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PHA / PVA nanoscale paper-based barrier emulsion as well as preparation method and application thereof
The invention discloses a PHA / PVA nano-scale paper-based barrier emulsion as well as a preparation method and application thereof. The water-based emulsion comprises PHA particles with the average particle size ranging from 100 nanometers to 300 nanometers and PVA, the PHA and the PVA are blended according to a specific proportion, and the PVA serves as a main film forming component and a barrier property contribution component and is blended with the PHA to form the nano-emulsion. The preparation method comprises the following steps: mixing PHA particles with an initial average particle size of 1-100 microns with a PVA aqueous solution, and carrying out high-pressure homogenization and other nanocrystallization means to obtain the nano-emulsion. The emulsion can be coated on the surfaces of paper-based materials such as paper and paperboards, and a barrier coating is formed after the emulsion is dried. The obtained emulsion is small in particle size, good in stability and good in leveling property, a uniform and compact barrier film is easily formed on a paper base, the film has excellent water vapor, oxygen and grease barrier performance, and the material is bio-based, biodegradable and environmentally friendly.
Owner:DU BAI CHENG NEW MATERIAL TECH (SHANGHAI) CO LTD +1
Sulfide electrolyte and preparation method thereof, solid-state battery and electronic equipment
PendingCN119275332AIncrease the effective contact areaincrease profitPhosphorus halides/oxyhalidesPhosphorus sulfur/selenium/tellurium compoundsElectrical batteryPhysical chemistry
The invention provides a sulfide electrolyte and a preparation method thereof, a solid-state battery and electronic equipment, the median particle size D50 and the specific surface area of the sulfide electrolyte are 10-5000 nm and 1-15 m < 2 > / g respectively, and the particle size distribution of the sulfide electrolyte meets the condition that (D90-D10) / D50 is greater than or equal to 0.9 and less than or equal to 2. The sulfide electrolyte provided by the invention is relatively small in particle size, relatively narrow in particle size distribution and relatively small in specific surface area, and the electrochemical performance of a solid-state battery can be effectively improved.
Owner:NINGBO RONBAY LITHIUM BATTERY MATERIAL CO LTD
Feed proportioning process for breeding grilled meat ducks
The invention relates to the technical field of feed proportioning devices, in particular to a feed proportioning process for grilling type meat duck breeding, a stirring barrel comprises a filter screen, an emulsifying cavity, a spray head and the like, grease and water are fully emulsified through a first stirring shaft in the emulsifying cavity, and uniform oil liquid is formed; and the emulsified oil liquid is uniformly sprayed to the surfaces of the large-particle raw materials through a plurality of spray heads, so that the grease is prevented from being absorbed and clustered by the powdery materials, the mixing effect of the grease and the feed is ensured to be more uniform, and the quality and digestion and absorption effects of the feed are improved. Large-particle materials and small-particle materials are reasonably separated by matching with the arrangement of a filter screen, so that the two materials can be respectively treated in the premixing cavity and the stirring cavity in the stirring barrel.
Owner:HEBEI DONGFENG BREEDING CO LTD
Device and process for preparing outdoor durable powder coating
PendingCN120459864ARotary stirring mixersTransportation and packagingMechanical engineeringPowder coating
The invention belongs to the technical field of coating production, and particularly discloses an outdoor durable powder coating preparation device and a preparation process thereof.The outdoor durable powder coating preparation device comprises a bridging column, a mixing barrel is fixed to the top of the bridging column, a discharging sleeve is arranged at the bottom of the bridging column, and a stirring device is arranged at the top of the bridging column; a transmission cavity penetrating to the bottom is formed in the bridging column, and a material conveying assembly is arranged in the transmission cavity. According to the device, a powder coating and a liquid solvent are injected into the material mixing barrel through the feeding pipe, then the material conveying assembly is driven to work through the driving shaft, and when the material conveying assembly works, stirred fluid in the material mixing barrel can be intermittently conveyed into the discharging sleeve; and then the stirring device is driven to stir the interior of the material mixing barrel while the material conveying assembly works, and the pneumatic assembly is driven to work to atomize and spray out fluid flowing out of the material conveying assembly, so that coated fine particles generated during material mixing are crushed.
Owner:GUANGDONG NONGFU CONSTR ENG CO LTD
Drying filter of air conditioner refrigeration cycle system
The invention relates to the technical field of refrigeration cycle, and discloses a dry filter of an air conditioner refrigeration cycle system, which comprises a shell, a liquid inlet at the front end of the shell and a liquid outlet at the tail end of the shell, and a front filter plate and a rear filter plate are respectively mounted in the hollow annular table in a sliding manner. The space of the front drying cavity is increased, so that when small particles generated by pulverization of a drying agent are led to the rear drying cavity, the drying agent in the rear drying cavity is kept in a compact state at the moment, and it is ensured that the rear drying cavity has the capacity of adsorbing moisture in a refrigerant; when the space of the rear drying cavity is increased, small particles generated by pulverization of the drying agent are discharged out of the drying cavity, at the moment, the drying agent in the front drying cavity is kept in a compact state, and it is ensured that the front drying cavity has the capacity of adsorbing moisture in the refrigerant. Therefore, small particles generated by pulverization of the drying agent can be effectively cleaned, and moisture in the refrigerant can be reliably removed.
Owner:XINCHANG KANGLIDE REFRIGERATION FITTINGS
Sulfide electrolyte membrane with gradient particle size distribution and preparation method and application thereof
ActiveCN120073051ASecondary cellsElectrolyte immobilisation/gelificationElectrical batteryHigh energy
The invention discloses a sulfide electrolyte membrane with gradient particle size distribution as well as a preparation method and application thereof, and relates to the technical field of solid-state batteries. Firstly, a modified binder solution formed by blending polyurethane and butadiene rubber is prepared, a sulfide electrolyte, a modified binder and an organic solvent are prepared into three kinds of slurry with different particle sizes, and the slurry is prepared into a solid-state battery; the preparation method comprises the following steps: sequentially coating on a substrate according to the sequence of average particle sizes of sulfide electrolyte in the slurry from large to small, airing each layer of wet film and then coating the next layer to form a composite wet film with gradient distribution of particle sizes, and carrying out vacuum drying and hot rolling treatment to finally prepare the target electrolyte film. According to the method, a unique particle size gradient design is ingeniously constructed, large particles construct a framework, gaps are filled with small particles, the compactness of a film layer is optimized, and a continuous ion transmission channel is formed. The multi-layer wet film forming process is simple and high in controllability, the rate capability and the cycle life of the sulfide all-solid-state battery can be remarkably improved, and the multi-layer wet film forming process has great large-scale production and application potential in the field of high-energy-density all-solid-state batteries.
Owner:SHANGHAI FIRM LITHIUM NEW ENERGY TECH CO LTD +1
Silicon carbide regulated porous silicon carbide membrane material generated by in-situ reaction and preparation method and application thereof
The invention relates to the field of porous materials, in particular to a silicon carbide regulated porous silicon carbide film material generated through in-situ reaction and a preparation method and application thereof. According to the porous silicon carbide film material blank, a framework is formed by original silicon carbide particle aggregate, a silicon-containing component and a carbon-containing component are contained in macropore gaps formed among particles, and in the sintering preparation process of the film material, the silicon-containing component and the carbon-containing component are subjected to an in-situ reaction to generate nanoscale or submicron silicon carbide crystal grains to fill the macropore gaps and form small pores. The original silicon carbide particles and / or the nano-scale or submicron-scale silicon carbide crystal grains are connected through sintering to obtain a hole-embedded hole structure. The innovation of the invention lies in that sintering among silicon carbide particles is promoted by adopting the activity of in-situ reaction, the problem that the pore structure cannot be regulated and controlled when macropores among aggregate particles in the transition layer of the silicon carbide film material are simply stacked and filled by small particles is solved, and the permeability of the silicon carbide film material is favorably improved.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Crystallization process of small-particle-size palmitic acid paliperidone
The invention belongs to the technical field of crystal compound preparation, and particularly relates to a crystallization process of small-particle-size palmitic acid paliperidone. The invention discloses a small-particle-size palmitic acid paliperidone crystallization process, solves the problems of large particle size, non-uniform distribution and serious agglomeration of the existing process product, and meets the requirements of long-acting injection bulk drugs. The process comprises the following steps: adding paliperidone palmitate into a specific mixed organic solvent according to a solid-to-liquid ratio of 0.04-0.09 g / g, stirring, dissolving and filtering at 65-75 DEG C, transferring into a high-pressure closed crystallizer, and pressurizing to 1.0-1.5 MPa; cooling and decompressing in sections, stirring, filtering and washing, and drying in vacuum at the temperature of 40-50 DEG C and the vacuum degree of-0.1 MPa to obtain a finished product. According to the invention, the process parameters are accurately controlled, the product is an irregular short rod-like / granular crystal, the particle size is in a normal single peak, the Dv (90) is 7.866-9.514 microns, the HPLC (High Performance Liquid Chromatography) purity is greater than or equal to 99.92%, the yield is greater than or equal to 90.25%, micronization is not needed, the process is stable, the economical efficiency is good, and the industrial application value is realized.
Owner:UNIV OF JINAN
Three-axis manipulator particle product filling and stacking device and method
The invention relates to a three-axis mechanical arm particle product filling and stacking device and method.The three-axis mechanical arm particle product filling and stacking device comprises a main body frame, a three-axis mechanical arm module, a weighing module, a vibration filling module, a discharging module and a product stacking module, the discharging module is movably installed on the table top of the main body frame, and a discharging opening of the discharging module can move to the position above the vibration filling module. The three-axis mechanical arm module comprises an X-axis transverse moving mechanism, a Y-axis moving mechanism, a Z-axis moving mechanism and a tail end executing mechanism. The discharging module, the vibration filling module, the weighing module and the product stacking module are all located on the same side of the X-axis transverse moving mechanism and are sequentially arranged in the X direction. According to the invention, the weighing module can be used for weighing the filled product every time, so that the problem of filling micro-particle products according to requirements is solved, and the filling efficiency and the filling qualification rate are improved.
Owner:PUDA DITAI (CHENGDU) INTELLIGENT MFG RES INST CO LTD
N-doped graphene coated silicon-based negative electrode material and preparation method thereof
PendingCN119627069Asmall particle sizeImprove stabilityNegative electrodesLi-accumulatorsMicro nanoCarbon coating
The invention discloses a preparation method of an N-doped graphene-coated silicon-based negative electrode material, which comprises the following steps of: performing carbon coating by using graphene, controlling the particle size of a silicon substrate to be less than 2 microns, and realizing micro-nanocrystallization of a silicon main body material through mechanical ball milling, so that the micro-nanocrystallization silicon material is distributed in a graphite layer while metal-doped silicon monoxide obtains a smaller particle size; according to the preparation method, metal doped silicon monoxide is taken as a silicon source, the surface of the metal doped silicon monoxide is coated with the stripped graphene, the metal doped silicon monoxide is coated with the graphene oxide, finally, a silicon material is further uniformly coated with graphene micro-nanosheets by adopting a rapid spray drying technology, and an electroactive substance is effectively protected from being influenced by volume change caused in the charging and discharging process through the synergistic effect of the graphene micro-nanosheets. The preparation method has the advantages that after the composite material is prepared from micron-sized silicon monoxide and graphene, low-cost preparation of the modified silicon monoxide is realized, the electrode material with excellent electrochemical performance is obtained, the stability of the composite material is effectively improved, the cycle service life is prolonged, and the application and popularization value is relatively good.
Owner:INNER MONGOLIA SHANSHAN TECH CO LTD
Micromirror chip, micromirror device and optical device
PendingCN120423488ATelevision system detailsImpedence networksEngineeringMicroelectromechanical systems
The invention provides a micro-mirror chip, a micro-mirror device and an optical device, and belongs to the technical field of micro electro mechanical systems. The micro-mirror chip comprises a substrate, a micro-mirror array, an electrode, a light window and a fixing ring. The micromirror array is located on the first surface of the substrate, the electrode is located on the second surface of the substrate, and the first surface and the second surface are opposite in position in the thickness direction of the substrate; the fixing ring is fixed on the first surface of the substrate, the micro-mirror array is located in an in-ring space of the fixing ring, and the light window is fixed on the fixing ring and covers the micro-mirror array. In the packaging of the micro-mirror chip, the micro-mirror array is sealed in the sealed space formed by the substrate, the fixing ring and the light window, so that small particles do not fall into the environment where the micro-mirror array is located in the subsequent packaging process, the qualified rate of the packaged micro-mirror device can be improved, and the yield of the packaged micro-mirror device can be improved. Therefore, the yield of the packaged micro-mirror device is improved.
Owner:HUAWEI TECH CO LTD
Waste battery crushing device
ActiveCN119140236Aavoid accumulationreduce frictionWaste accumulators reclaimingGrain treatmentsStructural engineeringKnife blades
Owner:JIANGSU UNIV OF TECH +1
Preparation method and application of ultrathin large-size hexagonal boron nitride nanosheet capable of being produced in large scale
The invention discloses a preparation method and application of an ultrathin large-size hexagonal boron nitride nanosheet capable of being produced on a large scale, and belongs to the technical field of two-dimensional material preparation. The method comprises the following steps: 1, preparing a boron nitride dispersion solution; 2, performing ultrasonic oscillation on the boron nitride dispersion liquid by using an ultrasonic processor; 3, stirring the boron nitride dispersion liquid subjected to ultrasonic pretreatment at an ultra-high speed by using a wall breaking machine; and 4, centrifuging the stirred boron nitride, taking supernate, washing and drying to obtain the ultrathin large-size boron nitride nanosheet. The preparation method disclosed by the invention has the characteristics of simplicity, high efficiency, economy, environmental protection, high yield, high reliability, large-scale preparation and the like, and the prepared boron nitride nanosheet has the advantages of large sheet diameter, small thickness, uniform particles, high lattice integrity and the like, and can be applied to the fields of thermal management, energy storage and photoelectrochemistry of electronic devices.
Owner:HARBIN UNIV OF SCI & TECH
Scratch-resistant water-based paint as well as preparation method and application thereof
ActiveCN119144223AImprove the finishImprove anti-aging propertiesPolyurea/polyurethane coatingsLeather surface finishingCarbide siliconAcrylate ester
The invention belongs to the technical field of waterborne coatings for leather, and discloses a scratch-resistant waterborne coating and a preparation method and application thereof.The scratch-resistant waterborne coating is prepared from, by weight, 80-110 parts of waterborne polyurethane acrylate resin, 0.5-1 part of silicon dioxide, 6-10 parts of aluminum oxide, 0.1-1 part of silicon carbide micro powder, 0.1-0.3 part of a stabilizer, 0.3-0.6 part of a flatting agent and 0.3-0.6 part of a defoaming agent; wherein the particle size of the silicon dioxide is 20-40 nm; the aluminum oxide is divided into first aluminum oxide and second aluminum oxide, the weight ratio of the first aluminum oxide to the second aluminum oxide is (2-3): (7-8), the particle size of the first aluminum oxide is 70-80 nm, and the particle size of the second aluminum oxide is 10-15 nm; the particle size of the silicon carbide micro powder is 10-15 nm. According to the invention, on the basis that the second aluminum oxide with a smaller particle size is compounded with the first aluminum oxide, the silicon carbide micro powder with the same particle size as the second aluminum oxide is added and the silicon dioxide with a specific particle size is compounded, so that the effect of synergistically improving the scratch resistance of the water-based paint can be generated, and the scratch resistance of the water-based paint is remarkably improved.
Owner:QINGYUAN MELESI ENVIRONMENTAL PROTECTION NEW MATERIALS CO LTD
Small-particle-size positive charge conditioning emulsion as well as preparation and hair care application thereof
ActiveCN119454522AImprove the deposition effectUniform depositionCosmetic preparationsHair cosmeticsPolymer scienceSilicone oil
The invention relates to the field of daily chemistry, and discloses a small-particle-size positive charge conditioning emulsion and preparation and hair care application thereof, and the small-particle-size positive charge conditioning emulsion comprises low-viscosity silicone oil, a nonionic emulsifier and a small-molecule cationic quaternary ammonium salt. A small-particle-size emulsion of low-viscosity silicone oil is prepared by utilizing a small-molecular cationic conditioner which is commonly used for hair washing and caring and has conditioning and emulsifying properties, even nano-scale silicone oil is prepared, and the low-viscosity silicone oil does not have the condition that the hair feels heavy after a high-viscosity silicone oil conditioner in the prior art is applied to specific people. The emulsion has small particle size and uniform deposition, and the surface positive charges of the emulsion improve the stability of the emulsion and also improve the deposition property of the low-viscosity silicone oil to a certain extent.
Owner:LAFANG CHINA CO LTD
Microporous layer slurry, microporous layer and fuel cell
The invention discloses microporous layer slurry, a microporous layer and a fuel cell, the microporous layer slurry comprises first carbon powder, second carbon powder and a mixed solvent, the mass ratio of the first carbon powder in the microporous layer slurry is 4-10%, the mass ratio of the second carbon powder in the microporous layer slurry is 2-6%, and the particle size of the first carbon powder is smaller than that of the second carbon powder; the microporous layer slurry is used for being coated on the surface of a substrate layer of the gas diffusion layer to form a microporous layer. Two kinds of carbon powder with different particle sizes are adopted, macropores can be effectively formed in the microporous layer in the process of coating the surface of the substrate layer, effective water and gas channels are established, water and gas transmission balance in the operation process of the fuel cell can be conveniently controlled, a large amount of water generated by the cathode under high power can be efficiently discharged out of the fuel cell, and the fuel cell efficiency is improved. The cathode flooding phenomenon and the anode antipole phenomenon caused by excessive water are avoided to a great extent, and the performance of the fuel cell under high current density can be improved.
Owner:CHINA AUTOMOTIVE INNOVATION CORP
Method for purifying fluorine-containing polymer
The invention relates to a method for purifying a fluorine-containing polymer, belongs to the field of fluorine-containing polymers, and aims to solve the problem that the conventional method for removing impurities in the fluorine-containing polymer cannot achieve a relatively ideal effect, the method for purifying the fluorine-containing polymer comprises the following specific steps: adding the fluorine-containing polymer and a fluorinated solvent into a reactor, and stirring and mixing; a swollen fluorine-containing polymer is obtained; standing until the upper layer and the lower layer are layered, then discharging the solvent on the upper layer, and freezing the swelled fluorine-containing polymer in the lower layer; the frozen fluorine-containing polymer is subjected to crushing treatment, and fluorine-containing polymer powder is obtained; and recovering the solvent, sequentially carrying out acid pickling and water washing on the crushed powder, and drying to obtain the fluorine-containing polymer. The method comprises the following steps: enabling a fluorinated solvent to enter pores of fluorine-containing polymer particles, freezing and crushing to obtain fluorine-containing polymer powder with smaller particle size, and carrying out acid pickling, water washing and other treatments to reduce the impurity content in the fluorine-containing polymer to ppb level, so that the purification effect is obviously improved.
Owner:QUZHOU FUJU ELECTRONIC MATERIALS CO LTD
Pharmaceutical formulation of odevixibat
The invention relates to a pharmaceutical formulation, e.g. a paediatric formulation, of odevixibat, which comprises a plurality of small particles. The formulation may be used in the treatment of liver diseases such as bile acid-dependent liver diseases, and particularly cholestatic liver diseases such as biliary atresia, progressive familial intrahepatic cholestasis (PFIC), Alagille syndrome (ALGS) and paediatric cholestatic pruritus. The invention also relates to a process for the preparation of the pharmaceutical formulation.
Owner:ALBIREO
Non-adhesive flame-retardant coating and heat insulation sheet
PendingCN119242107AImprove flame retardant performanceImprove crack resistanceFireproof paintsPolyurea/polyurethane coatingsPolymer scienceCrack resistance
Based on the total weight of the flame-retardant coating, the flame-retardant coating comprises the following components in percentage by mass: 35%-40% of organic polymer resin, 10%-20% of a flame retardant, 1%-5% of a curing agent and the balance of a solvent. 2%-4% of a cross-linking agent; 0.1% to 0.5% of a surfactant; 8%-10% of pigment and filler; 0.2%-0.5% of a flame retardant; 55%-60% of a solvent; and 0.05%-0.1% of an additive. The non-sticky flame-retardant coating has the beneficial effects that the non-sticky flame-retardant coating has excellent flame retardance and crack resistance, can provide a larger brush coating area due to good covering power, and is small in particle size, not easy to precipitate, fine and smooth in coating hand feeling, good in leveling property, resistant to high temperature and free of after-tack.
Owner:XIAMEN JIAZHI TECH CO LTD
Centrifugal filtering device for solid-liquid mixed liquor
PendingCN120815376AMembrane filtersMoving filtering element filtersLiquid waterMechanical engineering
The invention relates to a centrifugal filtration device for solid-liquid mixed liquor. The filtering device comprises a rack, a liquid inlet channel and a filter, the filter is provided with a filter cartridge capable of rotating around a supporting structure, a collecting shell and a backwashing nozzle are arranged outside the filter cartridge, and a residue receiving container and a residue discharging channel are arranged inside the filter cartridge. Waste liquid is injected into the filter cartridge through the liquid spraying pipe, the filter cartridge rotates to generate centrifugal force, the liquid and fine particles are pushed to be thrown out, separated through the filter screen and collected to the clean liquid water tank, and large particle impurities are attached to the filter screen, removed through the back-flushing spraying head and finally guided out through the residue receiving container and the residue discharging channel. And the discharged impurity mixture flow is further subjected to liquid separation through a two-stage vibrating screen and is subjected to reflux treatment, and solid residues are collected in a centralized manner.
Owner:SHENZHEN RUIGESHENG EQUIP CO LTD
Preparation method of titanium alloy containing rare precious metal elements
PendingCN119392024Awell mixedreduce lossTransportation and packagingMetal-working apparatusTitanium surfaceTitanium alloy
The preparation method of the titanium alloy containing the rare precious metal elements comprises the following steps that raw materials are prepared, specifically, micro-particle sponge titanium with the particle size being 0.5-2 mm is included; rare precious metal powder; industrial alcohol; the particle size of the national standard grade sponge titanium is 3-12.7 mm; mixing the materials for the first time; s201, the surface of the micro-particle sponge titanium is wetted with alcohol and stirred; the micro-particle sponge titanium and rare precious metal powder are evenly mixed according to the mass ratio of (14-15): 1, the rare precious metal powder adheres to the micro-particle sponge titanium, and mixed powder is formed to serve as intermediate alloy; material mixing is conducted again, specifically, the intermediate alloy and the national standard grade sponge titanium are evenly mixed according to the preset mass ratio, and a pre-smelting alloy is obtained; the pre-smelted alloy is fed into a die cavity of a hydraulic machine to be pressed into an electrode block, and the pressure is 50-60 MN; a plurality of electrode blocks are welded into a consumable electrode in a vacuum plasma welding mode, and the pressure of a furnace chamber is 10000-25000Pa; and the consumable electrode is subjected to secondary smelting through a vacuum consumable smelting method, and the titanium alloy is obtained.
Owner:NINGXIA HORIZONTAL TITANIUM IND CO LTD
Liquid epoxy molding compound and preparation method thereof
ActiveUS20240425669A1Non-macromolecular adhesive additivesPlastic recyclingPolymer scienceFirming agent
Disclosed is a liquid epoxy molding compound and a preparation method thereof; the liquid epoxy molding compound includes the following raw materials by mass fraction: an inorganic silicon filler: 83%-88%, a naphthalene-based epoxy resin: 5%-10%, an anhydride curing agent: 5%-10%, and an accelerator: 0.1%-0.5%, where the inorganic silicon filler with a particle size of less than 50 μm-100 μm accounts for 99%; the method includes premixing the naphthalene-based epoxy resin, the curing agent, the accelerator, and the inorganic silicon filler to obtain a mixture; and grinding the mixture to a target particle size, and then performing vacuum degassing to obtain the liquid epoxy molding compound. The small-particle silica is introduced to reduce the increase in length of the liquid epoxy molding compound at the unit temperature during the molding stage.
Owner:HUBEI CHOICE TECH CO LTD
A foundry sand recovery system
The present invention relates to the field of molding sand recovery processing technology, and specifically discloses a casting molding sand recovery system, including a cylinder and two rolling rollers, wherein a material dividing mechanism is arranged in the cylinder, and the material dividing mechanism is arranged in two groups, and each group of material dividing mechanisms comprises a screening component and a separation component, and the screening component comprises a screen plate arranged in the cylinder, and the screen plate gradually tilts downward along the rotation direction of the rolling roller, and the separation component comprises two arc plates and a guide structure arranged in the cylinder, and a crushing channel is formed between the two arc plates; the present invention screens the molding sand through the screen plate, and separates the screened agglomerated molding sand and small-particle-size molding sand through the separation component, so that the rolling roller can carry out targeted crushing of the agglomerated molding sand, and avoid the agglomerated molding sand from sliding during crushing due to the fluidity of fine sand; in addition, the screen plate can send the agglomerated molding sand between the rolling roller and the side wall of the cylinder into the rotation path of the rolling roller, so as to ensure the crushing effect of the molding sand.
Owner:洛阳市钢峰工程机械制造有限公司
Ag-Cu-Ti-based composite brazing filler metal and preparation method and application thereof
The invention relates to the technical field of electronic packaging and welding, and particularly discloses Ag-Cu-Ti-based composite brazing filler metal and a preparation method and application thereof. The composite material comprises the following components in percentage by weight: 87%-96.5% of Ag-Cu28 alloy powder, 3%-8% of TiH2 and 0.5%-5% of a reinforcing phase, and the reinforcing phase is Ag-coated titanide or ceramic particles. According to the method, the comprehensive welding performance of the brazing filler metal is improved by adopting a method of coating the reinforcing phase with Ag, and meanwhile, the negative influence caused by adding the reinforcing phase is overcome. Aggregation of reinforced phase particles can be reduced through Ag coating, uniform distribution of the reinforced phase fine particles in the brazing filler metal is achieved, and generation of large brittle phases is greatly reduced. And meanwhile, the fluidity of the brazing filler metal is enhanced, the joint filling capacity of the brazing filler metal is improved, and the welding voidage of a connector is effectively reduced. In addition, the Ag coating can avoid the reaction between the reinforcing phase and the Ti element, and the influence of the reinforcing phase on the melting point of the brazing filler metal is reduced.
Owner:ENERGY RESOURCES INST HEBEI ACADEMY OF SCI +1
Method for preparing high-purity cristobalite
The present invention relates to the technical field of quartz sand, and particularly relates to a method for preparing high-purity cristobalite, which method comprises: drying, calcining and scattering amorphous silica to obtain high-purity cristobalite. Compared with the prior art, the present invention has the following beneficial effects: 1, the amorphous silica has a relatively large specific surface area, with the surface thereof rich in hydroxyl, the cristobalite is apt to contain pores during the process of converting the amorphous silica into the cristobalite, and in order to eliminate the pores, the present invention uses a coupling agent for surface treatment and then conducts calcination, which results in, as shown in data, significant reduction in hydroxyl; and 2, under the condition of the same mass of the coupling agent, the inventor selects a silane coupling agent having a shorter chain, which results in fewer pores in the cristobalite and reduction in the calcining temperature and time to a certain extent, and possible reasons therefor are that the silane coupling agent is decomposed at a high temperature to form silicon oxide and the silicon oxide formed by decomposition has a smaller particle size and preferentially forms a crystal nucleus, thereby promoting the overall crystal form conversion.
Owner:ANHUI ESTONE MATERIAL TECH CO LTD
Environmental particulate spherical powder and preparation method thereof
The invention discloses environmental particulate spherical powder and a preparation method thereof. The preparation method comprises the following steps: selecting artificially synthesized CMAS powder or natural solid particles as a preparation raw material; the preparation method comprises the following steps: sequentially carrying out ball milling, high-temperature melting, quenching and solid-phase sintering on a CMAS powder raw material to obtain a crystalline CMAS block; the method comprises the following steps: carrying out ball milling on natural solid particles or crystalline CMAS blocks to obtain fine particle powder, and obtaining a high-temperature melting characteristic curve of the fine particle powder; preparing the fine particle powder into slurry, and carrying out spray granulation to obtain powder particles with a target size; the powder particles are subjected to low-temperature sintering to remove the binder, then high-temperature sintering densification treatment is conducted, the environmental particulate matter spherical powder is obtained, and the densification treatment temperature is determined based on a high-temperature melting characteristic curve. The prepared powder has excellent flowability and compactness, the particle size range of the powder is controlled to be 20-500 microns, the spherical powder with concentrated particle size distribution can be obtained after screening, and a high-quality and standardized material can be provided for research of aero-engine related thermal protection technologies.
Owner:TIANMUSHAN LABORATORY +1
Small-particle compound fertilizer, production process and equipment thereof
PendingCN120961054AGranulation by liquid drop formationSolid/semi-solid fertilisersAgricultural engineeringSlurry
The invention discloses a small-particle compound fertilizer, a production process and equipment thereof. The small-particle compound fertilizer is processed by adopting a high-tower granulation process, and the particle size is 1.2-1.8 mm; according to the production process of the small-particle compound fertilizer, the diameter of a spray hole in a granulation spray head is in a range of 1.2-1.8 mm, and the rotation speed of the granulation spray head is not less than 450rpm; the small-particle compound fertilizer production equipment comprises a high tower main body, a liquid supply mixer, a granulation spray head, an air inlet and a collector, and further comprises an air injection assembly which is annular and coaxially arranged on the periphery of the granulation spray head; the air injection assembly is fixed on the bottom surface of a top partition plate in the high tower main body; and the air injection assembly downwards blows compound fertilizer slurry liquid drops thrown out by the granulation spray head in an obliquely downward manner. The compound fertilizer is small in particle, can be rapidly dissolved in water, is high in fertilizer efficiency and can be fully absorbed and utilized by crops.
Owner:HEBEI ZHONGFEI FERTILIZER GROUP CO LTD
Fluorescent whitening agent with high dispersion stability, preparation method and application method
The invention discloses a fluorescent whitening agent with high dispersion stability, a preparation method and an application method, and belongs to the technical field of textile printing and dyeing. The invention introduces a fluorescent whitening agent with the characteristics of small particle size, high stability, strong whitening ability and the like. The fluorescent whitening agent is a dispersion liquid composed of a whitening agent filter cake, a dispersing agent, a solvent, a thickening agent, water and the like. The whitening agent is applied to whitening processing of polyester and blended fabrics thereof, and can show higher whiteness under the condition of lower dosage; and even under the condition that a leveling agent is not added, a uniform whitening effect can be obtained, fluorescent spots or yellow spots are not formed, and high-quality whitened fabric can be obtained.
Owner:NICCA CHEM CHINA CO LTD
Secondary battery positive electrode material, secondary battery positive electrode sheet, and secondary battery
PCT designated stage expiredWO2024244685A1Secondary cellsPositive electrodesCarbon coatingCarbon layer
A secondary battery positive electrode material, relating to the field of battery materials. The secondary battery positive electrode material comprises large particles with a particle size greater than or equal to 2 μm and small particles with a particle size smaller than or equal to 1 μm. The surfaces of some of the small particles are provided with a carbon coating layer; and the surfaces of some of the large particles are not provided with a carbon coating layer. According to the positive electrode material, by means of gradation design of the large and small particles, the effect that the small particles fill gaps left by accumulation of the large particles can be achieved, and then the compaction density is improved. Moreover, the surfaces of the small particles are coated with a carbon layer to provide sufficient electron transport paths, so that a stable electron pathway for the large particles wrapped by the small particles can be maintained in a charge and discharge cycle. Additionally, the surfaces of the large particles with the particle size larger than or equal to 2 μm are not hindered by a carbon coating layer, so that the wetting capacity of an electrolyte to the electrode sheet can be improved, and faster transmission of lithium ions at an interface can be realized, thereby reducing the impedance in a charge and discharge process.
Owner:REPT BATTERO ENERGY CO LTD +1
High-strength alloy formwork assembly and construction method thereof
ActiveCN119593574AExtended service lifereduce workloadForms/shuttering/falseworksAuxillary members of forms/shuttering/falseworksForeign matterStructural engineering
The invention belongs to the technical field of formworks, discloses a high-strength alloy formwork assembly and a construction method thereof, and solves the problems that an existing angle-adjustable formwork can form arc-shaped surfaces at external corners and internal corners, and slurry and fine particles can enter a rotating structure during pouring, so that the service life is greatly shortened. The corner formwork comprises two corner formworks and a rotating structure, sealing strips are installed in installation grooves of the corner formworks, the sealing strips on the two corner formworks extend out of the installation grooves and are in contact sealing with each other, and the side faces, extending out of the installation grooves, of the sealing strips and the working faces of the corner formworks are located on the same plane. And the rotating structure is arranged on the side surface opposite to the working surface of the corner template. Planes can be formed at the external corner and the internal corner, slurry or concrete and the like cannot enter the rotating structure during pouring, and the problem that the rotating structure is damaged due to foreign matter is solved.
Owner:SHAANXI SHOULV ALU FORMWORK TECH CO LTD CO