go deep into the wound surface to realize better wound surface coverage and better promote wound surface healing. According to the core-shell structure particles of some examples, various repairing factors can be loaded in the shell, controlled release and slow release of the repairing factors can be achieved due to existence of the shell, and a better repairing effect is achieved.

The utility model discloses a granulating device for feed processing, and belongs to the technical field of feed processing equipment. A fixing plate is horizontally arranged in the shell, a rotating mechanism is arranged on the fixing plate, an extruding mechanism is arranged in the rotating mechanism and fixed to the shell, the outer wall of the rotating mechanism is used in cooperation with a grain cutting mechanism, the grain cutting mechanism is fixed to the shell, a filter screen plate is arranged below the grain cutting mechanism, and the filter screen plate is detachably fixed in the shell and obliquely arranged. A collecting box is arranged below the filter screen plate, and a waste opening is formed in the side wall of the shell and used in cooperation with the filter screen plate. Through the characteristics of high efficiency, adjustability, flexibility and easiness in maintenance, a convenient and efficient solution is provided for the feed processing industry, and the feed production quality and efficiency are favorably improved.

The invention relates to the technical field of immunomagnetic beads, in particular to octopus magnetic beads and a preparation method thereof. Comprising the following steps: 1, dissolving a block copolymer in an organic solvent to prepare a polymer solution with the concentration of 1-5wt%; 2, dispersing magnetic nanoparticles in the polymer solution obtained in the step 1, and carrying out ultrasonic treatment for 10-15 minutes by virtue of ultrasonic equipment, so that the magnetic nanoparticles are uniformly dispersed; 3, under the action of an emulsification mode, adding 5-15 mL of the polymer solution in the step 2 into 150-300 mL of the surfactant aqueous solution for emulsification treatment, and after emulsification, stirring until the solvent is completely volatilized to obtain a magnetic bead dispersion liquid; and 4, transferring the magnetic bead dispersion liquid into a centrifugal tube, centrifuging at a rotating speed, and cleaning with deionized water to obtain the octopus magnetic beads. The method has the advantages of being controllable in surface appearance, adjustable in chemical property, easy to prepare on a large scale, wide in industrial application prospect and the like.

The invention relates to the field of all-vanadium redox flow batteries, and discloses a composite graphite felt material and a preparation method thereof, and the composite graphite felt material can improve the battery performance of the all-vanadium redox flow battery. The method comprises the steps that magnesium salt and aluminum salt are dissolved in deionized water, and the molar ratio of Mg to Al in the solution ranges from 2: 1 to 4: 1; adding the prepared precipitant solution into the solution in which the magnesium salt and the aluminum salt are fully dissolved, and adjusting the pH value of the solution to 11-13 to obtain a precursor solution; the graphite felt is soaked in a dilute sulfuric acid solution for etching, impurities on the graphite felt are removed, and the etched graphite felt is dried for standby application; jointly transferring the precursor solution and the treated graphite felt into a hydrothermal reaction kettle, and putting the hydrothermal reaction kettle into a drying oven to react for 4-12 hours at the temperature of 60-180 DEG C; and cleaning the graphite felt material loaded with the catalyst material with deionized water, and drying in a drying oven.

The application belongs to the technical field of olefin polymerization, and discloses a fluorine aryl borate compound dispersion system, a preparation method and application thereof, the preparation method comprising the following steps: 1) dissolving the fluorine aryl borate compound in a good solvent to prepare a saturated solution; 2) under the action of stirring and ultrasonic, the saturated solution is added into a poor solvent, and after the addition is completed, the stirring and ultrasonic continue for 3-10 minutes; 3) the suspension obtained in the step 2) is filtered to obtain a solid, the solid is dried by blowing hot nitrogen gas under stirring, and then the solid is treated at high temperature under reduced pressure; 4) the solid obtained in the step 3) is dispersed in an alkane solvent to obtain the fluorine aryl borate compound dispersion system. The preparation method has low process cost, and the particle size of the fluorine aryl borate compound in the prepared dispersion system is adjustable and the purity is improved.

The invention provides a solid borate extreme pressure anti-wear additive with a controllable particle size and a preparation method of the solid borate extreme pressure anti-wear additive. According to the borate extreme pressure anti-wear additive disclosed by the invention, borate solid powder with different particle sizes can be produced according to different material proportions and drying conditions, so that specific performance requirements are met. The preparation method of the borate extreme pressure anti-wear additive comprises the following steps: (1) adding boric acid into a potassium hydroxide aqueous solution, and reacting at 50-100 DEG C for 1-2 hours; and (2) pumping the mixture in the step (1) into a drying device, and obtaining the borate extreme pressure anti-wear additive with controllable granularity under a certain drying condition. The borate extreme pressure anti-wear additive disclosed by the invention is better in anti-wear performance and smaller in influence on the structural stability of lubricating grease. In addition, the technological process is simple, the particle size of the borate solid is adjustable, and the application field of borate is enriched.

The invention discloses a silver-silicon dioxide spherical powder and its preparation method and application. The preparation method of the silver-silicon dioxide spherical powder of the present invention comprises the following steps: 1) preparing acidic silica sol; 2) mixing silver nitrate solution and acidic silica sol to prepare a solution to be atomized; 3) bonding a microporous metal film to a polarized annular piezoelectric ceramic sheet to obtain an atomizing sheet; 4) installing the atomizing sheet into an ultrasonic atomizer, and adding the solution to be atomized into a liquid storage tank of the ultrasonic atomizer, and then performing spray atomization and natural sedimentation to obtain a spherical gel; 5) heat treating the spherical gel. The silver-silicon dioxide spherical powder of the present invention has good sphericity, smooth surface, adjustable conductivity, and adjustable particle size in a wide range, and its preparation method is simple, the equipment requirements are low, and the production cost is low, which fully meets the application requirements of conductive silver paste for LTCC, and is suitable for large-scale application in the field of electronics industry.

The present application relates to the field of polyolefin catalysts, in particular to a Ziegler-Natta catalyst for olefin polymerization and in-situ grafting, and a preparation method and application thereof. The Ziegler-Natta catalyst comprises the following blending components and / or reaction products: a carrier, a titanium element source, a magnesium element source, an electron donor and a free radical initiator. The free radical initiator is introduced during the preparation process of the catalyst, the preparation process is relatively simple, the grafting of the polar monomer on the polyethylene is initiated, the grafting reaction is more uniform, the amount of the free radical initiator is less, the grafting efficiency is higher, and the gel content is lower; the particle size of the catalyst can be adjusted according to the use requirement, thereby the particle size of the polymer is controlled, and the grafting efficiency is improved; the grafted polyethylene can be directly obtained by using the catalyst through a one-step method, the grafted product does not need to be dried and separated, and the preparation process of the grafted polyethylene is simplified.

The invention relates to a mesoporous bioactive glass drug-loaded microsphere preparation as well as a preparation method and application thereof, the microsphere preparation takes mesoporous bioactive glass microspheres as a skeleton, and an anti-tumor drug is loaded on the mesoporous bioactive glass microspheres. The mesoporous bioactive glass microsphere comprises a SiO2-P2O5 binary oxide or a SiO2-CaO-P2O5 ternary oxide, has a mesoporous channel structure of 5-12 nm and a high specific surface area of 300-500 m < 2 > / g, and can be used for loading antitumor drugs with various characteristics. Compared with the prior art, the microspheres are combined with the bioglass degradability and alkaline degradation products to neutralize the tumor acid environment, and a better tumor interventional embolism treatment effect can be synergistically achieved. The mesoporous bioactive glass microspheres are prepared by adopting a microfluidic process, the method is simple and high in yield, and meanwhile, the purposes of regulating and controlling the size of the microspheres and the aperture of mesopores are achieved by regulating the flow rates of internal and external phases.

The utility model provides a kind of for gas-water separator's test system, belong to fuel cell auxiliary equipment performance test technical field.The system includes gas supply device, liquid water supply device, test piece installation interface and data acquisition device.Gas supply device provides thermodynamic saturated wet air by gas humidification device, and liquid water supply device injects atomized droplet by water mist generating device;Test piece installation interface is used to install the gas-water separator to be measured, so that wet air and droplet mix after flowing through the measured piece;Data acquisition device obtains input liquid quantity and collected liquid quantity after separation.The system is heat-protected by pipeline to ensure that the dew point temperature of wet air is at least 2 ℃ lower than the pipeline wall temperature, which physically eliminates the imbalance of liquid quantity caused by secondary condensation or evaporation.The utility model realizes high-precision testing through physical structure improvement, does not rely on specific control program, solves the problem of existing test benchmark distortion, and has the advantages of high testing precision and good working condition reproducibility.

The application discloses a cobalt-iron catalyst and a preparation method and application thereof. The cobalt-iron catalyst is composed of iron elements, cobalt elements, metal element A and metal element B; the metal element A is at least one selected from Mn, Cu, Zn, Ti, Al, Cr, Ni, Ce and Zr; the metal element B is at least one selected from Li, Na, K, Rb, Cs, Be, Mg, Ca, Sr and Ba; in the cobalt-iron catalyst, the metal elements exist in the form of elements, oxidation states or carbonization states; in the cobalt-iron catalyst, taking the total mass of the metal elements as 100 wt%, the content of the iron elements is 30-99 wt%, the content of the cobalt elements is 30-99 wt%, the content of the metal element A is 0.1-60 wt%, and the content of the metal element B is 0.01-50 wt%.

The invention discloses a supported metallocene catalyst for ethylene polymerization and application of the supported metallocene catalyst. The supported metallocene catalyst comprises an alkyl tin chloride / methylaluminoxane / silica gel carrier and a metallocene compound supported on the carrier; the alkyl tin chloride / methylaluminoxane / silica gel carrier is a silica gel carrier modified by alkyl tin chloride and methylaluminoxane. Alkyl tin chloride is used for modifying a silica gel carrier, the compound can react with hydroxyl, and a large amount of hydroxyl is eliminated; and the metallocene can be combined with MAO, so that certain space barrier exists between the MAO and the surface of the silica gel, the crowding effect is weakened, the loading capacity is improved, and metallocene combination sites are increased.

The invention discloses a cobalt-based catalyst and a preparation method and application thereof. Comprising a cobalt element and an alkali metal element; the cobalt element exists in the form of a simple substance, cobalt oxide or cobalt carbide; the alkali metal element is selected from at least one of Li, Na, K, Rb and Cs; the alkali metal element exists in the form of a simple substance; in the cobalt-based catalyst, the total mass of the metal elements is 100 wt%, the content of the cobalt element is 50-99.5 wt%, and the balance is alkali metal elements. The catalyst has high activity and oxygen-containing compound selectivity in Fischer-Tropsch synthesis. The phenomenon of low selectivity of the oxygen-containing compound in Fischer-Tropsch synthesis is effectively solved, and an effective way is provided for improving the selectivity of the oxygen-containing compound.

The invention provides de-waxing powder and a preparation method thereof, the de-waxing powder is prepared from the following raw materials in percentage by mass: greater than or equal to 60% of aggregate, less than or equal to 80% of additive and water, and the additive comprises an inorganic binder, an organic binder, a pore-forming agent, a dispersing agent and a suspending agent; the aggregate comprises quartz powder; the mass percentage of the inorganic binder is greater than 0 and less than or equal to 5%; the mass percent of the organic binder is greater than or equal to 0.5% and less than or equal to 2%; the mass percent of the pore-forming agent is greater than 0 and less than or equal to 20%; the mass percent of the dispersing agent is greater than 0 and less than or equal to 0.5%; the mass percent of the suspending agent is greater than 0 and less than or equal to 0.5%; the mass percent of water is greater than or equal to 10% and less than or equal to 25%. The de-waxing powder has the advantages of porous structure, adjustable particle size, high inertia, no reaction with most of porous ceramic matrixes and the like, and the problems of de-waxing powder sticking and permeation hole blocking are well solved.

The invention discloses a rare earth doped ABF3 perovskite type nano luminescent material and a preparation method and application thereof, the general formula of the luminescent material is ABF3: x mol% Lnn < + >, A is selected from at least one of alkali metals Li, Na, K, Rb and Cs; b is selected from at least one of alkaline earth metal or transition metal Mg, Ca, Sr, Ba, Mn, Zn, Cd, Co, Ni and Cu; f represents a fluorine element, and Ln represents a lanthanide rare earth element; x mol% represents the percentage of lanthanide rare earth ions accounting for the total mole number of alkaline earth metal or transition metal and lanthanide rare earth elements, 0 lt; x is less than or equal to 80; and n is 2 or 3. The internal hydroxyl defect of the nano-luminescent material is effectively inhibited, and the rare earth ions are doped in the nano-luminescent material in a heterovalent manner, so that cross relaxation among the rare earth ions can be promoted, and high-order nonlinear photon avalanche up-conversion of the nano-luminescent material at room temperature is realized.

The present invention relates to the technical field of composite material preparation and application, and provides a method for preparing an IL@MIL-101 composite material and a method for preparing an IL@MIL-101 composite material in CO 2 The preparation method comprises: S1, exchanging tributyl ethylphosphonium bromide solution with alkaline ion exchange resin to obtain [P 4442 ][OH] aqueous solution; S2, the obtained [P 4442 ][OH] aqueous solution and organic acid H n X was neutralized, stirred for a period of time, and then rotary evaporated and dried to obtain [P 4442 ] n [X] ionic liquid; S3, disperse MIL-101 in the solvent, add [P 4442 ] n [X] The ionic liquid is mixed, stirred for a period of time, and centrifuged to dry to obtain the IL@MIL-101 material. The ionic liquid in the method of the present invention has a wide range of choices and is suitable for CO 2 Capture of CO 2 / N 2 Gas separation has strong universality; the preparation method is simple, the operation is simple and fast, it is green and environmentally friendly, and the cost is low.