876results about How to "Process is easy to control" patented technology

The invention discloses a molecular sieve based catalyst, a preparation method and an application thereof in crylic acid preparation by lactic acid dehydration. The method comprises the following steps: processing the ZSM-5 molecular sieve in aqueous alkali, or adopting an impregnation method to support phosphate, drying, roasting and finally obtaining the modified molecular sieve based catalyst. The catalyst realizes the reaction of crylic acid preparation by lactic acid dehydration in low temperature and has the advantages of high lactic acid conversion rate and crylic acid selectivity, and long-life of catalyst, the conversion rate of lactic acid dehydration reaction is 100%, and crylic acid selectivity can reach as high as 83.9%, thus having good industrial application prospect.

The invention discloses a lithium ion battery conductive additive and a preparation method thereof, and solves the technical problems of improving the conductive performance and cycle life of anode and cathode materials of a lithium ion battery. The lithium ion battery conductive additive is graphene, is black powder with grain size distribution of between 10 nanometers and 100 microns, and is a carbonaceous material consisting of single or 1,000 parallel or approximately parallel graphene lamellae. The preparation method comprises oxidization and stripping reduction. Compared with the prior art, the additive has higher electric conductivity; when the additive is applied to the electrode material, the performance of the conventional battery can be greatly improved only by a little amount; the material serving as the conductive additive has good conductive performance, is easy for dispersion, and can effectively enhance the conductive performance and the magnification charging and discharging performance of the electrode material of the lithium ion battery and prolong the cycle life; and the preparation method has low requirements for raw materials and equipment, is easy to control the process, and is suitable for industrialized production.

The invention is concerned with simulation diamond end face polishing-grinding machining method and the expert polishing-grinding machining. Set stuff and put molding plastics-absorption tray on fixture tray and make the concave face of plastics-absorption tray upside, and the simulation diamond adsorbs on the convexity of the bottom to plastics-absorption tray. Set plastics-absorption tray on the polishing-grinding machining and mill the tine end of simulation diamond on calm millstone. The polishing-grinding machining relates rack with a level millstone at its middle, and there are two level trays. They are centrosymmetric to the axis of millstone on top of millstone and have plastics-absorption tray on them. There is up and down equipment for tray on top of level tray which connecting with two turning axes on two sides of millstone with level rack, and the other end of turning axis has running equipment of turning axis. It has large machining amount of each time, high produce efficiency, good ratio to excellent stuff, long work time, easy operation without waste of material.

A niobic acid potassium sodium system lead-free piezoelectric ceramic and its production are disclosed. The components of the niobic acid potassium sodium system lead-free piezoelectric ceramic are (1-n)KxNa1-xNbO3.nMH, it is prepared by SPS process. The production is carried out by grinding mixing raw materials, calcining synthesizing niobate, using SPS process for the obtained powdery material, annealing treating under oxygen atmosphere, and obtaining piezoelectric/ferroelectric ceramic materials. Its advantages include lead-free composition, good piezoelectric performance, low calcining temperature, short calcining time and fine tissue.

The invention belongs to a flexible CIGS thin-film solar cell and a process for preparing an absorption layer thereof, the flexible CIGS thin-film solar cell is a multi-layer film structure, which comprises an substrate, a bottom electrode, an absorption layer, a buffer layer, a window layer, an anti-reflecting film and an upper electrode, and the flexible CIGS thin-film solar cell is characterized in that the substrate is made of flexible metals or polyimide. The process for preparing the adsorption layer of the flexible CIGS thin-film solar cell is characterized in that the substrate is made of flexible metals or polyimide, the bottom electrode Mo of the thickness of 0.5-1.5 mu m is deposited by magnetron sputtering, a metal prefabricating layer is prepared on a Mo thin-film, and is in vacuum seal to be placed in a furnace to heat, the temperature of the area of a solid selenium source is controlled between 180-300 DEG C to perform selenizing treatment, thereby enabling the metal prefabricating layer to be transformed into a semiconductor thin-film. Through performing selenizing or vulcanizing under saturation vapor pressure of selenium or sulfur in a vacuum seal silica tube, controllable repeatability of the technique process is fine, use quantity of selenium or sulfur is reduced, besides, the process is controllable and the equipment is simple.

The invention provides a preparation method of a mono-dispersed gelatin embolic microsphere with a precisely-controlled particle size. In the provided method, micro water-in-oil liquid drops are formed in a micro channel reactor at first through a micro-fluidic liquid drop control technology, then a crosslinking agent and a gelatin water solution are taken as the dispersing phase and introduced into the water-in-oil system, and then the mixture is directly cured to form microspheres. By adjusting the flowing speeds of the continuous phase and the dispersing phase, and the flowing speeds of two dispersing phases, the particle size and sphericility can be precisely controlled. The preparation technology is simple and rapid, and the process is controllable. The prepared gelatin microsphere can be used as an embolic agent or an antitumor drug carrier, and can also be applied to cell culture.

The invention discloses a particle reinforced metal-based composite material product (rods, wires, sheets or belts, or parts) which is obtained, based on the severe plastic deformation theory of material, by the step of performing severe plastic/accumulated deformation processing on a particle reinforced metal-based composite material so that second phase particles agglomerated in a metallic matrix are uniformly distributed (dispersed) in the matrix, and then carrying out subsequent processing, thereby enhancing the quality and the yield of the particle reinforced composite material and lowering the processing cost of the material, and thus a particle reinforced metal-based composite material having the characteristic of the uniformly distributed second phase particles and excellent performance is obtained.

The invention relates to the field of new materials, and in particular to a preparation method of graphene, which is the method for preparing a graphene energy storing material through electrochemical cathodic disbanding. The method comprises steps as follows: getting noble electrode as anode, high-purity graphite as cathode, a quaternary ammonium salt organic solvent as electrolyte, and voltage adjustable direct current power as the power supply; carrying out high cathodic disbanding under a constant voltage of -5 to -100V; inserting the solvated quaternary ammonium salt into laminated graphite under an effect of a high cathode voltage so as to generate expansion on a surface of the graphite electrode in a single layer or a plurality of layers; and decomposing the solvent to obtain gas under an electric potential effect of the high cathode, so as to further strip the graphite to obtain the graphene. The method is carried out under a direct current stabilized power supply without other special equipment; the method for preparing the graphene is simple, convenient and easy to carry, a process is easy to control, cost is low, no pollution is generated, and convenience is provided for industrial popularization and application; and prepared graphene can be widely applied to fields such as an energy storage field, an energy conversion field, an electronic device field and a biosensing field.

Production of Barbary Wolfberry Fruit polysaccharide is carried out by taking Barbary Wolfberry Fruit as raw materials, soaking, crushing, extracting, enzyme hydrolysis reacting, column chromatography acting, depositing by alcohol, dealcoholizing and drying. It's cheap and simple, has short production period and better purity.

The invention belongs to the technical field of heat insulating material preparation, and particularly relates to a preparation method of a corundum/mullite light-weight heat insulating material, which comprises the following steps: by using ceramic powder, silica sol, deionized water, ammonia water and dryness-control chemical additive as initial raw materials, carrying out ball milling to prepare a ceramic slurry; adding a foaming agent into the ceramic slurry, and foaming in a mechanical stirring mode to obtain a foam slurry; adding an NH4Cl solution into the foam slurry while stirring, injecting the uniformly stirred foam slurry into a mold, and quickly curing to form the foam slurry; and drying the demolded blank, and firing to obtain the corundum/mullite light-weight heat insulating material. The invention is characterized in that the gelation reaction of the silica sol is utilized to implement curing and formation of the foam slurry; meanwhile, the volume expansion generated by mullitization in the firing process is utilized to avoid sample cracking due to excessive sintering shrinkage; and in addition, the raw materials are nontoxic and cheap, and the preparation process is simple to control and suitable for industrial production.

The invention relates to a method for recovering zirconia and yttria from the yttria-stabilized zirconia solid solution waste, which comprises the following steps: mixing the solid solution waste powder, sulfate and salt; acidizing and calcining at 200 to 320 DEG C; leaching the acidizing water and/or mother liquor under self-heating conditions; concentrating the leaching solution to leach zirconium sulfate; dissolving the zirconium sulfate in the water and purifying; neutralizing the zirconium hydroxide with alkali and precipitating; calcining the zirconium hydroxide to obtain zirconia; precipitating zirconium mother liquor to produce by-product of ammonium sulfate; neutralizing yttrium rich mother liquor and precipitating to obtain yttrium; dissolving yttrium rich residue with acid and purifying; precipitating oxalate to obtain yttrium oxalate; calcining to obtain the yttria. The method has the advantages of effectively separating the yttria from the zirconia in stable zirconia solid solution waste with optional yttrium ion under low temperature condition, changing the zirconia solid solution waste into valuables and utilizing the resources.

The invention relates to a silicon detector structure with a wide spectral response range, which comprises an n-type silicon substrate, a silicon dioxide medium masking layer, a p-type doping layer, a front surface contact electrode, an antireflection film layer, a broad-spectrum absorbing black silicon layer, a medium passivating layer and a back surface contact electrode, wherein a circular groove is arranged on the surface of the n-type silicon substrate; the silicon dioxide medium masking layer is formed around the circular groove on the surface of the n-type silicon substrate, and the middle of the silicon dioxide medium masking layer is an annular structure; the p-type doping layer is arranged in the circular groove of the n-type silicon substrate; the front surface contact electrode is produced on the inner wall of the annular structure of the silicon dioxide medium masking layer and covers the partial edge of the surface of the annular structure to form an annular structure; the antireflection film layer is produced in the annular structure of the front surface contact electrode and covers the surface of the p-type doping layer; the broad-spectrum absorbing black silicon layer is produced on the back surface of the n-type silicon substrate; the medium passivating layer is point-type and is formed on the surface of the broad-spectrum absorbing black silicon layer; and the back surface contact electrode is produced on the surface of the broad-spectrum absorbing black silicon layer and covers the point-type medium passivating layer.

The invention discloses a method for preparing a molybdenum trioxide material with an orthorhombic phase single crystal nano belt structure. The method comprises the following steps: preparing molybdenum acid sol from ammonium heptamolybdate acidified by nitric acid; adding a template agent cetyltrimethylammonium bromide; and carrying out hydrothermal reaction, filtering, washing and drying so as to obtain the orthorhombic phase single crystal nano belt. In the method for preparing the molybdenum trioxide material with the orthorhombic phase single crystal nano belt structure, the ammonium heptamolybdate and the nitric acid are used as raw materials, the cetyltrimethylammonium bromide is used as the template agent, the acidification procedure is simple, process is easy to control, the reaction temperature is low, and the width and thickness of the product are small; the nano belt is of a single crystal structure and has good topography; and the preparation process is short in process flow period, the yield is high, the preparation equipment is simple and the cost is low. By using the method, the molybdenum trioxide material with the orthorhombic phase single crystal nano belt structure, which has width of 50-100nm, length of 1-10 mu m and thickness of 30-60nm, is obtained, and the powder grain size of the molybdenum trioxide nano belt is even.

The invention relates to a method for preparing a medical quick liquid-absorbing foam material. The method comprises the steps of well mixing polyvinyl alcohol aqueous solution, aldehyde and a pore-forming agent, adding acid to the mixture, continuing to stir the mixture, pouring the mixed solution into a die, curing and molding the mixed solution, washing and drying the obtained product and obtaining a target object. The material has abundant mutually communicated opening structures through a method of using mechanical foaming together with the pore-forming agent. The prepared material is good in biological compatibility and excellent in hydrophilcity, has the liquid-absorbing capability much higher than common cotton yarn and paper, has the capability of quickly absorbing a large amount of distilled water, physiological saline and urine, turns into soft tenacious elastic sponge after absorbing liquid, is resistant to heat and ultraviolet radiation, and can be disinfected in a plurality of ways. The prepared material is a rigid foam material in a dry state, is a spongy material in a wet state, has the apparent density of between 0.04 and 0.09 g/cm and the liquid-absorbing ratio of between 1,800 and 2,800 percent, and can be applied to medical operations.

A steel with high low-temp toughness (600 MPa), weldability and the resistance to atmosphere corrosion contains C (0.05-0.09 wt.%), Si (0.45-0.7), Mn (2.10-3), P (0-0.02), S (0-0.01), Ti (0.005-0.009), Nb (0.095-0.19), Ni (0.1-0.19), Cu (0.45-0.65), Cr (0.75-1.5), Ca (0-0.02) and Fe (rest). It features that Cr+Ni+Cu is 0.70-2.50 and content of Nb is greater than that of 4Ti+3Ca.

The invention relates to a manufacturing method of a hollow turbine blade provided with an impact hole structure. The method comprises the steps of firstly, preparing a plurality of aluminum oxide ceramic mold cores corresponding to a plurality of main cooling channels in the hollow turbine blade; after that, preparing an impact hole core between every two adjacent aluminum oxide ceramic mold cores, wherein a molybdenum wire is arranged in the center of each impact hole core, and a ceramic layer is arranged on the surface of each impact hole core; assembling the impact hole cores and the plurality of aluminum oxide ceramic mold cores in a combining way, putting the assembled product into a wax mould of the hollow turbine blade; injecting wax into a mold cavity of the wax mould, separating the wax mould after the wax is solidified, and spraying ceramic slurry onto the surface of a wax model to prepare a ceramic mold shell; melting the wax, and carrying out calcination to prepare a ceramic casting mould with a structure comprising the mold cores and the mold shell; and pouring high-temperature molten metal into the ceramic casting mould, and removing the ceramic casting mould after the molten metal is solidified to obtain the hollow turbine blade which comprises the plurality of main cooling channels and the impact hole structure. The manufacturing method mainly solves the problem that the impact hole cores are difficult to mold, are not enough in strength or low in core forming rate in an investment casting process.

The invention relates to a method for preparing ferroferric oxide nano-piece through a microwave method, which belongs to the field of preparation of nano-material through a wet chemical method. The method comprises the following steps of: preparing a ferric salt solution by using ethylene glycol by using a soluble trivalent ferric salt as a raw material , adding the sodium acetate and a surfactant in the ferric salt solution, evenly stirring, and irradiating by using microwave to generate ferroferric oxide, filtering and washing the product, drying the product at a constant temperature in air to obtain the ferroferric oxide nano-piece material. The ferroferric oxide nano-piece material synthesized by the method has a thickness of 100nm below as well as the length and width of 1-10microns. The invention has the advantages of high purity of the prepared ferroferric oxide nano-piece, simple synthetic line, short period of microwave reaction of only tens of minute and easy control of the whole process, meets the demands of practical production, and has god application prospect in the fields of catalysis, biological medicine, energy and environment and the like.

The invention belongs to the technical field of plant drugs, and particularly relates to a method for extracting danshensu with high-purity from Salvia miltiorrhiza, which comprises the following steps: extracting solution is extracted from the Salvia miltiorrhiza medicine material containing danshensu by using a hot dripping method; the pH value of the extracting solution is adjusted by acid, the impurities are cleared and concentrated in a pressure reducing way; the eluting is carried out by using a macro porous adsorption resin and the danshensu is enriched; then concentration is carried out at low temperature, freezing and drying are carried out into solid; finally, ethanol is used for heating and dissolving, and the filter liquor is concentrated at low temperature after being filtered and precipitated, a crystallization is precipitated and the danshensu is obtained and the purity of the danshensu is more than 90 percent. The method for extracting danshensu with high-purity from Salvia miltiorrhiza has simple technology, high extracting efficiency, little pollution and low production cost, which can be controlled and is suitable for mass production.

The invention discloses a method for using by-products of maleic anhydride to prepare BDO or succinic acid diester, wherein, the by-products comprise at least one of wastewater, waste residues and maleic anhydride residues, a preparation method thereof includes the major steps of esterification, distillation, reduction, etc., thereby obtaining a BDO or succinic acid diester product. The method can fully recycle maleic anhydride, fumaric acid, maleic acid, succinic acid, etc. in the by-products such as wastewater, waste residues and maleic anhydride residues in the production process of maleic anhydride, thereby obtaining products such as chemical intermediate BDO or succinic acid diester with great market demands, and maximally reducing the discharge of wastes; and the preparation method has advantages of simple and controllable technical process and rather low cost.

The present invention relates to the technical field of lactobacillus coating, specifically relates to a production process of feeding lactobacillus microcapsules and microcapsules, application and a premix thereof. Trehalose and lactose which can rapidly form vitrification protection state at a low temperature are used, sodium glutamate, manganese sulfate, glycerin, and polyvinyl pyrrolidone are used as main components for a wall material, special ultrasonic wave spray drying equipment is used, an ultrasonic spray nozzle is used for atomization, vacuum and a protective gas such as nitrogen are used for drying at room temperature, thus the effects of low temperature of low temperature freeze-drying and high temperature of high temperature spray drying on lactobacillus activity are prevented, and survival rate of the bacteria can reach more than 90%. The process of the invention achieves that lactobacillus is dried at room temperature, the preparation process is easy to control, the obtained product has a long storage period, and the storage time of the product can be significantly extended.

The invention discloses a lithium ion battery and a preparation method of the lithium ion battery. A positive electrode active material is made of lithium cobaltate or lithium cobaltate doped with a part of nickel manganese lithium manganate ternary materials, a negative electrode active material is made of natural modified graphite wrapped by carbon, electrolyte adopts mixed solvent of diethyl carbonate (DEC), ethyl cellulose (EC) and poly carbonate (PC), vinylene carbonate and propylene sulfite annexing agents are added, solid electrolyte interphase (SEI) film is formed preferentially, joint insertion of the organic solvent is restrained, and high temperature performance is excellent. A battery system obviously improves high temperature storage property of the battery on the premise of meeting safety performance, high and low temperature discharge performance and circulation performance of a conventional lithium ion battery. The preparation method is simple, manufacture procedures are easy to control, and the lithium ion battery is easy to popularize and apply.

The invention discloses a porous silicon material, and a preparation method and an application thereof. The porous silicon material is mainly prepared by mechanical milling and acid etching of metallurgical iron-silicon alloy as a raw material; the dimension of the porous silicon material is in micron/submicron level; the porous silicon material has a diamond structure, belongs to an Fd-3m (227) space group, and has a reaction phase which can react with lithium (Li); a large number of hierarchical porous structures with different dimensions are evenly distributed in the surface and the inside of the porous silicon material; the porous silicon material can be used as a lithium ion battery anode active material, and shows the characteristics of high (first) coulombic efficiency, high capacity, excellent cycling stability and the like when applied to a lithium ion battery; meanwhile, the preparation technology of the porous silicon material is simple, and can be carried out only by conventional equipment; the used raw materials are cheap and available; the technological process is easy to control; and the porous silicon material is good in repeatability, high in productivity, stable in product quality and suitable for large-scale production.

The invention discloses a metallic screw and a manufacturing method for the same. A chrome and molybdenum-containing alloy steel bar is taken as a screw mandrel (1) of the screw. A multi-element boride-based metal ceramic layer (2) is coated on the periphery of the screw mandrel (1) in a sintering way, and is a Mo2FeB2-Fe-based metal ceramic layer, a Mo2NiB2-Ni-based metal ceramic layer or a WCoB-Co-based metal ceramic layer. The manufacturing method comprises the following steps of: placing the screw mandrel into a sheath, and filling proportioned powdery raw materials into a gap between the screw mandrel and the sheath; placing the whole sheath into a closed container, and vacuumizing the closed container; and sintering the sheath in the closed container, and finely machining the multi-element boride-based metal ceramic layer to obtain the metallic screw. The multi-element boride-based superhard bimetallic or metallic screw has the advantages of low comprehensive cost, simple manufacturing process, long service life, suitability for industrialization, and the like, and can be used for replacing the conventional widely-used screws subjected to nitriding, spray welding, casting and the like.

The invention relates to a method for preparing a gradient nano-structure on the surface of a metal material. According to the method, a processed plate workpiece is placed inside a cooling tank; a fixture is adopted to tightly press the workpiece; the lower end surface of a tool head is placed on the surface of the workpiece, and is pressed into the surface of the workpiece; a cooling medium is poured into the cooling tank, wherein the workpiece is submerged by the cooling medium; after a temperature of the workpiece reaches a temperature of the cooling medium, the tool head rotates at a certain speed while a work table horizontally moves at a certain speed to drive the workpiece to horizontally move at a certain speed so as to complete a shear deformation treatment by the high hardness end surface of the tool head during a high speed rotation process, wherein high strain rate and large strain are generated to the surface of the workpiece with the shear deformation treatment, and a plurality of deformation treatments are performed on the surface of the workpiece by using the high-speed shear deformation technology. Compared with the method in the prior art, the method of the present invention has advantages of high processing efficiency, low equipment loss, low manufacturing cost, simple process, strong applicability, and the like.