103results about How to "Improve crystal structure" patented technology

The invention provides a sodium ferric pyrophosphate positive electrode material cooperatively doped with anions and cations, a preparation method of the sodium ferric pyrophosphate positive electrode material and a sodium ion battery, and relates to the field of sodium ion batteries. The anion and cation synergistically doped ferric sodium phosphate pyrophosphate positive electrode material comprises an inner core and a coating layer covering the outer surface of the inner core, the inner core comprises ferric sodium phosphate pyrophosphate, the coating layer comprises carbon, the chemical formula of the ferric sodium phosphate pyrophosphate is Na4-2yFe2.91-xQx (PO4) 2-yP2O7Fy, x is more than 0 and less than or equal to 0.3, and y is more than or equal to 0.03 and less than or equal to 0.08; q comprises at least one of Sn, Ni, Cu, Mg and Mn. The introduced Q positive ions and F negative ions can keep the crystal structure of the body material stable, and the positive ions and the negative ions have a synergistic effect, so that the band gap of the positive electrode material is reduced, the state density near the Fermi level of the positive electrode material is increased, the conductivity of the positive electrode material is enhanced, the specific capacity of the positive electrode material is improved, and the rate and the cycle performance are promoted.

The invention discloses a catalyst used for preparing acrylic acid and butyl ester by the dehydration of butyl lactate and a preparation method thereof. The catalyst is a composite catalyst, comprising a main catalyst A and auxiliary catalysts B, C, D and E, wherein, A is calcium sulphate, B is sulphuric acid, C is phosphate, D is alkaline matter and E is promoter. The preparation method comprises the steps as follows: five compositions A, B, C, D and E are sufficiently mixed, baked for 2-10 hours at the temperature of 200-800DEG C and formed for standby. The catalyst has high catalytic activation; under the catalysis of the catalyst, the molar yield reaches 75.1 percent and the molar selectivity of the acrylic acid and butyl ester reaches 71.5 percent. The preparation method has the advantages that the crystal structure of the main catalyst can be improved so as to be beneficial for carrying out the reaction; and the introduction of different auxiliary catalysts and quantities is helpful to improve the conversion ratio of the raw material and the product selectivity and is beneficial for improving the strength of the catalyst.

The invention provides a preparation method of a lithium iron phosphate material, a lithium ion battery and electric equipment, and relates to the technical field of batteries. The method comprises the following steps: mixing raw materials of an iron source, a lithium source and a phosphorus source with a reagent serving as a reducing agent and a carbon source, and grinding to obtain precursor powder; wherein the molar ratio of the lithium source to the iron source is 1.03-1.05, and the molar ratio of the iron source to the phosphorus source is 0.965-0.99; carrying out high-temperature treatment on the precursor powder in an inert atmosphere to obtain a lithium iron phosphate base material; and crushing the lithium iron phosphate base material to obtain the lithium iron phosphate material meeting the particle size requirement. The high-capacity and high-compaction lithium iron phosphate material is obtained by accurately controlling key indexes such as the iron-phosphorus ratio, the carbon content, the graphitization degree and the particle size and combining an optimized processing technology, so that the fast charging performance of a lithium ion battery is improved, and the effect of not reducing the electric quantity while the fast charging requirement is met is achieved.

The invention provides a preparation method of an iron phosphate material uniformly doped with a titanium element. The preparation method comprises the following steps: S1, respectively preparing a phosphoric acid solution, a phosphorus-oxygen mixed solution, a ferrous sulfate salt solution and a titanium salt solution; s2, adjusting the pH value of the ferrous sulfate salt solution to 1.0-2.5, adding the titanium salt solution and the phosphorus-oxygen mixed solution in a two-strand simultaneous adding manner, uniformly stirring, and reacting for 25-35 minutes at the temperature of 30-60 DEG C to obtain slurry A; s3, filtering and washing the slurry A to obtain a filter cake B; s4, adding water into the filter cake B, pulping, adding a phosphoric acid solution, heating, and preserving heat to obtain white slurry B; s5, filtering, washing and drying the white slurry B to obtain titanium-doped iron phosphate dihydrate, and calcining the iron phosphate dihydrate to obtain anhydrous iron phosphate; according to the invention, the crystal structure of the iron phosphate is improved by doping the titanium element, short-range preparation of the iron phosphate is realized, uniform doping of the element is ensured, the production period is shortened, and the complexity of the process is obviously reduced.

The invention provides a sodium ferric phosphate pyrophosphate composite material, a preparation method and application thereof, and a sodium ion battery, and relates to the technical field of positive electrode materials, the preparation method comprises the following steps: carrying out solid phase mixing on carbon-coated sodium ferric phosphate pyrophosphate and an organic carbon source, and then carrying out sintering treatment to obtain the sodium ferric phosphate pyrophosphate composite material; the temperature of the sintering treatment is 400-580 DEG C. The technical problems that in the prior art, according to a carbon source coating method, carbon source coating is not uniform, the porosity between materials is difficult to effectively reduce, the compaction performance of the materials cannot be remarkably improved, and the crystal structure of the materials is prone to change are solved, and the purposes of reducing the powder resistance of the materials and improving the compaction performance of the materials are achieved. The carbon coating uniformity is effectively improved, the porosity of the material is effectively reduced, the compaction performance of the material is remarkably improved, the water absorption of the material is reduced, and the crystal structure of the material is improved, so that the technical effect of comprehensively improving the performance of the material is achieved.

The invention relates to high-peptization pseudo-boehmite and a preparation method thereof, and belongs to the technical field of porous aluminum oxide preparation. The method comprises the following steps: obtaining slurry containing pseudo-boehmite colloidal particles; mixing the slurry containing the pseudo-boehmite colloidal particles with an alkaline auxiliary agent to obtain a mixed solution; and aging the mixed solution at a set temperature so as to enable the alkaline additive to perform surface modification on the pseudo-boehmite colloidal particles, thereby obtaining the high-peptizing-solubility pseudo-boehmite. According to the invention, the alkaline auxiliary agent acts on the colloidal particle surface of the pseudo-boehmite at a proper temperature, so that the pore structure of the pseudo-boehmite is maintained, and meanwhile, the pseudo-boehmite with high peptizing property is constructed.

The invention discloses a weather-resistant flame-retardant crosslinked polyethylene insulating material, a cable material and a preparation method. The weather-resistant flame-retardant crosslinked polyethylene insulating material comprises the following components in parts by mass: 60-70 parts of linear low-density polyethylene (LLDPE), 20-25 parts of low-density polyethylene (LDPE) and 15-20 parts of a copolymerization mixture, the copolymerization mixture is prepared from a styrene-ethylene / butylene-styrene block copolymer (SEBS) and styrene-ethylene / butylene-styrene block copolymer grafted maleic anhydride (SEBS-g-MAH). The cable material disclosed by the invention not only can give consideration to the flame-retardant characteristic and light aging resistance of a cable insulating material, but also can inhibit the damage of moisture to the insulating material under an alternating electric field, reduce the moisture entering the insulating material in a natural environment, and improve the water tree resistance of the material.

The invention belongs to the technical field of lithium ion batteries, and particularly discloses a lithium ion battery positive electrode material, a preparation method thereof and a lithium ion battery. The lithium ion battery positive electrode material comprises a lithium-rich manganese-based positive electrode material and F-doped ferric cobaltate coating at least part of the surface of the lithium-rich manganese-based positive electrode material, the chemical formula of the F-doped ferric cobaltate is FeCo2O4-0. 5xFx, and x is larger than or equal to 0.01 and smaller than or equal to 0.06. According to the lithium ion battery positive electrode material, the lithium-rich manganese-based positive electrode material is coated with FeCo2O4-0. 5xFx, the structural stability of the lithium-rich manganese-based positive electrode material can be effectively improved, the FeCo2O4-0. 5xFx coating layer has a high Fermi level and excellent conductivity, and the ionic conductivity of the lithium-rich manganese-based material can be effectively improved.

The invention relates to a method for recycling iron phosphate from lithium iron phosphate waste and application of the method, and belongs to the technical field of iron phosphate recycling. Comprising the following steps that firstly, the lithium iron phosphate waste, a reducing agent and sodium carbonate are mixed and roasted at the temperature of 820-890 DEG C, the reducing agent reacts with oxygen in the lithium iron phosphate waste, and Fe (II) easier to leach by acid is generated; subsequently, the roasted product is immersed in a mixed acid and ferrite solution, Fe < 2 + > is dissolved in a solution system through the mixed acid, insoluble iron phosphate precipitates are promoted to be formed, and therefore the Li < + > leaching rate of insoluble phosphate minerals in the roasted product can be increased. According to the method, a mixed acid solution is added, the pH value in an acid leaching system is limited to be 1.0-5.0, so that impurity components containing copper, manganese, aluminum, nickel and the like in a roasted product can be dissolved in the mixed acid solution, finally, an iron phosphate-containing solid obtained after solid-liquid separation is calcined, and comprehensive utilization of recovering lithium and iron phosphate from the lithium iron phosphate waste at the same time is achieved.

The invention relates to a positive electrode material precursor with a stable structure and a preparation method and application thereof.The preparation method comprises the following steps that a metal salt solution, ammonia water, a complexing agent solution and a precipitator solution are mixed in a base solution in a parallel flow mode, a co-precipitation reaction is conducted, and the positive electrode material precursor with the stable structure is obtained; a complexing agent in the complexing agent solution comprises ammonia water and organic acid, and the molar ratio of ammonium radicals in the ammonia water to carboxyl groups in the organic acid is (0.1-5): 1. According to the preparation method of the positive electrode material precursor provided by the invention, by using the specific complexing agent solution, the crystal face size of the obtained positive electrode material is adjusted, and the crystal structure of the obtained positive electrode material precursor is optimized, so that the crystal structure stability of the corresponding positive electrode material is improved.

The invention belongs to the technical field of a new energy material lithium ion battery positive electrode material, and particularly relates to a tungsten-niobium co-doped nickel-rich ternary positive electrode material and a preparation method thereof. According to the preparation method, a precursor subjected to tungsten-niobium mixed pretreatment is calcined to obtain the double-element co-doped nickel-rich ternary positive electrode material. Compared with an undoped sample and a single-element doped sample, the prepared co-doped sample can effectively enhance the structural stability of the material, reduce the polarization of an electrode and improve the diffusion kinetics of lithium ions, so that the cycling stability and the rate capability of the battery are improved at the same time.

The invention discloses a preparation method of a zinc-nickel alloy coating. A formula of a plating solution comprises zinc chloride, nickel sulfate hexahydrate, sodium hydroxide, sodium potassium tartrate tetrahydrate, trisodium citrate, potassium citrate, triethanolamine, tetraethylenepentamine, a primary brightener and a secondary brightener. A double-acid compound complexing agent is used for replacing a traditional single-acid complexing agent, and a plating layer can have a finer crystal structure by compounding a basic plating solution to electroplate a zinc-nickel alloy, so that the plating layer with more excellent corrosion resistance is obtained; the stability of metal ions in an electroplating solution is improved, the conductivity and uniformity of the electroplating solution are improved, the quality of a plating layer can be remarkably improved, the corrosion resistance and hardness of the plating layer are improved, pores in the plating layer are reduced, and the protection capability on a matrix is enhanced.

The invention relates to a salt lake lithium extraction titanium adsorption material and a preparation method thereof, and relates to the technical field of adsorption materials.The preparation method of the salt lake lithium extraction titanium adsorption material comprises the following steps that a titanium source and a lithium source are mixed and then subjected to first magnetic field sintering, and a first precursor is obtained; performing second magnetic field sintering on the first precursor to obtain a second precursor; performing third magnetic field sintering on the second precursor to obtain a third precursor; adding the third precursor into an acid solution for acidification, and then filtering and drying to obtain the titanium adsorption material for extracting lithium from the salt lake. According to the method, a three-section magnetic field sintering mode is adopted, the lithium element adsorption capacity and desorption rate of the obtained titanium system adsorption material are remarkably improved by controlling condition parameters of all stages, the efficient and stable titanium system adsorption material is provided for the field of salt lake lithium extraction, and the defects in the prior art are overcome.

The invention belongs to the technical field of sodium ion batteries, and discloses a preparation method of an ion-doped low-nickel layered oxide sodium ion battery positive electrode material. The chemical formula of the sodium ion battery positive electrode material is Na < 0.95-x > Ca < x > (Ni < 0.2 > Fe < 0.4 > Mn < 0.4 >) < 1-y-z > Li < y > Mg < z > O < 2 >. The preparation method comprises the following steps: weighing a sodium source, a nickel-iron-manganese hydroxide, a calcium source, a lithium source, a magnesium source and a certain amount of a dispersing agent in a ball-milling tank, and carrying out ball-milling mixing to obtain a sodium-ion battery positive electrode material precursor; and placing the sodium ion battery positive electrode material precursor in a corundum crucible, transferring the corundum crucible to a box-type atmosphere furnace for segmented sintering, naturally cooling to room temperature after sintering is completed, and grinding and sieving to obtain the ion-doped low-nickel layered oxide sodium ion battery positive electrode material. The positive electrode material has the advantages of low cost, low strain, high capacity, good cycle stability, simple preparation process, high repeatability and great potential of large-scale production.

The invention discloses a method for adding rare earth into a low-alloy high-strength steel crystallizer, which belongs to the technical field of application of rare earth in steel, and is mainly characterized in that rare earth is added in a manner of symmetrically feeding rare earth wires on two sides of a slab casting machine single-flow crystallizer by adopting a double-pipe wire feeder at a position which is 1 / 2 of the thickness and is 100mm away from a water gap in the width direction; the rare earth wires are 65% Ce-35% La mixed rare earth wires with the diameter being 2.5 mm and wrapped with iron sheets. According to the method for adding the rare earth into the low-alloy high-strength steel crystallizer, the liquid level of the crystallizer is stable in the whole wire feeding process, the storage amount of the rare earth in the steel is increased, water gap flocculation is avoided, the rare earth is evenly distributed on the whole section of a casting blank, the internal quality of the casting blank is improved, and reference can be provided for development of rare earth steel with the high storage amount of the rare earth.

The invention discloses a (002) crystal face oriented zinc powder negative electrode material as well as a preparation method and application thereof, and belongs to the technical field of secondary batteries. According to the preparation method disclosed by the invention, the zinc powder is adopted as a raw material, the optimization of the form and crystal face structure of the zinc powder is realized by controlling the processes of ball milling treatment and annealing treatment, and the (002) crystal face oriented zinc powder negative electrode material is formed through induction, so that the formation of zinc dendrites is effectively inhibited, and a more compact stacking morphology is presented; and compared with the traditional zinc foil negative electrode, the utilization rate of zinc is remarkably improved, and the energy density of the battery is favorably improved.

The invention discloses a silicon carbide ceramic material and a preparation method thereof, and relates to the technical field of ceramics. When the silicon carbide ceramic material is prepared, firstly, apricot shell carbon, nano silicon dioxide and sodium salt are mixed and calcined in a nitrogen atmosphere, and a modified silicon carbide composite nanowire is prepared; modifying the modified silicon carbide composite nanowire and praseodymium powder by a molten salt method to prepare a praseodymium modified silicon carbide composite nanowire; liquid polycarbosilane, the praseodymium modified silicon carbide composite nanowire, a modification additive, silicon carbide particles and a sintering additive are subjected to wet ball milling, mixing and curing, and then composite sintering powder is prepared; and sintering the composite sintered powder by a spark plasma sintering method, and then annealing in an argon atmosphere to prepare the silicon carbide ceramic material. The silicon carbide ceramic material prepared by the invention has the advantages of high thermal conductivity, electromagnetic shielding, high strength and high compactness.

The invention discloses a high-performance copper-nickel-tin alloy and a preparation process thereof, and relates to the technical field of alloy materials, and the high-performance copper-nickel-tin alloy comprises the following components in percentage by weight: 10%-14% of nickel, 4%-7% of tin, 0.2%-0.5% of beryllium, 0.6%-1.6% of iron, 0.4%-0.7% of zinc, 0.06%-0.22% of magnesium, 0.01%-0.04% of phosphorus, 0.07%-0.14% of rare earth element X and the balance of copper and inevitable impurities. The preparation process comprises the following steps: smelting: putting raw materials into a vacuum induction smelting furnace, vacuumizing to 0.003-0.008 Pa, filling argon until the pressure in the furnace is 0.03-0.04 MPa, gradually heating to 1200-1260 DEG C according to the heating rate of 11-15 DEG C / min, and keeping the temperature for 30-50 minutes to obtain an alloy melt; under the combined action of all the components, the mechanical property parameters of the copper-nickel-tin alloy are remarkably improved, and after rare earth elements lanthanum and yttrium are added, the tensile strength, the yield strength, the ductility and the hardness of the copper-nickel-tin alloy are remarkably improved.

The invention relates to the technical field of lithium battery positive electrode material preparation, in particular to coated doped type lithium manganese iron phosphate gradient temperature control preparation equipment and method.The equipment comprises five temperature control bins arranged side by side, a sintering bin, a vertical flow guide plate, a unique temperature control gas inlet assembly and the like work cooperatively, the temperature control gas inlet assembly can flexibly adjust the gas state, and the temperature control gas inlet assembly can control the temperature of the lithium manganese iron phosphate; the preparation method comprises the following steps: firstly, mixing a lithium source, a manganese source and the like with a specific composite carbon source, and performing spray drying to obtain precursor particles; according to the preparation method, the defects of a traditional preparation technology in the aspects of temperature control and coating forming are overcome, accurate gradient temperature control can be achieved, the temperature uniformity can be improved, the coating effect can be optimized, and the preparation method is suitable for industrial production. And the performance of the lithium manganese iron phosphate positive electrode material is remarkably improved.

This invention discloses an epitaxial wafer for a deep ultraviolet (UV) light-emitting diode (LED) and its fabrication method, relating to the field of semiconductor optoelectronic devices. The UV LED epitaxial wafer includes a substrate and a buffer layer, an N-type AlGaN layer, an active layer, an electron blocking layer, and a P-type AlGaN layer sequentially grown on the substrate. The active layer has a periodic structure, with each period comprising a sequentially stacked quantum well layer and a quantum barrier layer, and the number of periods in the active layer is ≥2. The quantum barrier layer comprises a sequentially stacked AlInGaN layer and a P-AlInGaN layer. Implementing this invention can effectively improve the luminous efficiency of deep ultraviolet LEDs.

The invention provides a production process of a high-wear-resistance and impact-resistance aramid fiber material, and relates to the technical field of material preparation, and the production process comprises the following steps: S1, raw material preparation: selecting a para-aramid fiber prepolymer, a hydroxylated boron nitride nanosheet, N-methyl pyrrolidone, a wear-resistance enhancer and an impact-resistance modifier according to a preset proportion, S2, mixing, S3, polymerization reaction, S5, extrusion molding, S6, extrusion molding, and S7, molding. Transferring the mixed system into a reaction kettle, introducing nitrogen for 35-55 minutes, and replacing air in the reaction kettle to form an aramid polymer; s4, molding processing: cooling the nylon polymer to room temperature, then putting the nylon polymer into spinning solution storage equipment, and winding the stretched fibers; s5, auxiliary treatment, wherein the wound fibers are washed with water and dried; according to the invention, the aramid polymer has a good crystal structure and high molecular weight, the wear resistance of the material is improved, the interface bonding force between the fiber and the matrix can be improved, and the impact resistance of the material is further improved.

The invention belongs to the technical field of battery materials, discloses a method for auxiliary recovery of a waste lithium battery negative electrode material by using a transition metal burning reducer, and designs a method for auxiliary recovery of a waste lithium battery negative electrode material by using a transition metal burning reducer. Transition metal salt ferrous sulfide and acid-leached graphite are mixed and subjected to heat treatment after the acid leaching process, the reaction activity of the graphite material is enhanced through the ferrous sulfide, and therefore the temperature needed by recovery of a waste graphite heat treatment crystal structure is reduced. The selected transition metal salt ferrous sulfide is low in cost. On the basis of the existing research, the sintering temperature is further reduced to 750 DEG C by adopting ferrous sulfide, and the regenerated graphite has a good crystal structure. The filtrate without sulfur and iron elements can be reused to regenerate iron metal and can also be reused to reduce burning. The whole experiment process is relatively simple, and the experiment repeatability is high.

A catalyst for coupling pyridine to prepare 2,2-bipyridine and a preparation method thereof, relates to the technical field of catalyst preparation. The catalyst takes nickel oxide as an active component, enhances the basicity of the catalyst surface by introducing an auxiliary element, loads the active component on alumina by a deposition precipitation method, and is prepared by kneading and extruding into a strip. The method is simple in preparation and low in cost. The obtained catalyst can make the conversion rate of pyridine reach 14.98% and above under low temperature reaction conditions of 110 DEG C, the selectivity of 2,2-bipyridine is as high as 80% and above, and the catalyst has good catalytic activity and application prospect.

The invention provides an analysis method for ultra-low acid-soluble aluminum in a cord steel ping-pong sample, and relates to the field of steel analysis. First, the cord steel ping-pong sample is annealed to refine the crystal structure and eliminate the structure heterogeneity. Secondly, a milling machine is used to remove the oxide layer on the surface of the sample. Then, carbides are refined by adding dilute nitric acid and dilute hydrochloric acid separately and adding deionized water intermittently during the sample dissolution process. A medium-speed quantitative filter paper and acid washing filtration method are used to reduce possible inclusions, thereby improving the stability and accuracy of the result. Finally, the best spectral line is selected on an inductively coupled plasma emission spectrometer to establish an analysis method for ultra-low acid-soluble aluminum in a cord steel ping-pong sample. The method can be used for detecting acid-soluble aluminum with a content of 0.0002% to 0.04% in cord steel, and solves the problem that there is no analysis method for ultra-low acid-soluble aluminum in steel in the prior art.

A highly efficient method for recycling waste crystalline silicon solar cells includes the following steps: S1, placing the waste crystalline silicon solar cells in a mixed solution of phosphate and ammonium fluoride to react, dissolving the aluminum back surface and initially etching the silicon nitride layer, causing the silver grid lines to detach, resulting in solid-liquid separation of the silver grid lines and a filter cake; S2, continuing to immerse the filter cake in the mixed solution from step S1 to completely etch the silicon nitride layer, obtaining a silicon wafer; S3, immersing the silicon wafer in a sodium hydroxide solution to remove the surface oxide layer, cleaning, and drying to obtain a high-purity silicon wafer. This invention achieves highly efficient separation of silver and aluminum grid lines from the silicon wafer and precise removal of silicon nitride and oxide layers through a stepwise chemical etching strategy, achieving a total silicon wafer recovery rate of over 96%. The process is short, simple to operate, and has low reagent costs, effectively solving the pollution problem of waste crystalline silicon solar cells, demonstrating significant environmental benefits and economic value, and is easy to scale up and apply.

The present application discloses a biodegradable composite lubricant, which relates to the technical field of lubricants. The raw materials of each component include by weight: 5 parts of modified wear-resistant material, 2 parts of multilayer graphene, 3.5 parts of additives, 12 parts of phosphoric acid, 17 parts of n-octadecyl alcohol, 35 parts of vegetable oil, 2.5 parts of oleic acid surfactant, 2 parts of antioxidant, 2.5 parts of extreme pressure agent, 1.5 parts of defoaming agent, 5 parts of viscosity regulator, and 18 parts of water; the modified wear-resistant material is an oil-soluble microsphere, which is made of silica-coated filler and has two layers, the inner filler includes silicon nitride and titanium diboride, and the mass ratio of silicon nitride to titanium diboride is 1:2; the outer layer is tetraethyl orthosilicate, and the porogens used in the inner and outer layers are different; the present invention stores more lubricating oil through a large pore structure, so that lubrication can be continuously provided during the friction process, and the lubricating effect and durability of the lubricating oil are further enhanced through the design of double-layer silica loading.

This invention discloses a method for preparing rare earth metals by electrolytic oxides using a fluoride system, belonging to the field of rare earth metal preparation technology. This invention modifies graphite anodes used in rare earth molten salt electrolysis. It improves oxidation and corrosion resistance, reduces anode wear, lowers replacement frequency, and increases production efficiency, yielding high-purity, low-carbon rare earth metal lanthanum. A three-dimensional network framework material is constructed using Prussian blue self-assembly and SiC is deposited to obtain a composite framework material. During pre-calcination with graphite and other materials, the derivatives optimize the crystal structure and interfacial bonding, enhancing the strength of the pre-shaped anode material and ensuring the integrity and performance stability of the electrode structure. Thirdly, the pre-shaped anode material is impregnated with a specific impregnation solution, altering the gas diffusion path and resistance, inhibiting oxidation reactions, and high-temperature sintering generates substances that fill the pores, forming a dense microstructure. Simultaneously, the compounds formed by phosphoric acid enhance cohesion and adhesion, improving oxidation and molten salt corrosion resistance, and extending the service life of the graphite anode.

The invention belongs to the technical field of gasification devices, and particularly relates to a two-stage gasification device for graphite regeneration and a two-stage gasification process thereof.The two-stage gasification device comprises a first-stage gasification device, a conveying device and a second-stage gasification device, a furnace tube is rotatably arranged in a first gasification furnace, and a first heater is arranged on the periphery of the inner wall of the first gasification furnace; the second-section gasification equipment comprises a second gasification furnace, a heating cavity is formed in the second gasification furnace, a furnace door is arranged at the upper end of the second gasification furnace, and a second heater is arranged in the heating cavity; according to the invention, through the first gasification furnace, the first heater and the rotatable furnace tube, moisture in the graphite obtained through aeration separation is dried, and organic impurities are removed, so that the graphite is subjected to secondary gasification, and the graphite is discharged from the furnace tube and is conveyed into the heating cavity of the second gasification furnace through the conveying equipment. Transmission equipment is arranged for cooling the graphite subjected to primary gasification, and redundant metal impurities in the graphite are further removed through a second gasification furnace and a second heater, so that the purity and the performance of the graphite are improved.

The invention relates to a nickel hydroxide-nickel molybdate nanotube supercapacitor electrode material and a preparation method and application thereof.According to the nickel hydroxide-nickel molybdate nanotube supercapacitor electrode material and the preparation method and application thereof, nickel molybdate nanotubes are synthesized through an electrostatic spinning technology, then a nickel hydroxide material and a nickel molybdate nanotube material are compounded through a water bath method, and the specific surface area of the material is greatly increased; the number of active sites is increased, the specific capacity and the stability of the material are further improved, and the energy density and the power density of a capacitor can be improved through the high specific surface area and an optimized electron transmission channel.

A 6000 series aluminum alloy medium and thick plate for spinning rims, the aluminum alloy raw material is composed of the following components in weight percentage: Si=0.45~0.75, Fe<0.65, Cu=0.25~0.35, Mn<0.10, Mg=0.95~1.15, Cr=0.15~0.30, Zn<0.20, Ti<0.10, the remainder is Al and inevitable impurities. The preparation process adopts precision heat treatment and rolling control technology to achieve the fine second phase and grain structure of aluminum from ingot to plate and strip. The finished aluminum alloy plate is 6~8mm thick, the grain size is ≤50μm, the second phase size is ≤10μm, the tensile strength is ≥100MPa, the yield strength is 35~90MPa, the elongation is ≥30%, and the rim surface prepared by spinning forming has no orange peel problem, which can better meet the technical requirements of aluminum for rims.