542results about How to "Physicochemically stable" patented technology

The invention relates to a method for preparing a lithium ion battery anode material doped with a nanometer oxide, belonging to the technical field of manufacturing processes of lithium ion battery batteries. The method is characterized in that trace amount of nanometer oxide power is doped in the preparation process of lithium manganate, lithium cobaltoxide and lithium iron phosphate; the doping amount is 0.5-1.0 mol percent of lithium salts; and the nanometer oxide is selected from one or two of alumina, magnesia, titanium oxide, chromic oxide, nickel oxide, monox and zirconia and the nanometer oxide is subject to ball milling, drying, sieving, calcinating, crushing, grading and other processes to obtain the nanometer oxide doped or coated lithium ion battery anode material. The lithium ion battery anode material has reversible initial capacitance, and remarkably-improved attenuation property, charging-discharging properties, high-temperature circulating property and electrochemistry stability.

The invention relates to ultrahigh-malleability tunnel supporting anchor pile steel of converter continuous cast billet and a production method, which belongs to the technical field of a mine anchor rod. The anchor rod steel comprises the following components by weight percent: 0.5 to 0.70 percent of carbon, 0.15 to 1.20 percent of silicon, 0.5 to 2.5 percent of manganese, less than or equal to 0.045 percent of phosphorus, less than or equal to 0.045 percent of sulfur, 0 to 1.00 percent of chrome, 0 to 1.00 percent of nickel, 0 to 1.00 percent of molybdenum, 0 to 0.30 percent of copper, 0.03 to 0.40 percent of vanadium, 0.01 to 0.2 percent of aluminum, 0 to 0.10 percent of titanium, 0 to 0.10 percent of boron, 0.001 to 0.0 percent of niobium, 0.004 to 0.020 percent of nitrogen, and iron for the surplus; the yield strength Rel is larger than or equal to 600 MPa, the percentage elongation delta 5 is larger than or equal to 20 percent, the impact strength is 20 DEG C, Akv is larger than or equal to 27 J, and the breaking load is larger than or equal to 300 KN. By adopting the production process flow of converter crude metallurgy, LF furnace fine metallurgy and full protection continuous casting, the steel grade has the advantages that the purity is high, the structure is dense, the grain is fine, the physical chemistry properties of the steel are stable, the over-all mechanical property is good, the production operation and process flow are simple, and the rolled metal finished product can be directly used without heat treatment to the rear part.

The invention relates the dysprosium-iron alloy technology with fused salt electrolysis process and device, belonging to rare-earth products preparing field. The method comprises the following steps: at high temperature, dysprosium oxide melting at fluoride, dysprosium oxide beginning ionizing; at the condition of 95V/M direct current field, separating out Dy3+ on the surface of iron cathode, deacidizing Dy3+ to Dy, and alloying Dy and Fe to form Dy-Fe. O2- is oxygenated to O2 on the surface of graphite cathode, and it reacts with carbite to form CO2. The melting point of dysprosium-iron (20úÑFe) is 1046Deg.C, and the melting point of Dy is 1407Deg.C, so the electrolyzation is carried out at 1050Deg.C. The invention has the advantages of low investment, low cost, simple technology, continuous production and low impurity content.

The invention relates to a tris(dichloropropyl) tribromophenoxy chloropropyl silicate compound which is a silicon-halogen synergistic fire retardant, and a preparation method of the compound. The compound has a structure shown in a formula described in the specification; and in the formula, OC3H5Cl2 is OCH2CHClCH2Cl or OCH (CH2Cl) 2. The preparation method of the compound comprises the following steps: reacting tribromophenyl glycidyl ether and silicon tetrachloride according to the same molar ratio in an organic solvent for 4-6h at 60-80 DEG C; then dropwise adding dichloropropanol according to a certain molar ratio, reacting for 4-8h at 50-100 DEG C; and finally purifying to obtain faint yellow liquid which is the tris(dichloropropyl) tribromophenoxy chloropropyl silicate. The compound is applicable to fire retardants for polyvinyl chloride, polyurethane, epoxy resin, unsaturated resin and other materials; and the production process is simple, low in equipment investment and cost, and suitable for industrial production.

The invention relates to a method for cladding a copper alloy layer on the surface of a steel substrate by laser brazing. A method of feeding powder by argon gas, cladding by laser brazing and vacuum heat treatment is used on a laser machine for cladding a copper alloy layer on the surface of the steel substrate by laser brazing; the laser machine is used for remelting and curing the surface of the steel substrate firstly; and laser beams irradiate in all directions according to the geometric locus of ring steel set by computer programs to enable copper alloy powder and borax powder to be melted and cured on the surface of the steel substrate to form the copper alloy layer. The thickness of the copper alloy layer is 0.5mm; the average microhardness of the copper alloy layer is 375HV0.2 which is 2 times of the average microhardness of the steel substrate; and compared with the steel substrate, the wear resistance of the copper alloy layer is improved by 52.8%, and the corrosion resistance of the copper alloy layer is improved by 45.3%. The method has advanced processes and reasonable parameters; the metallographic structure of the cured and melted layer is compact and firm and can not fall off easily; and the method can be used for cladding alloy layers on the surfaces of steel substrates of various molded surfaces by brazing and can be used for cladding alloy layers on various molded surfaces and special-shaped non-standard molded surfaces, thereby greatly improving the performance of the surfaces of the steel substrates.

The invention relates to an electrode Ce doped PbO2 used for treating waste water and its preparation method. The electrode is a F-PbO2-CeO2/TiO2-NTs/Ti electrode. The method for producing the electrode comprises that: obtaining a titania nano-tubes array (TiO2-NTs/Ti) matrix prepared by an anodization processing, doping rare earth Ce, preparing a doped-type F-PbO2-CeO2/TiO2-NTs/Ti electrode by using an electrodeposition method. Compared with the prior art, the PbO2 electrode by the present invention has the advantages of high oxygen evolution potential, strong catalytic activity, stable electrode electrochemical performance and long service life. Compared with the traditional PbO2 electrode, the oxygen evolution potential of the electrode is higher than 2.4 V, and accelerated and strengthen life is more than 400 hours, the service life can reach about 40 years. The electrode has the advantages of simple preparation technology and low manufacturing cost, and can be effectively used for an electrochemical oxidation treatment of organic waste water which has high density and is difficult to degrade, the electrode also has a wide economic and social benefit.

A multipurpose radiation proof material with wide spectrum in environmental protective type is prepared in weight share from 20-60 share of multi-composition radiation proof material, 15-30 share of inorganic cementing material, 0-60 share of packing material and 0-50 share of intensifying material. The prepared material can be used to make various wall bodies and composite slab material.

The invention discloses a preparation method of a magnetic graphene oxide demulsifying agent. The magnetic graphene oxide demulsifying agent is prepared by taking magnet powder as a carrier and loading graphene oxide on the surface of the carrier; the use amount ratio of the magnet powder to ethanol to water to a silane coupling agent to the graphene oxide is (1g to 5g) to (70mLto 95mL) to (5mL to 30mL) to (0.2g to 1g) to (1g to 5g). In preparation and application of the magnetic graphene oxide demulsifying agent provided by the invention, a magnetic separation method can be used, and high efficiency, time saving, energy saving and environment protection are realized; the application scale and range of the graphene oxide in an oil-water emulsion separation process can be easily expanded. The raw materials for preparing the demulsifying agent are easy to obtain, low in cost, stable in physical and chemical properties and capable of being repeatedly used and secondary pollution is avoided; the demulsifying agent has huge social and economic value and a wide application prospect.

Disclosed is a 700V high-voltage aluminum electrolytic capacitor electrolyte. The electrolyte comprises 50-80% of main solvent, 20-50% of auxiliary solvent, 5-20% of main solute, 2-10% of auxiliary solute, 0.1-1% of auxiliary additive and 5-15% of spark additive, wherein the main solute comprises one or more of azelaic acid, ammonium hydrogen azelate, ammonium sebacate, decane dicarboxylic acid, 7, 9-dimethyl-7, 9-dimethoxy carbonyl-1, 11-dodecane dicarboxylic acid, and 7, 8-dimethyl-7, 8-dimethoxy carbonyl-1, 14 tetradecane dicarboxylic acid; and the auxiliary solvent comprises one or more of ammonium salicylate, salicylic acid, oxalic acid, malonic acid, succinic acid, ammonium benzoate, ammonium maleate, ammonium hydrogen maleate, ammonium adipate and hexanedioic acid. The spark voltage of the electrolyte is greater than 700V; and in addition, the electrolyte is simple to prepare, stable in performance and excellent in related parameters.

The invention relates to a composite flame retardant for polyesters and an application method thereof. The flame retardant is prepared through compounding any one of melamine cyanurate (MCA), melamine polyphosphate (MPP) and aluminium diethyl hypophosphite (1240) with bis(1-oxyphospha-2,6,7-trioxa bicyclo[2.2.2]octyl-4-methyl) phenyl thiophosphate (PPS-PEPA) in any weight preparation. The flame retardant disclosed by the invention has the advantages of multielement synergy, good material compatibility, high flame retardancy, environmental friendliness, and capability of reducing the application costs and the like.

The invention relates to a TiO2 nanosheet vertically growing on the surface of a carbon-based electrode and a preparation method of the TiO2 nanosheet and belongs to the technical field of the nanomaterials. The preparation method of the TiO2 nanosheet comprises the following four steps: performing pretreatment on a substrate; performing an in-situ hydrothermal reaction on the pretreated substrate in a sodium hydroxide solution, which is a process of dissolution and recrystallization, and adding a certain amount of structural inducer to form a nanosheet array evenly grown in such a manner of being perpendicular to the surface of the substrate; performing washing and acid soaking, namely repeatedly washing the generated TiO2 nanosheet by use of ultrapure water after the reaction is completed and soaking the TiO2 nanosheet in an acid until the TiO2 nanosheet is neutral; and calcining for a while at a certain temperature in an N2 protection atmosphere to obtain the single-crystal vertically grown TiO2 nanosheet. The TiO2 nanosheet has excellent biocompatibility, stability and environmental friendliness; the preparation method is simple; the vertically grown TiO2 nanosheet is capable of reducing the resistance to electron transfer and can be applied to a microbial fuel cell (MFC) to improve electric quantity output.

The invention relates to praseodym or praseodym-europim doped strontium lithium silicate yellow-red fluorescent powder and a preparation method thereof. The fluorescent powder utilizes strontium lithium silicate as a medium, can be effectively triggered by blue light with the wavelength of 400-500nm by codope of the praseodym and europium, and has a doublet broadband transmission characteristic (the main peaks are respectively 580nm and 610nm); and the fluorescent powder can be triggered by blue light with the wavelength of 440-490nm to transmit strong red fluorescence (the main peak is a narrow band of 610nm) by single dope of praseodym. The chemical composition of the fluorescent powder has a general formula as Li2Sr1-x-ySiO4:xEu2+, yPr3+, wherein x is no less than 0 and no more than 0.02, so is y. The excitation spectrum of the fluorescent powder has good matching with a blue light LED chip, so the fluorescent powder can be used in assembly of a white light LED with a high color rendering index; and the preparation process is easy to control, and the basic equipment of the current fluorescent powder plants can be used for realizing industrialized production, thus the fluorescent powder is novel and has application potential.

The invention relates to spherical terbium doped tungstate green phosphor powder and a preparation method thereof; the phosphor powder is spherical crystal; the particle size distribution is 1 to 5 mum, and the center particle diameter D50 is 3 to 4 mu m; and the chemical molecular formula is R1-2x(Tb, Na)2xWO4, wherein, R is one of Ca, Sr and Ba, and x equals to 0.01 to 0.2. The Tb3+ doped alkaline earth tungstate green phosphor power obtained by adopting the invention is nanometer crystal; the particles have regular shape, even size distribution, good phosphor powder optical property and stable physical and chemical properties; under the excitation of the ultraviolet ray, X-ray and energetic particles, the Tb3+ doped alkaline earth tungstate green phosphor power can achieve visible light emission when the wavelength is 545nm, and realize high energy conversion; besides, the emission wavelength is conducive to lighting and color and positioned on the sensitive response wave band of CCD simultaneously; and the spherical terbium doped tungstate green phosphor powder and the preparation method thereof have wide application prospects in the fields such as lighting, plasma flat-panel display, etc.

The invention relates to a floating gate type field effect transistor memory with a rapid data erasing and writing function and a manufacturing method thereof, which belong to the technical field of memories. In the prior art, the aspect of improving the erasing and writing effects of memories is mostly not very obvious. According to the memory provided by the invention, a silicon wafer with a silicon oxide layer is used as a substrate, the memory sequentially comprises few layers of graphene serving as a floating gate layer, hexagonal boron nitride serving as an insulating layer and novel two-dimensional materials (platinum disulfide and rhenium disulfide) serving as a channel layer from the substrate to the top, and further comprises a source electrode and a drain electrode which are formed on the channel layer by utilizing an evaporation process, and while rapid writing of the data is realized, rapid erasing of the memory data is also realized.

The invention discloses a method for preparing a silver/cadmium sulfide/titanium dioxide composite photocatalytic material. According to the method, TBOT and Cd(NO3)2.4H2O are taken as raw materials to prepare CdO/TiO2 with the evaporation-induced self-assembly (EISA) method firstly, then CdO/TiO2 and Na2S.9H2O are taken as the raw materials to prepare CdS/TiO2, and finally CdS/TiO2 and AgNO3 are taken as raw materials to prepare the silver/cadmium sulfide/titanium dioxide ternary composite photocatalytic material with the photodeposition method. The composite material is an inorganic photocatalytic material, is stable in performance, quite high in photocatalytic activity and resistant to chemical corrosion and photocorrosion, and has important significance in photolysis of water, sterilization, preparation of solar sensitization batteries, environment protection and other fields.

The invention discloses red fluorescent powder capable of being simultaneously effectively excited by near ultraviolet and blue LED light. In the red fluorescent powder, ZnMoO4 is taken as a substrate, Eu3+ is taken as an activation center, and one or more of Li+, Na+, K+, Rb+ and Ag+ are taken as charge compensators, and one or more of Bi3+, Sm3+, Gd3+, Sc3+, Y3+, La3+, Gd3+ and Yb3+ with proper concentration are introduced to partially replace Zn so as to improve the absorption of the Eu3+ under the excitation at 395 nm and 466nm. The chemical composition general formula of the red fluorescent powder is Zn1-2x-y-zAxByMoO4:EuxBizSmw, wherein A is one or more of Li, Na, K, Rb and Ag; B is one or more of Sc, Y, La, Gd and Yb; and x is more than or equal to 0.05 and less than or equal to 0.4, y is more than or equal to 0 and less than or equal to 0.1, z is more than or equal to 0 and less than or equal to 0.1, and w is more than or equal to 0 and less than or equal to 0.05. The invention is applied to the preparation of the red fluorescent powder capable of being simultaneously effectively excited by the near ultraviolet and blue LED light.

The invention relates to europium-doped hydrated zinc molybdate high-efficient red fluorescent powder and a preparation method thereof. The main crystalline phase of the fluorescent powder is zinc dimolybdate pentahydrate (or calcium, gadolinium and other alkaline earth or rare earth metal replacing parts of zinc); and during synthesizing, batching is carried out according to a general formula of A1-x-yMoO4:EuxBy. The preparation method comprises the following steps of: reacting the prepared zinc-containing and zinc-substituted ionized calcium and rare earth ion solution with an alkali metal or ammonium molybdate under appropriate conditions; regulating PH (Potential of Hydrogen) to completely precipitate; filtering directly or filtering after aging for a period of time, and washing the precipitate; and drying at a normal temperature to finish the preparation. According to the invention, the preparation method is simple and easy to operate; moreover, the red fluorescent powder has a good luminous effect and stable physical and chemical properties, can be well matched with near-ultraviolet and blue-light LED (Light Emitting Diode) chips, and can be used as red fluorescent powder of a novel high-efficient white-light LED.

The invention discloses a method for manufacturing a high-strength and energy-saving xonotlite heat-insulation product. On the basis of a high-density plate production process based on a static method, xonotlite slurry synthesized by using a dynamic hydrothermal method is added to reduce the density of a plate so as to obtain the high-strength and energy-saving xonotlite heat-insulation product with moderate density and relatively high strength. Meanwhile, a layer of aluminum foil is coated to ensure that the product has water resistance, the heat insulation effect of materials is enhanced, and the condition of the product is optimized.

The invention belongs to the technical field of lithium ion battery material manufacturing process and discloses a Ce1-xZrxO2 nano solid solution homogenate modified lithium ion battery anode material and a preparation method thereof. A LiNixCoyM(1-x-y)O2 material preparation process includes: forming a coating of a nanoscale metal oxide according to a homogeneous precipitation method, wherein the nanoscale metal oxide refers to Ce1-xZrxO2 nano solid solution; after coating is finished, drying the coating, heating to 200-1000 DEG C at a heating temperature of 1-5DEG C/min, keeping the temperature for 2-20h, and naturally cooling to obtain the Ce1-xZrxO2 nano solid solution homogenate modified LiNixCoyM(1-x-y)O2 material. The prepared LiNixCoyM(1-x-y)O2 material has excellent high-temperature cycle performance and electrochemical interface stability. Compared with a traditional solid-phase method, the modification method is high in uniformity and reliability.

The invention provides a method for preparing a carbon microsphere by utilizing waste cotton fibre. The waste cotton fibre is taken as raw material, deionized water is taken as reaction medium, and washing, disinfecting, cutting into strips, fading, soaking, dispersing, heating, pressurizing and stirring in a reactor, product washing, drying and grinding are carried out, thus the cotton fibre carbon microsphere the surface of which contains an active group is obtained. The technological process is advanced, no acid-base catalyst is used, no environmental pollution is produced, the cotton fibre carbon microsphere has stable physical and chemical performances, multiple groups can be directly grafted on the surface of the carbon microsphere without modification, and functional fiber can be prepared when the carbon microsphere is blended with polyester fibre, polyphenylene sulfide fibre and polypropylene fibre, thus the method provided by the invention is perfect for preparing the active carbon microsphere by utilizing the waste cotton fibre, and an advanced method is provided for recycling the waste cotton fibre.