388results about How to "Short manufacturing process" patented technology

The preparation process of nanometer aggregated zirconia powder for spraying includes: mixing nanometer zirconia powder stabilized with 20-60 nm granularity yttrium oxide and adhesive in the mass ratio of 95:5 to 98:2 and adding pure water of 1-1.3 times the mixture weight to compound slurry; spraying at 110-300 deg.c to form micron level aggregated powder; and final plasma nodulizing or sintering to form compact powder of 40-90 micron granularity and with the nanometer crystal structure maintained. The obtained powder may meet the technological requirement of plasma spraying or flame spraying. The technological process is simple, great in output, safe, reliable, low in cost and suitable for continuous industrial production.

The invention discloses a preparation method of battery-grade lithium carbonate. The preparation method comprises the following steps: taking a lithium adsorption and desorption eluent as a raw material, performing primary and secondary monovalent ion selective electrodialysis treatment, concentrating and enriching a lithium ion by utilizing the monovalent ion selectivity of a monovalent ion selective cation membrane and a monovalent ion selective anion membrane, and intercepting magnesium ions, sulfate ions and borate ions, thereby realizing efficient separation of lithium and magnesium as well as sulfate and borate ions and other impurity ions and lithium concentration and obtaining a lithium-rich concentrated solution with a lithium content of 10-20 g/L and a ratio of magnesium to lithium of 0.1-1; obtaining the battery-grade lithium carbonate through the steps of deep calcium and magnesium removal, heavy lithium conversion, filtering and washing, drying, cooling and the like. According to the preparation method disclosed by the invention, the preparation process of the battery-grade lithium carbonate is greatly shortened, the process continuity is obviously improved, the cost is reduced, and the bottleneck problem of magnesium removal and concentration by using the salt lake lithium adsorption and desorption eluent with high magnesium-lithium ratio is solved.

The invention relates to a method for preparing an Mg-Li alloy by vacuum synchronous thermal reduction, belonging to the novel technical field of preparing magnesium alloy materials. The process course comprises the following steps of: preparing reactants according to stoichiometry of reduction reaction; pulverizing solid reactants and uniformly mixing; pressing the reactant powder into blocks and placing the blocks into a reduction tank, and carrying out thermal reduction reaction at the vacuum degree of 1-20Pa and the temperature of 950-1,500 DEG C; collecting alloy steam generated by reaction; and condensing the alloy steam to obtain an Mg-Li alloy in a condensed state. In the invention, the oxides of metals Mg and Li or a precursor of the oxides are utilized as raw materials, the synchronous reduction of the metals Mg and Li is realized through vacuum thermal reduction to prepare the Mg-Li alloy directly. The alloy preparation process has short route, wide sources of the raw materials, high material utilization rate, favorable economy and manufacturability, high efficiency and energy saving.

The invention discloses a preparation method of powder metallurgy tool and mould steel. The preparation method combines the advantages of vacuum induction melting, inert gas atomized powdering process and powder metallurgy technology, and comprises the steps of utilizing gas atomized powdering equipment to melt tool and mould steel, preparing high-quality tool and mould steel powder with little porosity powder, little nonmetal inclusion and a small size through an optimally designed negative pressure powdering process, and preparing high-quality powder metallurgy tool and mould steel ingot through further thermal dynamic degassing, sheathing and hot isostatic pressing.

The invention relates to a method for preparing submicron lamellar magnesium hydroxide by intensifying alkali, comprising the following steps of: mixing magnesium oxide, the alkali, a dispersing agent and water into slurry according to a certain proportion; carrying out mechanical and chemical treatment to prepare the slurry used for crystallization; carrying out hydrothermal crystallization; carrying out solid-liquid separation on a product, and washing and drying a solid to obtain submicron lamellar magnesium hydroxide powder. In the invention, filter liquor can be recycled; the hydrolysis of the magnesium oxide and the nucleation of the magnesium hydroxide are promoted by utilizing mechanical and chemical action and alkali intensifying action, the shape and the growth of a magnesium hydroxide crystal is regulated and controlled through the hydrothermal crystallization, and no alkali is consumed in the process; as the magnesium oxide is used as a raw material and an alkalizing mechanical and chemical treatment-hydrothermal crystallization process is adopted, the preparation process flow of the submicron high-dispersion lamellar magnesium hydroxide is shortened, the consumption of the alkali used for a process for preparing the magnesium hydroxide by precipitating soluble magnesium salt and the cost input are decreased, and the hydrothermal crystallization process does not generate any side product like chemical salt and is a clean production process; and in addition, the obtained submicron lamellar magnesium hydroxide is widely used in the fields of flame-retardant and catalytic carriers and other functional materials.

The invention provides a negative electrode active material for a lithium-ion/sodium-ion secondary battery, a negative electrode and a battery, belonging to the technical field of electrochemistry and batteries. The negative electrode active material comprises a phosphorus-germanium compound, or/and a first complex formed by the phosphorus-germanium compound and elementary P or/and elementary Ge, or/and a second complex formed by the phosphorus-germanium compound and conductive components, or/and a third complex formed by the first complex and conductive components. The negative electrode provided by the invention comprises the negative electrode active material. The negative electrode has the advantages of high specific capacity, high initial Coulomb efficiency, small charge-discharge voltage platform difference and good high-current charge-discharge performance.

The invention discloses a preparation method of an oxide surface layer shell for titanium alloy precision casting. The preparation method comprises the steps of preparation of binders, preparation of surface layer powdery material, preparation of surface layer coating, preparation of a surface layer shell, shell dewaxing, shell roasting and the like; the preparation method has the beneficial effects that: the used raw material has low price and is easily available, the traditional process is improved, the using amounts of zirconium oxide and yttrium oxide are greatly reduced, the process is simplified, the preparation flow is shortened, and the labor and raw material costs are reduced; adhesive adopts silicon sol and zirconium acetate as main raw materials and is added with n-caprylic alcohol and polyvinyl alcohol, so that the surface layer coating has good coating property, can be uniformly coated on a wax mold and has good compactness; the adhesive is added with zirconium oxide fireproofing ingredient, therefore, the surface layer shell is capable of resisting high temperature; steam dewaxing is adopted to achieve the effect of no environment pollution; the prepared surface layer shell has no influence on human health, has wide application range, small interface reaction layer with thickness 0.018-0.02mm, high precision and excellent performance and is easy to realize post-finishing.

The invention discloses a switch element, the preparation method of the switch element, array substrate and display apparatus. The switch element comprises a substrate; a first film transistor arranged on the substrate; and a second film transistor arranged on the first film transistor. The first film transistor consists of a first electrode and a second electrode. The first film transistor and the second film transistor share the first electrode and the second electrode. According to the switch element of the invention, two film transistors are in parallel arrangement with one above the other. This design increases the open-state current of the switch element while reducing the size of the switch element. In addition, as the two film transistors share the same source electrode layer and the drain electrode layer, the preparation technology for the switch element is simplified and the cost is reduced.

The invention discloses a method for preparing a cathode material of a lithium ion battery. The method comprises the following steps: 1, separating a cathode material on a cathode sheet of a waste and old lithium ion battery or a cathode material in lithium ion battery production scraps; and 2, determining the mass ratio of useful elements in the separated cathode material, calculating deficient elements of the separated cathode material according to the mass ratio of the elements of raw materials for preparing the cathode material of the lithium ion battery, adding compounds of the deficient elements in order to reach the stoichiometric ratio of a target product, and preparing the cathode material of the lithium ion battery. The method can recycle cathode materials comprising lithium cobaltate, nickel cobalt lithium manganate and lithium manganate used in waste and old lithium ions and cathode material scraps comprising lithium cobaltate, nickel cobalt lithium manganate and lithium manganate generated in the production of the lithium ion battery according to the waste recycling situation.

Disclosed is a process for preparing short process fine crystalline superplasticity materials, which is characterized in that: cast alloy is used as a starting material for carrying out the agitation and friction processing after the homogenization heat treatment, and a bulky, loose and uneven cast structure is changed into an even and compact fine crystalline superplasticity structure.

The invention discloses single functionalized polyethylene glycol with a nitrogen-atom branching center, a preparation method and a biologically-relevant substance thereof. General formula of the single functionalized polyethylene glycol with the nitrogen-atom branching center is as shown in the formula (1), and general formula of the polyethylene glycol-modified biologically-relevant substance is as shown in the formula (2), wherein X1 and X2 are an alkyl group having 1-20 carbon atoms; n1, n2 and n3 are an integer of 1-1000; L1, L2 and L3 are a linking group which stably exists under the illumination, enzyme, acidic or alkaline condition; R is a functional group; D is the biologically-relevant substance; Z is a linking group; and L4 is residue obtained after a reaction between a functional group and the biologically-relevant substance. The branched polyethylene glycol with the nitrogen-atom center enriches varieties of branched polyethylene glycol, is easy to interact with a substrate, is more beneficial to protection of the substrate by polyethylene glycol, improves in vivo status of the substrate more effectively, and has a wider prospect.

The invention discloses a method for synthesizing in-situ formed ceramic particle reinforced iron-aluminum-based composites by laser combustion, belonging to the technical field of materials. The in-situ formed ceramic particle reinforced iron-aluminum-based composites are prepared by the following steps of: putting tungsten ore powder, iron powder, aluminum powder and carbon powder in a ball mill for milling to obtain a mixed powder material; and compressing the mixed powder material into a pressed compact, transmitting a high-energy laser beam by employing a CO2 laser processing machine to ignite the surface of the pressed compact and trigger self-propagating high temperature synthesis of the pressed compact. By the invention, two ceramic particle reinforced phases are simultaneously formed on one substrate, which shortens the preparation process of the composites, lowers material manufacture cost and facilitates large-scale production and application.

The present invention relates to fusion casting-in-site synthesis process of preparing alpha-Al2O3 grain reinforced copper base composite material, and belongs to the field of metal base composite material. The technological process includes: compounding materials based on reaction formula 2Al+3CuO-->3Cu+Al2O3; mixing materials Al and CuO in a material mixing machine and forming; heating matrix material Cu of over 99.0 % purity in MF inducing furnace to the temperature of 50-150 deg.c over the smelting point of Cu; pressing the fabricated blocks on 1-10 wt% of the melt into the melt and maintaining; casting to obtain in-site reacted alpha-Al2O3 grain reinforced copper base composite material. The advantages include shortened technological process, low manufacture cost and wide application as high strength and high conductivity electronic and electric material.

The invention discloses a method for preparing heat dipping tin of a plastic sealed axial diode, which comprises the following steps: placing the plastic sealed axial diode in an adapter plate; placing a first heat dipping tin positioning fixture below the adapter plate, ensuring that a lower substrate of the first heat dipping tin positioning fixture is tightly attached to a bottom plate of the adapter plate, and tightly clamping a first electrode of the diode by using the first heat dipping tin positioning fixture; removing the adapter plate, placing the first heat dipping tin positioning fixture in a guide rail of a tin dipping machine, and starting the tin dipping machine to perform dip soldering on a second electrode of the diode; tightly clamping the second electrode of the plastic sealed axial diode by a second heat dipping tin positioning fixture through the adapter plate; placing the second heat dipping tin positioning fixture in the guide rail of the tin dipping machine, and performing dip soldering on the first electrode of the diode; and finally, cleaning and drying the plastic sealed axial diode. The plastic sealed diode heat dipping tin positioning fixture with simple structure, convenient assembly and disassembly and reliable positioning is adopted, so that the processing speed of the heat dipping tin is improved, the material backlog of the procedure is reduced, and the production line is facilitated.

The invention relates to a nanostructured cerium-doped lanthanum zirconate spherical powder for thermal spraying and a preparation method thereof. The nanostructured cerium-doped lanthanum zirconate spherical powder for thermal spraying is characterized in that the nanostructured cerium-doped lanthanum zirconate spherical powder for thermal spraying is uniform spherical powder, the grain size of the spherical powder is 20Mu m to 90Mu m, nanostructured cerium-doped lanthanum zirconate grains are agglomerated to form the nanostructured cerium-doped lanthanum zirconate spherical powder for thermal spraying, wherein the nanostructured cerium-doped lanthanum zirconate grains are of a single-phase pyrochlore structure, the grain size is 30nm to 250nm, grain size distribution is uniform and controllable, the nanostructured cerium-doped lanthanum zirconate grains are spherical, and are obtained by doping the Zr site with Ce, the chemical formula is La2Zr2-xCexO7, wherein x is greater than or equal to 0.1 and less than or equal to 0.5. Since the nanostructured cerium-doped lanthanum zirconate spherical powder for thermal spraying is uniform spherical powder, the flowability is good, the thermal conductivity is low, the linear thermal expansion coefficient is great, the high-temperature stability is good, and the nanostructured cerium-doped lanthanum zirconate spherical powder for thermal spraying is particularly suitable for the preparation of various high temperature-resistant thermal barrier coatings or high temperature-resistant wear-resistant, corrosion-resistant coatings by plasma spraying, flame spraying, electric arc spraying and other thermal spraying processes.