16 results about "Aluminium element" patented technology

The application discloses a vacuum metallurgy connecting method of high-silicon aluminum alloy, and relates to the technical field of diffusion welding, and comprises the following steps: S1, a high-silicon aluminum alloy workpiece to be welded is subjected to pre-welding treatment in a mode of friction stir welding, so as to increase the content of aluminum elements on the surface of the high-silicon aluminum alloy workpiece to be welded; and S2, the high-silicon aluminum alloy workpiece to be welded subjected to the treatment in the step S1 is subjected to diffusion welding under vacuum conditions, so as to obtain a high-silicon aluminum alloy workpiece after welding. The application has the advantages that the operation is simple, before the diffusion welding of the high-silicon aluminum alloy with high content of silicon elements, a process metallurgy method is used to perform pre-welding treatment on the surface to be welded, so as to increase the content of aluminum elements on the welding surface, further increase the contact proportion of aluminum elements on the diffusion welding surface, and finally realize the increase of the strength of the diffusion welding joint. That is, the advantages of the high-silicon aluminum alloy material are maintained, and the strength of the diffusion welding joint is improved.

The utility model relates to battery technical field discloses a cover plate of battery, the shell of battery, battery and battery group. The cover plate of battery includes: a plurality of board bodies of laminated settings, a plurality of board bodies include the top plate and the bottom plate in the opposite two sides of laminated direction, the top plate includes metal element, metal element includes at least one of aluminium element and copper element, the bottom plate includes titanium element, the outer edge of top plate is located the inside of the outer edge of bottom plate. Utilize the bottom plate containing titanium to play the supporting action, promote the structural strength of cover plate, and then enhance the overall rigidity, can improve the structural stability of battery significantly, the top plate contains copper and / or aluminium, copper and aluminium can all realize high quality connection through laser welding, ultrasonic welding, resistance welding etc. mode, is convenient for when welding busbar in the subsequent, and welding stability is higher, and then improve the welding reliability, enhance current transmission efficiency, improve the overcurrent capacity of cover plate and busbar.

The application provides a method for continuously removing impurities in a neodymium-iron-boron waste hydrochloric acid optimum solution in situ and application thereof, and the method comprises the following steps: adding the oxidized hydrochloric acid optimum solution into an overflow reactor, controlling the adding speed to make the oxidized hydrochloric acid optimum solution mix with the bottom liquid in the overflow reactor, adjusting the pH of the mixed solution of the hydrochloric acid optimum solution and the bottom liquid in the overflow reactor to a set value by using a neutralizing agent, so that the content of free iron ions in the mixed solution is lower than a set concentration, thereby obtaining a neutralized solution, and the obtained neutralized solution is aged to obtain a rare earth solution from which impurity elements are removed. The method realizes the hydrolysis and co-precipitation of iron and aluminum elements, and realizes the in-situ adsorption of impurity elements such as fluorine and boron by using the strong adsorption capacity of the hydrolysis product to fluorine and boron, thereby realizing the efficient removal of impurities such as iron, aluminum, fluorine and boron in the hydrochloric acid optimum solution. The method also reduces the entrainment loss of rare earth elements in the process of removing impurity elements, and improves the filtration performance of the impurity removal residue.

The invention provides a modified lithium iron manganese phosphate positive electrode material, a preparation method thereof and a lithium ion battery. The modified lithium manganese iron phosphate positive electrode material comprises an inner core, and a shell and a protective layer which are coated on the surface of the inner core, the inner core comprises a lithium manganese iron phosphate material, and the doping concentration of the aluminum element in the shell is distributed in a sectional index increasing mode from inside to outside in the radial direction. According to the invention, the comprehensive performance optimization of the lithium manganese iron phosphate positive electrode material is realized, the doping concentration of the aluminum element in the shell is distributed in a sectional index increasing manner from inside to outside along the radial direction, and the cycle life and mechanical stress adaptability of the material are improved due to the design; meanwhile, the outermost protective layer can effectively reduce the interface impedance and improve the structural stability of the material. In conclusion, the modified lithium iron manganese phosphate positive electrode material realizes comprehensive improvement of material bulk phase stability, interface stability and conductivity, and has excellent comprehensive performance.

The invention provides a terminal electrode glass composition, terminal electrode copper paste, a multilayer ceramic capacitor and a manufacturing method of the multilayer ceramic capacitor. The termination electrode glass composition includes a first main component, a first sub-component, and a second sub-component. The first main component comprises an alkaline earth metal oxide; the first auxiliary component comprises a zinc element; and the second auxiliary component comprises an aluminum element and a silicon element. Based on 100 wt% of the terminal electrode glass composition, the first main component is 70 wt% to 75 wt%. Based on 100 wt% of the first main component, the first auxiliary component is 25 wt% to 30 wt%, and the second auxiliary component is 7 wt% to 11 wt%. Therefore, the terminal electrode has acid etching resistance, and the burning temperature in the multilayer ceramic capacitor process is reduced.

The invention relates to a positive electrode-solid electrolyte integrated structure, a preparation method and a solid-state battery, belongs to the technical field of solid-state batteries, and aims to solve the problems that the solid-state battery is poor in cycle performance and poor in reliability due to the fact that an interface between a solid electrolyte and an electrode material is unstable, low in ion transport kinetics and relatively high in interface impedance in an existing method. And the energy density is low. According to the preparation method, the aluminum element is doped by adopting an electrochemical method, the controllability of the preparation material is realized, the carbon-coated sodium-rich aluminum-doped titanium sodium phosphate is prepared by adopting the electrochemical method, high-temperature sintering preparation is avoided, the energy is saved, the product purity is high, and the preparation method is simple; the oxidation thickness is controlled by controlling pulse current, temperature and time, so that the thickness of the solid electrolyte is controlled, and the solid electrolyte with a certain thickness is prepared. The positive electrode and the solid electrolyte are prepared into an integrated structure without a contact interface, so that the interface contact resistance is greatly reduced, the cycle performance and the rate performance are excellent, and the energy density of the battery is improved.

The present application relates to a method for recovering phosphorus and aluminum from lithium iron phosphate battery lithium extraction waste residue, the preparation method comprising the following steps: (1) mixing lithium iron phosphate battery lithium extraction waste residue and alkali liquor, after the first leaching reaction, obtaining phosphorus aluminum leaching solution and leaching residue; (2) mixing the phosphorus aluminum leaching solution obtained in step (1) with calcium salt, after reaction, obtaining aluminate solution and phosphorus-rich residue. The present application extracts the phosphorus and aluminum components in lithium iron phosphate battery lithium extraction waste residue simultaneously, obtaining recyclable aluminate solution and phosphorus-rich residue, wherein the P2O5 content in the phosphorus-rich residue is ≥30%, which can be directly used as high-grade phosphate ore for wet-process phosphoric acid production. Through the above recovery steps, the recovery rate of phosphorus and aluminum elements both reaches more than 92%, realizing the high-value utilization of lithium iron phosphate battery lithium extraction waste residue; the recovery process and equipment are relatively conventional, the operation is simple and easy to implement, and it has strong practicality.

The application discloses a multi-scale cross-medium carbon pollution coupling flow direction modeling method based on process nodes, and belongs to the technical field of carbon pollution emission analysis. Based on long-process and short-process energy material metabolism in aluminum production process, aluminum element flow models and carbon pollution coupling emission flow models in long-process and short-process production processes are established. Based on the use of raw materials and energy in the production process, the transfer emission of CO2eq is calculated, and spatial transfer models at the provincial scale and the national scale are established. Based on multi-scale greenhouse gas emission and multi-medium pollutant emission data, a multi-medium emission factor model is established. The aluminum element flow model and the carbon pollution coupling emission flow model, the spatial transfer model and the multi-medium emission factor model are combined to establish a multi-scale cross-medium carbon pollution coupling flow direction model based on process nodes. The application focuses on the emission driven by spatial transfer, makes the analysis more rigorous and comprehensive, and realizes real-time monitoring of carbon pollution emission.

The invention provides a regeneration method of a retired lithium battery positive electrode material, a regenerated positive electrode material, a lithium ion battery and an electric device, and relates to the technical field of waste lithium battery recovery. The regeneration method comprises the following steps: carrying out primary calcination on a decommissioned positive plate in an oxygen-containing atmosphere to obtain decommissioned positive electrode powder; wherein a positive electrode active material in the retired positive plate comprises lithium-containing transition metal phosphate, and retired positive electrode powder contains an aluminum element; mixing the retired positive electrode powder with a lithium source, an organic carbon source and a phosphorus source to obtain a mixed material; and carrying out secondary calcination on the mixed material in a protective atmosphere to obtain the regenerated positive electrode material with the carbon / aluminum phosphate mixed coating layer. According to the regeneration method, the initial discharge gram capacity and the high-temperature cycle performance of the lithium ion battery prepared from the regenerated positive electrode material can be improved while aluminum-containing impurities are removed.

This application relates to a method for preparing recycled fluorite using desulfurized gypsum slag and waste electrolyte, belonging to the field of metallurgical engineering technology. This invention targets the hazardous solid waste of waste electrolyte generated during aluminum electrolysis, employing a desulfurized gypsum slag calcination-leaching-flotation process to convert soluble fluorides in the waste electrolyte into insoluble calcium fluoride. The waste electrolyte is mixed with desulfurized gypsum slag and calcined, converting the fluorine-containing phase into water-insoluble calcium fluoride, sodium into water-soluble Na₂SO₄, and aluminum into Al₂O₃. Na₂SO₄ is then separated into the liquid phase by water washing, leaving CaF₂ and Al₂O₃ in the washed residue. The washed residue is then subjected to flotation to separate CaF₂ and Al₂O₃. This method can produce a product with a CaF₂ purity greater than 80%, and lithium, sodium, and aluminum can also be recovered through comprehensive treatment.

The invention provides a magnesium alloy and a preparation method thereof, a magnesium product and a preparation method of the magnesium product. The magnesium alloy comprises a magnesium matrix as well as an aluminum element, a lanthanum element, a zinc element, a manganese element, an iron element, a silicon element, a copper element and a nickel element which exist in the magnesium matrix, in the magnesium alloy, the mass percentage of the aluminum element is 5.0%-8.0%; the mass percentage content of the lanthanum element is 1.0%-2.5%; the mass percentage content of the zinc element is 0.5%-1.5%; the mass percentage content of the manganese element is 0.1%-1.0%; the mass percentage content of the iron element is less than 0.004%; the mass percentage content of the silicon element is less than 0.05%; the mass percentage content of the copper element is less than 0.008%; the mass percentage content of the nickel element is less than 0.001%. According to the magnesium alloy provided by the invention, the yield strength, the tensile strength, the ductility and the casting fluidity of the magnesium alloy are improved by accurately controlling the types and the contents of all the elements in the magnesium alloy.

The invention relates to a preparation method of high-purity quartz sand doped with aluminum on the surface, which comprises the following steps: weighing an aluminum-containing medicament, dissolving with pure water, and stirring to form an aluminum salt solution; the method comprises the following steps: weighing a certain amount of high-purity quartz sand, adding an aluminum salt solution to form a turbid solution according to the aluminum content of the quartz sand and the number of aluminum elements needing to be doped, soaking for 1-30 minutes, removing most moisture through low-temperature drying, removing residual moisture through high-temperature drying, and finally uniformly mixing by using a mixer to obtain the high-purity quartz sand with the surface doped with the aluminum salt; the prepared high-purity quartz sand with the surface doped with the aluminum salt is placed in a high-temperature environment to be calcined, and the high-purity quartz sand with the surface doped with aluminum is obtained; and 3, washing the high-purity quartz sand doped with aluminum on the surface obtained in the step 3 with pure water, and drying and cooling after washing. The high-purity quartz sand with the aluminum content ranging from 10 ug / g to 16 ug / g is prepared by conducting surface aluminum doping on the quartz sand.

The application provides a magnesium alloy and a preparation method thereof, a magnesium alloy component and a preparation method thereof, and a vehicle, and belongs to the technical field of vehicle parts, and the magnesium alloy comprises the following components in percentage by mass: 8.9%-9.4% of an aluminum element, 0.5%-1.4% of a zinc element, 0.1%-1.0% of a gadolinium element, and 0.1%-1.0% of a yttrium element, and the balance is a magnesium element. The magnesium alloy provided by the embodiment of the application can have good tensile strength, yield strength and elongation by adopting the above-mentioned component formula, and meanwhile, the magnesium alloy has excellent corrosion resistance, and the application prospect of the magnesium alloy is improved.

The invention provides a semiconductor material and a semiconductor film sheet, and the semiconductor material can comprise scandium element, aluminum element and nitrogen element, and can be prepared through an ScAlMgO4 substrate. The content of scandium in the semiconductor material enables the semiconductor material to have a large piezoelectric coefficient. The similarity between the lattice constant of the substrate ScAlMgO4 crystal and the lattice constant of the semiconductor material containing the scandium element is high, the probability of crystal defects caused by scandium atoms in the semiconductor material prepared through the ScAlMgO4 substrate is small, and the thermal stability of the semiconductor material is good. The semiconductor material and the semiconductor film sheet provided by the invention can be widely used for preparing electronic components needing piezoelectric conversion, such as surface acoustic wave filters and bulk acoustic wave filters.

The invention relates to a continuous casting billet for a sulfur-resistant pipe and a preparation method thereof, and belongs to the technical field of preparation of continuous casting billets. In order to solve the problems that an existing continuous casting billet for the sulfur-resistant pipe is obvious in banded structure, the surface is sunken and cracked, the internal density is poor, and the control rate of aluminum element entering a furnace is low, the preparation method of the continuous casting billet for the sulfur-resistant pipe comprises the steps of converter primary smelting, refining treatment, vacuum treatment and continuous casting forming. Through converter, refining and vacuum whole-process cooperative regulation and control and matching with special refining slag, accurate control over molten steel components is achieved, component segregation and inclusion aggregation are eradicated, the banded structure of a formed blank pipe is smaller than or equal to 2.0 level, and the performance requirement of the sulfur-resistant pipe is met. By combining continuous casting process closed-loop regulation and control, the problem of peritectic steel surface depression is solved, the casting blank surface quality and the yield are greatly improved, the internal quality qualification rate of the casting blank reaches 100%, structural guarantee is provided for corrosion resistance of a sulfur-resistant pipe, and the method is suitable for severe working conditions of a high-acidity oil and gas field.

This invention provides a rare-earth aluminosilicate microcrystalline glass and its preparation method, belonging to the field of glass product technology. By introducing rare-earth elements and zirconium dioxide, this invention reduces the lithium and aluminum content in the glass, not only lowering production costs and enabling large-scale low-cost applications, but also endowing the microcrystalline glass with excellent mechanical and light transmittance properties. The results of the embodiments show that the rare-earth aluminosilicate microcrystalline glass provided by this invention contains only uniformly distributed zirconium dioxide nanocrystals, with an average crystal size ≤30nm. The visible light transmittance of the rare-earth aluminosilicate microcrystalline glass is greater than 90%; simultaneously, the surface compressive stress of the rare-earth aluminosilicate microcrystalline glass is ≥800MPa, and the Vickers hardness is >700kgf / mm². 2 The fracture toughness can reach 1.33–1.41 MPa·m. 1 / 2 .