3results about How to "No decomposition" patented technology

The invention discloses a negative electrode powder recovery method which comprises the following steps: S1, carrying out electrified crushing and drying on a waste lithium battery, and then carrying out winnowing to remove a shell and a diaphragm to obtain a mixture; s2, adding the mixture into water for soaking, carrying out solid-liquid separation, drying and screening to obtain negative electrode powder, and then carrying out color sorting separation on a negative electrode current collector and a positive electrode plate; s3, performing heat treatment on the positive plate, stripping the positive powder, and then screening and separating the positive powder and the positive current collector; and S4, the negative electrode powder obtained in S2 is taken and subjected to acid pickling, water washing and calcination in sequence, then graphene and carbon nanotubes are added for ball milling, and modified graphite is obtained. According to the method, the negative electrode powder, the negative electrode current collector, the positive electrode powder and the positive electrode current collector can be effectively separated, the obtained negative electrode powder has few impurities, the impurities can be removed and the layered structure of graphite can be structured only through simple acid pickling and calcination, so that direct ball milling treatment with graphene and carbon nanotubes is facilitated, and the electrochemical performance of the graphite is improved.

This application discloses a method for 3D printing aluminum alloy bearing cages, belonging to the field of cage production technology. The method includes the following steps: (1) preparing a matrix powder; (2) pretreating untreated SiC nanoparticles with nickel-phosphorus plating to obtain SiC nanoparticles coated with an average layer thickness of 60-100 nm nickel-phosphorus layer, mixing them evenly with the obtained matrix powder to obtain a powder, and then using laser powder bed 3D printing to perform layer-by-layer printing to obtain a preliminary blank; (3) heat-treating the preliminary blank to obtain the aluminum alloy cage. The aluminum alloy bearing cage prepared by adding SiC nanoparticles and using laser powder bed 3D printing has high hardness and good wear resistance, which not only extends the service life of the cage but also enables rapid short-term production of the cage.

The application discloses an SST solid-state transformer magnetic core and a preparation method thereof. The SST solid-state transformer magnetic core comprises an iron-based nanocrystalline strip substrate, and the front and back surfaces of the iron-based nanocrystalline strip substrate are provided with dense SiO2 insulation coating layers, and the thickness of the SiO2 insulation coating layers is 0.2-1.4 microns. The iron-based nanocrystalline magnetic core has low-frequency magnetic properties, and meanwhile, the full-frequency performance of the magnetic core after cutting can be stably controlled.