13 results about "Lithium stearate" patented technology

The application relates to the application field of metal powder metallurgy technology and discloses a copper-based composite material metal block capable of resisting impact energy and a preparation process and application thereof. The copper-based composite material metal block is used in impact and collision process tests, and impact energy absorption, reduction or elimination is realized by self-pulverization and disintegration. Raw materials of the copper-based composite material capable of resisting impact energy include, in percentage by mass, 1-95% of atomized copper powder, 0-95% of electrolytic copper powder, 1-15% of tin powder, 1-2% of molybdenum disulfide, 0-3% of graphite, 0-7% of phenolic resin, 0-1% of lithium stearate and 0-1% of magnesium stearate. The above raw materials are mixed, secondarily pressed, sintered and electroplated to form the copper-based composite material. When encountering an impacted metal barrier section, the metal block can absorb the counter-impact energy and disintegrate by itself, so that the running speed instantaneously drops to zero, the metal fragment splashing phenomenon does not occur, and the copper-based composite material does not contain lead metal, so that the whole impact and collision process is harmless to the surrounding environment.

The invention discloses a ferrous oxalate / lithium stearate composite negative electrode material and a preparation method thereof, and belongs to the technical field of lithium ion battery negative electrode materials. A ferrous oxalate dihydrate sample synthesized by ferrous sulfate and oxalic acid through a hydrothermal method is used as a raw material; sufficiently grinding and mixing a proper amount of ferrous oxalate dihydrate and a lithium stearate additive in a planetary ball mill; and roasting the uniformly mixed sample at low temperature in an argon or nitrogen inert atmosphere to obtain the stable rod-like ferrous oxalate / lithium stearate composite negative electrode material. The invention overcomes the problems of ferrous oxalate material structure defects, unstable particle fracture, serious electrode pulverization and the like in the existing low-temperature sintering technology.

The application discloses a metal powder forming die convenient for demolding, which comprises a top plate, upper and lower die plates, upper and lower cavity plates forming a forming cavity and a base, is equipped with a low-pressure pneumatic demolding assembly, and comprises a ejector pin, a push plate and an air nozzle. The die is used for preparing a metal structural part, and a formula comprises 40-50 parts of copper powder, 30-40 parts of 316L stainless steel powder, 20-30 parts of nickel powder and lithium stearate, carbon nanotube and other additives. A preparation method comprises drying, fluorosilane coupling agent coating, ball milling, screening, 650-950 MPa pressing and 950-1150 DEG C argon protection sintering, and the obtained part has high bending strength and few demolding defects.

The application discloses a powder metallurgy warm pressing process and application thereof, and relates to the field of forming technology of metallurgical parts. The powder metallurgy warm pressing process comprises the following steps: mixing alloy powder raw materials and internal lubricant to obtain a mixture; heating and treating the mixture in a reducing protective atmosphere to obtain heated mixture; feeding the heated mixture into a mold for warm pressing treatment to obtain a green body; and sintering the green body to obtain a powder metallurgy workpiece; wherein the internal lubricant comprises polytetrafluoroethylene, lithium stearate, molybdenum disulfide, copper powder, graphite powder and a dispersing agent. The application improves the powder pressing formability by heating the powder during powder mixing and heating the mold during pressing, and uses special internal lubricant and mold wall lubricant, so that the density and performance of the powder metallurgy workpiece are improved.

This invention provides a solid polymer electrolyte membrane with high interfacial stability and its solvent-free preparation method. The method involves first drying lithium stearate powder and binder powder to remove moisture; then mixing the lithium stearate powder and binder powder, and synthesizing a novel polymer electrolyte-lithium stearate electrolyte membrane (LST) via a roll pressing method. This invention uses lithium stearate, and the prepared LST can suppress lithium growth by reducing surface overpotential and local current density, effectively promoting uniform lithium deposition and thus suppressing side reactions at the lithium anode. Experiments show that batteries using the LST prepared in this invention as the electrolyte (with LiFePO4 (LFP) as the positive electrode material and lithium metal as the negative electrode), as well as lithium-to-lithium half-cells, exhibit better electrochemical performance than the control group using a traditional organic Celgard 2500 separator, demonstrating the great potential of LST in long-life and high-performance lithium batteries.

The invention discloses a long-chain alkyl substituted phosphate aluminum salt nucleating agent and preparation and in-situ nucleation application thereof, the long-chain alkyl substituted phosphate aluminum salt nucleating agent is prepared by reacting 2, 2 '-methylene bis (4, 6-di-tert-butylphenyl) phosphate, aluminum isopropoxide and saturated fatty acid or saturated fatty alcohol with the carbon atom number of 12-18 according to the molar ratio of 2: (0.8-1.2): (0.8-1.2), the preparation method does not use inorganic bases such as sodium hydroxide and sodium carbonate, and the long-chain alkyl substituted phosphate aluminum salt nucleating agent is suitable for industrial production. The whole process is free of sodium salt or potassium salt industrial wastewater and is green and environment-friendly, the nucleating agent and fatty acid lithium (such as lithium stearate, lithium laurate and lithium palmitate) need to be jointly added into polypropylene, melt blending is performed for 1-3 minutes at the temperature of 190-230 DEG C, the haze of a product can be remarkably reduced, and the bending modulus can be improved; the invention also provides a polypropylene composition containing the nucleating agent as well as a preparation method and application of the polypropylene composition. The obtained polypropylene product has good transparency and high rigidity, and is suitable for the high-end fields of food packaging containers, medical transparent instruments and the like; the technical problems that an existing nucleating agent is poor in dispersity, large in synthesis pollution and low in nucleating efficiency are solved.

The application discloses a method for reducing magnetic substances in battery-grade lithium carbonate, and relates to the technical field of lithium battery material manufacturing. The method realizes uniform coating by means of precise addition of lithium stearate through atomization spraying and low-temperature crushing under the protection of inert gas, significantly reduces the amount of modifier, inhibits particle agglomeration, effectively improves the magnetic substance removal efficiency of subsequent electromagnetic continuous demagnetization and multi-stage magnetic separation, and simultaneously innovatively adopts a two-stage solvent washing and ceramic membrane vacuum drum filtering mode to efficiently remove organic residues and block secondary metal pollution, so that the problems of purity reduction and cost increase caused by lithium stearate residue can be comprehensively solved, and a dual breakthrough of magnetic substance control and organic impurity removal is realized.

This application relates to a high-voltage, low-resistance wire clamp and its preparation method, belonging to the field of special materials technology for power protection. It includes a wire clamp body, within which a main conductor, a secondary conductive block, a main conductive block, and branch conductors are sequentially connected. The spaces between these sequentially connected parts are coated with an electrical composite grease that reduces the gaps between components and lowers resistance. This grease comprises: benzyl silicone oil, lithium 12-hydroxystearate soap, conductive silver paste, ultrafine copper powder, graphene, conventional carbon nanotubes, pentaerythritol tetrastearate, surface-functionalized carbon nanotubes, antioxidants, preservatives, arc suppressants, and antifungal agents. By introducing surface-functionalized carbon nanotubes and pentaerythritol tetrastearate solid powder, the directional migration of carbon nanotubes at abnormal heating points is achieved, thereby curbing temperature rise and effectively preventing the vicious cycle of thermal runaway. This gives the composite grease the ability to cope with localized abnormal overheating and extreme electrical stress conditions, and it also has the effect of optimizing and reconstructing its own conductive structure.

The application relates to the technical field of lithium ion batteries, and discloses a modified silicon monoxide material and a preparation method and application thereof. The method comprises the following steps: (1) mixing silicon monoxide and lithium stearate through ball milling to obtain a mixed precursor; (2) performing sintering treatment on the mixed precursor obtained in the step (1) in an inert atmosphere to obtain the modified silicon monoxide material; wherein the sintering treatment temperature is 200-900 DEG C. The preparation method has the advantages of simple preparation method, good uniformity, convenient regulation and control, and facilitation of large-scale industrial production.

Methods for producing an iron core, comprising: a step for the preparation of a raw material powder comprising a coated pure iron powder formed from a variety of pure iron particles, each having an insulating coating layer, a coated iron alloy powder formed from a variety of iron alloy particles, each having an insulating coating layer, and a metal soap; a step towards the production of a molded part by compression molding of the raw material powder filled into a mold; and a step to carry out a heat treatment of the molded part in order to eliminate deformations in the coated pure iron powder and in the coated iron alloy powder, wherein a difference Tm-Td between a melting point Tm of the metal soap and a temperature Td of the mold in the step to produce the molded part is greater than or equal to 90 °C, the temperature Td of the mold is equal to the temperature of a raw material powder contact section of the mold immediately before the raw material powder is poured in, a proportion of metal soap in the raw material powder is greater than or equal to 0.02% by mass and less than or equal to 0.80% by mass, Each of the iron alloy particles contains at least one additional element, selected from Si and Al, the insulating coating layer contains a phosphoric acid compound which contains a phosphate salt as its main component, the metal soap contains at least one substance selected from the group consisting of lithium stearate, barium stearate, sodium stearate, zinc stearate and aluminium stearate, a forming pressure of the compression molding process is greater than or equal to 500 MPa and less than or equal to 3000 MPa, the temperature Td of the mold is higher than or equal to 60 °C and lower than or equal to 130 °C and The step involves carrying out a heat treatment of the molded part in an atmosphere with an oxygen concentration greater than 0 volume ppm and less than or equal to 10,000 volume ppm at a temperature greater than or equal to 400 °C and less than or equal to 1,000 °C and with a residence time greater than or equal to 10 minutes and less than or equal to 60 minutes.

The lithium stearate production discharging pulverizer comprises a supporting plate, a box body, a fixing plate, a scraping and brushing plate and a rotating shaft, a support is installed on the inner side of the supporting plate, an electric telescopic rod is fixedly installed on the outer side of the supporting plate, feeding ports are formed in the left side and the right side of the upper portion of the box body respectively, a dust cover is arranged above the box body, and a discharging opening is formed in the upper portion of the dust cover. A threaded bolt is arranged at the bottom end of the dustproof cover, a motor is installed in the dustproof cover, a connecting bolt is arranged on the outer side of the fixing plate, a connecting rod workpiece is arranged on the inner side of the scraping and brushing plate, a rotating shaft is connected to the bottom end of the motor, a rotating disc is installed on the rotating shaft, and first blades are arranged below the rotating disc. According to the lithium stearate production discharging pulverizer capable of achieving uniform adding, the scraping and brushing plate and the rotating shaft are arranged, the inner wall of the box body can be conveniently cleaned, meanwhile, an electric telescopic rod, a first blade, a second blade and a rotating disc are arranged, materials are uniformly added, and meanwhile the problem that the pulverizing effect is poor is solved.

This invention discloses a lubricating grease for automotive electric window regulators and its preparation method. By mass fraction, it comprises the following components: 54%-63% polyalphaolefin synthetic oil, 6%-7% silicone oil, 10%-13% thickener, 15%-23% solid lubricant, 1%-1.5% rust inhibitor, 1%-2% antioxidant, and 1%-1.8% polymer; wherein the weight ratio of polyalphaolefin synthetic oil to silicone oil is 9:1; and the viscosity of the silicone oil at 25°C is within 100 mmHg. 2 / s-750mm 2 / s; the viscosity range of polyalphaolefin synthetic oil at 100℃ is 4mm. 2 / s-10mm 2 / s; The thickener is lithium stearate, produced by reacting fatty acids with an aqueous solution of lithium hydroxide. This invention uses silicone oil and PAO oil together as base oils. After thickening the base oils with a thickener, a high-lubricity solid lubricant is added to develop a grease with excellent low-temperature performance, excellent lubricity, excellent low odor, and excellent dust resistance. It is suitable for lubricating the friction pairs of electric window lift guide rails, wire ropes, pulleys, and winding reels, meeting the product requirements of window lifters.

The invention discloses nano lithium stearate for a lithium battery and a preparation method of the nano lithium stearate, and belongs to the technical field of lithium batteries, D50 of the nano lithium stearate is 30-60 nm, D90 of the nano lithium stearate is 45-105 nm, the chlorine ion content of the nano lithium stearate is smaller than or equal to 0.01 wt%, the nano lithium stearate is prepared through a phase-transfer catalysis method, and the nano lithium stearate is a lithium-ion battery. The nanoscale lithium stearate is prepared by adding a phase transfer catalysis technology into an oil-water two-phase system, the purity of the obtained lithium stearate product is high, the particle size reaches the nanoscale, and the lithium stearate product can be applied to an electrode and an electrolyte additive of a lithium ion battery.