174results about How to "High batch stability" patented technology

The invention discloses a preparation method of titanium alloy bars. The finished titanium alloy bars are prepared through the following steps: heating prepared TC4-DT titanium alloy ingots to 1150 to 1200 DEG C; cogging and forging a beta phase zone of the ingots with a fast forging press; heating forging stocks to Tbeta-50 to Tbeta-20 DEG C through a resistance furnace; carrying out repeated upsetting and extension forging by the fast forging press; forging forged stocks to required dimensions at a forging temperature of Tbeta-70 to Tbeta-40 DEG C to obtain titanium alloy bars with uniform tissues; and carrying out duplex annealing on the obtained titanium alloy bars with the uniform tissues. The preparation method has the advantages of convenient operation, strong controllable technology, high stability of batches of prepared bars, and good repeatability. The titanium alloy bars prepared through the method of the present invention has the advantages of strong plasticity, qualified macrostructure, high strength and fracture toughness, and low fatigue crack growth rate.

The invention provides a preparation method of a TC4ELI titanium alloy bar. The preparation method comprises the following steps of: (1) carrying out cogging forging; (2) carrying out upsetting forging; (3) carrying out precise forging; (4) carrying out shearing, straightening and annealing treatment in sequence, thereby obtaining the cylindrical TC4ELI titanium alloy bar with the cross-section diameter of 15mm-90mm. The invention also provides a preparation method of the TC4ELI titanium alloy bar. The preparation method comprises the following steps of: (1) carrying out cogging forging; (2) carrying out upsetting forging; (3) carrying out precise forging; (4) rolling; (5) carrying out shearing, straightening and annealing treatment in sequence, thereby obtaining the cylindrical TC4ELI titanium alloy bar with the cross-section diameter of 8mm-15mm. The preparation method is simple in process, strong in repeatability and suitable for large-scale industrial production; the TC4ELI titanium alloy bar prepared by adopting the preparation method is uniform and fine in structure, high in microscopic structure level and excellent in mechanical property.

The invention discloses a preparation method for an inverted LED white-light chip of chip scale package, and the method comprises the following steps: temporarily fixing an UV solidifying adhesive tape (2-1) on the upper surface of a die bonding positioning light cover (1); setting flip chips (3) on the upper surface of the UV solidified adhesive tape (2-1) according to the position of the die bonding positioning light cover (1); employing a fluorescent glue film (4) to cover the flip chips (3); carrying out vacuumizing and heating, and enabling the fluorescent glue film (4) to be solidified and packaged on the flip chips (3); carrying out cutting along gaps among the all packaged flip chips (3); removing the die bonding positioning light cover (1); carrying out UV irradiation and enabling the UV solidified adhesive tape (2-1) to be solidified, and obtaining the inverted LED white-light chip (5) of chip scale package. The method simplifies the technological flow, avoids glue mixing and dispensing in the original technology, improves the production efficiency and yield, and greatly reduces the production cost. The method completely avoids the sinking of phosphor, enables the batch stability of the inverted LED white-light chips (5) to be high, and enabling the color temperature of the inverted LED white-light chips (5) to be consistent.

The invention relates to a direct-throwing type plant lactobacillus sour dough fermenting agent as well as a preparation method and an application thereof. The preparation method of the direct-throwing type plant lactobacillus sour dough fermenting agent comprises the following steps of: activating plant lactobacillus, preparing the direct-throwing type plant lactobacillus sour dough fermenting agent and the like. The sour dough fermenting agent disclosed by the invention can be used for producing flour foods including breads, steamed breads and the like; the sour dough fermenting agent can be used for delaying the ageing of the foods including the breads and the like, the flavor is very obviously improved and the use is convenient; and the direct-throwing type plant lactobacillus sour dough fermenting agent has a lead reducing function, is very suitable for industrial production and has a very good application prospect.

The invention discloses a preparation method of a lithium ion battery cathode material, belonging to the technical field of preparation of lithium ion battery cathode materials. The lithium ion battery cathode material is a nickel manganese lithium aluminate three-component cathode material and has the chemical formula of LiNi0.5-xMn0.5-xAl2xO2, wherein x=0.01-0.075. The three components of nickel, manganese and aluminum are precipitated at the same time by using a complete coprecipitation method so that the three elements are evenly mixed on the molecular level, and the solid-phase reaction is performed on the three elements and lithium salt, thereby the uniform degree of a product is greatly improved; spherical nickel manganese lithium aluminate particles are prepared by using mechanical ball milling and spray pelleting technologies, thereby the stacking density of the materials is improved and the volume energy density of the battery is further increased. Besides, the method realizes that a nickel manganese aluminum precursor is fully mixed with the lithium salt, therefore, the batch stability of the products is improved and large-scale production is facilitated.

The invention discloses a silicon embedded redox graphene/graphite phase carbon nitride composite material, preparation and application thereof. The silicon embedded redox graphene/graphite phase carbon nitride composite material comprises a redox graphene/graphite phase carbon nitride composite matrix serving as the base material, nano-silicon spheres that act as the active centre and are evenlydispersed and embedded in the lamellar gap of the redox graphene/graphite phase carbon nitride composite matrix, and a carbon layer that is located on the surfaces of the nano-silicon spheres and canstrengthen the chemical bonding force between the active centre and the base material. The silicon embedded redox graphene/graphite phase carbon nitride composite material provided by the invention has good electrochemical cycle performance, excellent compatibility and structural stability, can give play to good synergistic effect between the components, also has high batch stability, and is easyfor large-scale production.

A method for treatment on a high-voltage Ni-Co-Mn ternary positive electrode material by a surface drying method comprises the following steps of firstly, sieving and dispersing a lithium salt, weighing and adding the lithium salt and a Ni-Co-Mn hydroxide into a blending mixer for mixing according to a mole ratio of (1.0-1.2):1, mixing the lithium salt and the Ni-Co-Mn hydroxide to obtain mixed raw powder; secondly, loading and compacting the mixed raw powder in a pot, carrying out sintering in a high-temperature air atmosphere, cooling until the tapping temperature is less than or equal to 80 DEG C, taking a powder body out, and carrying out weak breaking, dispersing and sieving on the powder body in a drying room to obtain a high-dispersion Ni-Co-Mn ternary material substrate; thirdly, weighing and adding the high-dispersion Ni-Co-Mn ternary material substrate and a cladding agent A into a grinding blending mixer for mixing according to a mole ratio of 1:(0.1-0.001), and allowing the high-dispersion Ni-Co-Mn ternary material substrate and the cladding agent to be in mixed contact, thereby obtaining a mixed material; loading the mixed material in the pot, cooling after sintering the mixed material in the high-temperature air atmosphere to a solid phase until the tapping temperature is less than or equal to 80 DEG C, taking the powder body out, and carrying out sieving to obtain the high-voltage Ni-Co-Mn ternary material. According to the method, the high-voltage Ni-Co-Mn ternary positive electrode material which has the characteristics of high capacity, high cycle, high temperature and favorable safety can be prepared.

The invention discloses a novel process for preparing a low-cost battery-grade iron phosphate material by using iron hydroxide. The process comprises the following steps: mixing a zero-valent iron source and corrosive acid in a molar ratio, and adding a certain amount of primary water and ammonia water; stirring to react for 0 to 24 hours, and slowly adding hydrogen peroxide until the iron source disappears and the solution turns to orange; adding surfactant which is 1 to 5 percent that of the mass of the iron source into the solution; adding a reagent containing phosphate radicals into the solution according to a certain molar ratio of iron element to phosphor element under a stirring condition to obtain iron phosphate precipitate; filtering and washing the product 3 to 5 times with the primary water which is 3 to 7 times the weight of the iron phosphate; drying in vacuum for 4 to 12 hours at 50 and 80 DEG C to obtain FePO4.2H2O. The process for preparing battery grade iron phosphate is simple and easy to carry out and low in cost; and the prepared product has good product crystal structure, few impurities and uniform granularity and is suitable for industrial scale production; moreover, the lithium iron phosphate prepared by the process has high specific capacity, low self-discharge, high tap density, stable product performance and good processing performance.

The invention provides a preparation method of a TC17 titanium alloy flat square section bar. The preparation method comprises the following steps that (1) a riser and an ingot bottom of a TC17 titanium alloy cast ingot are cut off, and surface defects are removed; (2) billet forging is performed on the TC17 titanium alloy cast ingot, and primary forging stocks are obtained; (3) first middle forging is performed on the primary forging stocks, and first middle forging stocks are obtained; (4) second middle forging is performed on the first middle forging stocks, and second middle forging stocks are obtained; (5) sawing is performed on the second middle forging stocks, then forming forging is performed, and a semi-finished flat square section bar is obtained; and (6) heat treatment is performed on the semi-finished flat square section bar, and the TC17 titanium alloy flat square section bar with the length of 850 mm to 1600 mm, the width of 132 mm and the thickness of 65 mm to 100 mm is obtained. The preparation method has the advantages of integral technical scheme, strong process controllability, uniformity in product texture and shape, excellent overall performance, high batch stability and high yield and is suitable for large-scale industrial production.

The invention discloses a secondary sintering synthesis method for lithium iron phosphate, which comprises the following process steps of: 1, preparing materials in a molar ratio of lithium to iron to phosphorus element of (0.98-1.02): 1: 1, and mixing the materials uniformly; 2, heating the obtained mixture to between 350 and 550 DEG C, preserving the heat for 5 to 15 hours, then cooling the mixture along with a furnace to room temperature, and crushing the obtained material to obtain lithium iron phosphate powder; 3, mixing the obtained lithium iron phosphate powder, a carbon source and a solvent uniformly, drying the mixture and then heating the mixture to between 650 and 850 DEG C, preserving the heat for 10 to 20 hours, then cooling the mixture along with the furnace to room temperature, and crushing, screening and grading the mixture to obtain a screened product which is a lithium iron phosphate product produced by the method. The method is simple; the operation is convenient; the prepared lithium iron phosphate has high electric conductivity, good storage performance, good low-temperature performance and good batch consistency; and the method greatly improves the electric conductivity, low-temperature performance, storage performance and batch stability of the lithium iron phosphate. The method is suitable for industrialized production and can replace the conventional one-time high temperature sintering process.

Disclosed in the invention is a working electrolyte for an ultrahigh-voltage aluminium electrolytic capacitor. The working electrolyte comprises the following raw materials, by mass percent: 49 to 76% of a main solvent, 5 to 20% of a secondary solvent, 6 to 25% of a solute, and 3 to 10% of a property-modifying additive. According to the manufacturing method, the main solvent and the secondary solvent are mixed; the solute is added at the temperature of 100 to 115 DEG C, and stirring is carried out and the temperature rises 130 to 135 DEG C; heat-preservation stirring is carried out and reaction is also carried out for 10 to 40 minutes; and cooling is carried out until the temperature is reduced to 70 to 90 DEG C and then the property-modifying additive is added, thereby completing preparation. According to the invention, with application of special materials, the special preparation process is used; and on the basis of optimized formulas, the combined effect of the materials is realized. The prepared working electrolyte having advantages of reasonable cost, long service life, high high-temperature stability, and high batch stability can meet the urgent need of factories in the country, especially the need of the high-end manufacturers.

The invention relates to a method for making steamed buns. The method comprises the following steps: activating Lactobacillus plantarum, making a sour dough containing Lactobacillus plantarum, fermenting by utilizing Lactobacillus plantarum to make a steamed bun dough, fermenting small doughs obtained after dividing the steamed bun dough, and steaming the small doughs. The method uses the Lactobacillus plantarum CCFM8661 to ferment in order to make steamed breads and uses no commercial yeasts, the steamed buns made through the method have a rich flavor, and an insufficient flavor disadvantage caused by the use of a single yeast to ferment of products mode in the present market is overcome; and the steamed buns made through the method have the advantages of fine construction structure, good batch stability, and high safety.

The invention discloses a porous polyimide composite retainer tube blank pre-heating, limiting and pressing process. The process comprises the following eight steps: 1, performing pretreating of vacuum drying on a raw material of polyimide; 2, weighing according to the weight percentage, and preparing a porous polyimide composite material; 3, forming the size of a retainer mould; 4, screening the porous polyimide composite material to remove small particles or impurities which are not mixed uniformly; 5, filling the porous polyimide composite material into the mould; 6, putting the mould filled with the material into a constant-temperature drying box, and preserving heat for 20-40 minutes; 7, taking out the mould, and limiting and pressing the mould; and 8, after demoulding, putting into a programmable sintering furnace for sintering and shaping. By the porous polyimide composite retainer tube blank pre-heating, limiting and pressing process, in a free sintering process, phenomena such as loose texture, low tensile strength and large pore size and porosity of a product due to a small forming pressure as well as stress cracking and poor consistency of material properties between tube blanks due to a large forming pressure can be avoided.

The invention discloses a polytetrafluoroethylene composite, a polytetrafluoroethylene composite holder for a bearing and a preparation method of the polytetrafluoroethylene composite holder for the bearing. The polytetrafluoroethylene composite is prepared from, by mass, 3%-8% of coupling agent modified nano aluminum oxide, 2%-5% of molybdenum disulfide and 90%-95% of polytetrafluoroethylene. The polytetrafluoroethylene composite is prepared by compounding polytetrafluoroethylene, coupling agent modified nano aluminum oxide and molybdenum disulfide. Nano aluminum oxide is large in heat conductivity and small in grain size, the crushing resistance, heat conductivity and wear resistance of the composite can be remarkably improved, the material surface activity can be improved after nano aluminum oxide is modified with a coupling agent, and surface binding force is increased. The friction and wear resistance of the composite can be enhanced through molybdenum disulfide; the composite has excellent self-lubricating performance and high tensile strength, crushing resistance, heat conductivity and friction and wear resistance are obviously improved, and the requirement of the ultralow-temperature high-speed bearing on the holder is met.

The invention discloses a titanium alloy plate, relating to the technical field of formulas for the titanium alloy plate. The titanium alloy plate is prepared from the following ingredients in percentage by mass: 0.16% of Ni, 6% of Al, 0.6% of Zn, 0.5% of Nb, 0.100% of V, 0.45% of Mo, 0.08% of Bi, 0.45% of Mg, 0.85% of Si, 0.02% of Sn, 0.06% of Co, 0.06% of Cr, 0.03% of Ta, 0.07% of Ca, 0.05% of Y, 0.8% of Mn, 0.30% of Pb, 0.06% of Zr, 0.06% of Te, 0.06% of Fe, 0.15% of Cu, 0.35% of W and the balance of titanium and non-metallic inclusion. In the formula, a proper amount of elements such as silicon, iron, aluminum and magnesium are added, the high-temperature creep resistance of alloy is improved, and the stability of plate performance is improved.

The invention discloses a lithium niobite/niobium-base oxide/silicon compound cathode material, a preparation method and an application thereof. The lithium niobite/niobium-base oxide/silicon compoundcathode material comprises a silicon active center and a lithium niobite/niobium-base oxide mixed shell layer uniformly coated on the surface of the silicon active center. The lithium niobite/niobium-base oxide/silicon compound cathode material provided by the invention takes lithium niobite as a fast ion conductor, so that the rapid transferring of lithium ions under room temperature and even high temperature can be effectively guaranteed; the synergic alloying effect of the lithium niobite and the niobium-base oxide is beneficial to the structure and surface stability of the silicon duringan electrochemical reaction process, so that the lithium niobite/niobium-base oxide mixed shell layer can be used as a stress buffer layer, an ionic conduction layer and a surface stabilizing layer; the lithium niobite/niobium-base oxide/silicon compound cathode material has high initial coulombic efficiency and excellent electrochemical circling stability performance.

The invention belongs to the technical field of preparation of titanium alloy wires, and particularly relates to a method for controlling homogeneity of structure properties of high-strength and high-plasticity TB6 titanium alloy wires. The method comprises the following steps: carrying out multi-pass large deformation hot rolling on a TB6 titanium alloy bar with the specification of phi 40mm- phi45mm* 800mm-1200mm at first to obtain a bar with the specification of phi 9 mm-phi 10 mm; then carrying out single-phase region solid-solution treatment and then carrying out cold rolling, and controlling total deformation of cold rolling to be 15-36% to obtain a wire with the specification of phi 6 mm-phi 7 mm; and finally, carrying out ageing treatment on the wire at the temperature of 520-560 DEG C. The method is simple in process parameter setting, convenient to operate and high in process controllability, and the tensile strength sigma b of the wire in an aged state at the room temperature is greater than or equal to 1050 MPa, the yield strength sigma 0.2 is greater than or equal to 1000 MPa, the elongation delta 5 is greater than or equal to 15%, the percentage reduction of area psiis greater than or equal to 50%, the batch stability is high, and the repeatability is good.