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40results about How to "Uniform method" patented technology
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Uniform Program Indexing Method with Simple and Robust Audio Feature and Related Enhancing Methods
InactiveUS20080292273A1Simple and robust audio featureUniform methodTelevision system detailsColor television signals processingAudio segmentIndex method
Simple, computational efficient, and robust audio features are applied in a uniform program indexing method for picking up video segments relating to highlight plays in a recorded program worthy of being reviewed. By focusing on certain frequencies in an audio sequence of the program, a computational complexity of the uniform program indexing method is significantly decreased. With the aid of MFCC coefficients and a DFBE coefficient generated from the MFCC coefficients, audio patterns may be utilized for differentiating exciting events in the program from other unnecessary information. Scores corresponding to various audio segments are regarded as standards for picking up video segments in the program worthy of being chosen in a recorded highlight collection. Some low-level-feature parameters, some video segments having highlight-related visual characteristics, and a re-ranking procedure are utilized for enhancing precision of the scores for providing video segments worthy of being reviewed.
Owner:MAVS LAB
Method for manufacturing a semiconductor device where the scanning direction changes between regions during crystallization and process
ActiveUS7220627B2Uniform crystallinityImprove performanceSolid-state devicesSemiconductor/solid-state device manufacturingLight beamGalvanometer
The speed of the laser scanned by the scanning means such as a galvanometer mirror or a polygon mirror is not constant in the center portion and in the end portion of the scanning width. As a result, the object, for example an amorphous semiconductor film, is irradiated with the excessive energy and therefore there is a risk that the amorphous semiconductor film is peeled. In the present invention, in the case where the laser spot of the energy beam output continuously on the irradiated object is scanned by moving it back and forth with the use of the scanning means or the like, the beam is irradiated to the outside of the element-forming region when the scanning speed of the spot is not the predetermined value, for example when the speed is not constant, and accelerates, decelerates, or is zero, for example in the positions where the scanning direction changes, or where the scanning starts or ends.
Owner:SEMICON ENERGY LAB CO LTD
Preparation method of spherical nickel hydroxide anode material coated with gamma-hydroxy cobalt oxide
InactiveCN102142547AImprove liquidityFully dispersedAlkaline accumulator electrodesLithium hydroxidePhysical chemistry
The invention relates to a preparation method of a spherical nickel hydroxide anode material coated with gamma-hydroxy cobalt oxide, comprising the following steps: heating cobalt hydroxide coated spherical nickel hydroxide which is utilized as a precursor, and spraying an alkali metal hydroxide aqueous solution; evenly mixing the precursor with the alkali metal hydroxide aqueous solution; introducing oxygen to oxidize the cobalt hydroxide to convert the cobalt hydroxide into high-valency gamma-hydroxy cobalt oxide; and during oxidation, combining mechanical agitation and ultrasonic agitation to prevent the spherical nickel hydroxide anode material coated with gamma-hydroxy cobalt oxide from gathering and cause alkali metal ions to be embedded into a crystal lattice with the laminated structure of the gamma-hydroxy cobalt oxide. After oxidation reaction is over, a lithium hydroxide alkaline solution at certain temperature is added into an oxidation reaction pot to carry out heat preservation on the spherical nickel hydroxide anode material coated with gamma-hydroxy cobalt oxide; when heat preservation is carried out, mechanical agitation and ultrasonic agitation are adopted to cause the lithium ions to be embedded into the laminated structure of the gamma-hydroxy cobalt oxide; and the obtained spherical nickel hydroxide anode material coated with gamma-hydroxy cobalt oxide is screened by an ultrasonic sieve shaker after being washed and dried.
Owner:JIANGMEN CHANCSUN UMICORE IND
Preparation method for tin-based/graphene composite anode material of lithium ion battery
ActiveCN104716313ALower equivalent series resistanceReduce manufacturing costCell electrodesSodium-ion batteryGraphene
The invention discloses a preparation method for a tin-based / graphene composite anode material of a lithium ion battery, relates to a preparation method for a composite anode material of a battery, and solves problems that a tin-based / graphene composite anode material is unlikely to be subjected to batch preparation and a current collector cannot realize one-side electrodeposition in an existing lithium ion battery. The preparation method comprises the following steps: 1, preparing a plating solution; 2, assembling a cathode device; 3, preprocessing the cathode device; 4, performing composite electrodeposition; 5, performing drying and reduction. The preparation method is used for preparing the tin-based / graphene composite anode material of the lithium ion battery.
Owner:HARBIN INST OF TECH
Ice slurry concentrating, equalizing, storing and dispatching tank device
InactiveCN104792080AEfficient ice makingImprove continuityLighting and heating apparatusIce productionHigh concentrationIce storage
The invention discloses an ice slurry concentrating, equalizing, storing and dispatching tank device, and discloses a high-concentration ice slurry concentrating, storing and dispatching tank device. The device comprises at least one ice slurry making machine and an ice concentrating, storing and dispatching tank, wherein an ice lifter, a damping grille and an ice slurry water inlet pipe are arranged in the dispatching tank; an inlet of the ice slurry water inlet pipe is formed in the bottom of a tank body of the dispatching tank; an ice discharge submerged pump is arranged in the damping grille; the ice lifter comprises a gear motor; the upper end of the rotating shaft is connected with the gear motor; the lower end of a rotating shaft is connected with an ice discharge device; an ice discharge opening is formed in the position of the tank body of the ice concentrating, storing and dispatching tank; a top ice outlet of the ice slurry making machine is communicated with the inlet of the ice slurry water inlet pipe through an ice slurry delivery pipeline; and a water outlet in the bottom of the dispatching tank is communicated with a bottom water return opening of the ice making machine through a circulating pipeline with an ice-making circulation pump and a flow meter. According to the ice slurry concentrating, equalizing, storing and dispatching tank device, efficient ice making of the ice slurry making machine is kept, and continuous ice making and ice storage are realized.
Owner:王飞波
Gradient nano-coating used for thermal barrier coating anti-corrosion function and preparation method thereof
InactiveCN103058654AOvercoming differences in thermal expansion coefficientsThe method is simple and easyTotal thicknessThermal barrier coating
The invention discloses a gradient nano-coating used for a thermal barrier coating anti-corrosion function and a preparation method thereof. A substrate is steeped and lifted in pure sol and mixed sol of yttria stabilization zirconia (YSZ) and Al 2O3. A gradient coating structure with proportion of the YSZ and the Al2O3 changed from inside to outside is obtained in a prepared mode. The gradient nano-coating is composed of particles with the particle diameter of 10 to 100nm. The total thickness of the coating is 0.5 to 5 micrometers. According to the novel gradient coating structure, the facts that anti-corrosion property of the Al2O3 is kept and meanwhile a phenomenon of coating exfoliation due to difference of thermal expansion coefficients between the YSZ and the Al2O3 materials is overcome are hopeful to be achieved, the gradient nano-coating structure is prepared through a mixed sol steeping and lifting method, and then high temperature roasting is conducted. A composition weight ratio of the YSZ to the Al2O3 in the mixed sol changes between 9 to 1 and 1 to 9. The particles contained by the YSZ sol are in a monoclinic crystal shape. Temperature of the high temperature roasting is 500 to 800 DEG C. The preparation method is simple and convenient to achieve, and practical. The coating prepared is even in structure.
Owner:SHANGHAI UNIV
Preparation method of hydrocarbon hydrotreatment catalyst
The invention relates to a preparation method for a catalyst to hydrotreat hydrocarbons, which comprises gama- Al2O3 as carrier, metal from VIB group and VIII group as active constituents, and Ti as active adjuvant. The prepraration method comprises: adding titanate solution to bring said Ti during the gelatinization for preparing aluminum hydroxide; adding basic solution contained Mo or W into the dried aluminum hydroxide powder, mixing till the powder wet fully by solution; adding acid solution contained Co or Ni, mixing till plastic, extruding to form, drying, baking, and obtaining the catalyst. This invention improves the catalyst property obviously.
Owner:CHINA PETROLEUM & CHEM CORP +1
Adhesion apparatus and adhesion method
ActiveCN103317816APrevent overflowUniform adhesionLamination ancillary operationsLaminationUV curingLiquid-crystal display
The invention provides an adhesion apparatus and an adhesion method, wherein overflow due to adhesive flow can be prevented and a uniform adhesion thickness can be ensured with the apparatus. The adhesion apparatus adopts an ultraviolet-curable adhesive R to adhere a work-piece S1 and a work-piece S2, wherein the S1 and the S2 form a liquid crystal display. The apparatus comprises: a supply part (10) for providing the adhesive R so as to distribute the adhesive R all over the whole single surface of at least the one work-piece S1, an irradiation part (11) for irradiating UV on the whole adhesive R distributed all over the whole single surface of the work-piece S1 in atmosphere before adhesion so as to temporarily cure, and an adhesion part (2) for adhering the other work-piece S2 on the temporarily cured adhesive.
Owner:SHIBAURA MECHATRONICS CORP
Method for preparing chloramphenicol molecularly imprinted polymeric microspheres
The invention discloses a method for preparing chloramphenicol molecularly imprinted polymeric microspheres, and relates to a method for preparing polymeric microspheres. The method solves the problems that a molecularly imprinted polymer obtained by adopting a mass polymerization method has irregular particles and is easy to agglomerate. The method comprises the following steps of: 1, dissolving methacrylic acid and chloramphenicol into acetonitrile, adding ethylene glycol dimethacrylate and zaodiisobutyronitrile after the oscillation to obtain a mixture, performing ultrasonic treatment on the mixture, and then sealing the mixture after nitrogen aeration and oxygen removal; 2, performing heating polymerization on the sealed mixture for hours, cooling and centrifugating the mixture, and then naturally drying a precipitate; and 3, removing the chloramphenicol from the precipitate, washing the precipitate with methanol for 5h, and drying the precipitate to obtain the chloramphenicol molecularly imprinted polymeric microspheres. The chloramphenicol molecularly imprinted polymeric microspheres obtained by the method have regular particle shapes, uniform size, and no agglomeration phenomenon, and increase the specific surface area of the chloramphenicol molecularly imprinted polymeric microspheres, thereby improving the adsorptivity.
Owner:BEIJING PURKINJE GENERAL INSTR
Method for testing cutting performance of diamond saw blade, diamond grinding wheel and diamond drill bit
ActiveUS20180321119A1Solve inaccuracySolve non-uniformity problemInvestigating abrasion/wear resistanceInvestigating machinabilityMaterials scienceDrill bit
A method for testing cutting performance of a diamond saw blade, relating to a technical field of diamond tool test, is provided, which solves problems of inaccuracy and non-uniformity existing in conventional methods for testing cutting performance of a diamond tool. The method includes steps of: (1) obtaining a set load parameter value, particularly including steps of: controlling a feed amount of the diamond saw blade; finding out a load value K corresponding to a maximum feed amount of the diamond saw blade on a cutting object; and setting M=0.70K-0.85K, wherein M is the set load parameter value; and (2) during cutting, controlling a cutting load value of the diamond saw blade to be 0.90 M-1.1 M through a servo system. Therefore, uniform three cutting elements of machine and tool, object, and feed thrust are realized, and the performance of the diamond tool is automatically and accurately measured.
Owner:CHENGDU HUIFENG NEW MATERIAL TECH CO LTD
Manufacturing method of screen printed plate of edge sealing frame of liquid-crystal display
The invention discloses a manufacturing method of a screen printed plate of an edge sealing frame of a liquid-crystal display, comprising the following steps: designing the patterns of the whole screen printed plate as rectangular patterns which are matched with a glass substrate to be processed; arranging a rectangular layout area for multiple patterns of the edge sealing frame on the middle parts of the rectangular patterns in a row and column form; and respectively arranging U-shaped auxiliary lines of which the opening face outwards on the two ends of the patterns of the edge sealing frame in each row and each column, wherein the U-shaped auxiliary lines are located between the outer edge of the rectangular layout area and the outer edges of the patterns of the whole screen printed plate, the whole width of each U-shaped auxiliary line is the same as the widths of the patterns of the edge sealing frames in corresponding rows or corresponding columns, and the widths of the lines of the U-shaped auxiliary line is the same as the widths of the lines of the patterns of the edge sealing frame. According to the method, the U-shaped auxiliary lines are arranged at the four sides of the layout area, the U-shaped auxiliary lines are similar to the local shapes of the patterns of the edge sealing frame, and the density of the U-shaped auxiliary lines is the same, so that the influence of the thickness uniformity of the boxes caused by edge effect is maximally eliminated, the rainbow problem caused by the influence is solved, and the quality of the product is improved.
Owner:HEBEI JIYA ELECTRONICS
Auxiliary gas-phase cross-linking method of electron beams
ActiveCN106637915AUniform methodSimple process controlPhysical treatmentFibre typesFiberPolymer science
The invention provides an auxiliary gas-phase cross-linking method of electron beams. The method comprises the following steps: (1) loading a polymer fiber sample in an under-beam apparatus, vacuumizing, replacing high-purity nitrogen, and repeating twice; (2) respectively introducing active gas and high-purity nitrogen, wherein a ratio of the high-purity nitrogen flow to the active gas flow is (1 to 1) to (1 to 5); (3) rotating the polymer fibers in the under-beam apparatus at a rotation speed of 5 to 20 rad / min; and (4) starting an electron accelerator, wherein the beam density is 0.5 to 2 kGy / s, and stopping when the accumulative radiation amount is more than 8MGy. The cross-linking degree of the polymer fibers can be judged by testing a gel content of a radiation sample; and the ordinary gel content is greater than 90 percent, thus achieving the cross-linking target.
Owner:NAT UNIV OF DEFENSE TECH
Method for preparing high-nickel NCA ternary lithium battery material by continuous coating
InactiveCN108428885AHigh reversible specific capacityFirmly connectedCell electrodesLithium electrodeLithium battery
The invention relates to a method for preparing a high-nickel NCA ternary lithium battery material by continuous coating, and belongs to the technical field of lithium ion batteries. According to themethod, coating is performed by a double-stage screw extruder, and aluminum oxide continuously coated and dispersed high-nickel ternary precursor particles are obtained. Coating is uniform and is performed in the continuous high shear process, coating with controllable thickness is realized through measurement of aluminum isopropoxide and rotation speed of a screw, and the defect that the currentcoating process is difficult to control is overcome. The high-nickel NCA material is prepared in a continuous, stable and controllable manner. The method is continuously controllable, an aluminum oxide film with uniform surface distribution is firmly connected with an active material, and side reactions with an electrolyte are effectively suppressed, so that a battery prepared from the ternary material prepared with the method has high first reversible specific capacity and good cycle performance.
Owner:CHENDU NEW KELI CHEM SCI CO LTD
Method and device for preparing film by scanning and vapor deposition
ActiveCN101619441AImprove photoelectric conversion rateUniform methodVacuum evaporation coatingSputtering coatingPhotoelectric conversionMechanical engineering
The invention belongs to a method and a device for preparing a film by scanning and vapor deposition. A device which leads an electronic gun in a working state to swing or move is set in the method, and the electronic gun can spray in a moving state. In the device, the electronic gun is positioned on the swing device, and the electronic gun sprays in the moving state. The method leads the electronic gun to spray and evenly coat the film in the moving state, and the method is convenient and easy. The device can lead the electronic gun to spray under the moving state, can evenly coat the film, has high speed, low cost and good quality, can greatly increase the photoelectric conversion rate of a base plate and greatly prolong the service life.
Owner:JINGYUNTONG TECH CO LTD
Homogenized alumina ceramic and preparation method thereof
ActiveCN110698186AUniform temperature fieldEasy heat transferCeramic shaping apparatusOxide ceramicAlumina ceramic
The invention provides a homogenized alumina ceramic and a preparation method thereof. In the prior art, the homogenized alumina ceramic cannot be obtained by the existing preparation method. A purpose of the invention is to solve the technical problem in the prior art. The preparation method comprises: preparing a mixed slurry, wherein a silica sol, a water-soluble macromolecular organic matter and aluminum oxide ceramic powder are sequentially and uniformly mixed according to a certain mass ratio to obtain a mixed slurry; and preparing a homogenized alumina ceramic, wherein the obtained mixed slurry is injected into a mold, the mold is controlled to rapidly suspend in a liquid nitrogen environment to cure and mold the mixed slurry so as to obtain a billet, demolding the billet, and carrying out post-treatment to obtain the a homogenized alumina ceramic.
Owner:AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
Method for detecting thiamethoxam residues
PendingCN111060682ASolve the problem of trace measurementQuick checkBiological material analysisBiological testingAntigenPesticide residue
The invention provides a method for detecting thiamethoxam residues, and belongs to the technical field of pesticide residue detection. In the invention, an energy donor UCNPs is coupled with a thiamethoxam antibody, and an energy receptor AuNPs is used for marking a thiamethoxam antigen. A competitive immune reaction is performed between thiamethoxam and the antigen AuNPs combined with the antibody UCNPs, and a thiamethoxam residue content is calculate and acquired by using a fluorescence detection signal. The method for detecting the thiamethoxam residues has advantages of high sensitivity,good selectivity, high accuracy and high reliability, and is suitable for on-site, batch and rapid detection.
Owner:HEBEI ACADEMY OF AGRI & FORESTRY SCI INST OF GENETICS & PHYSIOLOGY
Dressing apparatus and dressing method of polishing pad of double-side polishing apparatus
InactiveCN106335004AUniform Dressing DeviceUniform methodSemiconductor/solid-state device manufacturingAbrasive surface conditioning devicesMechanical engineeringGrind
The invention discloses a dressing apparatus and a dressing method of polishing pad of a double-side polishing apparatus. The purpose is to provide a dressing apparatus capable of uniformly dressing a polishing pad. The apparatus includes first and second dressing grind stones 51 and 52 which grind polishing pads 17 and 18 by moving in a radial direction of upper and lower polishing plates 12 and 14 while abutting on corresponding polishing pads 17 and 18, in which the first and second dressing grind stones 51 and 52 are set so as to have: an inner side region portion P; an outer side region portion Q; and an intermediate region portion R, wherein the length of each of the inner side region portion P and the outer side region portion Q extending in a circumferential direction of the polishing plates 12 and 14 is longer than the length of the intermediate region portion R extending in a circumferential direction of the polishing plates.
Owner:FUJIKOSHI MACHINERY
Method for preparing chloramphenicol molecularly imprinted polymeric microspheres
The invention discloses a method for preparing chloramphenicol molecularly imprinted polymeric microspheres, and relates to a method for preparing polymeric microspheres. The method solves the problems that a molecularly imprinted polymer obtained by adopting a mass polymerization method has irregular particles and is easy to agglomerate. The method comprises the following steps of: 1, dissolvingmethacrylic acid and chloramphenicol into acetonitrile, adding ethylene glycol dimethacrylate and zaodiisobutyronitrile after the oscillation to obtain a mixture, performing ultrasonic treatment on the mixture, and then sealing the mixture after nitrogen aeration and oxygen removal; 2, performing heating polymerization on the sealed mixture for hours, cooling and centrifugating the mixture, and then naturally drying a precipitate; and 3, removing the chloramphenicol from the precipitate, washing the precipitate with methanol for 5h, and drying the precipitate to obtain the chloramphenicol molecularly imprinted polymeric microspheres. The chloramphenicol molecularly imprinted polymeric microspheres obtained by the method have regular particle shapes, uniform size, and no agglomeration phenomenon, and increase the specific surface area of the chloramphenicol molecularly imprinted polymeric microspheres, thereby improving the adsorptivity.
Owner:BEIJING PURKINJE GENERAL INSTR
Method for testing performance of diamond saw blade, diamond grinding wheel and diamond drill bit
ActiveUS10677700B2Accurate work performanceSolve inaccuracyInvestigating abrasion/wear resistanceInvestigating machinabilityTest performanceEngineering
Owner:CHENGDU HUIFENG NEW MATERIAL TECH CO LTD
Apparatus and method for uniformly mixing ice powder and sand or soil
The present invention provides an apparatus and a method for uniformly mixing ice powder and sand or soil. The apparatus comprises an adjustable-speed rotator, a stainless steel container, a filter screen, an atomizing nozzle, a vent hole, a protective cover, a constant flow pump, a water cup and a mass balance. The bottom of the stainless steel container body is connected with the adjustable-speed rotator through the card slot, and the filter screen is arranged in the upper groove of the stainless steel container body; the atomizing nozzle is arranged in the middle of the upper cover; the outer part of the atomizing nozzle is provided with a protective cover; and the atomizing nozzle is connected with the constant flow pump outlet, and the constant flow pump inlet is connected with a water cup on the mass balance through the pipeline. According to the apparatus provided by the present invention, micron-sized atomized water droplets are obtained through the atomizing nozzle; if liquidnitrogen is poured into the stainless steel container, the water droplets will fall into liquid nitrogen to become ice powder; and sand and soil within the desired particle size range can be obtainedby using the filter screen. According to the apparatus provided by the present invention, ice powder or atomized water droplets are prepared and sand or soil of a desired particle size is screened inthe rotating stainless steel container, and uniform mixing of ice powder or atomized water droplets with sand or soil is realized.
Owner:DALIAN UNIV OF TECH +1
LED lens designing method capable of achieving hexagon uniform illumination
InactiveCN105782905ASymmetrical hexagonal distributionLED Lens Design Method for Uniform IlluminationRefractorsOptical elementsIlluminancePlastic materials
The invention relates to an LED lens designing method capable of achieving hexagon uniform illumination. Two lenses are successively arranged to form a coaxial optical system, the light from a light source passes through the front focal lens to form parallel beam which is then used as the emergent light of the back fly eye lens and finally the hexagon illumination light spots are formed on the object surface. The material of the lenses is acrylic material which belongs to the plastic material, and because the structure of the fly eye lens is complicated, the plastic material can increase the production efficiency, the shape of the lens can be formed through injection molding and extrusion molding, the light transmittance is high (when the thickness is 3 mm, the transmittance rate is about 93%), and the cost is low. The construction method is simple, the illumination is uniform, and the centrosymmetric hexagon distribution of the light spots can be achieved.
Owner:UNIV OF SHANGHAI FOR SCI & TECH
Preparation method of hydrocarbon hydrotreatment catalyst
The invention relates to a preparation method for a catalyst to hydrotreat hydrocarbons, which comprises gama- Al2O3 as carrier, metal from VIB group and VIII group as active constituents, and Ti as active adjuvant. The prepraration method comprises: adding titanate solution to bring said Ti during the gelatinization for preparing aluminum hydroxide; adding basic solution contained Mo or W into the dried aluminum hydroxide powder, mixing till the powder wet fully by solution; adding acid solution contained Co or Ni, mixing till plastic, extruding to form, drying, baking, and obtaining the catalyst. This invention improves the catalyst property obviously.
Owner:CHINA PETROLEUM & CHEM CORP +1
Preparation method and application of three-dimensional polydopamine
ActiveCN112341623AUniform methodSimple methodEnergy modified materialsAntineoplastic agentsIron saltsAlcohol
The invention relates to a preparation method and application of three-dimensional polydopamine, and belongs to the technical field of functional materials. According to the preparation method, dopamine hydrochloride and metal iron salt are used as raw materials, and the three-dimensional polydopamine is prepared by utilizing a self-polymerization and self-assembly. The three-dimensional polydopamine prepared by the method has the advantages of simple method, adjustable size and morphology and the like, and the requirement of environmental protection is met by taking a common water / alcohol system as a reaction solvent. The preparation method of the three-dimensional polydopamine material provided by the invention can promote further development of related research of polydopamine. The three-dimensional polydopamine prepared by the method disclosed by the invention has an excellent photo-thermal conversion effect, and compared with traditional optical materials, the material shows excellent biocompatibility and photo-thermal conversion rate, and plays a role in promoting the research of a photo-thermal agent. The three-dimensional polydopamine material prepared by the method can beused for photothermal therapy of tumors, so that the three-dimensional polydopamine material has a good medical application prospect.
Owner:TSINGHUA UNIV
Method for preparing Au nanoflower through microwave auxiliary method and Au nanoflower
ActiveCN108500293ASimple methodFast wayMaterial nanotechnologyTransportation and packagingDispersityRound-bottom flask
The invention relates to the technical field of nanometer material preparation, in particular to a method for preparing an Au nanoflower through a microwave auxiliary method and the Au nanoflower. Themethod comprises the following steps that 1, a HAuCl4 solution of a certain concentration is added into a round-bottom flask, and then octadecylamine, KBr and PVP are added to form a mixed solution a; 2, tetraethylene glycol (TEG) as a reducing agent is added into the mixed solution a to be mixed and stirred to form a mixed solution b; 3, the mixed solution b is put into a microwave reactor to besubjected to a heating reaction; and 4, the product obtained in the step 3 is processed by acetone to obtain the Au nanoflower. The microwave auxiliary method is adopted, the method is novel, and theAu nanoflower which is single in morphology, good in dispersity and uniform in size is prepared.
Owner:ZHEJIANG SCI-TECH UNIV
A kind of preparation method of wafer level vanadium dioxide thin film
ActiveCN110318021BImprove performanceUniform methodVacuum evaporation coatingSputtering coatingVanadium dioxidePhysical chemistry
The invention provides a preparation method of a wafer-level vanadium dioxide film. The preparation method comprises the following steps of S1, providing a metal vanadium film with uniform growth; andS2, under the condition that the temperature is 450-650 DEG C and oxygen-free, oxidizing the metal vanadium film by using water vapor to obtain a monoclinic phase vanadium dioxide film. The preparation method can be used for preparing the vanadium dioxide thin film with the excellent performance of the wafer level size, is uniform and compact, and can achieve the resistance change of three to four orders of magnitudes in the phase change process. According to the preparation method, the water vapor is used as a mild oxidizing agent, a self-adjusting oxidation mechanism can be realized in thegrowth process when the vanadium dioxide film is prepared, so that a stable positive tetravalent monoclinic phase vanadium dioxide film can be prepared. According to the preparation method, the growthtemperature zone prepared by the vanadium dioxide film is greatly expanded, and the vanadium dioxide film can be efficiently prepared within the range of 450-650 DEG C; and the method is simple and easy to implement and high in repeatability, and the whole film growth process is non-toxic, environment-friendly and low in cost.
Owner:UNIV OF SCI & TECH OF CHINA
Homogenized alumina ceramic and preparation method thereof
ActiveCN110698186BImprove uniformityGuaranteed mechanical propertiesCeramic shaping apparatusSlurryMold removal
Owner:AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
A method for manufacturing a screen printing plate of a liquid crystal display sealing frame
Owner:HEBEI JIYA ELECTRONICS
A method for preparing au nanoflowers by a microwave-assisted method and au nanoflowers
ActiveCN108500293BSimple methodFast wayMaterial nanotechnologyTransportation and packagingChemical physicsRound-bottom flask
The present invention relates to the technical field of nanomaterial preparation, in particular to a microwave-assisted method for preparing Au nanoflowers and Au nanoflowers, comprising the following steps: step 1, adding a certain concentration of HAuCl into a round bottom flask 4 solution, followed by adding octadecylamine, KBr and PVP to form a mixed solution a; step 2, adding the reducing agent tetraethylene glycol (TEG) to the mixed solution a, mixing and stirring to obtain a mixed solution b; step 3, mixing the mixed solution b placed in a microwave reactor to heat the reaction; Step 4, the product of Step 3 is treated with acetone to obtain Au nanoflowers. The invention adopts a microwave-assisted method, the method is novel, and Au nanoflowers with single appearance, good dispersion and uniform size are prepared.
Owner:ZHEJIANG SCI-TECH UNIV
Preparation method and application of Bi2Ti4O11:Yb, Er up-conversion luminescence anti-counterfeiting film
InactiveCN112962213AGood up-conversion luminescence performanceGreat application potentialStampsMonocomponent synthetic polymer artificial filamentUpconversion luminescenceThin membrane
The invention discloses a preparation method and application of a Bi2Ti4O11:Yb, Er up-conversion luminescence anti-counterfeiting film. HAC, DMF and TBOT solutions are uniformly mixed, bismuth nitrate, ytterbium nitrate and erbium nitrate are sequentially added, after the bismuth nitrate, the ytterbium nitrate and the erbium nitrate are fully dissolved, a mixture is evaporated to dryness to obtain gray black powder, the powder is annealed, TPU, THF and DMF are dissolved to obtain a uniform transparent solution with viscosity, and Bi2Ti4O11:Yb, Er powder is added under a stirring condition and is fully dissolved to obtain an electrostatic spinning precursor solution. The precursor solution is transferred into an electrostatic field, an electrostatic spinning process is performed, and a spinning product is obtained on a collecting plate. The collecting plate is put into a drying oven to be dried. Finally, the film is white and transparent under a fluorescent lamp, and no light emitting phenomenon exists. However, under the excitation of a 980 nm laser, the film shows excellent up-conversion luminescence performance. By adjusting the doping proportion of the ytterbium nitrate and the erbium nitrate, the anti-counterfeiting film with red, yellow and green up-conversion luminescence properties can be obtained.
Owner:SHAANXI UNIV OF SCI & TECH
Picc venous catheter intelligent control operation instrument for chemotherapy of leukemia patients
ActiveCN107297016BIncrease intensityReduce workloadGuide needlesSurgical navigation systemsPulse pressureLeukemia
The invention discloses a PICC (peripherally inserted central catheter) intelligent control operation instrument for chemotherapy on leukemia patients, and belongs to the technical field of medical apparatus and instruments. The PICC intelligent control operation instrument comprises a movable operation device, an automatic puncture device, a positioning and navigation device, a main control monitoring device and an auxiliary fixing device. The movable operation device comprises a base desk, a first mechanical arm, a second mechanical arm and a third mechanical arm, the automatic puncture device comprises a first electric telescopic rod, an angle controller, a puncture support plate, a cannula sheath clamp head, a needle clamp head and a catheter clamp head, the positioning and navigation device comprises a connector, a positioning and navigation mechanism, a second electric telescopic rod and an ultrasonic probe, the main control monitoring device comprises a hose, a display screen, a control desk, an ultrasonic generator, an electrocardiogram instrument and an EKG (electrocardiogram) positioning assembly, and the auxiliary fixing device comprises an automatic pulse pressure device, a base plate and a grip strength fixing mechanism. The PICC intelligent control operation instrument has the advantages of simplicity and convenience in use, speediness and high accuracy.
Owner:张建英
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