33results about How to "Small atomic radius" patented technology

The invention discloses a corrosion resistant film prepared by a magnesium alloy surface hydrothermal method and a preparation technology thereof, belongs to the technical field of magnesium surface processing, and solves the problem of bad corrosion resistant property of magnesium alloy in the prior art. The technology provided by the invention comprises the following steps: placing a processed magnesium alloy sample into a hydrothermal reactor, then injecting a treating fluid into the reactor according to a certain filling degree, and putting the reactor into a thermotank to maintain the temperature. The treating liquid comprises sodium hydroxide and lithium salt, sodium hydroxide provides a proper alkaline environment for film forming, lithium salt has a large solubility in water, Li+ can hydrolyze in water with a great amount at a certain temperature, so the pH value of the solution is improved so as to promote the film forming reactions on the magnesium alloy surface to move in the positive direction, the obtained film in situ grows on the magnesium alloy surface; the force between the film and the substrate body is excellent, the film is uniform, compact and ultra-thin, and has an excellent corrosion resistant property; the corrosion current density of the conversion film is increased by five magnitude orders compared to that of the substrate body, and reaches 10<-9> A/cm<2> magnitude grade.

The present invention is a new class of fluorescent sensor with unprecedented sensitivity, selectivity and synthetic efficiency for the identification and qualitative and quantitative detection of transition metal ions. The chemosensing properties are based on an internal charge transfer mechanism or photo-induced electron transfer and are effective in vitro. The chemosensor comprises one or more electron donating dipyrrin functionalities linked to an electron withdrawing functionality. The chemosensor forms a stable transition metal complex through internal charge transfer between the electron donating functionality and the target transition metal, which results in measurable fluorescence. Specific examples for sensing zinc and copper ions are described.

The invention relates to a near-infrared nano photosensitizer as well as a preparation method and application thereof, and relates to the technical field of photosensitizers. According to the near-infrared nano photosensitizer disclosed by the invention, the absorption and emission spectrum of the near-infrared nano photosensitizer is close to a near-infrared light region by performing conjugate extension modification on a BODIPY parent nucleus; introducing a polyfluoroalkane group and a polyethylene glycol group into the BODIPY structure to obtain the amphiphilic photosensitizer; the nano photosensitive micelle with an ultralow CMC (Carboxymethyl Cellulose) value is finally constructed by utilizing the strong fluorine-fluorine action between the polyfluoroalkane groups and the hydrophilic action of the polyethylene glycol groups; j-aggregation of the BODIPY is induced by utilizing a fluorine-fluorine effect, so that the maximum absorption peak of the BODIPY is red-shifted to a near-infrared region, and deep phototherapy of tumors is facilitated.

The invention belongs to the field of protective films, and relates to a polyester film protective film, which comprises a polyester film and a pressure-sensitive adhesive layer coated on the surfaceof the polyester film, the resistance of the pressure-sensitive adhesive layer is less than 10<10> ohm/square; the pressure-sensitive adhesive layer contains acrylate resin; the acrylate resin is prepared from a long-chain acrylic monomer, a fluorine-containing acrylic monomer, an acrylate hard monomer, an acrylate soft monomer and an acrylate functional monomer through free radical polymerization. According to the technical scheme, wettability and optical performance of the surface of the optical component can be considered at the same time.

The invention relates to a composite manufacturing method of an acid leaching stirrer. Iron-based amorphous powder is taken as a spraying material, the supersonic flame spraying technology is adoptedto accelerate the heating of the powder, and an iron-based amorphous coating with the thickness of 150-250 [mu]m is prepared on the surface of a stirring shaft or a paddle. The iron-based amorphous powder is prepared from the following components in percentage by mass: 0-25% of chromium, 0-10% of molybdenum, 0-5% of tungsten, 0-12% of niobium, 0-4% of lutetium, 0-7% of manganese, 0-5% of boron, 0-4% of carbon, 0-3% of silicon, 0-2% of rare earth element and the balance of iron. The service life of the prepared composite material stirring shaft and paddle is several times longer than that of traditional stainless steel products.

The invention relates to a method for manufacturing a photoelectric detection unit or a focal plane device by using a molecular beam epitaxy method, comprising the steps of: growing a buffer layer, a light absorption layer and an epitaxial structure of a wide bandgap cap layer on a conductive substrate by applying a molecular beam epitaxial growth technology, and then continuously growing a high-Be-doped or delta-doped heterogeneous narrow bandgap lamella to serve as a diffusion source layer; and (2) etching the diffusion source layer by using a conventional graph processing technology to form a locally doped source graph, forming a pn (positive negative) junction under the protection of a passivated dielectric film by applying a diffusion technology at the diffusion temperature of 450-600 DEG C, and then, manufacturing an electrode to form the photoelectric detection unit or the focal plane device. The method provided by the invention has the advantages of universality and simplicity, a doping junction-forming process is combined with the advantages of junction-forming convenience of a table-board type in-situ doping junction-forming process and good passivation effect of a planer type diffusion junction-forming process in the manufacturing of the photoelectric detection unit, the device process is simplified and the device property is improved.

The invention discloses magnalium alloy cutting fluid with excellent wear and extreme pressure resistance. The aluminum alloy cutting fluid is prepared from the following raw materials in parts by weight: 8 to 16 parts of boric acid ester, 5 to 15 parts of lubricating additives, 3 to 6 parts of water-soluble imidazoline corrosion inhibitors, 1 to 4 parts of carborane superacid, 2 to 5 parts of alkylphenol polyoxyethylene, 1 to 3 parts of triethanolamine oleate, 2 to 4 parts of alpha-sodium olefin sulfonate, 1 to 4 parts of alkylolamides, 2 to 5 parts of diethanol amine sebacate, 3 to 5 parts of dodecenylsuccinic acid, 1 to 5 parts of borax, 2 to 6 parts of triethanolamine, 1 to 3 parts of sodium benzoate, 2 to 8 parts of absolute ethyl alcohol and 4 to 12 parts of simethicone. The aluminum alloy cutting fluid provided by the invention has the excellent wear and extreme pressure resistance; the lubrication and anti-rust performance is excellent.

The invention discloses a catalyst and a preparation method thereof, and a method for preparing laurolactam through a gas phase rearrangement reaction. The catalyst comprises fluoride modified rare earth doped Al2O3-SiO2-ZrO2 and fluorine-containing sulfonated polyetheretherketone, and the loading capacity of the fluorine-containing sulfonated polyetheretherketone in the catalyst is 20-50wt%, preferably 30-45wt%. When the catalyst is used for catalyzing gas-phase rearrangement of cyclododecanone oxime, the conversion rate of cyclododecanone oxime reaches 99% or above, the selectivity of laurolactam reaches 99.5% or above, the service life of the catalyst reaches 3000h or above, no ammonium sulfate byproduct is produced in the reaction, the mechanical strength of the catalyst is high, and the problems of equipment corrosion and environmental pollution of a traditional liquid-phase rearrangement process are solved.

The invention discloses waste polystyrene foamed plastic modified coating which comprises the following ingredients in parts by weight: 100-150 parts of fluorosilicon resin, 50-60 parts of modified waste polystyrene foamed plastics, 50-60 parts of anion powder, 30-40 parts of light calcium carbonate, 30-40 parts of modified CNTs (carbon nano tubes), 30-40 parts of nano-silver, 30-40 parts of calcium hydroxide, 20-30 parts of titanium dioxide, 15-30 parts of coal ash, 15-25 parts of nano-SiO2, 3-5 parts of a surfactant, 1-2 parts of a silane coupling agent and 1-2 parts of a flatting agent. Dueto the application of the modified waste polystyrene foamed plastics in the coating, so that on one hand, the recycling of resources is achieved; on the other hand, the characteristics of the modified waste polystyrene foamed plastics of being hard in texture and good in transmission of light can be utilized, and the flexibility of the plastics is enhanced after the plastics are modified.

The invention provides a hydrophilic anthracene fluorescent dye and a synthesis method thereof. By introducing a sulfonic acid group and a difluoro substituent group, the hydrophilicity and stabilityof the anthracene fluorescent dye are improved. The synthesis method mainly comprises the following steps: reacting halogenated benzaldehyde with a phenyl Grignard reagent to generate a benzhydrol derivative; oxidizing an alcoholic hydroxyl group into a keto carbonyl group to obtain a benzophenone derivative with a phenolic hydroxyl group protecting group; converting the keto carbonyl group into dithioketal by using ethanedithiol for protection; carrying out fluorination by using a fluorine reagent to obtain an anthrone difluoride compound; conducting reacting by using a lithium reagent to achieve conversion into a lithium Grignard reagent; conducting oxidizing to obtain benzophenone; removing a protecting group from benzophenone, and carrying out cyclization reaction under an acidic condition; and carrying out sulfonation reaction on the obtained fluorinated fluorescent dye to obtain the fluorinated fluorescent dye.

The invention discloses an aluminum-silicon-magnesium casting alloy mechanical property improving method. Light rare earth is adopted and cooperates with heavy rare earth to process alloy melt, and the iron content is 0.09-0.20 wt% of the alloy melt mass. According to the improving method, based on the difference, in the aspect of physicochemical property, between light rare earth elements and heavy rare earth elements as well as the influence on the alloy crystallization process, the method of utilizing the light rare earth and the heavy rare earth to be combined and modified to control the microstructure and mechanical property of alloy is provided, the light rare earth and the heavy rare earth give play to advantage separately, namely, the light rare earth is focused on enriching on thealpha-Al and Si crystal solidification front and being adsorbed on the surface of crystal, and achieves the effects of refining and modifying; and the heavy rare earth is focused on adsorbing or conducting solid solution on iron-rich Al-Fe and Al-Fe-Si group harmful compound, influencing the microstructure of the compound, impeding growth of crystal, and promoting the compound to be decomposed into short rod-like shape or granular shape at the high temperature; and the light rare earth and the heavy rare earth achieve mutual complementarity in the aspect of controlling the microstructure of the alloy, and substantially, the quite good modifying effect is achieved.

The invention belongs to the pesticide and fungicide fields, in particular relates to a preparation method and application of tetrafluoro chlorothalonil (2,4,5,6-tetrafluoro-1,3-dicyanobenzene) microemulsion. The tetrafluoro chlorothalonil microemulsion with good physical and chemical stability and high dispersibility can be prepared by screening from various emulsifiers, cosolvents, penetrants and stabilizers. The microemulsion is characterized in that the tetrafluoro chlorothalonil microemulsion comprises the following components: 5-50% of tetrafluoro chlorothalonil, 7-27% of emulsifier, 5-18% of penetrant, 5-26% of cosolvent and the balance water. The fungicide form of the invention is microemulsion using water as solvent so as to avoid the unsafety of production, operation and storage caused by largely used organic solvent and is characterized by wide anti-fungal spectrum, low dosage and environmental friend; and the microemulsion has obvious drug effect for controlling Pyriculariagrisea, Alternaria alternate, Pellicularia sasakii and Botrytis cintrea.

Provided is an organic electroluminescent device which comprises an anode, a hole injection layer, a first hole transmission layer, a first luminescent layer, a first electron transmission layer, a charge generation layer, a second hole transmission layer, a second luminescent layer, a second electron transmission layer, an electron injection layer and a cathode which are laminated in turn. Material of the charge generation layer comprises fullerene material, and lanthanide oxide and lithium salt which are doped in fullerene material, wherein mass ratio of lanthanide oxide to fullerene material is 1:100-1:10, and mass ratio of lithium salt to fullerene material is 1:5-3:5. The aforementioned organic electroluminescent device is relatively high in luminescence efficiency. The invention also provides a preparation method for the organic electroluminescent device.

The invention discloses a GdTbHoEr material with high saturation magnetization. The GdTbHoEr material is prepared by taking Gd, Tb, Ho and Er as raw material and carrying out electric arc melting, wherein the chemical formula of the material is GdTbHoEr, and the material with high saturation magnetization has a single close-packed hexagonal crystal structure; and the element components further comprise one or two of La and Y. When being used as a magnetic material, the material has the magnetic phase transformation characteristic, and the saturation magnetization reaches 290-300 emu/g when thetemperature is lower than the Neel temperature; the high-entropy alloy GdTbHoEr is used as a matrix, La and Y are added, the magnetic transition temperature of the alloy is regulated and controlled within the range of 190 K-120 K, and the coercive force of the alloy is regulated and controlled within the range of 600 Oe -1706 Oe. The high-saturation magnetization intensity material has the characteristics of high magnetization intensity, wide existing temperature range, adjustable components, adjustable Neel temperature, simple and diversified process and low overall preparation cost, and issuitable for industrial production.