12 results about "Aluminium carbide" patented technology

The invention discloses a method for growing titanic acid / titanium dioxide nanoparticles on a titanium carbide Mxene sheet layer, and relates to a method for growing titanic acid / titanium dioxide nanoparticles on the surface of a titanium carbide Mxene sheet layer structure. The method comprises the following steps: firstly, etching titanium aluminum carbide at room temperature by adopting hydrofluoric acid to obtain a layered titanium carbide Mxene material, then dispersing the layered titanium carbide Mxene material in hydrogen peroxide with the mass percent concentration of 20-30%, simultaneously adding 0.6 ml of 65% nitric acid, and reacting for 24-72 hours at the temperature of 20-80 DEG C, so that titanic acid nanoparticles can grow on the surface of a titanium carbide Mxene lamellar structure; and subsequently carrying out heat treatment in an air atmosphere at 200-500 DEG C, and converting the titanic acid into anatase titanium dioxide. The preparation temperature is low without high pressure; the nanoparticles keep a lamellar structure aggregation state, and are expected to be applied to the fields of adsorption, photocatalysis and the like.

The present application relates to a composite current collector (10). [Solution] The composite current collector (10) includes: a base layer (1) having a first surface (11) and a second surface (12) arranged back to back along the thickness direction, the base layer (1) being made of a polymer material; a first modified layer (3) arranged on the first surface (11) of the base layer (1), the first modified layer (3) being made of one or more of silicon carbide oxide, titanium carbide oxide, and aluminum carbide oxide nanomaterials; and a first metal layer (2) arranged on the surface of the first modified layer (3) facing away from the base layer (1).

The invention discloses an integrally-formed carbon-free special-shaped foamed aluminum electrolytic capacitor anode and a preparation method thereof, and belongs to the technical field of electrolytic capacitor electrode materials. Spherical atomized pure aluminum powder is used as a base body and matched with a carbon-free pore forming agent and a carbon-free inorganic binder, a mold matched with a cavity is customized according to the installation space of target equipment, and the integrated special-shaped open-cell foamed aluminum anode with the solid welding area is prepared through layered powder laying and cold pressing forming, low-temperature curing and synchronous pore forming at the temperature of 180-250 DEG C, aftertreatment and global anodic oxidation. No carbon source is introduced in the whole process, aluminum carbide is prevented from being generated from the source, and the problems of capacitor swelling and internal resistance soaring pain points caused by carbon residues in the prior art are solved; excessive oxidation of the aluminum powder is avoided through low-temperature curing, integral forming is achieved without splicing, the device can adapt to any special-shaped installation space, and the space utilization rate is increased by 3-10 times; the effective specific surface area of the prepared anode reaches 500-800 times and is far better than that of a traditional corrosion aluminum foil, and the customized application requirement of a liquid / solid electrolytic capacitor is perfectly met.

The invention belongs to the technical field of aluminum ash detection, and discloses a device for measuring the content of metallic aluminum in aluminum ash, which comprises a nitrogen bottle, an ammonia gas absorption bottle, a double-elbow gas measuring pipe, a reaction bottle, a sample bottle, a leveling bottle, an electric furnace, a copper oxide pipe, a first gas guide pipe, a second gas guide pipe and a breather pipe, the breather pipe is provided with a first valve, a third valve, a fourth valve, a fifth valve and a sixth valve in sequence; the upper end of a spherical pipe of the double-elbow gas measuring pipe is connected with the breather pipe through a fifth valve, and the lower ends of a straight pipe and the spherical pipe of the double-elbow gas measuring pipe are connected with the leveling bottle through a seventh valve and an eighth valve respectively; one end of the copper oxide tube is connected with the third valve, and the other end of the copper oxide tube is connected with the fourth valve. Ammonia gas absorption and copper oxide reduction are achieved through valve switching, the hydrogen amount is obtained by measuring the volume, temperature and air pressure of gas in the device before and after copper oxide reduction through hydrogen, then the metal aluminum content in the aluminum ash is obtained, and the influence of aluminum nitride and aluminum carbide in the aluminum ash is effectively avoided.

A method and apparatus for detecting aluminum carbide content includes a right-angle tube I connected to a round-bottom flask via a rubber stopper I at its inlet. One end of the rubber tube I is connected to one port of a three-way valve, and the other two ports of the three-way valve are connected to rubber tubes II and III, respectively. The other end of the rubber tube II is connected to the gas inlet of a gas chromatograph. The other end of the rubber tube III is connected to the inlet of the right-angle tube II. The outlet of the right-angle tube II, a thermometer, and the inlet of the right-angle tube III are all embedded in the rubber stopper II and installed at the mouth of a specially designed measuring cylinder. The outlet of the right-angle tube III is connected to the inlet of the right-angle tube IV via a rubber tube IV. The outlet of the right-angle tube IV, along with a glass tube, is embedded in the rubber stopper III and installed at the mouth of a conical flask. By measuring the gas volume and composition sequentially through the three-way valve, the aluminum carbide content in the sample is determined using a function model. This allows for direct observation of changes during the detection process, effectively reducing operational errors and improving the accuracy of the detection results.

The invention relates to a combustion improver based on aluminum carbide waste salt and a preparation method thereof. The preparation method comprises the following steps: crushing the aluminum carbide waste salt, and then washing and drying by adopting a multi-stage countercurrent washing process; mixing the pretreated aluminum carbide waste salt with biomass charcoal powder, and then performing segmented carbonization modification in an inert atmosphere to obtain an aluminum carbide waste salt base material; adding a fluxing agent, a catalyst, a denitration auxiliary agent and a reducing agent into the aluminum carbide waste salt base material, uniformly stirring, and finally forming and post-treating to obtain the combustion improver based on the aluminum carbide waste salt. The technical problem to be solved is how to provide the preparation method of the combustion improver based on the aluminum carbide waste salt, and the technical problems that existing aluminum processing waste salt is difficult to dispose and wastes resources and a traditional combustion improver is high in cost, large in pollution and poor in combustion performance can be solved through a multi-stage process strategy of pretreatment impurity removal, carbonization modification and component compatibility. The harmless, recycling and high-value utilization of the waste salt is realized.

The present invention provides an aluminum carbide alloy filament and its manufacturing method, a heating device, and relates to the technical field of filament cathode materials. The aluminum carbide alloy filament includes a matrix (100) and a carbide layer (200) attached to the outer surface of the matrix (100). The carbide layer (200) has a grain width of 1.0 μm to 15.0 μm. The components of both the matrix (100) and the carbide layer (200) include tungsten, carbon, oxygen, and an M element, where the M element is one or a combination of elements selected from the group consisting of La, Y, Sc, Nd, Sm, Lu, Ce, Gd, Tb, Dy, Ho, Pr, Er, Tm, Yb, Eu, Hf, and Zr. The tungsten carbide alloy filament does not include thorium. This material improves the emission stability of tungsten alloy filaments and achieves the stable emission capability of conventional thorium-tungsten filaments without adding thorium, solving the problem of the relatively poor stable emission capability of existing thorium-free tungsten filaments and also eliminating the problem of radioactive contamination that occurs with conventional thorium-tungsten filaments.

The invention discloses an aluminum-based composite material with a gradient structure surface strengthening layer and a preparation method of the aluminum-based composite material. The aluminum-based composite material with the gradient structure surface strengthening layer comprises a composite material body and the gradient structure surface strengthening layer, wherein the composite material body is formed by a reinforcing body and a base body, and the gradient structure surface strengthening layer is generated on the surface of the composite material body in situ; wherein the reinforcement is carbide, and the matrix is pure aluminum or aluminum alloy; the gradient structure surface strengthening layer comprises an aluminum nitride and / or aluminum carbide strengthening layer, a nitrogen and / or carbon diffusion layer and a transition layer located between the aluminum nitride and / or aluminum carbide strengthening layer and the nitrogen and / or carbon diffusion layer. The carbide particles are introduced to serve as a reinforcing body, so that the overall hardness of the aluminum-based composite material is improved; the gradient structure surface strengthening layer is constructed on the surface of the composite material body in situ, so that the residual stress between the coating and the composite material body is obviously relieved, the bonding property of the coating and the composite material body is improved, and falling is prevented; and meanwhile, the gradient structure surface strengthening layer can further improve the hardness and wear resistance of the surface of the aluminum-based composite material.

The application belongs to the technical field of energy storage, and discloses a lithium-aluminum carbide-zinc composite lithium metal negative electrode and a preparation method and application thereof. A multi-phase alloy phase (Li single element, Al single element, LiZn alloy, Li3Al2 alloy and Li2C2) is formed by smelting of metal lithium, aluminum carbide and zinc single element. The lithium-aluminum carbide-zinc composite lithium metal negative electrode enhances the tensile strength and controls lithium stripping and deposition due to the presence of the LiZn alloy, the Li3Al2 alloy and the Al single element. The Li2C2 carbon-containing compound enhances the mechanical toughness of the composite lithium metal negative electrode. Compared with the existing pure lithium metal negative electrode, the lithium-aluminum carbide-zinc composite lithium metal negative electrode greatly improves the tensile strength, essentially improves the mechanical performance, and this characteristic inhibits the formation of lithium dendrites in the deep stripping and deposition process of lithium.

The invention discloses an aluminum / carbon nano composite material for lithium storage and a preparation method thereof, and belongs to the technical field of lithium ion battery negative electrode materials, an organic aluminum precursor solution and a carbon-based material are mixed in an inert atmosphere, and low-temperature thermal decomposition is carried out at 50-350 DEG C after a solvent is removed, so that nano aluminum particles are generated on the surface of carbon in situ by organic aluminum. According to the method, aluminum oxidation and aluminum carbide side reaction are effectively inhibited, and uniform dispersion of the aluminum nanoparticles in the carbon matrix is realized. The obtained composite material has a compact aluminum-carbon interface, and shows high reversible capacity, excellent cycling stability and good rate capability when being used as a lithium ion battery negative electrode. The method is simple in process, low in energy consumption and suitable for large-scale production.

The application discloses a preparation method of superfine aluminum-magnesium carbide composite powder, which comprises the following steps: mixing aluminum powder and graphite powder, and grinding the mixture into a first substance in which carbon is in aluminum in a ball mill; adding magnesium powder into the first substance and continuously ball milling to prepare a second substance; and annealing the second substance to obtain the superfine aluminum-magnesium carbide composite powder material. The preparation method solves the problems of the aluminum carbide particles, such as air absorption and poor interface with the magnesium matrix, and makes the aluminum carbide particles have good wettability with the magnesium liquid. The superfine aluminum-magnesium carbide composite powder material solves the problem of high surface energy of the nano particles and easy agglomeration, and makes the aluminum carbide more easily dispersed in the magnesium liquid, so that the mechanical properties of the magnesium alloy are greatly improved. In addition, the ball milling time required by the method is short, and the chemical reaction temperature of carbon and aluminum is low, so that the energy consumption and time consumption of the method are lower than those of the prior art, and the aluminum powder in which carbon is solid-solved is fully converted into aluminum carbide, and the superfine powder is formed.

This method uses carbon-containing refractories, including magnesia, as a starting material to produce recycled magnesia refractory raw materials in which aluminum carbide is removed while suppressing the formation of brucite, and graphite is removed while reducing energy consumption compared to conventional technologies. [Solution] A method for producing recycled magnesia refractory raw material, comprising a heating and pressurizing step of heating and pressurizing a carbon-containing refractory material containing magnesia in a steam atmosphere to obtain a treated material, and a graphite removal step of removing at least graphite particles from the treated material.