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709results about How to "Complete shape" patented technology

Method for preparing cobaltic-cobaltous oxide powder with octahedron shape

ActiveCN101293677ACrystallization intactMeet the requirements of lithium cobalt oxide for high-performance lithium-ion batteriesCobalt oxides/hydroxidesApparent densityOctahedron
The invention provides a preparation method of an electronic grade cobaltosic oxide powder which is shaped like an octahedron.The cobaltosic oxide powder has the complete appearance of the octahedron, the middle diameter (D50) of the powder is 0.5 to 5 Mum (the value can be adjusted by changing process parameters), the apparent density is more than 0.7g/cm<3>, and the tap density is more than 2.0g/cm<3>. The technological process is characterized in that the soluble cobalt salt solution, such as cobalt chloride and cobalt acetate, and ammonium bicarbonate solution are strongly stirred when being added to a reactor in the form of cocurrent flow at a definite speed, and the reaction temperature and PH value are strictly controlled, so the crystallization process is controlled. The obtained cobalt carbonate sediment is dried at a certain temperature after washing and filtration, and finally calcined at a certain temperature to get the ultimate cobaltosic oxide powder in the shape of an octahedron. The preparation method has the advantages that the cobaltosic oxide powder with the complete crystal form and in the form of the octahedron is prepared at atmospheric pressure, the specific surface area is high and the activity is high, etc., and besides the technique is simple, reliable and easy to industrialize.
Owner:GRIPM ADVANCED MATERIALS CO LTD

Canned abalones and production method thereof

The invention relates to canned abalones and a production method thereof. The canned abalones comprise 50 to 60 percent of abalone meat and 40 to 50 percent of flavoring soup blend. The manufacturing method comprises the following steps: removing mantles, horny jaw plates and melanin on peripheries of feet from the fresh and live abalones and washing the abalones; placing the abalones into 80 to 90 DEG C hot water and cooking the abalones for 3 to 8 minutes, taking meat, removing organs and rims and washing the meat; placing the meat in 0.1 to 0.5 percent solution of citric acid and performing color retention treatment at 75 to 85 DEG C for 20 to 30 minutes; soaking the meat in water for 2 to 2.5 hours; weighing pettitoes, lean pork, mutilated meat of old hens, pork large tripe, ginger, green onion, cooking wine and water to stew stock; mixing the stock, minor ingredients and pure water and heating the mixture to prepare the flavoring soup blend, wherein according to a standard of the weight of the pure water, the weight of the stock is 1 to 3 percent of that of the pure water and the minor ingredients comprise 0.6 to 1 percent of edible salt, 0.2 to 0.6 percent of sugar, 0.1 to 0.3 percent of abalone essence, 0.03 to 0.05 percent of iso-vitamin C sodium, 0.01 to 0.02 percent of citric acid, 0.03 to 0.06 percent of composite phosphate and 0.01 to 0.015 percent of nisin; and canning the abalone meat and the flavoring soup blend, exhausting air, and sealing and sterilizing the abalone meat and the flavoring soup blend. The canned abalones have rich nutrients, complete individuals, a yellow and bright color and a long shelf life. The manufacturing method of the canned abalones is reasonable in process and feasible in operation.
Owner:TAIXIANG GRP TECH DEV

Method for observing in-situ morphologies of nonmetallic inclusions in steel

InactiveCN102879412ATrue form completeThe real shape is fully presentedPreparing sample for investigationMaterial analysis by measuring secondary emissionSpectroscopyGlycerol
The invention relates to a method for observing the in-situ morphologies of the nonmetallic inclusions in steel. The method is characterized by comprising the following steps: a metallographic specimen is prepared and a surface to be observed is polished to be a plane; the superficial electrolytic corrosion is performed on an electrochemical polishing apparatus, an electrolyte is as follows: 5% (v/v) HCl (hydrogen chloride)+5%(v/v) glycerol+1% (v/v) citric acid methanol solution, and the setup parameters of the electrochemical polishing apparatus are as follows: the current density is 0.02A to 0.10A/cm<2>, the electrolytic temperature is from below 15 DEG C to below 5 DEG C, and the electrolytic time is 20 to 40s; a rubber rod is utilized for slightly wiping off the corrosive products on an electrochemical polishing surface of a test sample after the electrochemical polishing, the surface of the test sample is dried by a blow drier, and the nonmetallic inclusions are highlighted on an electrolytic etched surface of the test sample, so that the true morphologies of the nonmetallic inclusions with the different dimensions are completely displayed; and the morphologies of the nonmetallic inclusions are observed by a scanning electron microscope and an energy disperse spectroscopy. The method for observing in-situ morphologies of nonmetallic inclusions in steel provided by the invention has the advantages that the sample is prepared simply, the period is short, the analysis speed is fast, and the constituents and the varieties of the nonmetallic inclusions can be determined accurately by observing the three-dimensional morphologies and dimensions of the nonmetallic inclusions.
Owner:INNER MONGOLIA BAOTOU STEEL UNION

Process method for improving manufacturing accuracy of aluminum-alloy open-type integral impeller

InactiveCN104646961AAchieve process improvementImprove product qualityImpellerDynamic balance
The invention relates to a process method for improving the manufacturing accuracy of an aluminum-alloy open-type integral impeller. The method comprises the concrete steps of preparing materials, carrying out rough-turning on impeller blank shape, carrying out rough-turning on a process gripping head, carrying out heat treatment, carrying out artificial aging, carrying out semi-fine-turning on the process gripping head, carrying out semi-fine-turning on impeller shape, carrying out low-temperature treatment, carrying out five-axis-linkage-machining rough-milling, carrying out natural aging, carrying out five-axis-linkage-machining fine-milling, gripping, carrying out fine-turning on an axle hole, carrying out fine-turning on an impeller, gripping and carrying out dynamic balance. The impeller manufactured by adopting the process method provided by the invention has the characteristics that the shape is complete, the curved face is smooth and unhindered, blade curved faces and flow passage curved faces are low in deformation, and shown by the results of a fluorescent flaw detection, blade surfaces and front edges of the blades are flawless; during the dynamic balance of the integral impeller, mass reduction is relatively low, the qualified rate is high, and the qualified rate of excess-revolution tests of the integral impeller is greatly increased; the improvement of process for the series of integral impeller parts is realized, and good product quality, performance and design requirements are guaranteed; meanwhile, the stability of production quality is improved, and the reliability of products is improved.
Owner:SHANGHAI INST OF TECH

High-specific surface area nanometer mesoporous silicon carbide hollow ball and preparation method thereof

The invention relates to a high-specific surface area nanometer mesoporous silicon carbide hollow ball and a preparation method thereof. The preparation method comprises dropwisely adding different amounts of silica precursor tetraethoxysilane into water-anhydrous ethanol mixed solutions with different ratios so that the silica precursor tetraethoxysilane is hydrolyzed into silica solid nanospheres with different diameters, dispersing the silica solid nanospheres in distilled water with different volumes, carrying out thermal insulation for a certain time to obtain nanometer mesoporous silicon carbide hollow balls with different diameters are obtained, coating the inner and outer shells of the nanometer mesoporous silicon carbide hollow ball with an organic matter layer so that the organic matter is insert into the shell walls, carrying out carbonization, mixing the reaction product, magnesium powder and a metal salt to obtain a uniform mixture, and carrying out thermal insulation in an inert atmosphere for some hours to obtain nanometer mesoporous silicon carbide hollow balls with uniform structures and adjustable sizes. The preparation method has a low reaction temperature and a low cost. The obtained hollow silicon carbide has the advantages of uniform structure, adjustable sizes, superhigh specific surface area of 648m<2>/g and excellent mesoporous structure.
Owner:湖北朗驰新型材料有限公司

Method for preparing multi-shape controllable nano nikel-cobalt spinel oxide

The invention relates to a method for preparing multi-shape controllable nano nikel-cobalt spinel oxide. The method includes the steps that nickel nitrate and cobalt nitrate are dissolved in anhydrous ethanol according to the cobalt-nickel atom ratio to form a solution A; oleylamine is dispersed in an ethanol solution to form a solution B, and the solution B and the solution A are mixed to obtain a mixed solution; the mixed solution is fully and evenly stirred and moved into a dynamic reaction kettle, H2 is replaced in a sealed mode, pressure intensity of H2 is adjusted to 6-15 bar after replacement, and a steel cylinder air outlet valve is closed; the stirring speed of the dynamic reaction kettle is adjusted to 400 r/min, temperature is set to be 150 DEG C, and reaction is carried out for 10 h; a product is cleaned through ethanol and other nonpolar solvents respectively, centrifugal separation is carried out, and a sediment precursor is obtained through drying at the temperature of 60 DEG C; the temperature of the obtained sediment precursor rises in an air atmosphere at the speed of 10 DEG C/min, and the sediment precursor is heated to 200-400 DEG C and kept warm. According to the method, procedures are few, materials are easy to get and low in price, the procedures are safe, nikel-cobalt spinel oxide of different shapes can be obtained by changing a small condition in the procedures, and accordingly preparing of the controllable nano nikel-cobalt spinel oxide is achieved.
Owner:CHINESE RES ACAD OF ENVIRONMENTAL SCI

Preparation method for controllable hollow mesoporous silicon dioxide nanospheres

The invention provides a preparation method for controllable hollow mesoporous silicon dioxide nanospheres. The method comprises the following steps of: dissolving iron salt, acetic acid and polyvinylpyrrolidone in ethanol, and uniformly stirring and mixing, then transferring the solution into a polytetrafluoroethylene reaction kettle, and reacting while heating to obtain an iron oxide nanoparticle suspension; adding ethanol, deionized water and cetyl trimethyl ammonium bromide into the iron oxide nanoparticle suspension, adding alkali to adjust the pH value to be 7-12, slowly adding tetraethoxysilane in a stirring condition so as to for 12-72 hours, filtering, drying, and roasting at 400-600 DEG C, thus obtaining a mesoporous silicon dioxide-coated iron oxide nanomaterial with a core-shell structure; and completely soaking the obtained mesoporous silicon dioxide-coated iron oxide nanomaterial with the core-shell structure in a prepared acidic etching solution, dissolving an iron oxide used as a hard template, and washing with the deionized water and the ethanol, filtering and drying, thus obtaining the hollow mesoporous silicon dioxide nanospheres. The preparation method for the controllable hollow mesoporous silicon dioxide nanospheres disclosed by the invention has the advantages of being simple in synthesis process, moderate in operation condition, cheap in raw material and easy in acquisition of raw materials, and easy in enlargement and synthesis.
Owner:SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI

Forging technology of aviation engine blade based on nickel base superalloy

The invention discloses a forging technology of an aviation engine blade based on nickel base superalloy and belongs to the technical field of aviation forging. The forging technology comprises the following steps:feeding, coating a bar with a lubricating agent, upsetting and heating, upsetting, cleaning a forging stock, coating the forging stock with the lubricating agent, carrying out finish forging and heating, carrying out finish forging, carrying out side cutting, correcting heating, correcting, cleaning a forge piece, and carrying out thermal treatment and final inspection. The aviationengine blade forged through the forging technology disclosed by the invention is fine and uniform in crystalline grain, and the grain size is grade 9-10; the phenomena that nickel base superalloy is likely to have coarse grain and/or mixed crystal during the forging process are overcome, and the tensile strength can reach 200KSI or above; the forge piece of the blade is complete in outline and isfree of defects including crack, fold and the like, and the machining allowance, mechanical property and the metallographic structure meet the design requirements.A novel selection approach is provided for producing the nickel base superalloy based engine blade with fine and uniform crystalline grain and high tensile strength; and the blade forge piece product can meet the using requirements of the shape and the size of the aviation engine blade.
Owner:AECC AERO SCI & TECH CO LTD

Multi-curvature forming method for stainless steel cylinder

The invention discloses a multi-curvature forming method for a stainless steel cylinder. The method is characterized by comprising the following steps: performing scribing and blanking according to the developed length of the medium diameter of a cylinder to be wound; machining peripheral welding grooves of a plate; rolling-forming a first-curvature circular arc, namely reserving a straight section, not to be wound for the formation of a circular arc, with a width B of 200 to 600 mm at each of the two ends of the cylindrical plate, and bending and winding the middle part of the cylindrical plate into a large circular arc with a curvature radius R of more than or equal to 0.5 Phi to form the first-curvature circular arc of the cylinder; rolling-forming second-curvature circular arcs, namely rolling the parts between the roots of the straight sections with the widths B of 200 to 600 mm and the large circular arc into circular arcs with curvature radiuses r of 0.2 to 0.5 Phi to form second-curvature circular arcs; rolling transition parts between the second-curvature circular arcs and the first-curvature circular arc into smooth transition; performing rolling until the grooves 2 in the two ends of the straight sections get close to each other; performing longitudinal seam assembly and welding on the cylinder, placing the cylindrical body at a horizontal position, and welding longitudinal seams; performing roundness correction on the cylinder after welding.
Owner:SHANGHAI TONGHUA STAINLESS STEEL PRESSURE VESSEL ENG
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