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Volatile matrices for matrix-assisted laser desorption/ionization mass spectrometry
InactiveUS6104028AEasy to spreadReduce formationSamples introduction/extractionWithdrawing sample devicesThermal ionization mass spectrometryRoom temperature
A sample preparation method is disclosed for volatilization and mass spectrometric analysis of nonvolatile high molecular weight molecules. Photoabsorbing molecules having significant sublimation rates at room temperature under vacuum, and preferably containing hydroxy functionalities, are disclosed for use as matrices in matrix-assisted laser desorption / ionization mass spectrometry. The samples are typically cooled in the mass spectrometer to temperatures significantly below room temperature.
Owner:AGENA BIOSCI
Heat insulating layer based on la2zr2o7 for high temperatures
InactiveUS20040101699A1Improve the overall coefficientLow thermal conductivityMolten spray coatingEfficient propulsion technologiesThermal coefficientLanthanum
The invention relates to a heat insulating layer on a metallic substrate for using for high temperatures, especially for temperatures above 1300° C. Starting with a base of La2Zr2O7, the properties of the heat insulating substance to be used as the heat insulating layer are regularly improved, by substituting lanthanum cations with ions of elements Nd, Eu, Dy, Sm and / or Gd. An additional, at least partial substitution of the zirconium cations by Ce, Hf or Ta is advantageous. Improving the properties results especially in a high thermal coefficient of dilation alpha and low heat conductivity lambda.
Owner:FORSCHUNGSZENTRUM JULICH GMBH
Method for vacuum scattering intermetallic compound for coupling TiAL
InactiveCN101176946AImprove diffusion abilityGood removal effectNon-electric welding apparatusBeta phaseThermal deformation
The invention relates to a TiAl-intermetallic-compound vacuum diffusing connection method, belonging to the TiAl-intermetallic-compound welding field, which overcomes the technical drawbacks of high temperature of diffusing connection and high pressure of diffusing connection in the prior TiAl-intermetallic-compound diffusing connection technology. The invention adopts hydrogenated titanium or titanium alloy chaff as the interface layer of diffusing connection. Ti3Al+TiAl dual phase (Alpha2+Gamma) organ can be formed under the temperature of diffusing connection titanium, which facilitates the formation of high-intensity connector lug of TiAl-intermetallic-compound diffusing connection. And hydrogen makes the flow stress of thermal deformation of titanium or titanium alloy decrease and the thermal plasticity increase, so that hydrogenated titanium or titanium alloy is prone to deform under high temperature. Meanwhile,, the self-diffusing capacity of hydrogen in titanium or titanium alloy and the diffusing capacity of solute are enhanced, more particularly, in Beta phase the capacities are more enhanced, so that hydrogen can accelerate the diffusing of the alloy elements, reduce the atomic combination energy and the diffusing activation energy, promote the diffusing coordinated deformation capacity, and the reliable diffusing connection of connector lug of TiAl-intermetallic-compound can be realized under comparatively low temperature.
Owner:HARBIN INST OF TECH
Breathable chembio protection fabric with carbon nanotube physical pathogen barrier
InactiveUS20110123757A1Avoid undue heat stressPrevent penetrationMaterial nanotechnologyLamination ancillary operationsFiberCarbon nanotube
A fabric for use in chemical and biological (CB) protective garments includes at least one felt layer having from 25% to 100% carbon nanotube (CNT) fibers as a breathable physical barrier against toxic chemical droplets and / or pathogens. The felt layers are cleaned and consolidated into a mechanically competent sheet which can form adhesive seams having lapshear greater than the sheet itself. An additional supporting layer can be included. The supporting layer can be a wicking layer which is permeable with a chlorinated or otherwise chemically active solution to establish a reactive chemical barrier, the solution being dispensed on demand from a portable container. Embodiments include a second layer of CNT or of another backing fabric, sandwiching the wicking layer therebetween. Impermeable fluoropolymer seams can divide the fabric into a plurality of CNT / wicking cells. A layer of activated charcoal and / or halamine-forming hydantoin can be included for persistent reactive chemical protection.
Owner:WARWICK MILLS INC
Positive electrode material for lithium ion cell, its preparing method and lithium ion cell
ActiveCN1652376AOvercoming the difficulty of fine particle coatingImprove high temperature cycle stabilityElectrode manufacturing processesCell seperators/membranes/diaphragms/spacersLithiumConductive polymer
The disclosed electrode piece of LiMn2O4 is modified by polymer, which contains functional group of possessing complexation capability with Mn ion. The electrode piece solves issue of difficulties for cladding oxide and thin grains in LiMn2O4 material modified by conductive polymer as well as issue of easy dropping-out clad caused by regrinding. Since effects of complexation and valence bond between polar group of polymer and Mn ions at surfaces of LiMn2O4 grains, oxygenolysis ability of Mn4+ ions for electrolyte and disproportionation degree happened in Mn3+ ions are reduced so as to prevent digestion and migration of lithium ions and increase cyclical stability in high temperature of lithium cell by using LiMn2O4 as positive pole. Features of preparing technique are: simple, feasible and value of industrialization.
Owner:SICHUAN INDIGO TECH CO LTD
Iamine-polyanion lithium salt and preparation method thereof as well as application of iamine-polyanion lithium salt as nonaqueous electrolyte
The invention discloses an iamine-polyanion lithium salt and a preparation method thereof as well as application of the iamine-polyanion lithium salt as nonaqueous electrolyte. The invention provides the iamine-polyanion lithium salt containing 'S-fluoroalkylsulfonyamino'. The iamine-polyanion lithium salt has excellent dissolving capacity in nonaqueous solvents such as carbonate esters, ethers and ionic liquid; the nonaqueous electrolyte of the iamine-polyanion lithium salt has the advantages of high-temperature conductivity, high lithium ion transference number, no corrosion to an aluminum foil at high potential, good compatibility between the nonaqueous electrolyte and a metal lithium electrode and other widely-used electrode materials, and the like, and can be used for a lithium ion battery or a secondary lithium battery.
Owner:HUAZHONG UNIV OF SCI & TECH
Submicron-order boron carbide powder and preparation method and application thereof
InactiveCN106082230AEnhanced Diffusion MotilityHigh purityArmourOther chemical processesSynthesis methodsBoron carbide
The invention discloses submicron-order boron carbide powder and a synthesis method and application thereof. Production efficiency is improved, the production cost is reduced, and high purity and fine granularity are achieved. The purity of boron carbide ranges from 98.5% to 99.4%, the mean grain diameter ranges from 0.4 micrometer to 5 micrometers, and boron carbide accounts for 90% or above. The method for preparing the submicron-order boron carbide powder includes the steps that raw materials are prepared and preliminarily mixed; a grinding medium is added, and the materials are mixed to be uniform; the raw materials and the grinding medium are separated; green bodies are formed after pressing; the green bodies enter a reaction device for a self-spread synthesis reaction; reaction products are crushed; grinding and separating are carried out; acid pickling and purifying are carried out; the materials are filtered, washed and dried; airflow crushing is carried out. The boron carbide powder synthesized through the method can be applied to a nuclear reactor and used for a neutron absorption material and a radiation protection material; the submicron-order boron carbide powder can be prepared into an armor material after high-temperature and high-pressure sintering and can be used as a grinding material and an abrasive for fine advanced grinding.
Owner:BEIJING GUANGKEBOYE SCI & TECH
Ultrahigh-temperature high-entropy boride ceramic powder and preparation method thereof
The invention relates to ultrahigh-temperature high-entropy boride ceramic powder and a preparation method thereof, and belongs to the technical field of ceramic materials. The ceramic powder disclosed by the invention is of a single-phase hexagonal crystal structure; the chemical formula is abbreviated as TMExB2, TME is at least four of Ha, Zr, Nb, Ti, Ta, Mo, W and Cr, and the product of the number of elements in TME times x is 1; the ceramic powder can keep a stable single-phase structure mainly by regulating and controlling the components of the ceramic powder, the problems of complex interfaces and stress caused by multiple components are solved, and the ceramic powder has excellent mechanical properties. Furthermore, the high-entropy boride ceramic powder is synthesized by an induction plasma spheroidizing sintering process for the first time; the method is simple in process and short in period, the high-entropy boride ceramic powder with certain particle size distribution, compact surface, high degree of sphericity, good fluidity, no element segregation phenomenon and good chemical structure stability can be obtained by regulating and controlling process parameters, and themethod has a good application prospect.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Preparation method and application method of electrocatalysis electrode
ActiveCN105776431ALarge specific surface areaExtended service lifeWater/sewage treatment with mechanical oscillationsWater/sewage treatment by electrochemical methodsHeat depositionTitanium
The invention provides a preparation method and an application method of an electrocatalysis electrode. The preparation method includes: taking titanium as a substrate, depositing Bi-SnO2-Sb2O3-CNT on the titanium substrate by means of heat deposition, and then depositing a PbO2 active surface layer on a Bi-SnO2-Sb2O3-CNT interlayer by the aid of electrodeposition to prepare a Ti / Bi-SnO2-Sb2O3-CNT / PbO2 electrocatalysis electrode. The electrocatalysis electrode is used for ultrasound electrocatalysis algae killing and microcystin degradation. The electrocatalysis electrode is taken as an anode, a stainless steel or copper sheet is taken as a cathode, microcystis aeruginosa solution added with electrolyte is subjected to electrolysis, and ultrasonic treatment is applied in the electrolytic process. The preparation method and the application method of the electrocatalysis electrode have the advantages that the electrode has more catalytic activity sites, and catalytic activity of the electrode is improved; electrical conductivity of the electrode can be improved, and energy consumption can be lowered; electrocatalytic activity is high, and service life is long; ultrasonic oxidation and electrocatalytic oxidation are combined, synergistic effect is generated, and efficiency of algae killing and microcystin degradation is highly increased.
Owner:HARBIN ENG UNIV
Amphiphilic block T-shaped copolymer and preparation method thereof
ActiveCN103570887AHigh apparent viscosityNot easy to hydrolyzeDrilling compositionAcryditePolymer science
The invention provides an amphiphilic block T-shaped copolymer and a preparation method thereof, belonging to the field of petroleum exploitation technology. The amphiphilic block T-shaped copolymer comprises at least one block (A) taking acrylamide as a monomeric unit, at least one block (B)at least one block (A) taking alkylphenol polyoxyethylene ether as a monomeric unit, and at least one block (C) taking 2-acrylamide-2-methylpropanesulfonic acid as a monomeric unit. When being adopted as an oil displacement agent, the amphiphilic block T-shaped copolymer is less influenced by outside metal ions, and has excellent salt resistance, a T-shaped structure can form a reversible supermolecule aggregation network structure with intermolecule association, so that the temperature resistance and salt resistance properties of the polymer can be effectively enhanced.
Owner:CHINA PETROLEUM & CHEM CORP +1
Semiconductor device and manufacturing method thereof
InactiveUS20070145600A1High yieldImprove reliabilitySemiconductor/solid-state device detailsSolid-state devicesDielectricCopper
A semiconductor device includes an embedded wire in a first wire trench formed in a first interlayer dielectric film, the embedded wire having a barrier metal, a first seed film, a second seed film, and a copper film. The first seed film is formed by a copper film containing metal, and the second film is formed by a copper film. The second seed film suppresses that the metal contained in the first seed film diffuses into a wiring material film in a manufacturing process.
Owner:PANASONIC CORP +1
Cu-Ni-Co-Fe-Si-Zr-Zn copper alloy material and preparation method thereof
ActiveCN110951990AEasy to spreadPromote precipitationMetal rolling arrangementsSolution treatmentUltimate tensile strength
The invention discloses a Cu-Ni-Co-Fe-Si-Zr-Zn copper alloy material and a preparation method thereof. The copper alloy material is prepared from, by weight, 2.0%-3.0% of Ni, 0.3%-0.8% of Co, 0.3%-0.8% of Fe, 0.5%-1.1% of Si, 0.1%-0.2% of Zr, 0.1% 0.3% of Zn and the balance Cu. The preparation method of the copper alloy material comprises the following steps of alloy casting, homogenization treatment, hot rolling, solid solution treatment, deep cold rolling and pulse magnetic field aging treatment. The copper alloy material has the advantages of high yield strength, high tensile strength and conductivity, high elongation at break, and good comprehensive mechanical property and conductive performance. In addition, no toxic element is contained in the composition of the copper alloy material, the sources of raw materials are rich, the preparation process does not generate toxic compounds, and the harm to human bodies and the environment is small.
Owner:FUZHOU UNIV +2
Dry powder inhalation medicine composition and preparation method thereof
InactiveCN105982880AAvoid stimulationImproving In Vitro Assay ParametersPowder deliveryPharmaceutical non-active ingredientsIndacaterolAdditive ingredient
The invention provides a dry powder inhalation medicine composition and a preparation method thereof. The composition is prepared from a coating agent with a specific particle size characteristic, lactose monohydrate with a specific particle size characteristic for a carrier and a micronized medicinal active ingredient, wherein the coating agent is an inhaling magnesium stearate or a mixture of the inhaling magnesium stearate and micronized lactose monohydrate; and the medicinal active ingredient is selected from at least one of glycopyrronium bromide, umeclidinium, indacaterol, formoterol, vilanterol, fluticasone and pharmaceutically available salt of the active ingredients. The preparation method comprises the following steps of sufficiently mixing and coating the coating agent and the lactose monohydrate, and uniformly mixing with the micronized medicinal active ingredients.
Owner:SICHUAN HAISCO PHARMA CO LTD
Preparation method of novel transition metal-nitrogen co-doped carbon material oxygen reduction/oxygen evolution difunctional catalyst
ActiveCN110280288ALow costImprove catalytic performancePhysical/chemical process catalystsCell electrodesMetal particleZinc–air battery
The invention discloses a preparation method of a novel transition metal-nitrogen co-doped carbon material oxygen reduction / oxygen evolution difunctional catalyst. Transition metal in the catalyst comprises silver, cobalt and iron, and the molar ratio of the silver to the cobalt to the iron in the catalyst is 1 to (8-12) to (5-9). The transition metal-nitrogen co-doped carbon material oxygen reduction / oxygen evolution difunctional catalyst is prepared by using a low-cost complexing agent and a metal ion complexing method, and has the characteristics of low cost, simple operation and easy synthesis; additional metal reducing agent or separate addition of a nitrogen dopant is not needed, so that doping elements can be uniformly distributed; the content of a doppant on the surface of the catalyst is high, and the problem of agglomeration of metal particles and the like can be effectively avoided, thereby improving the catalytic performance. Relatively high ORR (Oxidation-reduction reaction) and OER (Oxygen evolution reaction) catalytic activity and stability in an alkaline solution are exhibited; meanwhile, relatively good resistance to methanol is realized; the catalyst has relatively good catalytic performance when applied to zinc-air batteries.
Owner:山西师范大学
Method for synthesizing cobalt oxide and ferrocobalt layered bimetal hydroxide compound
InactiveCN107086312AImprove conductivityExcellent water oxidation performanceCell electrodesElectrolysisFerrocobalt
The invention belongs to a method for synthesizing a nanometer material from top to bottom by a physical mode, and discloses a method for synthesizing a cobalt oxide and ferrocobalt layered bimetal hydroxide compound. The method comprises the steps of taking a block-shaped ferrocobalt alloy target as a raw material, and polishing and cleaning to remove an oxide layer on a surface; placing the block-shaped ferrocobalt alloy target in a container, and adding a sodium chloride solution to a position above the alloy target by 3-4 centimeters; performing ablation on the alloy target for 20-30 minutes by employing a nanosecond pulse laser liquid phase with a wavelength being 1,064 nanometers; and finally, taking out a brown solution in the container, performing freezing and drying to obtain a powder compound product after centrifugation. The ferrocobalt alloy target in the sodium chloride solution is ablated by a nanosecond laser liquid phase ablation technology to obtain the cobalt oxide and ferrocobalt layered bimetal hydroxide compound, the defect of poor conductivity of the material is effectively overcome by a synergistic effect of the cobalt oxide and ferrocobalt layered bimetal hydroxide, and meanwhile, the catalytic activity of water electrolysis to generate oxygen is also greatly improved; and the method is simple in process, ingenious in design and low in cost, and is safe and controllable.
Owner:TIANJIN UNIV
Method for synthesizing composite of nickel and ferronickel layered double metal hydroxides through laser
InactiveCN106807949AImprove conductivityExcellent water oxidation performanceNanotechnologyMetal/metal-oxides/metal-hydroxide catalystsFreeze-dryingOxide composite
The invention belongs to a method for synthesizing a nano material from top to bottom in a physical mode, and discloses a method for synthesizing composite of nickel and ferronickel layered double metal hydroxides through laser. The method comprises the following steps of: taking a blocky ferronickel alloy target as a raw material, and grinding and washing the alloy target to remove a surface oxidization layer; putting the blocky ferronickel alloy target into a container, and adding an urea solution into the container until 1-1.5 cm highly above the alloy target; ablating the alloy target for 20-30 minutes through nanosecond-pulse laser liquid phase with wavelength of 1064 nanometers; and finally, taking out a dark brown solution in the container, and performing freeze-drying after centrifuging to obtain a powder composite product. The method is used for ablating the ferronickel alloy target in the urea solution through a nanosecond-pulse laser liquid phase ablating technology to obtain composite of nickel and ferronickel layered double metal hydroxides; the defects of material conductivity are effectively overcome through the synergistic effect of nickel and ferronickel layered double metal hydroxides, and catalytic activity is further greatly improved; and the method is simple in process, is delicate in design, is safe and controllable, and is low in cost.
Owner:TIANJIN UNIV
Low-pressure synthesized ammonia catalyst and preparation method thereof
ActiveCN105289624AStrong catalytic effectBroad application prospectsMetal/metal-oxides/metal-hydroxide catalystsChemical compositionHigh activity
The invention discloses a low-pressure synthesized ammonia catalyst. The atomic percentage of chemical ingredients of the low-pressure synthesized ammonia catalyst is as follows: 10 to 22 percent of neodymium, 50 to 85 percent of iron, 1 to 18 percent of cobalt, 0.3 to 1 percent of gallium, 0.01 to 0.2 percent of zirconium and 1 to 11 percent of boron. The catalyst has high catalytic effect under 100 to 300 DEG C and 0.1MPa to 10MPa, and especially under the reaction condition of 100MPa, 10000h<-1> and 100 DEG C, the concentration of ammonia at an outlet reaches 29.2 percent. Compared with the existing industrial ammonia synthetic iron catalyst, the low-pressure synthesized ammonia catalyst has the characteristics of low temperature, low pressure and high activity and is wide in application prospect.
Owner:赵康军
Platinum-based intermetallic nanocrystal with ordered structure and preparation and application thereof
ActiveCN113206259ARaise the chemical potentialEasy to driveCell electrodesPlatinum saltsPtru catalyst
Owner:HUAZHONG UNIV OF SCI & TECH
Epitaxial growth method for improving P-type doping concentration of nitride light emitting diode
ActiveCN105720139AImprove crystal qualityReduce self-compensating effectsMaterial nanotechnologySemiconductor/solid-state device manufacturingP type dopingElectron blocking layer
An epitaxial growth method for improving P-type doping concentration of a nitride light emitting diode relates to the technical field of nitride epitaxy. A buffer layer, an N-type layer, a light emitting active layer, an electron blocking layer, a P-type layer and a contact layer are sequentially grown on a substrate, the epitaxial growth method is characterized in that the P-type layer is formed through layered growth by controlling the flow of trimethyl indium under the atmosphere of N2 and ammonia gas, the hole concentration of a P-Al<X>Ga<1-X>N material layer can be obviously improved, the square resistance can be obviously reduced, and the light emitting diode (LED) photoelectric property based on the material layer can be obviously improved.
Owner:XIAMEN CHANGELIGHT CO LTD
Layered hybrid organic-inorganic perovskite materials
ActiveUS20200152395A1Use in some applicationHigh charge transport performanceLight-sensitive devicesSolid-state devicesOrageneAmmonium Cation
In a first aspect, the present invention relates to a perovskite material comprising negatively charged layers alternated with and neutralized by positively charged layers; the negatively charged layers having a general formula selected from the list consisting of: Ln−1MnX3n+1, LnMnX3n+2, and Ln−1M′nX3n+3, and the positively charged layers comprising: one or more organic ammonium cations independently selected from monovalent cations Q and divalent cations Q′, or a polyvalent cationic conjugated organic polymer Z, wherein Q, Q′ and Z comprise each a π-conjugated system in which at least 8 and preferably at least 10 atoms participate, L is a monovalent cation, Mn are n independently selected metal cations averaging a valence of two, M′n are n independently selected metal cations averaging a valence equal to 2+2 / n, X is a monovalent anion, and n is larger than 1.
Owner:INTERUNIVERSITAIR MICRO ELECTRONICS CENT (IMEC VZW) +1
Preparation method of quick-drying high-bonding-strength ceramic tile adhesive
InactiveCN111117521AGood dispersionImprove dispersion stabilityNon-macromolecular adhesive additivesMacromolecular adhesive additivesAdhesiveMicrosphere
The invention discloses a preparation method of a quick-drying high-bonding-strength ceramic tile adhesive, and belongs to the field of building materials. A mixed glue solution is prepared by blending carboxymethyl chitosan, guar gum and the like, a pretreated glue solution containing microsphere components is formed under the cross-linking effect of auxiliary materials, and a concentrated material containing titanium dioxide prepared subsequently is combined to provide a catalytic drying effect, improve the dispersion stability of a ceramic tile glue, provide good bonding strength, added sugar calcium facilitates internal polymerization, and calcium ions can be combined with sodium alginate to mask part of hydrophilic groups to form a relatively stable egg box structure to provide the function of separating water, so that the time required for solidification is shortened, and the bonding strength is maintained for a long time. According to the invention, metakaolin is modified by trimethylchlorosilane to construct a hydrophobic film, so that part of methyl groups can replace hydroxyl groups, the number of hydrophilic silicon hydroxyl groups is reduced, and the compatibility withrubber materials is improved. The method solves the problems of long solidification time and low bonding strength of the common ceramic tile adhesive at present.
Owner:杨建
Copolymer ligand rhodium-lithium bimetal catalyst and its manufacturing method and application
InactiveCN1517151AHigh activityImprove stabilityOrganic-compounds/hydrides/coordination-complexes catalystsCarboxylic preparation from carbon monoxide reaction2-VinylpyridineLithium hydroxide
A bimetal Rh-Li catalyst for the hydroxylation reaction of methanol to obtain acetic acid or the carbonylating reaction of methyl acetate to obtain ethylanhydride is disclosed, which has 3 basic structures and features high activity, selectivity and stability. Its preparing process includes such steps as copolymerization of 2-vinylpyridine or 4-vinylpyridine on acrylic acid, acrylate, or maleic acid anhydride, hydrolzying by strong alkali, acting on lithium hydroxide to obtain ligand, reacting on Rh compound and coordination.
Owner:INST OF CHEM CHINESE ACAD OF SCI
Platinum phosphide nano-catalyst, preparation method thereof and application of platinum phosphide nano-catalyst in electrocatalytic oxygen reduction
InactiveCN110627030AReduced activityImprove structural stabilityMaterial nanotechnologyPhysical/chemical process catalystsNano catalystElectronic structure
The invention provides a platinum phosphide nano-catalyst and a preparation method thereof, and application of the platinum phosphide nano-catalyst in electrocatalytic oxygen reduction. The preparation method comprises the following steps: 1) dispersing a platinum catalyst in a solvent, and carrying out uniform mixing under stirring to obtain a platinum catalyst dispersion liquid; and 2) adding aphosphorus source into the platinum catalyst dispersion liquid, carrying out uniform mixing under stirring, carrying out a reaction at a certain temperature, and performing centrifuging and washing after the reaction is finished so as to obtain the platinum phosphide nano-catalyst. According to the method, phosphorus atoms generated by decomposition of the phosphorus source are diffused into the platinum catalyst at a certain temperature, so the platinum phosphide nano-catalyst with a specific electronic structure is synthesized. The preparation method has the advantages of simple process, lowcost, good repeatability, no environmental pollution and convenience in large-batch preparation; and the prepared platinum phosphide nano-catalyst shows far higher catalytic activity and stability inan electrocatalytic oxygen reduction reaction compared with commercial platinum / carbon catalysts, and has good application prospects.
Owner:XI AN JIAOTONG UNIV
Method for improving p-type ohmic contact performance of GaN-based light-emitting device
InactiveCN104201255ALower contact barrier heightImproved contact characteristicsSemiconductor devicesBinding energyOhmic contact
The invention discloses a method for improving the p-type ohmic contact performance of a GaN-based light-emitting device. The method comprises the following steps of: carrying out activation treatment on the p-type GaN of a GaN-based light-emitting epitaxial wafer taking sapphire as a substrate; producing an indium tin oxide ITO layer with a thickness of 100-300nm at one side of the p-type GaN; carrying out annealing treatment on a sample in a nitrogen environment, an annealing temperature being kept at 450-550 DEG C, and an annealing time being 1-15 minutes; corroding by acid solution to remove indium tin oxide ITO; carrying out a p-type GaN ohmic contact process for the traditional structure on the surface of the sample after the indium tin oxide ITO is removed, so as to complete production for a p-type contact electrode. With the adoption of the method disclosed by the invention, the binding energy of Ga2p on the surface of the p-type GaN can be reduced after ITO annealing, thus reducing the Schottky contact barrier height, therefore, obtaining for a more excellent ohmic contact characteristic is facilitated.
Owner:SOUTH CHINA UNIV OF TECH
Heat-resistant Anti-static adhesive film
InactiveUS20120315475A1Simplify operating proceduresIncrease temperatureFilm/foil adhesivesThin material handlingCross-linkPolymer science
The invention provides a heat-resistant anti-static adhesive film having at least includes a top film, a silane-treated release layer on an underlying substrate layer, and a pressure-sensitive adhesive layer coated over the release layer. The pressure-sensitive adhesive layer is obtained by adding a plasticizer, an ionic compound or an anti-static agent, a cross-linking agent and aliphatic or alicyclic multi-functional isocyanate into (meth)acrylate polymer of the reactive silane compound. The composition has a long working life (pot life) of up to 24 hours and anti-static capability. A pressure-sensitive patch or surface protective film containing the abovementioned composition in the form of sheets or strips is capable of standing high temperature of 150 for up to 3 hours without leaving glue residue.
Owner:NANYA PLASTICS CORP
Preparation technology of carbon-yttrium modified titanium dioxide photocatalyst
InactiveCN106732506AImprove photocatalytic performanceLarge specific surface areaWater/sewage treatment by irradiationWater treatment compoundsYttriumMaterials science
The invention relates to a preparation technology of a carbon-yttrium modified titanium dioxide photocatalyst, belonging to the technical field of modified titanium dioxide photocatalysts. The preparation technology comprises the steps of preparing precursor sol by taking tetrabutyl titanate as a raw material and adopting a sol-gel method; then, doping the precursor sol with modifying elements, and stirring to obtain gel; drying, crushing and calcining the gel to obtain modified titanium dioxide. According to the preparation technology, the doped modifying elements are C and Y; the concrete process of doping the modifying elements comprises the steps of firstly, dropwise adding a yttrium nitrate solution into the precursor sol, then dropwise adding a glucose solution, and controlling the molar ratio of the Y to the C to the TiO2 in the modified titanium dioxide to be (0.002-0.006): (0.06-0.54): 1. The preparation technology is simple in operation, creatively enables the titanium dioxide to be doped with the C and the Y, and achieves a synergistic effect by combining the titanium dioxide with the C and the Y; furthermore, the doped Y and C can effectively inhibit the increment of the grain size of the titanium dioxide, so that the specific surface area of the titanium dioxide is enlarged, and the photocatalytic performance of the titanium dioxide is improved.
Owner:HEBEI MILSON TITANIUM DIOXIDE
Low resistance ultraviolet light emitting device and method of fabricating the same
ActiveUS8415654B2More surface mobilityHigh crystallinitySemiconductor/solid-state device manufacturingSemiconductor devicesIndiumQuantum well
Owner:NIITEK
Donor-acceptor interfaces for excitonic semiconductors
PendingUS20210296602A1Low exciton binding energyEfficient exciton dissociationLight-sensitive devicesSolid-state devicesHeterojunctionPolymer chemistry
Provided is a thin film semiconductor device that exploits excitonic characteristics of various organic semiconductor materials. The device may include an anode (120), a cathode (170), and a donor-acceptor heterojunction (150) disposed between the anode and the cathode. The donor-acceptor heterojunction may further include an acceptor material (404) having a highest occupied molecular orbital (HOMO) and a lowest unoccupied molecular orbital (LUMO), and a donor material (402) comprising a hybrid organic-inorganic metal halide perovskite semiconductor. Other embodiments are disclosed and additional embodiments are also possible.
Owner:THE TRUSTEES FOR PRINCETON UNIV
A method for vacuum scattering and joining-up carbon-carbon composite material
InactiveCN101161397AThermal deformation flow stress dropImprove thermoplasticityNon-electric welding apparatusCarbon compositesShape change
A vacuum diffusion connecting carbon / carbon composite material method belongs to the welding field of the carbon / carbon composite material. The present invention settles the problems of high jointing temperature, large metal deformation of the partial part of joint and inferior joint capability in the existing diffusion connecting carbon / carbon composite material. The invention comprises the following steps: 1. doing cleaning to the surface of the base metal; 2. homogeneously parking the diffusion middle layer to the connecting surface of the base metal to be welded; 4. reducing temperature then the welded component which is connected well is obtained. The diffusion connecting carbon / carbon composite material of the invention is reduced by 100 to 300 DEG C, the shear strength of the diffusion connecting between the carbon / carbon composite material and the carbon / carbon composite material or the carbon / carbon composite material to other metal material is increased by 20 to 220 percent, and the metal at the joint has no evident shape change.
Owner:HARBIN INST OF TECH
Method for preparing spherical bimetallic MCo-MOFs catalytic material through microwave-ultrasonic wave synergistic assistance
ActiveCN112452357AFast and even heatingEnhanced mass transferOrganic chemistryOrganic-compounds/hydrides/coordination-complexes catalystsCobalt saltDicarboxylic acid
The invention discloses a method for preparing a spherical bimetallic MCo-MOFs catalytic material through microwave-ultrasonic synergistic assistance, which comprises the following steps: firstly, preparing a spherical bimetallic MCo-MOFs precursor through synergistic assistance of a metal salt I (metal cobalt salt), a metal salt II and aromatic dicarboxylic acid in a microwave-ultrasonic combinedmode; and further the precursor solution is crystallized through a hydrothermal rotation method to prepare the spherical bimetallic MCo-MOFs catalytic material. The method is simple in process, low in cost, convenient to operate and high in yield, and the prepared product is uniform in particle size, controllable in form and high in catalytic activity.
Owner:HUBEI UNIV
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