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41results about How to "Avoid uneven growth" patented technology
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High-yield cultivation method for winter wheat in Huanghuaihai region
ActiveCN104663239AIncrease productionImprove survival ratePlant cultivationCultivating equipmentsDiseasePotassium
The invention relates to a high-yield cultivation method for winter wheat in the Huanghuaihai region. The high-yield cultivation method comprises the following five main steps: (1) performing soil preparation and sowing; (2) managing before winter; (3) managing in spring; (4) managing in middle and later stages; and (5) harvesting. According to the technical mode of selecting a winter variety, returning straw to the field, applying fertilizers, performing deep loosening and deep digging, performing rotary tillage and soil preparation, performing broad accurate sowing, mechanically pressing, watering in winter, backwards shifting nitrogen fertilizers, spraying once to prevent pests and diseases, dry and hot wind and lodging, and mechanically harvesting, the high-quality wheat variety which is high in yield, stable in yield and strong in lodging resistance is selected, the soil fertility is raised, seeds are sowed at proper time, the proper pre-winter management is performed, the survival rate of the wheat seedlings is increased, and the uneven growth is prevented; organic fertilizers and inorganic fertilizers are reasonably combined, the technology of backwards shifting the nitrogen fertilizers and applying potassium in stages is applied, the nutrient needs of the wheat at different stages are sufficiently guaranteed, a reasonable group structure is established, the spikelet floret degeneration is reduced, the kernels per spike are increased, the functional period of green leaves is prolonged, the grain filling is promoted, the thousand seed weight is increased and the high-yield breakthrough is realized.
Owner:SHANDONG AGRI SUSTAINABLE DEV INST
Preparation method of unbonded-phase ultrafine WC hard alloy
Owner:CENT SOUTH UNIV
Self walking type quantitative equal-distance seeding device for agricultural production
InactiveCN108184387AReasonable structureInnovative designSeed depositing seeder partsRegular seed deposition machinesDrive motorAgricultural engineering
The invention discloses a self walking type quantitative equal-distance seeding device for agricultural production. The seeding device comprises a walking frame, wherein support frames are arranged atthe two sides of the upper end of the walking frame; a support plate is arranged at the upper ends of the support frames; the right end of the upper end of the support plate is connected with an installing seat through screw bolts; the upper end of the installing seat is provided with a driving motor; a driving belt wheel is arranged in the middle part of the front end of the driving motor; a seed hopper is arranged in the middle part of the support plate; a fixed tube is arranged at the bottom end of the seed hopper; a discharging pipe is arranged at the bottom end of the fixed tube; the lower end of the discharging pipe is provided with a seeding pipe; a baffle plate is arranged inside the upper end of the seeding pipe; a guide rod is arranged at the right end of the baffle plate; a rotating shaft is arranged in the middle part of the lower end of the support frame at the right side; a first driven belt wheel is arranged in the middle part of the rotating shaft; a driving box is arranged at the right side of the lower end of the walking frame. The self walking type quantitative equal-distance seeding device has the advantages that the intermittent walking on the whole device isrealized, so that the peanut seeding space is ensured; meanwhile, the quantitative seeding on the peanut is also realized; the generation of a phenomenon of spare and uneven growth of the peanut can be avoided.
Owner:沈德旭
Aluminum foil for electric cable and production method
InactiveCN101383200AReduce burning lossReduce segregationNon-insulated conductorsInsulated cablesMagnesiumMaterials science
The invention discloses a cable aluminum foil and a production method thereof. The cable aluminum foil comprises components of the following weight percent: 0.79 to 0.83 percent of Si, 0.22 to 0.26 percent of Fe, at most 0.1 percent of Cu, at most 0.2 percent of Mn, at most 0.05 percent of Mg, at most 0.05 percent of Cr, at most 0.1 percent of Zn, at most 0.08 percent of Ti, at most 0.05 percent of single impurity content, at most 0.15 percent of the total content of impurities and Al as the rest, wherein the content summation of the Fe and the Si in weight percent is less than 1.1 percent. The production method comprises the production technical processes: burdening, melting, component analysis, feeding dilution, powder injection refining, N2 refining, on-line refining outside a furnace, casting, casting plate type detection, blank winding, cold rolling, vertical cutting and splitting, finished product annealing, detection, packing, storage and leaving a factory. The cable aluminum foil has good mechanical property, the tensile strength is from 90 to 105MPa, the extension rate is greater than 25 percent, the production requirement has larger development potential, and the enterprise benefit and the social benefit can be obviously increased.
Owner:河南省银湖铝业有限责任公司
Agricultural fertilization device
InactiveCN109107408AWell mixedImprove efficiencyTransportation and packagingRotary stirring mixersAgricultural engineeringLeft wall
The invention relates to an agricultural fertilization device, which comprises a casing and a protection box, wherein the protection box is arranged in the middle part of the outer surface of the leftwall of the casing; a motor is arranged inside the protection box; an output shaft of the motor penetrates through the left wall of the casing to be connected with the left end of a sleeve; a first stirring blade is arranged above the sleeve; a first bevel gear is arranged at the right end of the sleeve; a fixing round tube is arranged in the middle of the inner surface of the bottom of a water tank; the lower end of the fixed round tube is in rotational connection with a bearing; the bearing is fixedly connected in the middle of the inner surface of the bottom of the water tank; second screwthreads are arranged inside the fixed round tube; a cavity is formed inside the sleeve; the upper end of the fixed round tube is provided with a second bevel gear; a rotating rod penetrating throughthe second bevel gear is arranged inside the cavity. The agricultural fertilization device has the advantages that the structure is simple; the practicability is high; the fast mixing can be performedso that the solution is uniformly mixed; the crop growth non-uniformity due to different solution concentration is avoided; the agricultural fertilization device is suitable for being popularized.
Owner:苏州格瑞格登新材料科技有限公司
Anode for electrowinning and electrowinning method using same
ActiveCN103476970ALower potentialReduce the electrolysis voltageElectrodesTitanium electrodeElectrolysis
Provided is an anode for electrowinning such that, in electrowinning using a sulfuric acid-based electrolyte solution, the electric potential for oxygen generation is lower than for a lead electrode, lead alloy electrode, and coated titanium electrode, the electrolysis voltage for electrowinning can be reduced, and the basic units for electric energy can be reduced for a desired metal. This anode can be used as the anode for electrowinning of various types of metal and has superior mass productability. The anode for electrowinning is used in the electrowinning that uses a sulfuric acid-based electrolyte solution, and a catalyst layer that includes noncrystalline ruthenium oxide and noncrystalline tantalum oxide is formed on a conductive base substance.
Owner:DOSHISHA CO LTD
Preparation method of single crystal large particles of ternary material
ActiveCN111600010APrevent uneven particle growthCrystal Form Quality AssuranceElectrode manufacturing processesSecondary cellsLithium electrodeThermal reaction
The invention provides a preparation method of single crystal large particles of a ternary material, and belongs to the field of lithium ion batteries. The preparation method mainly comprises the following steps: (1) mixing the main element raw material of a ternary material, a uniform precipitant, a template agent and a fluxing agent in deionized water according to a certain stoichiometric ratioto obtain a mixed solution; (2) transferring the mixed solution into a reaction kettle, carrying out heat preservation for a period of time at a certain temperature, and carrying out a hydrothermal reaction to obtain a corresponding uniform ternary material precursor; and (3) adding a lithium source into the precursor, and carrying out high-temperature calcination to obtain single crystal particles. According to the invention, urea is used as a uniform precipitant so as to slowly and uniformly release CO3<2-> ions in the solution, so that the phenomenon of non-uniform local distribution causedby directly adding the precipitant from the outside can be overcome; and a template agent and a soluble fluxing agent are uniformly added into a precursor by adopting a hydrothermal method, so that agglomeration can be effectively prevented.
Owner:RISESUN MENGGULI NEW ENERGY SCIENCE & TECHNOLOGY CO LTD
Lanthanum ferrite perovskite material and preparation method and application thereof
InactiveCN113753959AGuaranteed lattice oxygen activationAvoid uneven growthHydrogenIron compoundsNitrateFreeze-drying
The invention discloses a lanthanum ferrite perovskite material and a preparation method and application thereof. The preparation method comprises the following steps: (1) mixing lanthanum nitrate, ferric nitrate and water to obtain a mixed salt solution; (2) mixing the mixed salt solution with citric acid to obtain a precursor solution; (3) performing freezing treatment and vacuum freeze drying on the precursor solution to obtain a lanthanum ferrite precursor; and (4) carrying out calcination treatment on the lanthanum ferrite precursor so as to obtain the lanthanum ferrite perovskite material. The method is simple in process, the lanthanum ferrite perovskite material prepared through the freeze drying method performs lattice oxygen activation on oxidizable organic matter at a high temperature, and meanwhile, metal sites on the surface of the material can catalyze C-H bond breakage of tar components, in-situ removal of gasified tar can be achieved, and the tar components are directionally converted into H2, CO and / or C.
Owner:TSINGHUA UNIV
Soil fertilizer application device with controlled using amount for agriculture
The invention discloses a soil fertilizer application device with a controlled using amount for agriculture. The soil fertilizer application device comprises a vehicle body, wherein four angles of thetop part of the vehicle body are connected with vertically-arranged dampers through bolts; the top parts of the four dampers are connected with the same mounting frame through the bolts; the inner top end of the mounting frame is connected with a storage box through a bolt; the bottom end of the storage box is connected with a lower closure head through a flange; and the inner walls of the two sides of the storage box are connected with a horizontally-arranged rotating shaft through bearings. According to the soil fertilizer application device disclosed by the invention, fertilizer can be scattered and mixed through a stirring rod; due to vibration produced by working of a gasoline engine, blocking of a filter screen plate can be effectively avoided, so that the fertilizer can be mixed more uniformly; meanwhile, the discharging stability of the fertilizer application device is improved; the fertilizer filled with the lower closure head can be uniformly distributed into two distribution bins through a division impeller; and by adjusting the power of the gasoline engine, the application amount of the soil fertilizer can be controlled, so that accurate fertilizer application is achieved, and the fertilizer application efficiency is improved.
Owner:李保印
Microwave plasma chemical vapor deposition device
The invention relates to a microwave plasma chemical vapor deposition device. The device comprises a waveguide device, a reaction cavity and a rotating, lifting and cooling mechanism, wherein the waveguide device comprises a microwave antenna, and the microwave antenna comprises an air inlet pipe, a water cooling structure, an antenna lower disc and an air distribution disc; the reaction cavity isarranged below the waveguide device and connected with the waveguide device, and the antenna lower disc is positioned in the interior of the reaction cavity; the rotating, lifting and cooling mechanism comprises a main shaft, a lifting mechanism, a rotating mechanism and a cooling mechanism; and the top end of the main shaft is connected with a growth platform arranged in the reaction cavity, andthe lifting mechanism, the rotating mechanism and the cooling mechanism are all connected with the main shaft, so that the growth platform is subjected to water cooling and heat dissipation while themain shaft is driven to drive the growth platform to do linear motion and rotary motion in the reaction cavity. According to the microwave plasma chemical vapor deposition device, the stable growth platform can be provided for the chemical vapor deposition process, and the phenomenon of uneven growth of a diamond film is avoided.
Owner:XIDIAN UNIV
Control system and control method for diameter of single crystal ingot
ActiveCN107208307AAvoid shakingSmall diameter deviationAfter-treatment apparatusPolycrystalline material growthControl systemCzochralski method
Owner:LG SILTRON
OSLO cooling crystallizer capable of preventing crystal scale
InactiveCN111282308AAvoid dischargeAvoid uneven growthSolution crystallizationCrystallization by component evaporationCirculator pumpMechanical engineering
The invention discloses an OSLO cooling crystallizer capable of preventing crystal scale. The OSLO cooling crystallizer comprises a crystallizer and a cooling device; the cooling device is arranged outside the crystallizer and is communicated with the crystallizer through a pipeline, the crystallizer comprises a raw material feeding pipe, a crystallization chamber and an arc-shaped baffle with anupward opening, the raw material feeding pipe enters the crystallization chamber through the top of the crystallization chamber, and an outlet of the raw material feeding pipe extends into the crystallization chamber; an opening of the arc-shaped baffle plate is arranged upwards and is positioned below an axis extension line of the raw material feeding pipe; the cooling device comprises a circulating pipeline, a circulating pump and a cooler, the crystallization chamber is communicated with the cooler through the circulating pipeline, and the circulating pump is arranged on the circulating pipeline; a nano fluorocarbon coating layer is arranged on the inner wall of the tube pass of the cooler. According to the OSLO cooling crystallizer capable of preventing crystal scale, the problems of scaling of crystals on the inner wall of the tube pass of a cooler and even blockage of a pipeline in the cooling process are solved, the operation efficiency of the device is improved, and the failurerate is reduced.
Owner:宁夏贝利特生物科技有限公司 +2
Retractable indoor flower culture sill
InactiveCN108618507AAvoid wastingAvoid affecting growthSelf-acting watering devicesFlower holdersEngineeringSunlight
Provided is a retractable indoor flower culture sill. The flower culture sill includes a circular pipe, the upper end of the circular pipe is sealed, a middle bearing on the top side of the inner wallof the circular pipe is connected to the upper end of a vertical shaft, a rotating shaft of a motor is fixedly connected to the lower end of the vertical shaft, the periphery of the motor is fixedlyconnected to the inner wall of the lower portion of the circular pipe, and first gears are fixedly installed on the upper portion and lower portion of the vertical shaft respectively; first strip-shaped through grooves which are symmetric in the horizontal direction are formed in the left and right sides of the circular pipe, and gear columns are arranged in the first strip-shape through grooves respectively; the upper and lower ends of the gear columns are connected to upper or lower bearings of the corresponding first strip-shaped through grooves respectively, and the first gears are cooperatively meshed with the gear columns respectively. The height of flowerpots can be adjusted according to the height of rays cast by sunlight permeating into the sill in different seasons so that cultured flowers can stay at optimal illumination positions, and waste of resources due to frequent replacement of flower stands are avoided.
Owner:YANCHENG INST OF IND TECH
Automatic irrigation device for agricultural planting
InactiveCN112119878AIncrease the areaAvoid inconvenienceTransportation and packagingRotary stirring mixersFertilizerPesticide
The invention relates to the technical field of agricultural production, and discloses an automatic irrigation device for agricultural planting. The automatic irrigation device comprises irrigation water pipes, wherein a water guide pipe I is fixedly connected to the left ends of the irrigation water pipes; a stirring barrel is fixedly connected to the left end of the water guide pipe I, supporting rods are fixed to the top of the stirring barrel, and a storage box is fixedly connected to the tops of the supporting rods; a water guide pipe II is fixedly connected to the left side of the stirring barrel, and a centrifugal filter is fixedly connected to the lower end of the water guide pipe II; and a water guide pipe III is fixedly connected to the left side of the centrifugal filter, a water pump is fixedly connected to the lower end of the water guide pipe III, a water collecting pool is placed at the lower end of the water guide pipe III; and a water storage pool is placed on the leftside of the water collecting pool. According to the automatic irrigation device for agricultural planting, the water pump is adopted for pumping water, the water is conveyed to the stirring barrel through filtering, fertilizer or pesticide can be stirred in the stirring barrel, and finally, the mixed water is used for irrigation through the pipelines, so that the irrigation and fertilization timeis greatly saved, and more convenience is brought to agricultural production.
Owner:XIAOXIAN JIAJIE FLOUR CO LTD
Tillage and soil preparation homogenizing tillage implement
ActiveCN112655296AImprove job qualityImprove adaptabilitySpadesAgricultural machinesReduction driveAgricultural engineering
The invention relates to a tillage and soil preparation homogenizing tillage implement. The tillage and soil preparation homogenizing tillage implement comprises a power box, two or more rotary blades and a plurality of pressing rollers, wherein a reduction gearbox is connected to the middle of the top of the power box, and a speed reducer in the reduction gearbox is powered by an external tractor and drives the rotary blades to rotate; outer rotary blades of the rotary blades are connected to the end part of a rotary tillage connecting plate in an angle-adjustable manner, and inner rotary blades of the rotary blades are connected to the bottom surface of the rotary tillage connecting plate and are positioned on the inner sides of the outer rotary blades; a plurality of pressing rollers are rotatably connected between a front connecting beam and a rear connecting beam behind the rotary blades in a series connection mode, each pressing roller is in a cylinder shape defined by two or more arc-shaped roller bodies, a gap is formed between every two adjacent roller bodies, roller teeth are arranged on each roller body, an inner supporting piece and an outer supporting piece are connected with the roller bodies and serve as a center disc of a rotating center in a sleeved mode, positioning bolts arranged in the radial directions of the pressing rollers are arranged between a sealing plate at the end of the inner supporting piece and a middle plate of the outer supporting piece in a penetrating mode, and a spring is arranged at the portion, between the sealing plate and the middle plate, of the positioning bolt in a sleeving manner.
Owner:QINGDAO TECHNOLOGICAL UNIVERSITY
Microwave plasma chemical vapor phase deposition device
PendingCN111910170AAvoid the problem of unsatisfactory film forming effectAvoid uneven growthChemical vapor deposition coatingEngineeringElectromagnetic radiation
The invention relates to a microwave plasma chemical vapor phase deposition device. The device comprises a waveguide device, a reaction cavity, a cooling shade, a shielding shade, and a rotary liftingmechanism; the reaction cavity is arranged below the waveguide device and is connected with the waveguide device; the cooling shade is connected with the reaction cavity and is used for carrying outair cooling heat dissipation on the reaction cavity; the shielding shade is arranged on the outer part of the reaction cavity in a surrounding manner so as to prevent electromagnetic radiation leakagefrom the reaction cavity; and the rotary lifting mechanism is connected with a growth platform arranged in the reaction cavity, so that the growth platform can make linear motion and rotary motion inthe reaction cavity. According to the microwave plasma chemical vapor phase deposition device, a stable growth platform can be provided for a chemical vapor deposition process, and the phenomenon that uneven growth of diamond films is avoided.
Owner:山西云矽电子科技有限公司
Tobacco floating seedling raising plant pulling under-film transplanting method
InactiveCN113711880AImprove performanceStable structureBiocidePlant growth regulatorsNicotiana tabacumNutrient
The invention discloses a tobacco floating seedling raising plant pulling under-film transplanting method, and belongs to the technical field of tobacco planting. The tobacco floating seedling raising plant pulling under-film transplanting method comprises the following steps of (1) preparation of a seedling raising substrate; (2) seed pretreatment; (3) sowing; (4) seedling stage management; and (5) seedling transplanting. According to the tobacco floating seedling raising plant pulling under-film transplanting method, the seedling raising substrate is specifically prepared, during seedling raising, nutrients are slowly and durably released, in addition, transplanting is conducted in time, remaining seedlings can still obtain balanced nutrients from the substrate, repeated fertilizer adding and water changing are not needed, seed pretreatment is conducted before sowing, the germination characteristics of seeds are improved, the germination time of the seeds is shortened, intermittent sound-light wave coupling treatment is carried out before seedling transplanting, cell division and differentiation are promoted, the resistance of the seedlings is enhanced, and the phenomenon of uneven seedling development is avoided through comprehensive treatment; and in addition, the problem of non-uniform growth speed caused by non-uniform light sources in the seedling growth process can be avoided, the survival rate of the seedlings is increased, the transplanting frequency is reduced, and manpower and material resources are saved.
Owner:HENGYANG COUNTY BRANCH HENGYANG COMPANY OF HUNANTOBACCO
Nanometer LiZn ferrite material
The invention discloses a nanometer LiZn ferrite material. A mole ratio of Fe(NO3)3.9H2O to Zn(NO3)2.6H2O to LiNO3 is (42-48):(5-7):(6-8); a mole percentage of C6H8O7.H2O is 48-54% based on a mole sum of NO<3><-> of Fe(NO3)3.9H2O, Zn(NO3)2.6H2O and LiNO3; and the mass percentage of Bi2O3 is 0.6-0.7% based on a mass sum of Fe(NO3)3.9H2O, Zn(NO3)2.6H2O, LiNO3, and C6H8O7.H2O. The nanometer LiZn ferrite material is prepared by preparing a matrix solution from Fe(NO3)3.9H2O, Zn(NO3)2.6H2O, LiNO3, and water; preparing a complexing agent solution from C6H8O7.H2O and water; mixing the matrix solution and the complexing agent solution and adding Bi2O3; adjusting a pH value to obtain a mixed solution; stirring the mixed solution at a constant temperature to obtain sol; drying the sol to obtain xerogel; performing self-propagating combustion; and performing moulding and sintering.
Owner:ANHUI HUALIN MAGNETIC TECH
Method for synchronous fermentation of bacillus liquid for use in microbial manure
ActiveCN1970736BImprove sleepingHelps break dormancyBacteriaMicroorganism based processesSporeMicroorganism
Owner:BEIJING DANLU INDAL
Tobacco floating seedling raising plant pulling under-film transplanting method
ActiveCN114830982AImprove performanceStable structureBiocidePlant growth regulatorsNicotiana tabacumDividing cell
Owner:HENGYANG COUNTY BRANCH HENGYANG COMPANY OF HUNANTOBACCO
Control method of heating stage in linear guide rail isothermal normalizing
InactiveCN109423539AEvenly heatedAvoid blind spotsFurnace typesHeat treatment process controlHeating timeEngineering
The invention discloses a control method of a heating stage in linear guide rail isothermal normalizing. The control method aims to realize uniform control of heating of normalizing of batched linearguide rails. Compared with a traditional technology, the method is characterized in that firstly, a heating furnace is preheated, linear rail steel is sent to the heating furnace until the temperaturereaches 900 DEG C so that the problem that crystal grains are not uniform in growth in the austenite transformation process due to the facts that the heating time of the linear rail steel are too long and the temperature rise of the initial section heating furnace is not stable can be solved; and meanwhile, the linear rail steel in the heating furnace is controlled to be uniformly distributed atintervals so that all the linear rail steel can be uniformly heated without a dead angle.
Owner:南京雄豹精密机械有限公司
Planting device for garden engineering and use method of planting device for garden engineering
InactiveCN111373953AImplement position swapAvoid uneven growthGeneral water supply conservationPressurised distribution of liquid fertiliserAgricultural scienceAgricultural engineering
The present invention discloses a planting device for garden engineering and a use method of the planting device for garden engineering and belongs to the technical field of garden engineering. The planting device for garden engineering comprises a base seat, a fixed column and a rainwater collecting tank fixed at a top end of the fixed column, three groups of flowerpot placing devices are arranged on an outer wall of the fixed column, each group of flowerpot racks comprises two symmetrically arranged flowerpot racks, an inserting block is fixed on a side wall of one side of each flowerpot rack, a limiting fixing device for limiting the inserting block is arranged in each limiting groove, a rotating limiting mechanism for limiting the fixed column is also arranged at a bottom part in the base seat, and a plurality of nutrient slow-release balls are arranged in the rainwater collecting tank. The planting device can realize position exchanges of the flowerpots on two sides, so that flowers in the flowerpots on the two sides can be fully illuminated, a phenomenon of uneven growth caused by insufficient illumination on one sides of plants can be avoided, besides, waste of nutrients canbe effectively avoided, artificial addition of the nutrients is also not needed, and garden planting efficiency is improved.
Owner:张乐巧
A preparation method of multiple metal nanostructures
ActiveCN105692546BInhibit sheddingRealize precise regulationMaterial nanotechnologyNanostructure manipulationParticle growthNanostructure
The invention relates to a preparing method for a diversified metal nanostructure. The preparing method includes the following steps that 1, a single dispersed gold nanoparticle solution is synthesized; 2, a Si / SiO2 substrate is modified; 3, gold nanoparticles are assembled on the surface of the Si / SiO2 substrate; 4, the surface of the Si / SiO2 substrate is coated to accurately control a particle growth size polymer (poly isopropyl acrylamide) to form a protective film on the surface; 5, a metal nanoparticle growth solution is prepared; 6, the Si / SiO2 substrate coated with the film on the surface is soaked in the growth solution so that the metal nanoparticles can grow to obtain the diversified metal nanostructure. In this way, the growth solution can be evenly dispersed onto the surfaces of seed crystal, disorderly and nonuniform growth of the particles can be stopped, the grown nanoparticles can be effectively prevented from falling off, and growth of the nanoparticles is accurately regulated and controlled.
Owner:SUZHOU UNIV
Seedling raising equipment capable of automatically controlling temperature for traditional Chinese medicinal material planting
PendingCN113875457AAchieve three-dimensional seedling workImprove seedling efficiencyClimate change adaptationGreenhouse cultivationEngineeringEnvironmental geology
Owner:湖南益芝通生物科技有限公司
A magnetic biofilter
ActiveCN104829041BGood adhesionHigh activityMultistage water/sewage treatmentBiofilm growthFiltration
Owner:云南傲远市政建设工程有限公司
Preparation method of tabular corundum phase aluminum oxide powder for electronic material polishing
ActiveCN103553096BHigh hardnessNot to be scratchedAluminium oxides/hydroxidesWaferingAluminium hydroxide
The invention discloses a preparation method of flaky corundum phase alumina powder for electronic material polishing. Firstly, aluminum hydroxide is rapidly dehydrated at a certain temperature to generate rhodium phase alumina; fluoride, boric acid and aluminum hydroxide are proportionally The powder additive is obtained by mixing and grinding; the mixed material is obtained by mixing the powder additive in proportion to the ρ-phase alumina; the mixed material is calcined at 1450-1600°C for 2-12 hours, and then ground, classified and dried , you can get flaky corundum phase alumina powder with a single particle crystal thickness of 1-2 microns and a diameter of 8-25 microns. The powder particles prepared by the method of the present invention have low Na2O impurity content, high corundum phase content, and have a special hexagonal sheet structure. When used as abrasives, they can always be in a state of surface-to-surface combination with the processed surface during the grinding and polishing process. , to achieve the effect of grinding and polishing, and meet the technological requirements of polishing electronic materials such as silicon wafers and electronic flat glass.
Owner:郑州玉发精瓷科技有限公司
Isothermal normalizing process for Fe-Si alloy steel
The invention discloses an isothermal normalizing process for Fe-Si alloy steel, and relates to the technical field of alloy steel heat treatment, the isothermal normalizing process comprises the following steps: S1, heating and heat preservation; s2, quick cooling; s3, isothermal treatment; and S4, cooling after isothermal treatment. According to the isothermal normalizing process for the Fe-Si alloy steel, an existing isothermal normalizing process is improved to a great extent, magnetic field treatment is carried out in the heat preservation stage of heating and heat preservation, uneven growth of crystal grains is avoided through magnetic field treatment, the crystal grains are refined through magnetic field treatment, the influence of temperature factors on crystal grain growth is reduced, and the quality of the Fe-Si alloy steel is improved. Liquid nitrogen is adopted for rapid cooling, the effect of uniform and rapid cooling is achieved by means of the cavitation effect, the acoustic streaming effect and other effects of ultrasonic waves, the structure uniformity is further improved, finally isothermal treatment and equal greeting treatment are conducted, and at the moment, the grain uniformity, the structure uniformity and refinement and the temperature controllability are improved immediately; and therefore, the performance of the Fe-Si alloy steel is effectively improved.
Owner:马鞍山市鑫龙特钢有限公司
A retractable indoor window sill for planting flowers
InactiveCN108618507BAvoid wastingAvoid affecting growthSelf-acting watering devicesFlower holdersGear wheelWindow sill
Owner:YANCHENG INST OF IND TECH
A kind of preparation method of single crystal large particle of ternary material
ActiveCN111600010BAvoid uneven growthEvenly distributedElectrode manufacturing processesSecondary cellsPhysical chemistrySingle crystal
The invention provides a method for preparing large single crystal particles of ternary materials, which belongs to the field of lithium ion batteries. The preparation method mainly includes the following steps: (1) mixing the main element raw materials of the ternary material, a uniform precipitant, a templating agent, and a fluxing agent in deionized water according to a certain stoichiometric ratio to obtain a mixed solution; (2) mixing the mixed solution Transfer to the reaction kettle, keep it at a certain temperature for a period of time to carry out hydrothermal reaction to obtain the corresponding uniform ternary material precursor; (3) the precursor is added to the lithium source and then calcined at a high temperature to obtain single crystal particles. The present invention uses urea as a uniform precipitant, which can slowly and uniformly release CO in the solution 3 2‑ The ion overcomes the uneven local distribution caused by directly adding the precipitating agent from the outside; the template agent and the soluble flux are uniformly added to the precursor by the hydrothermal method, which can effectively prevent agglomeration.
Owner:RISESUN MENGGULI NEW ENERGY SCIENCE & TECHNOLOGY CO LTD
Manufacturing method of silicon germanium heterojunction bipolar transistor device
ActiveCN109817522BAvoid thicker side wallsAvoid uneven growthSemiconductor/solid-state device manufacturingSilicon heterojunctionDry etching
The invention discloses a manufacturing method of a germanium-silicon heterojunction bipolar triode device, which adopts non-selective low-temperature germanium-silicon epitaxial growth, undergoes deposition and etching of sacrificial emitter polysilicon, and dry etching of the outer wall , Wet etching and cleaning, using the selective epitaxial method to form an elevated outer base region and outer wall, and then etch back the sacrificial emitter polysilicon, after cleaning, deposit the emitter polysilicon and dry etch, and finally form the emitter A self-aligned device in which polysilicon and polysilicon in the base area are separated by side walls; compared with the prior art, due to the use of primary side walls, smaller side walls can be formed, which can effectively reduce the series resistance of the base to improve The highest oscillation frequency of the device.
Owner:SHANGHAI HUAHONG GRACE SEMICON MFG CORP
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