41results about How to "Uniform particle distribution" patented technology

The invention discloses a Toll-like receptor stimulant-based vaccine adjuvant lipid compound and application thereof, and particularly discloses a compound as shown in a formula (I), a stereoisomer thereof, an N-oxygen compound thereof, a solvate thereof or a pharmaceutically acceptable salt thereof. The mRNA-TLP composition prepared from the adjuvant lipid compound provided by the invention has significantly improved targeting to mouse spleen antigen presenting cells, and can significantly inhibit tumor growth. # imgabs0 #

The invention provides a fluorine-containing polymer wetting reversal agent suitable for shale reservoir protection as well as a preparation method and application of the fluorine-containing polymer wetting reversal agent. The preparation method of the reverse wetting agent comprises the following steps: adding ethylamine, triethylamine and deionized water into a reaction flask, and adding perfluorooctanoyl chloride into the system for reaction; after the reaction is completed, potassium hydroxide and 2-chloroethanol are continuously added for reaction; and after the reaction is completed, obtaining the N-ethyl-N-hydroxyethyl perfluorooctanamide. Adding nanoparticles, a silane coupling agent and ammonia water into the dispersant solution, and carrying out a modification reaction to obtain a modified nanoparticle solution; and adjusting the pH value of the obtained modified nanoparticle solution to 5-9, adding N-ethyl-N-hydroxyethyl perfluorooctanamide, introducing nitrogen to remove oxygen, adding an initiator, and carrying out thermal initiation polymerization reaction to obtain the composite material. The wetting reversal agent disclosed by the invention has excellent wetting reversal performance and a certain filtration reduction effect, and provides innovative thinking for development of a high-performance water-based drilling fluid technology.

The utility model relates to a vertical roller flour mill which comprises a roller flour mill main machine consisting of an upper machine body and a lower machine body, a main shaft component positioned in the lower machine body and a power mechanism for driving the main shaft component to rotate, the main shaft component comprises a main shaft, an airflow shunting center disc capable of synchronously rotating along with the main shaft, a wear-resistant curve large ring, a center disc mounting seat and a lower air inlet duct, the airflow shunting center disc is mounted on the center disc mounting seat, the center disc mounting seat is mounted on the main shaft, and the lower end of the center disc mounting seat and the lower air inlet duct are mounted together; the wear-resistant curve large ring is mounted on the central disc mounting seat; an air duct is mounted on the upper machine body, and after external airflow enters the lower machine body through the air duct, most airflow blows fine powder into the upper machine body; the utility model has the advantages of reasonable structure, simple and convenient operation, double gas circuit structure, lower end gas inlet to avoid material accumulation, high efficiency and energy saving.

The invention relates to an integrated preparation device for a ball-milling ash-based passivation material. The integrated preparation device comprises a feeding system, a ball-milling system, a washing and centrifuging system and a drying system, wherein the feeding system comprises a storage unit and a feeding pipeline; the ball milling system is connected with the feeding system; the ball milling system is positioned below the feeding system for a certain distance, and feeding is realized by utilizing gravity; the washing centrifugal system is connected with the ball milling system and comprises a centrifugal machine, a cleaning liquid storage tank, a waste liquid storage tank, a liquid conveying pipeline, a discharging pipeline and an automatic pH meter; and the drying system is connected with the washing and centrifuging system and comprises a feeding pipeline and a dryer. According to the invention, the ball milling system and the washing centrifugal system which are automatically controlled are designed, so that the purposes of efficiently preparing the ash-based passivation material and automatically washing pH are achieved.

The invention discloses a preparation method of an Mg / Al co-doped modified layered cobalt-free lithium-rich manganese-based positive electrode material, and belongs to the technical field of lithium ion batteries. The method comprises the following steps: adding excessive Li2CO3, Mn oxide, Ni oxide, Mg compound and Al compound into a ball milling tank of an organic solvent, and fully mixing through mechanical ball milling to obtain uniform mixed powder; drying the mixed powder at 80 DEG C for 3-10 hours; the second-stage roasting temperature is 700-900 DEG C, the second-stage roasting time is 10-20 hours, and the Mg / Al co-doped modified layered cobalt-free lithium-rich manganese-based positive electrode material is obtained. The preparation method comprises the following steps: uniformly mixing the dried powder again, roasting at the room temperature to 350-500 DEG C, preserving heat for 3-6 hours, and roasting at the second-stage roasting temperature of 700-900 DEG C for 10-20 hours. The Mg / Al co-doped layered cobalt-free lithium-rich manganese-based positive electrode material prepared by a high-temperature solid-phase method is subjected to morphology analysis, and it is observed that sample particles are uniform in distribution and appropriate in particle size, which indicates that the Mg / Al co-doped layered cobalt-free lithium-rich manganese-based positive electrode material possibly has good electrochemical performance. Al < 3 + > doping can effectively improve the electrochemical performance of the cobalt-free lithium-rich manganese-based positive electrode material.

The utility model relates to the technical field of food quick-freezing feeding, in particular to a bean food quick-freezing vibration feeding device which comprises a machine frame body, a material conveying assembly is supported between the two ends of the machine frame body, a vibration assembly is fixedly installed above a first supporting frame, and the vibration assembly comprises a motor, a fixing base, a rotating shaft, a fixing rod, a fixing block, a transmission rod and a knocking rod. The fixing seats are fixedly installed at the two ends of the upper portion of the first supporting frame and located on the bottom side of the motor, one ends of the rotating shafts are movably installed at the centers of the fixing seats, the fixing rods are fixedly installed at the other ends of the rotating shafts, the fixing rods are fixedly installed at the two ends of the fixing blocks in a clamped mode, and one ends of the transmission rods are fixedly installed on one sides of the fixing blocks. A knocking rod is fixedly mounted at the other end of the transmission rod. According to the utility model, the material conveying assembly is knocked through the connecting rod mechanism driven by the motor of the vibration assembly, the vibration is beneficial to the transportation of bean dreg food, the soybean milk content in bean dregs can be reduced, and the material conveying assembly can transport the bean dreg food more efficiently.

This product relates to the field of nanomaterials and phase change energy storage material preparation technology, and discloses a method for preparing two-dimensional semiconductor phase change energy storage masterbatch. The method involves surface organic functionalization of molybdenum disulfide nanosheets, followed by assembly with surface-hydroxylated boron nitride nanosheets to form a two-dimensional heterogeneous layered framework with interconnected interlayer gaps. Molten fatty acid phase change components are introduced into the interlayer gaps, and after cooling, confined phase change composite particles are obtained. These particles are then coated with a vinyl copolymer containing anhydride grafted segments, and subsequently melt-blended with a thermoplastic carrier resin, extruded, and pelletized. The resulting masterbatch maintains the two-dimensional interlayer contact structure, inhibits interlayer aggregation and melt migration of the phase change components, and improves the continuity of heat transfer, the uniformity of photothermal conversion, and the stability of cyclic thermal storage.

This utility model discloses a screening device for plastic granule production, relating to the field of plastic granule screening devices. The device includes a main support and side frames. A vibrating screen frame is inclinedly mounted on the upper side of the main support, with a fixed feeding hopper above it. The vibrating screen frame contains a material trough and a screen. A first collecting frame is located below the screen within the main support. An inverted conical moving frame is slidably configured within the vibrating screen frame. A motor on the side frames drives the moving frame to move via a rotating wheel and connecting rod. Sensor probes are embedded in the side plates of the vibrating screen frame. This device evenly spreads granules through the dynamic displacement of the moving frame. Combined with sensor probe monitoring and motor-driven control, it avoids screen accumulation and improves screening efficiency and accuracy.

The invention discloses a magnesium-based composite material ribbon as well as a preparation method and application thereof. The preparation method of the magnesium-based composite material thin strip comprises the following steps: adding a metal particle reinforced magnesium-based composite material blank into a vacuum melt-spinning furnace with a melt viscosity real-time monitoring function, and electrifying an induction heating coil in the vacuum melt-spinning furnace to melt the blank into a melt; and the heating power of the induction heating coil is adjusted to enable the viscosity of the melt to reach the casting target viscosity, the melt is sprayed to a copper roller in a vacuum melt-spinning furnace for cooling and casting, and the magnesium-based composite material thin strip is obtained. The preparation method of the magnesium-based composite material thin strip has the advantages of being simple in technological process, high in production efficiency, high in yield and the like, and the prepared magnesium-based composite material thin strip is uniform in metal particle distribution, free of defects such as pores / looseness / cracks, excellent in mechanical property and suitable for large-scale industrial production and application.

According to the preparation method of the silver-coated copper powder for the solar low-temperature drying slurry, the silver-coated copper powder which is high in oxidation resistance, good in conductivity, complete in coating and capable of being used for the low-temperature slurry can be prepared through the method, and the preparation method is low in production cost, controllable in technological process and high in practicability.

The invention belongs to the technical field of crystal materials, and discloses a lutetium yttrium silicate precursor and a preparation method and application thereof. The preparation method of the yttrium lutetium silicate precursor comprises the following steps: preparing a sodium silicate solution; adding lutetium chloride, yttrium chloride and cerium chloride into deionized water to form a mixed solution, then adding the sodium silicate solution, and stirring for 3-8 minutes to obtain a mixed material liquid; mixing the mixed material liquid with a precipitant, carrying out precipitation treatment, stirring for 5-15 minutes, carrying out suction filtration, and washing with deionized water until the pH value is 7-8, so as to obtain a precipitate; and burning the precipitate to obtain the catalyst. The yttrium lutetium silicate precursor produced by the invention is used for crystal growth, the obtained crystal bar is free of miscellaneous agglomerate fog cracking and the like, the uniformity is better, the light output of the crystal is better, and the resolution ratio is better.

The application provides an electrocatalytic material and preparation and application thereof, and particularly relates to an electrocatalytic material which has an improvement effect on the oxygen evolution reaction in electrolysis of water, wherein the active component of the electrocatalytic material comprises NiO and La2O3, the molar ratio of Ni and La is (2-10):1; and the structure is a load type structure in which the spherical-like nanoparticles composed of NiO-La2O3 composite nanosheets are loaded on the surface of a foamed nickel, wherein the loading amount of the electrocatalytic material is 0.012-0.018 g / cm 2 , the electrocatalytic material has the characteristics of strong interaction between components and uniform wrapping on the foamed nickel skeleton, and belongs to the field of preparation of electrochemical catalytic materials. The application has the advantages that: the electrocatalytic material has a simple preparation process, mild conditions and low cost; the material can effectively reduce the overpotential of the oxygen evolution reaction; only 198 mV is needed to reach a current density of 10 mA cm ‑2 ; the charge transfer resistance is only 2.38 Omega; and the material can continuously and stably work for 200 hours in a strong alkali environment.

The present invention relates to a super-fouling-resistant three-dimensional transparent glaze and a preparation process thereof, and belongs to the technical field of glaze preparation. The present invention modifies kaolin to change the surface structure and chemical properties of kaolin, thereby improving the compactness and permeability resistance of the glaze, effectively preventing the penetration and adhesion of stains, and the addition of silicon carbide and the subsequent solution intercalation modification combined with microwave radiation and roasting treatment make the crystal structure of the modified kaolin more stable, thereby enhancing the wear resistance and scratch resistance of the glaze; the present invention ensures the uniformity and fineness of the glaze components and the uniform coating of the glaze through ball milling, and adds water, sodium carboxymethyl cellulose and sodium tripolyphosphate as additives to improve the rheology and stability of the glaze, and then uses a magnetic iron remover to remove iron from the glaze, effectively avoiding the color spots and defects caused by iron oxidation in the glaze layer during the firing process, and improving the smoothness and aesthetics of the glaze layer.

The invention discloses a method for batch preparation of fine-grain Ti (C, N)-based metal ceramic by compounding 3D printing and reactive hot isostatic pressing sintering. The preparation method comprises the following steps: firstly, mixing according to a certain ratio to obtain Ti (C, N)-based metal ceramic raw materials, then curing and forming a required metal ceramic blank through bonding jet 3D printing, and then preparing the novel Ti (C, N)-based metal ceramic by virtue of degreasing and hot isostatic pressing sintering. The novel fine grain Ti (C, N)-based metal ceramic can be rapidly prepared in batches by combining three processes of a bonding spraying 3D printing forming technology, a reaction synthesis technology and a hot isostatic pressing sintering technology; the reaction of the mixture powder is relatively slow, and the reaction process is easy to control; the mixture ratio is relatively loose, and the yield is high; the novel fine-grain Ti (C, N)-based metal ceramic prepared by sintering is wide in application range, is sprayed and enhanced by being matched with a composite coating on the surface of the metal ceramic, and is high in toughness in the fields of room temperature and high temperature.

The utility model relates to road construction technical field, concretely is a kind of semi-flexible composite pavement construction equipment, including mounting seat, the bottom of mounting seat is rotatably equipped with trowelling mechanism, the outer surface of mounting bracket is fixedly installed with the protective cover for covering trowelling mechanism outside, the rear side of mounting seat top is fixedly installed with handle, the top of mounting seat is fixedly installed with the driving mechanism for controlling trowelling mechanism rotation;Trowelling mechanism includes trowelling disc and the cover plate of fixed installation in trowelling disc top, the inside longitudinal sliding of trowelling disc is equipped with multiple loose components;By setting loose component and guide component, loose component is automatically extended downward when rotating to the front side of guide component with trowelling disc, can carry out mechanical loose to caked material, break hard knot structure, make material particle distribution more uniform;Loose component is retracted when rotating to the rear side of guide component, by trowelling disc is flattened and compacted, avoid the uneven surface caused by caking, improve pavement flatness and compactness.

The invention discloses a lithium ion battery positive electrode layered oxide with an edge-surface shared layered structure and a preparation method and application thereof, and belongs to the technical field of lithium ion battery positive electrode materials. The preparation method comprises the following steps: synthesizing a layered oxide precursor containing sodium or potassium through high-temperature calcination, immersing the layered oxide precursor containing sodium or potassium into a solution containing lithium salt, and adding a nano layered oxide ion exchange auxiliary agent for liquid-phase ion exchange. In the ion exchange process, the nano layered oxide is adsorbed on the surface of the precursor, so that the reaction activation energy is reduced, and the uniformity and consistency of the exchange process are improved. And filtering, washing and drying to finally obtain the prismatic surface shared layered structure. The method comprises the steps of high-temperature calcination and ion exchange, and specifically provides raw materials and operation conditions. The prepared material has a laminated structure shared by prism surfaces of the lithium oxide octahedron and the cobalt oxide octahedron, is uniform in particles, controllable in particle size, high in material capacity and excellent in cycle performance, and can be widely applied to the electronic product and power automobile market.

The invention relates to the technical field of batteries, in particular to a preparation method of safe slurry, which comprises the following steps: S1, primary pre-dispersion of a mixed ceramic material and a solvent, S2, secondary pre-dispersion after addition of a dispersant, S3, stirring dispersion after third pre-dispersion after addition of a conductive agent, S4, fourth pre-dispersion and stirring dispersion after addition of a binder, and S5, secondary pre-dispersion after addition of a binder. S5, stirring and dispersing after adding a dispersing agent, and S6, slowly stirring and dispersing and reversely defoaming, and finally slowly stirring and discharging to obtain the safe slurry. According to the preparation method disclosed by the invention, aggregate of particles can be more effectively broken through multiple pre-dispersion and stirring dispersion, interaction force among the particles is reduced, so that relatively uniform particle distribution is obtained, proper viscosity of a mixed solution can be ensured through fractional addition of the dispersing agent, and the mixed solution has a relatively good dispersion effect during stirring. In addition, the invention also discloses a safe slurry and a safe coating structure for a battery.

The invention relates to an emulsion containing spectinomycin hydrochloride and lincomycin hydrochloride and a preparation method thereof, and belongs to the field of animal medicine. The emulsion is prepared by jointly combining spectinomycin hydrochloride, lincomycin hydrochloride, tea polyphenol, lipoic acid, polyvinyl alcohol (PVA) and the like and matching with a specific ultrasonic treatment process, and the method remarkably improves the stability of the emulsion, reduces drug degradation and improves the bioavailability of the drug. Animal experiments show that the emulsion prepared by the invention can be quickly and completely absorbed after being injected, the antibody level after vaccination in an animal body can be remarkably improved, and the validity period of the antibody is prolonged. The emulsion disclosed by the invention is simple in preparation method and suitable for large-scale production, and has a relatively good application prospect.

The application discloses a high-density high-purity polycrystalline kaolinite preparation method under hot isostatic pressing conditions. –3 The steel ladle is placed in a graphite furnace cylinder body of a hot isostatic pressing high-pressure container, and a graphite sealing cover is covered on the steel ladle; argon is used as a pressure transmission medium, a multi-gradient cylinder body temperature and pressure increasing mode is adopted, the pressure in the cylinder sample bin is increased to 105.8 MPa, the temperature is increased to 800 DEG C, and the temperature and pressure are kept for 4.8 hours; a multi-gradient cylinder body temperature and pressure decreasing mode is adopted, the temperature in the cylinder sample bin is decreased to 177 DEG C, and the pressure is decreased to 71.8 MPa; finally, the pressure is released, the temperature is decreased to room temperature, and the polycrystalline kaolinite aggregate is obtained; and the technical blank of preparing a high-density polycrystalline kaolinite aggregate bulk body rich in aluminosilicate mineral experimental samples under high-temperature and high-pressure conditions is solved.

The invention relates to the technical field of novel electro-catalysis materials, and discloses a fullerene modified carbon loaded amorphous niobium oxide nano island confinement osmium-based ultra-small cluster electro-catalyst as well as a preparation method and application of the fullerene modified carbon loaded amorphous niobium oxide nano island confinement osmium-based ultra-small cluster electro-catalyst. Amorphous niobium oxide (NbOx) and osmium (Os) clusters are uniformly loaded on the carbon substrate material, the amorphous niobium oxide is in a nano island form, and the average particle size of the osmium (Os) clusters is 0.8-1.2 nm. The ultrathin nano carbon sheet FDC prepared by modification of fullerene has the characteristics of excellent conductivity and high specific surface area, so that active components are fully exposed, the phase interface contact area is increased, and the heterogeneous catalysis behavior is greatly promoted. The electrocatalyst has excellent electrocatalytic activity and stability, the active components of the electrocatalyst have the characteristics of small particle size, uniform particle distribution and the like, and the problems of reduction of catalytic performance and the like caused by reduction of active sites due to overlarge particles of the active components in the electrocatalyst with a composite structure are solved.

The invention provides a fenerenone capsule and a preparation method thereof, and relates to the technical field of pharmaceutical preparations. The finerenone capsule provided by the invention is prepared from the following components: finerenone, a carrier, a filling agent and a disintegrating agent, the carrier is selected from at least one of hydroxypropyl methylcellulose E3 and hydroxypropyl methylcellulose E5; the carrier is divided into a slurry preparation carrier and a granulation carrier; the mass ratio of the granulation carrier to the slurry preparation carrier is (12-30): 1. The fenerenone capsule prepared by the invention has the advantages of uniform particle distribution and stable release. Compared with tablets, the capsule has the advantages that the exposure time of particles and tablets is shortened, coating is avoided technically, and the influence of moisture and a coating layer is avoided to the greatest extent.

The invention relates to a method for preparing an Al-Y2O3 composite coating through electro-deposition, which is used for preparing the Al-Y2O3 composite coating by using Y2O3 particles as second-phase particles through an electro-deposition technology. The preparation method comprises the following steps: putting anhydrous AlCl3, LiAlH4 and Y2O3 particles into a glove box filled with argon, weighing 4g of anhydrous AlCl3 and 0.28 g of anhydrous LiAlH4 by using a balance, putting the anhydrous AlCl3 and the anhydrous LiAlH4 into a beaker, and then weighing a certain amount of Y2O3 particles (20g / L-80g / L) and putting the Y2O3 particles into the beaker; and the beaker is sealed, taken out and put into a fuming cupboard. The method comprises the following steps: measuring 20ml of benzene by using a measuring cylinder, pouring the benzene into a sealed beaker by using a guide tube, and then putting the beaker into a magnetic stirrer under an ice bath condition; 5 ml of tetrahydrofuran is measured and slowly poured into the beaker through the guide tube, and in order to prevent the tetrahydrofuran from deteriorating, the process needs to be carried out under an ice bath condition. And adding tetrahydrofuran, sealing the beaker, stirring for 2-3 hours, and carrying out ultrasonic dispersion for 30 minutes. According to the method, an aluminum sheet is used as an anode, a copper sheet is used as a cathode, the current density is controlled to be 30-50 milliamperes / cm < 2 >, the temperature of a plating solution is 20-40 DEG C, the electrodeposition time is 30-75 min, and the Al-Y2O3 composite coating with the compact surface and uniform particle distribution can be obtained, and the Al-Y2O3 composite coating mainly comprises Al and Y2O3.

And preparing the Al-MoS2 composite coating by adopting MoS2 as second-phase particles by utilizing an electro-deposition technology. The preparation method comprises the following steps: putting anhydrous AlCl3, LiAlH4 and MoS2 particles into a glove box filled with argon, weighing 4g of anhydrous AlCl3 and 0.28 g of anhydrous LiAlH4 by using a balance, putting into a beaker, and then weighing a certain amount of MoS2 particles (10g / L-80g / L) and putting into the beaker; and the beaker is sealed, taken out and put into a fuming cupboard. The method comprises the following steps: measuring 20ml of benzene by using a measuring cylinder, pouring the benzene into a sealed beaker by using a guide tube, and then putting the beaker into a magnetic stirrer under an ice bath condition; 5 ml of tetrahydrofuran is measured and slowly poured into the beaker through the guide tube, and in order to prevent the tetrahydrofuran from deteriorating, the process needs to be carried out under an ice bath condition. And adding tetrahydrofuran, sealing the beaker, stirring for 2-3 hours, and carrying out ultrasonic dispersion for 30 minutes. According to the method, an aluminum sheet serves as an anode, a copper sheet serves as a cathode, the current density is controlled to be 30-50 milliamperes / cm < 2 >, the temperature of a plating solution is 20-40 DEG C, the electrodeposition time is 30-75 min, and the Al-MoS2 composite coating with the compact surface and uniform particle distribution can be obtained and mainly comprises Al and MoS2.

The invention discloses a manufacturing method of a product for enhancing friction between connecting parts, and belongs to the technical field of material surface treatment. The method is characterized in that a hard metal sheet is subjected to chemical plating, and hard wear-resistant particles and the hard metal sheet form a composite product through a four-step plating method; the hard wear-resistant particles are uniformly plated on the surface of the hard metal sheet by adopting a shakeout method, so that the particles are uniformly distributed; the upper surface and the lower surface of the hard metal sheet can be respectively plated with hard wear-resistant particles with different particle sizes; particles are uniformly distributed, the coating hardness is high, and the structure is compact; and the surface of the plated product is coated with a rubber sealing line, so that the product has a sealing function, and a sealing assembly does not need to be added.

The invention relates to the technical field of medium-entropy alloy additive manufacturing, in particular to an ODS / NiCoCr medium-entropy alloy, a preparation method of the ODS / NiCoCr medium-entropy alloy, an additive manufacturing process and a printed piece. The invention relates to a preparation method of an ODS / NiCoCr medium-entropy alloy. The preparation method comprises the following steps: carrying out resonance acoustic mixing on Y2O3 powder and NiCoCr medium-entropy alloy powder; the Y2O3 powder is added in batches; the resonance sound mixing comprises the following steps: the vibration frequency is 30-85 Hz, the acceleration is 3-100 g, and the vibration time is 80-160 min. According to the preparation method, the NiCoCr medium-entropy alloy powder and the Y2O3 particles are adopted, the ODS / NiCoCr medium-entropy alloy composite powder which is free of Y2O3 agglomeration and uniform in distribution is prepared through resonance sound mixing, the composite powder is spherical or nearly spherical and good in fluidity, and the uniformity and stability of powder laying in the SLM process can be improved.

This invention discloses a method for preparing high-density, high-purity polycrystalline barite polymers under hot isostatic pressing conditions, wherein barite sample powder is compacted and sealed to a vacuum degree of 10. –3 The sample was placed in a steel cladding with dimensions of 55.89 mm outer diameter × 88.76 mm height × 3 mm wall thickness. The cladding was then placed inside the graphite furnace cylinder of a hot isostatic pressure vessel and sealed with a graphite cap. Using argon as the pressure transfer medium, a multi-gradient cylinder heating and pressurization method was employed to raise the temperature inside the sample chamber to 950 °C and the pressure to 112.5 MPa. This pressure and temperature were maintained for 6.0 hours. A multi-gradient cylinder cooling and depressurization method was then used to lower the temperature inside the sample chamber to 178 °C and the pressure to 71.1 MPa. The pressure was then released and the sample was cooled to room temperature to obtain a polycrystalline barite polymer. This method filled the technical gap in the preparation of bulk sulfate experimental samples of high-density polycrystalline barite polymers under high temperature and high pressure conditions.

The utility model relates to the technical field of agricultural processing facilities, and discloses agricultural biological type water-soluble fertilizer mixing equipment which comprises a mixing barrel, a support frame arranged on the mixing barrel, a dumping groove arranged between the mixing barrel and the support frame and convenient for dumping a mixture, a driving device mounted on the support frame, a driving shaft arranged inside the mixing barrel, and a stirring device mounted on the driving shaft, according to the utility model, after the mixture is preliminarily stirred by the pre-stirring assembly, the mixture enters the diffusion assembly, and the diffusion assembly utilizes the impact generated by the mixture and the rotating force of the driving shaft to enable the dispersion plate to rotate on the fixed shaft rod through the movable sleeve, so that the mixture is powerfully beaten, and the efficient scattering is realized. By adopting the scattering effect, the quality and efficiency of stirring operation are greatly improved, scattered mixture particles are more uniformly distributed and can be more fully contacted and fused with other components in the subsequent stirring process, and uneven mixing caused by agglomeration is avoided, so that the overall mixing uniformity and stability of the water-soluble fertilizer are remarkably improved.

The present invention belongs to the technical field of yttrium oxyfluoride powder and its preparation, and specifically relates to a yttrium oxyfluoride powder for plasma corrosion-resistant thermal spraying and a preparation method thereof. The preparation method of the yttrium oxyfluoride powder for plasma corrosion-resistant thermal spraying comprises the following steps: precipitation reaction: dripping ammonia water into the yttrium ion solution for reaction, dripping the fluorine source solution while stirring, then adding a dispersant, continuing the reaction, and precipitating; aging at 70-80°C; dehydration and calcination, cooling to obtain powder; grinding the obtained powder, requiring D10: 0.2-0.5μm, D50: 1-1.5μm, D90: 2.5-2.8μm, D100: <3.2μm, adding a granulation shape regulator for spray granulation, and obtaining yttrium oxyfluoride powder for plasma corrosion-resistant thermal spraying. The present invention provides a preparation method of yttrium oxyfluoride powder for plasma corrosion-resistant thermal spraying, and the prepared yttrium oxyfluoride powder is uniformly dispersed and has high purity.

The invention provides a preparation method of zirconium oxide powder with a negative thermal expansion material film layer. According to the specific technical thought, a fluidization technology is utilized, working gas is preheated, the preheated working gas serves as carrier gas, the carrier gas and zirconium oxide powder form gas-solid two-phase flow, and the gas-solid two-phase flow is introduced into a fluidized bed reactor in a plasma device; and introducing the gasified negative thermal expansion material and working gas into the fluidized bed reactor from the bottom of the fluidized bed reactor at the same time, so that the gasified negative thermal expansion material is deposited on the surface of the fluidized zirconium oxide powder, the gas phase and the solid phase are in complete contact, and the negative thermal expansion material is uniformly coated on the surfaces of the zirconium oxide powder particles to form a uniform and compact film. And finally, introducing a gas-solid phase mixture generated by the reaction into a gas-solid separation device, and treating to obtain the zirconium oxide powder with the negative thermal expansion material film layer. The method is simple in process, short in production period, stable in product structure, small in particle size and uniform in particle size distribution.

The invention belongs to the technical field of ceramic matrix composite materials, and particularly relates to a SiC-W2B5 / C composite material and a preparation method thereof. Comprising the following steps: (1) mixing tungsten carbide, boron carbide, calcined petroleum coke, silicon powder and a ball milling dispersant, placing the mixture in a ball mill for ball milling, and drying and sieving after ball milling to obtain raw material powder; (2) putting the raw material powder into a graphite mold, and carrying out hot pressing reaction sintering in a sintering furnace to obtain a SiC-W2B5 / C composite material; wherein the content of SiC accounts for 5-30 vol.% of the total amount of the SiC-W2B5 / C composite material. The Si powder and the C phase react to generate SiC, in the sintering process, Si can serve as a high-temperature liquid phase, the sintering temperature is reduced, the density of the composite material is improved, meanwhile, the SiC phase generated through the reaction enhances the interface bonding force, and then the mechanical property of the composite material is improved.