23results about How to "Uniform preparation" patented technology

The invention discloses a strong spin-orbit torque metal superlattice thin film material, and belongs to the technical field of new spin electron materials. The superlattice thin film material comprises a thin film system formed by heavy metal layers with strong spin-orbit coupling and light metal layers with high-orbit Hall conductivity, wherein the heavy metal layers periodically grow on a substrate; in each period, the thickness of the heavy metal layer with strong spin-orbit coupling is 1-3nm, and the thickness of the light metal layer with high-orbit Hall conductivity is 1-3nm. Electron orbital angular momentum flow accumulation is generated on the surface of the light metal layer, the orbital current is injected into heavy metal with strong spin-orbit coupling, and the orbital current is converted into spin current by utilizing the strong spin-orbit coupling characteristic of the heavy metal layer. Therefore, the spin current generation efficiency of the strong spin orbit torque metal superlattice thin film material can be improved, and the giant damping spin orbit torque efficiency and the low-current-density turnover ferromagnetic layer magnetic moment are realized.

The invention belongs to the technical field of graphene material preparation, and particularly relates to a universal electrochemical preparation method of covalent functionalized graphene (CFG), which comprises the following steps: (1) in an oil seal state of light sealing oil, performing electrochemical intercalation treatment on a graphite electrode by using concentrated sulfuric acid; (2) after intercalation is completed, light sealing oil is injected into the electrolytic bath while concentrated sulfuric acid is discharged; (3) in the electrolytic bath, constructing a micro-liquid membrane reaction zone by using density and intermiscibility differences of three working liquids, namely light sealing oil, aqueous electrolyte and heavy sealing oil, and enabling the micro-liquid membrane reaction zone to be in contact with the intercalated graphite electrode to generate electrochemical oxidation to generate CFG; (4) controlling the micro-liquid membrane reaction area to directionally move relative to the intercalated graphite electrode, so that the whole intercalated graphite electrode is gradually and completely converted into CFG; and (5) putting the CFG structure after the reaction into a solvent, carrying out mechanical stripping to prepare a dispersion liquid of CFG, and drying to obtain CFG powder.

The invention discloses a metformin empagliflozin tablet composition and a preparation method thereof. The metformin empagliflozin tablet composition is prepared from the following raw materials: metformin hydrochloride, empagliflozin, corn starch, copovidone, colloidal silicon dioxide, magnesium stearate and a gastric-soluble film coating premix. According to the metformin empagliflozin composition and the preparation method thereof, empagliflozin is dispersed in part of auxiliary materials, then mixing granulation is carried out through a wet granulator, empagliflozin and part of the auxiliary materials are premixed, and the particle size range of a metformin hydrochloride raw material is controlled, so that the problems of poor empagliflozin content uniformity and large inter-batch dissolution difference of the metformin empagliflozin composition prepared by a traditional process are solved; by controlling the mesh number of the wet granulation screen, the problems that materials adhere to the screen, discharging is difficult, and production efficiency is low in the wet granulation process are solved; compared with a fluidized bed production process, the equipment cost is low, the operation is simpler, and the production efficiency is higher; the pharmaceutical composition prepared by the preparation method disclosed by the invention is uniform in component mixing, simple to prepare, controllable in quality and consistent in in-vitro dissolution with an original preparation.

The method for preparing an amorphous silicon thin film according to the present invention includes: placing a substrate in a vacuum chamber; controlling the pressure in the vacuum chamber at a predetermined value and performing surface treatment on the substrate; and introducing silane gas and a rarefied gas into the vacuum chamber, heating the substrate, and depositing an amorphous silicon thin film on the substrate using silane gas ions. This method is characterized by low manufacturing difficulty, simple process, and low cost, while improving the growth rate and uniformity of the thin film, making the manufacturing process more stable and controllable, and resulting in a more uniform, dense, and stable amorphous silicon thin film.

The application discloses high-entropy rare earth silicate ceramic nano powder and a preparation method and application thereof. The preparation method of the high-entropy rare earth silicate ceramic nano powder comprises the following steps: 1) dissolving rare earth oxide powder in an acid solution to prepare a rare earth salt solution; 2) mixing the rare earth salt solution and a sodium silicate solution, adding ammonia water to perform chemical co-precipitation, then performing standing and aging, and then taking the precipitate to perform drying to obtain a precursor powder; and 3) placing the precursor powder under the condition that the temperature is 1100 DEG C to 1200 DEG C to perform calcination. The high-entropy rare earth silicate ceramic nano powder has excellent characteristics such as small particle size, uniform element distribution, large component space and no impurity phase, and the preparation method has the advantages of low synthesis temperature, simple equipment, simple and controllable process, low industrialization cost and the like, is suitable for being used on a hot end part of an aerospace engine and has a very wide application prospect.

The invention discloses a pill granulator for traditional Chinese medicine production, and relates to the technical field of pill granulation, the pill granulator comprises a machine body, a bearing assembly and a material rolling mechanism, the bearing assembly comprises an arc-shaped supporting plate, and a limiting groove is formed in the arc-shaped concave surface of the top of the arc-shaped supporting plate; an arc-shaped cover is fixedly installed at the position, close to the limiting groove, of the top of the arc-shaped supporting plate, a vibration module is installed on the arc-shaped face of the bottom of the arc-shaped supporting plate, the material rolling mechanism comprises a pressing roller and a servo motor, and a pill rolling groove is formed in the position, close to the limiting groove, of the outer circle face of the pressing roller; an auxiliary module is installed in the pressing roller and close to the pill rolling groove, an arc-shaped connecting rod is fixedly installed on the outer circle face of the pressing roller and close to the end face, and a ball is fixedly installed on the outer circle face of the arc-shaped connecting rod and close to the arc-shaped supporting plate. The pill pelletizer for traditional Chinese medicine production achieves the effect of stable operation, equipment operates stably, materials are not prone to deviation, pill pelleting is uniform, and safety and reliability are achieved.

The invention provides a composite belt and a preparation method and manufacturing equipment thereof. The lithium melt is conveyed to the die head through the melt conveying system under the protective atmosphere; the continuously conveyed base material is coated by the die head under the combined action of the protective gas and a stirring device in the die head; the composite belt with a continuous and uniform coating layer is successfully prepared through the further action of cooling shaping and a calendering mechanism; and the preparation of a plurality of coating layers can be simultaneously realized in the width direction of the base material. In addition, on the basis that continuity and uniformity are achieved, the minimum thickness of the composite belt can reach 0.1 micrometer. The first coulombic efficiency of the battery can be improved, the cycling stability of the battery is enhanced, and the service life of the battery is prolonged; and a more efficient and safer solution is provided for the preparation of the composite belt mainly comprising lithium and sodium in the battery.

The invention discloses a multi-channel virus detection SERS chip based on a resonant cavity and a preparation method thereof, wherein the chip comprises a plurality of detection holes, each of which is composed of a plurality of V-shaped Au nanopore arrays, wherein Au nanoparticles are distributed in the Au nanopore arrays to form an enhanced structure of the Au nanopore resonant cavity; the method firstly plates an Al film on a substrate, then corrodes and oxidizes the Al film, then deposits an Au film on the corroded and oxidized Al film, and finally drips Au nanoparticles on the V-shaped Au nanopore array to obtain a SERS chip. The chip disclosed in the invention specifically captures virus particles through a size effect, and based on the resonant cavity enhancement effect, effectively excites the overall Raman signal of the virus, greatly improves the reproducibility of the Raman signal, and realizes the distinction between different viruses; the preparation method disclosed in the invention is simple to operate, highly repeatable, and can realize uniform preparation of a large area of ​​the chip.

The invention relates to a special digital speckle preparation tool and method for measuring a deformation field of a ship model, and the tool comprises a housing, a first installation pedestal and a second installation pedestal which are vertically distributed at an interval in the housing, and a speckle preparation assembly, a primer preparation assembly, a pose sensing control assembly and a high-pressure gas supply assembly are installed in the housing. Power supply battery packs are arranged on the left and right sides of the rear part of the shell, a high-pressure air hose is connected to the tail part of the shell, and a top plate is arranged on the top surface of the shell; the speckle preparation work can be conveniently completed, the problems that existing speckle preparation tools and methods are low in preparation efficiency, poor in randomness of speckles, inconsistent in size, poor in applicability of large-scale complex structures, large in measurement noise and the like are effectively solved, and harmony and unification of speckle patterns between regular distribution and random characteristics are achieved. And the application of the DIC measurement technology in the field of high-precision deformation field measurement of the ship structure model is promoted.

The utility model belongs to conductive material technical field discloses a kind of substrate surface conductive polyaniline coating continuous processing device, for processing conductive polyaniline coating to substrate surface, comprising: DBD plasma processor, including plasma power supply, plasma power supply output end is connected with discharge electrode, plasma power supply ground end is connected with ground electrode, ground electrode and discharge electrode are placed in parallel, and gap for substrate passing is left between ground electrode and discharge electrode, DBD plasma processor is used to carry out hydrophilization and roughening treatment to substrate surface;Liquid storage system, liquid storage system includes three liquid storage tanks, three liquid storage tanks are respectively filled with aniline monomer solution, doped acid solution and oxidizing agent solution;The problems existing in the prior art that the preparation process is complex, the coating uniformity and the conductivity are not good are solved, the processing efficiency and the quality of the conductive polyaniline coating are effectively improved, and the continuous production of environmental protection and controllable morphology is ensured.

The invention discloses a method for preparing a gallium-doped hollow ZSM-5 molecular sieve through microwaves and application of the gallium-doped hollow ZSM-5 molecular sieve, and relates to the technical field of molecular sieve catalyst preparation. The preparation method comprises the following steps: mixing a silicon source, a template agent and deionized water, stirring to prepare a precursor, transferring the precursor into a digestion tank, carrying out microwave hydrothermal treatment, and roasting in a muffle furnace to remove the template agent to obtain a pure silicon molecular sieve; the method comprises the following steps: taking a pure silicon molecular sieve, adding an aluminum source, a template agent and deionized water, carrying out ultrasonic treatment, transferring into a digestion tank, carrying out microwave hydrothermal and dissolution-recrystallization, and roasting the obtained product in a muffle furnace to remove the template agent so as to obtain a hollow ZSM-5 molecular sieve; the method comprises the following steps: taking a hollow ZSM-5 molecular sieve, adding gallium nitrate and deionized water, carrying out ultrasonic treatment, transferring into a digestion tank, and carrying out gallium doping under microwave irradiation; and putting the dried product into a tubular furnace, and carrying out heat preservation in an argon atmosphere at 200-300 DEG C to obtain the gallium-doped hollow ZSM-5 molecular sieve. The microwave hydrothermal process and the dissolution-recrystallization process are combined, so that the preparation time of the hollow ZSM-5 molecular sieve is effectively shortened, and the energy consumption is reduced.

The utility model discloses a hydraulic type earth-rock mixture large-scale triaxial test sample preparation device which comprises a triaxial compression tester, a test area of the triaxial compression tester is communicated with a test area of an axial hydraulic system through a track, and a movable sample preparation device table is installed on the track in a sliding mode. A sample preparation protection sleeve, a latex film and a film bearing cylinder are coaxially and sequentially arranged on the movable sample preparation device table from inside to outside; the axial hydraulic system comprises a hydraulic compressor with a vertically downward output end, a hydraulic hammer is arranged at the output end of the hydraulic compressor, a laser range finder is arranged on one side of the output end of the hydraulic compressor, an induction end of the laser range finder is in induction fit with the hydraulic hammer, and the laser range finder is in linkage fit with the hydraulic compressor; hydraulic rods with vertically downward output ends are arranged on the two sides of the output end of the hydraulic compression instrument, and the tail ends of the hydraulic rods are detachably and fixedly mounted on the top of the sample preparation protection sleeve, so that the success of sample preparation and test is ensured, and a triaxial test is facilitated.

The invention belongs to the technical field of photocatalysis, and particularly relates to a CdS thin film material and a preparation method and application thereof.The preparation method comprises the following steps that a cadmium-containing precursor solution is adsorbed on a substrate, impurities are removed, and a cadmium-containing substrate is obtained; placing the cadmium-containing substrate in a sulfur-containing precursor solution, carrying out a precipitation reaction, and removing impurities to obtain a substrate of which the surface contains CdS seed crystals; the cadmium-containing precursor solution and the sulfur-containing precursor solution are mixed, then the substrate containing the CdS seed crystal is added for a hydrothermal reaction, and the CdS film material is obtained.According to the CdS piezoelectric-photoelectric catalytic nano material prepared through the method, the number of electrons and holes on the surface of CdS can be increased, the photocatalytic degradation efficiency of the CdS piezoelectric-photoelectric catalytic nano material is obviously improved, and the photocatalytic performance of the CdS film material is improved. Two functions, namely photovoltaic and piezoelectric properties, are realized on the same CdS film at the same time, so that the piezoelectric and photoelectric effects of a semiconductor can be fused together, and the subject fusion application in the piezoelectric and photovoltaic fields is realized.

The invention relates to a self-alignment structure, a preparation method thereof and a semiconductor device. The preparation method of the self-aligned structure comprises the following steps: depositing a self-aligned functional film on the first region of the substrate through a selective atomic layer deposition process; and then, through a plasma atomic layer etching process, carrying out etching treatment on a second region, except for the first region, of the substrate. Selective atomic layer deposition and post-processing plasma atomic layer etching are innovatively combined, the purposes of removing ASD defects, improving ASD selectivity and preparing a self-alignment structure without a photoetching process are achieved, and the method has positive significance on preparation of a semiconductor device structure.

The invention belongs to the technical field of material surface engineering, and particularly relates to a simple and efficient preparation method of a multi-scale particle triple-strengthened medium-entropy alloy-based wear-resistant coating. In order to solve the problems that in an existing ceramic particle reinforced metal matrix composite wear-resistant coating, a single-scale reinforced phase is uneven in distribution, and the strengthening effect is limited, the invention innovatively provides a synergistic strengthening mechanism based on additional particles and in-situ precipitation. A multi-scale carbide enhancement system is constructed in a CoNiV medium-entropy alloy matrix through a laser cladding technology, and the principle of the multi-scale carbide enhancement system is elaborated; through unique configuration of a laser cladding original material system and advancement of a strategy method, it is ensured that WC particles are moderately dissolved in a CoNiV medium-entropy alloy matrix, and meanwhile the integrity of the original morphology of the WC particles is reserved; and submicron V-C spherical particle precipitates and quasi-continuous (V, W) C precipitated phases on crystal boundaries are precipitated in situ in the coating matrix, and triple synergistic strengthening is achieved, so that the surface hardness and wear resistance of the metal material are remarkably improved.

This application provides a biomimetic mineralized hydrogel, relating to the field of medical polymer materials. The biomimetic mineralized hydrogel provided in this application uses a biodegradable polymer containing carboxylate groups as a mineralization template, and phosphate-containing small molecules as strong ligands and phosphate donors, inducing Fe... 3+ In-situ mineralization forms stable iron-bearing mineralized crystals, achieving Fe³⁺ + Long-term, low-dose sustained release, thereby delivering Fe 3+ The concentration is maintained within a safe window to allow it to exert its positive bioregulatory effects while avoiding the risks of iron overload-induced oxidative damage and ferroptosis. Simultaneously, it slows the release of Fe³⁺. + It can regulate cellular iron metabolism and activate antioxidant stress-related pathways, inhibit ferroptosis, and create a favorable repair microenvironment for osteochondral regeneration. Experimental results show that this hydrogel not only has excellent flexibility, biocompatibility, antibacterial properties, and angiogenesis-promoting properties, but also promotes osteogenic and chondrogenic differentiation of cells, thereby achieving an integrated osteochondral repair effect.

The invention provides a supported nano palladium-gold catalyst and a preparation method thereof. The nano Au particles and nano Pd particles on the supported nano Pd-Au catalyst prepared by the invention are uniformly loaded and highly dispersed, and are easy to prepare on a large scale. The supported nano palladium-gold catalyst prepared by the invention has a good catalytic effect, can achieve full conversion of CO at -30°C, has good sulfur resistance and stability, and can still maintain a space velocity of 1346 h after SO2 treatment for 1 h and H2S treatment for 1 h. ‑1 , the CO concentration of 20000 ppm is maintained within a conversion rate drop of less than 2% in 726 minutes; the supported nano Pd-Au catalyst prepared by the present invention can be widely used in an environment where sulfides exist and can maintain long-term stability.

The application belongs to the technical field of battery separator, and particularly relates to an ultrasonic cavitation slurry making method for super-thin heat-resistant coated separator. The method comprises the following steps: raw material pretreatment, ceramic particles, a binder and a dispersing agent are added into deionized water to obtain a premix liquid by stirring; ultrasonic cavitation pretreatment, the premix liquid is sent into an ultrasonic cavitation reaction tank, and the initial agglomerates of the ceramic particles are broken by cavitation bubbles generated by ultrasonic waves to obtain a primary dispersed slurry; synergistic fine dispersion, the primary dispersed slurry is sent into a low-speed sand mill for fine dispersion to obtain a fine dispersed slurry; slurry storage, the coating slurry after slurry making is sent into a storage tank for low-speed stirring and storage. The ultrasonic cavitation technology and the low-speed sand mill are synergistically used, the ultrasonic cavitation parameters are accurately matched with the characteristics of the coating separator slurry, the ceramic particles are uniformly and efficiently dispersed, and the high-quality slurry suitable for the super-thin heat-resistant coated separator is prepared.

The invention relates to a method for rapidly preparing a high-performance GeTe-based block thermoelectric material. The method for rapidly preparing the GeTe-based block thermoelectric material comprises the following steps: firstly, weighing raw material powder elementary substance Ge powder, Te powder and Sb powder according to the stoichiometric ratio of GeTe or Ge0. 9Sb0. 1Te; then, in a high-purity argon gas environment, the raw material powder is placed in a ball milling tank to be refined and mixed; and finally, performing spark plasma sintering on the powder obtained by mixing in a vacuum environment at an extremely high temperature rise speed to form a solid thermal explosion reaction, so that the reaction and sintering are performed at the same time, the high-performance GeTe-based block thermoelectric material is obtained within 2 hours, and the dimensionless thermoelectric figure of merit zT at 750K can reach 1.8.

The application discloses an oil core microcapsule preparation device and a drop forming method, wherein the oil core microcapsule preparation device comprises a drop head module, a vibration element, an oil phase channel, an aqueous phase channel, a cooling phase channel, a cooling forming pipe, a collection box and a cooling box; the drop head module comprises an oil phase inlet, an aqueous phase inlet, a cooling phase inlet, an oil phase drop head, an aqueous phase drop head, a cooling phase shunt and a cooling liquid outlet; the vibration element comprises a reciprocating motor, an eccentric shaft connecting rod, and the lower end of the eccentric shaft connecting rod is above the oil phase channel; the upper end of the cooling forming pipe is connected with the outlet, and the lower end extends into the collection box; and the cooling box is arranged below the collection box. The application is favorable for improving the preparation speed and stability of the oil core microcapsule, the size uniformity of the oil core microcapsule, and effectively improving the quality of the oil core microcapsule product.

The present invention relates to an electrochemically driven color-changing and deformable dual-response actuator and a preparation method thereof, wherein the actuator uses a polyvinylidene fluoride gel electrolyte containing lithium salt as an intermediate layer, and color-changing and deformable dual-network structure films are arranged on both sides; wherein the color-changing and deformable dual-network structure film is a single-walled carbon nanotube conductive layer loaded with vanadium pentoxide nanowires. The present invention has good optical properties and actuation properties, fast conversion rate, and good flexibility, which makes it have broad application prospects in sensing, anti-counterfeiting, fabric display, camouflage and even military fields.

The invention relates to the technical field of polymer fibers, in particular to a cutting-resistant ultra-high molecular weight polyethylene fiber and a preparation method thereof.The cutting-resistant ultra-high molecular weight polyethylene fiber is prepared from organic silicon modified ultra-high molecular weight polyethylene and polyphenyl ether modified ultra-high molecular weight polyethylene as raw materials, and the performance of the fiber can be improved; the introduction of the organic silicon can enhance the flexibility and wear resistance of the material, the modification of the polyphenyl ether can improve the strength and rigidity of the material, and the modification of the organic silicon and the modification of the polyphenyl ether are favorable for improving the thermal stability and aging resistance of the material, so that the material can keep excellent performance in a high-temperature or severe environment; and secondly, the graphene oxide modified by the silane coupling agent, the carbon fibers and the hollow glass beads are added in the preparation of the ultra-high molecular weight polyethylene fiber, and the carbon fibers and the graphene oxide are used as high-strength and high-modulus fillers, so that the tensile strength and the cutting resistance of the fiber can be remarkably improved.

The present invention discloses a device for boiling and preparing plasters, which relates to the field of plaster processing, including a boiling pot, a base, an electric heater, a first hinge, a storage groove and a support plate, wherein an electric heater is fixedly installed in the middle of the base, a first hinge is movably installed on one side of the top of the base, the top of the first hinge is movably connected to one side of the bottom of the boiling pot, a cylinder is fixedly connected to the top of one side of the support plate, a second hinge is movably installed in the middle of one side of the boiling pot, and one end of the cylinder is movably connected to the second hinge. After the plaster in the boiling pot is boiled, the boiling pot can be driven to rotate by the cooperation of the cylinder and the first hinge, and the boiled plaster can flow out by opening the valve and be collected through the storage groove, which is convenient for subsequent processing and use, and the gas during boiling can be transported outwards through the exhaust pipe and the connecting pipe, and the gas is filtered through the water tank.