120results about How to "Not oxidized" patented technology

The invention discloses a method for light, powder and gas co-axial transmission laser cladding forming manufacturing, which is characterized in that: a circular section solid laser beam emitted by a laser is subjected to transformation and beam expansion by the optical path transformation to become a circular laser beam; the circular laser beam is focused to become a hollow circular cone focused laser beam; a powder spraying nozzle is arranged on the hollow part of the circular cone focused laser beam; the powder spraying nozzle and the circular cone focused laser beam are coaxial; the periphery of a single powder beam sprayed by the powder spraying nozzle is provided with a circle of collimation shielding gas curtain; and the collimation shielding gas curtain, the circular cone focused laser beam and the single powder beam sprayed by the powder spraying nozzle are coaxial. By arranging the collimation shielding gas curtain on the periphery of the powder beam, the method realizes the coaxial transmission of light, powders and gas and solves the defects in the prior art.

The invention relates to a partial pressure sintering method for sintering a neodymium-iron-boron magnet. Certain inert gases Ar are filled into various deflation sections in the sintering process, the pressure of the Ar gases inside a furnace is regulated according to blank deflation velocity and vacuum pump system exhaust velocity through vacuum degree control, so that heating sintering is carried out by uniformly deflating under different partial pressures of the Ar gases, and negative pressure is still kept. The partial pressure sintering method disclosed by the invention ensures the consistency and uniformity of magnetic property and saves the sintering time.

The invention relates to a method for preparing graphene load nano silver-nickel alloy composite powder materials. The method aims to solve the problems that graphene load nano silver-nickel alloy composite materials prepared in the prior art are nonuniform in scattering and poor in chemical stability. The method comprises the first step of intercalation and expansion, the second step of stripping and the third step of the preparation of the graphene load nano silver-nickel alloy composite powder materials. Oxidized graphene is prepared through an oxidation-reduction method, then the oxidized graphene, silver ions and nickel ions are mixed and restored through reducing agents to obtain the graphene nano silver-nickel alloy composite materials, the method is simple and fast, any surface dressing agent does not need to be added, and alloy particles on the surface of the graphene are uniform in distribution and stable in chemical performance. The method is used for preparing the graphene load nano silver-nickel alloy composite powder materials.

The invention provides a method for extracting pleurotus eryngii polysaccharide from pleurotus eryngii leftovers by using subcritical water. The method comprises the following steps of: feeding the pleurotus eryngii leftovers into an extraction kettle; feeding deoxidized deionized water according to a material-liquid mass volume ratio of 1:(5-30); controlling the extraction pressure to be 3-10MPa, the temperature to be 100-250 DEG C and the extraction time to be 10-60min; filtering, cooling and centrifuging; carrying out ultrafiltration by using an ultrafiltration film of which the molecular weight cut-off is 100-300kD; cutting off the filtrate by using an ultrafiltration film of which the molecular weight cut-off is 3-10kD; feeding the crude polysaccharide cut-off liquid into an anion exchange resin column; and eluting by using deionized water; and concentrating under reduced pressure and drying the collected polysaccharide eluate so as to obtain a pleurotus eryngii polysaccharide product. According to the method, a subcritical water extraction technique is combined with the separation means of ultrafiltration edulcoration and resin absorption decoloration, no organic solvents are used in the whole process, the extraction process is green and environment-friendly, and the pleurotus eryngii polysaccharide is high in purity and is applicable to industrial production.

A dispenser of single-use portions of preparations for beverages, comprising a structure that supports at least one storage assembly for single-use portions provided with a discharge outlet for the discharge of the portions, at least one distribution assembly for the portions which is provided with an outlet for dispensing said portions and with a device for transferring the portions from the discharge outlet to the dispensing outlet, which are interposed between the storage assembly and the distribution assembly.

The invention provides a large-size high-density tungsten crucible which is mainly used for sapphire crystal growth industry, and particularly provides a preparation method for the large-size high-density tungsten crucible. The method comprises the following steps: raw materials processing, mould core manufacturing, mould setting and forming, high-temperature sintering and mechanical processing. Compared with the prior art, the produced crucible is large in size range and suitable for mass production. Moreover, no binding agent is added in the production process, and impurity content of the product is low; the finished product has the advantages of being high in density, large in size (maximal external diameter of phi 650 mm and maximal height of 800 mm), good in size adaptability and consistency, and high in yield and surface finish, can bear 2000-2300 DEG C high temperature under the protective atmosphere, and can not react with sapphire raw materials under the high temperature.

The present invention relates to slurry for printing wallpaper, and in particular to special slurry for printing wallpaper having a 3D stereo transparent streamer effect and a preparation method for the special slurry. The present invention provides special slurry for printing wallpaper having the 3D stereo transparent streamer effect. The slurry is mainly prepared by the following raw materials in parts by weight: 5-20 parts of dioctyl phthalate, 30-50 parts of polyvinyl chloride paste resins, 1-2 parts of a foaming agent, 1-5 parts of D80 environmental-friendly solvent oil, 10-30 parts of calcium carbonate, 10-30 parts of a plasticizer, 1-5 parts of a stabilizer, 5-8 parts of a VAE emulsion, 5-20 parts of titanium dioxide, 1-3 parts of a thickener and 1-3 parts of a drying speed regulator. The adhesive force of the slurry provided by the present invention is strong; meanwhile, the transparency effect can be displayed. The slurry is suitable for performing an embedding process on gold powder, silver powder and pearl powder in a gold spraying process, and can wrap up the gold powder, silver powder and pearl powder to promote the level of the wallpaper and prolong the service life of the wallpaper.

The invention relates to a method for producing a reduced coenzyme Q10. The method is characterized by comprising the following steps of: adopting cell lines or cell strains of all people and animals as female parents for producing the reduced coenzyme Q10; performing cell culture in biological culture agent DMEM-1 culture solution to obtain cell sap containing a great deal of the reduced coenzyme Q10; and obtaining a final product of the reduced coenzyme Q10 by a method of centrifugal separation and concentration or a method in which ethanol extraction and concentration is performed first and then cooling crystallization is performed. Compared with the conventional disclosed method for producing the reduced coenzyme Q10, the reduced coenzyme produced by the method is stable and is not oxidized by oxygen in the air, not only has no residue of a reducing agent but also has no chemical residues of any antioxidant, protective agent and the like, can be used for foods, medicaments, cosmetics or injections for infusion, and has no immunogenicity reaction to a human body.

The invention provides back surface field aluminum conductive slurry used for preparing a silicon solar battery, and a manufacturing method thereof. The back surface field aluminum conductive slurry has a formula by mass percentage: 65-80% of aluminum powder, 10-19% of organic modifying solvent, 1-5% of lead-free glass powder, 0.1-8% of infiltration dispersant, and 0.1-3% of modifying nanometer level silicon powder, with the total amount being 100%. According to the back surface field aluminum conductive slurry obtained from the above formula, a sintered silicon chip and the aluminum powder and the nanometer level silicon powder in the slurry can form a silicon-aluminum alloy with a firm contact, thereby improving the electrical property and the photoelectric conversion efficiency of the battery, and the sintered silicon chip is required to be non-curved, have no aluminum bead, have a smooth surface, have no spot, have no lead, and meet environmental protection requirements.

The invention relates to a method for preparing carbon-coated LiFePO4 (lithium iron phosphate) for lithium ion batteries, belonging to the technical field of new energy materials. The synthesis process of the invention comprises the following steps: mixing and drying ultra-fine iron powder, phosphoric acid, simple organic matter and doping element compounds with the molar ratio of phosphate ions, iron ions and doping element ions being 1:y:z, wherein y is larger than or equal to 0.95 and smaller than or equal to 1, and the sum of y and z is 1; adding lithium-source compounds and water to the mixture in sequence, remixing and drying, wherein the molar ratio between the lithium ions and the phosphate ions is x:1, and x is larger than or equal to 0.95 and smaller than or equal to 1.05; and sintering the mixture on a microwave temperature at 500 to 950 DEG C for 5 to 40 minutes in the vacuum atmosphere or the non-oxidizing atmosphere. The ultra-fine iron powder is used as microwave absorption media and iron source materials, so as to the iron powder is capable of rapidly absorbing the microwave energy to cause the solid-phase reaction to be rapidly conducted. Compared with the prior art, the invention has the advantages of simple technological process and easily controllable operation; and the final product has the advantages of high purity, complete crystallization, high capacity and good cycle stability.

The utility model discloses a WC-Co-Cr thermal spraying powder and its preparation method and an application thereof. The WC-Co-Cr thermal spraying powder comprises: by weight, 86 parts of a tungsten carbide mixture, 9.8-10.2 parts of cobalt, 4.0 parts of chromium, 0.3-0.6 parts of titanium carbide and 0.3 parts of an anti-oxidant, wherein the tungsten carbide mixture comprises: by weight, 13.2-25.6 parts of tungsten carbide with the granularity of 0.05-0.2 micrometer, 15.0-31.5 parts of tungsten carbide with the granularity of 1.0-2.5 micrometer and 24.5-65 parts of tungsten carbide with the granularity of 4.5-9.0. The WC-Co-Cr thermal spraying powder provided by the invention has excellent toughness and corrosion resistance and can be used to effectively improve compactness of a coating which has been undergone thermal spraying. Thus, the WC-Co-Cr thermal spraying powder can be effectively used in preparation of a super-high pressure sealing and corrosion-resistant coating.

The invention aims to industrially produce ginkgolide B liposome medicinal composition injection and ginkgolide B liposome medicinal composition oral preparations through uniform formula, process and equipment by a molecule dispersing method. The invention provides a molar ratio formula of the component raw materials for preparing the ginkgolide B liposome medicinal composition, steps and method for preparing ginkgolide B liposome medicinal composition freeze-dried injection and oral preparations, and embodiments for preparation. The ginkgolide B liposome medicinal composition is used for treating cerebral and vascular diseases.

The invention discloses a pulse on-off valve type metal 3D printing device capable of realizing precise spray-deposition 3D printing formation of molten metal under the control of a pulse on-off valve. More specifically, the pulse on-off valve type metal 3D printing device is characterized in that a metal liquid is purified through melting and filtering, the precise controllable continuous spray of the molten metal is realized through controlling the pulse on-off of a rotating blade-shaped valve at a printing spray head, the movement of the spray head is controlled through a three-dimensional coordinate platform, a forming platform is provided with stable temperature by a printing substrate, and low-cost additive manufacturing equipment capable of realizing rapid metal melting, multistage purification and precise controllable spray deposition is finally designed.

The invention relates to a preparation method and application of a black TiO2 clad metal copper nanometer photocatalyst. The preparation method comprises the following two steps of firstly, preparation of nanocrystalline metal copper particles: synthesizing copper oxide-aluminum oxide compound, removing aluminum oxide and reducing nanometer copper oxide; and secondly, performing hydrolysis precipitation on a titanium source on surfaces of metallic copper nano particles under the protection of an inert or hydrogen atmosphere, and drying and performing vacuum roasting to obtain the black TiO2 clad metal copper nanometer photocatalyst. The preparation method has the advantages that nanocrystalline metal copper particles can be obtained without surfactant, and preparation cost is low. The photocatalyst prepared by the method is high in visible light region full-color response and high in photo-induced carrier separating efficiency, and good photo-reduction CO2 activity can be shown in visible light. Moreover, the metallic copper nano particles in the photocatalyst are not oxidized in a light-catalyzed reaction process.

The invention discloses a DFN packaged digital infrared temperature sensor. The sensor comprises a DFN packaging shell with a window in the top, a thermopile, a TC template and an ASIC module are arranged in the DFN packaging shell, an infrared optical filter is arranged at the window of the DFN packaging shell, and a closed space is defined by the infrared optical filter and the DFN packaging shell; the DFN packaging shell is provided with an air guide hole and an exhaust hole, the bottom of the DFN packaging shell is provided with a pin, and the inner wall of the DFN packaging shell is provided with a metal shielding layer and a SiO2 film. The DFN packaged digital infrared temperature sensor has the advantages of miniaturization, low cost, high electromagnetic shielding efficiency, highmeasurement precision, high readability, simple forming process, suitability for large-scale production and wide application.

The invention relates to camellia oil nano-emulsion and a preparation method thereof. Each 1000 mL of camellia oil nano-emulsion comprises the following components: 1 to 140 g of camellia oil, 1 to 250 g of oil phase, 1 to 140 g of an emulsifier, 1 to 140 g of a co-emulsifier, 1 to 50 g of an antioxidant and the balance of ultrapure water, wherein the total volume is 1000 mL and the average grain size is less than 100 nanometers. The preparation method comprises the following steps: (1) preparation of the oil phase: weighing the camellia oil, the emulsifier, the oil phase and the antioxidant, mixing, and heating and stirring at 37+/-3 DEG C to obtain the oil phase; and (2) preparation of the camellia oil nano-emulsion: under the condition of continuously heating, dropwise adding the ultrapure water into the oil phase while stirring until the oil phase is clear and transparent or blue opalescence occurs to obtain nano-emulsion. After the camellia oil nano-emulsionis prepared, the mechanical stability of the camellia oil is improved, the bioavailability of the camellia oil is improved and the curative effect is enhanced.

The invention discloses a high-efficiency high-temperature print head supporting multiple printing materials. The print head comprises a driving device, a circular water-cooling system, a material inlet, a high-pressure protection gas inlet pipe, a high-temperature liquid cavity and a heating device; the high-temperature liquid cavity is formed by a crucible; two filter layers are arranged in the high-temperature liquid cavity; multiple spraying holes are formed in the bottom of the high-temperature liquid cavity; a coaxial protection gas shield is arranged outside the high-temperature liquid cavity; a gas uniformizing sheet is arranged between the coaxial protection gas shield and the high-temperature liquid cavity; the heating device is arranged on the outer part of the coaxial protection gas shield; protection gas is introduced into the coaxial protection gas shield; and the material inlet is used for injection printing materials. The print head can be used for printing of metal or other materials which need to be molten at high temperature; the print head is provided with multiple spraying holes; the structure is compact; and the working efficiency can be improved. Different driving positions can be provided by the print head, so that the print head can be applicable to printing of different materials, and meanwhile, the print head is also applicable to printing of the same material with different liquid drop sizes.

The invention relates to a 6000-series high-performance aluminum alloy plate for an automobile panel and a manufacturing method thereof. The 6000-series high-performance aluminum alloy plate contains Si, Fe, Cu, Mn and Mg and comprises a 6016 high-performance aluminum alloy plate, a 6022 high-performance aluminum alloy plate and a 6111 high-performance aluminum alloy plate. The manufacturing method comprises the following steps: adding an alloy, determining a metallographical refinement level, casting an aluminum plate ingot of a certain thickness, carrying out mechanical cold working to a certain process dimension, determining gate arrangements, rolling reductions and front and back tensile forces for hot rolling and cold rolling, carrying out recrystallization annealing at 370-390 DEG C for 10-20 minutes, thereby manufacturing the 6000-series high-performance aluminum alloy plate for an automobile panel. Thus, the invention achieves the purposes of automobile weight reduction, energy conservation and emission reduction.

The invention relates to the technical field of food, and particularly discloses lime slices and a preparation method thereof. The preparation method comprises the following steps that a lime is cut into slices along the transverse diameter to obtain lime slices; the lime slices are prefrozen; the prefrozen lime slices are frozen and dried on the vacuum condition till the moisture of the lime slices is lower than 3%, and nitrogen-filled packing is performed. The lime slices obtained through the preparation method are good in appearance, color and fragrance and good in rehydration property, and Vc and naringin content in the lime slices can be well protected.

The invention is characterized in that uniform formula, process and equipment are used for industrial production of pefloxacin mesilate liposome medicine composition in the forms of injection and oral preparation by using a molecular dispersion method. The invention provides the mole ratio of the components in a formula of the pefloxacin mesilate liposome medicine composition. The invention also provides steps, methods and specific embodiments for preparing the pefloxacin mesilate liposome medicine composition in the forms of lyophilized injection and oral preparation. The pefloxacin mesilate liposome medicine composition can be used for resisting bacteria.