64 results about "Titanium ion" patented technology

The present application belongs to the field of petroleum chemical catalysis technology, and relates to a process for mass production of Ti-Beta zeolite based on local structure reconstruction method. The main technical features include: using water vapor assisted tetraethylammonium bromide template agent and alcohol amine weak organic base, and preparing Ti-Beta zeolite by local desilicon etching and repair reconstruction on the hydroxyl pit of dealuminated Beta zeolite. The benefits of the present application include: the combination of tetraethylammonium bromide template agent and alcohol amine weak organic base, and the limitation of the amount of silicate dissolved by the channel condensate liquid generated by dealuminated Beta zeolite and the liquid film on the surface of zeolite solid in saturated steam, which makes it easier to control the etching desilicon of the hydroxyl pit of dealuminated Beta zeolite and improves the receiving capacity of the hydroxyl pit to titanium ions with larger volume. The local structure defects generated by controllable etching desilicon can be directly repaired by using the quaternary ammonium cation provided by the TEABr template agent as a directing agent, so that the present application does not need to be assisted by fluoride or / and aluminum source.

The invention discloses a ferrous sulfate purification method and a ferrous sulfate purified product, and the method comprises the following steps: dissolving a titanium dioxide by-product in deionized water to obtain a ferrous sulfate saturated solution; under the condition that reducing gas is introduced into the ferrous sulfate saturated solution, mixing sodium sulfide with the ferrous sulfate saturated solution, and filtering to obtain a first purified solution; mixing sodium sulfide with the first purified solution, and filtering to obtain a second purified solution; and carrying out concentration crystallization on the second purified solution, and carrying out suction filtration and drying to obtain a ferrous sulfate purified product. Iron powder does not need to be added, oxidation of ferrous ions is inhibited through reducing gas, sodium sulfide is added in stages to enable impurities with high activity to react to generate sulfide precipitates, the sulfide precipitates are filtered, the content of impurities such as titanium ions, magnesium ions, manganese ions and calcium ions is greatly reduced, the impurity removal effect is good, and finally concentration and crystallization are conducted through solubility difference. The purification purity of the ferrous sulfate purified product is generally as high as 99% or above.

The invention relates to a high-purity ethylene production method and system. The production method comprises the following steps: S1, gasifying: pressurizing an industrial ethylene raw material and gasifying; s2, primary adsorption and purification: feeding the gasified industrial ethylene raw material gas into a primary adsorber for primary purification, and removing H2O, C2H2, CO2 and hydrocarbon impurities above C3 from the raw material gas through the primary adsorber; s3, secondary adsorption and purification: introducing the primarily purified ethylene gas subjected to primary adsorption and purification into a secondary adsorber, and carrying out adsorption-expansion desorption to obtain quasi-high-purity ethylene; s4, entering a multi-stage membrane filtration unit: enabling the quasi-high-purity ethylene subjected to secondary adsorption purification to sequentially penetrate through a plurality of membranes loaded with metal ions, so as to obtain high-purity ethylene; the metal ions are one or a mixture of more of silver ions, cobalt ions, copper ions and titanium ions. Compared with the prior art, the method provided by the invention has the advantages of short flow, low energy consumption, good separation effect, strong process continuity, high product purity and low impurity content, and can meet the production of high-purity ethylene above G5 requirements.

The invention relates to the technical field of semiconductor manufacturing, and discloses a titanium etching solution preparation process based on a hydrogen peroxide-monoethanolamine system.The titanium etching solution comprises, by mass, 5%-15% of hydrogen peroxide, 5%-15% of monoethanolamine, 5%-15% of sodium hydroxide and the balance water. 5%-10% of monoethanolamine; 2%-5% of tris (hydroxymethyl) aminomethane; 0.5% to 1.5% of 2, 2 '-dipyridyl; and 0.1%-0.5% of a double-effect stabilizing and indicating agent. Trihydroxymethyl aminomethane and 2, 2 '-dipyridyl cooperate to stabilize hydrogen peroxide, and a stable pH buffer system is constructed. The key double-effect stabilizing agent and the indicator (such as salicylic acid) can be subjected to complexing chromogenic reaction when the etching product titanium ions are accumulated to reach a threshold value, so that the self-indication function of solution failure is realized. The invention discloses a preparation process for dropwise adding hydrogen peroxide under cooling and temperature control conditions. The titanium etching solution disclosed by the invention has the beneficial effects of high chemical stability, good Ti / Cu etching selectivity and in-situ failure early warning function.

This invention relates to the field of water pollution remediation technology, specifically providing an iron-titanium co-loaded resin material, its preparation method, and its application. The preparation method of the iron-titanium co-loaded resin material includes the following steps: preparing an Fe-loaded resin intermediate by shaking and soaking a sulfonic acid-based cation exchange resin with an iron ion solution; preparing an iron-titanium composite modified resin intermediate by shaking and soaking the Fe-loaded resin intermediate with a titanium ion solution; and stirring the iron-titanium composite modified resin intermediate with a mixed treatment solution containing sodium persulfate and sodium hydroxide, washing until neutral, and drying to obtain a composite resin material co-loaded with iron oxide and titanium oxide. This iron-titanium co-loaded resin material can significantly reduce manganese ion concentration when applied to groundwater purification and can be used in in-situ groundwater remediation projects.

The invention provides a chemiluminescent composition and a dynamic coding device and method. The chemiluminescent composition comprises (i) a luminophor compound; (ii) a first metal ion selected from one or more of Mn < 2 + >, Co < 2 + >, Cr < 3 + >, Fe < 2 + >, Fe < 3 + >, Cu < 2 + >, Ni < 2 + >, Pb < 2 + >, Zn < 2 + >, Ru < 2 + >, Ce < 3 + >, Ag < + >, Pt < 2 + >, and any combination thereof; (iii) second metal ions selected from one or more of the group consisting of zirconium ions, molybdenum ions, titanium ions, vanadium ions, niobium ions, aluminum ions, and any combination thereof; (iv) an organic ligand; (v) a first co-reactant; (vi) a second co-reactant and (vii) a luminescence retarder. The chemiluminescent composition provided by the invention can be used for accurately controlling one or more of luminescence color / wavelength, luminescence starting time, luminescence duration and luminescence intensity, precise design can be carried out on the basis, and a novel chemiluminescent coding device and a novel chemiluminescent coding method which are high in sensitivity, high in information density, precise, anti-interference and anti-cracking are realized.

The present application relates to the technical field of inorganic non-metallic refractory material preparation, in particular to a homogeneous sintering process of high-calcium and low-iron dolomite sand for refractory; comprising the steps of preparing anhydrous homogeneous modified sol, light-burning dolomite grafting treatment, pre-sintering activation and isostatic pressing forming homogeneous sintering; the technical principle is to use organic multi-tooth chelating groups to ensure homogeneous distribution of tetravalent zirconium ion / tetravalent titanium ion precursor, to generate high-melting-point continuous network phase to wrap calcium oxide at high temperature in situ, and to combine with rare earth ion solid solution to produce lattice defects to reduce sintering activation energy; the present application overcomes the defects of physical addition of burn-promoting agents to reduce high-temperature performance and easy loss of surface coating, uses in-situ wrapping of grain boundaries and defect burn-promoting mechanism to solve the problems of difficult densification and easy hydration of the material, realizes high densification, and effectively improves the anti-hydration, anti-thermal shock and anti-slag erosion capacity.

The invention provides a doped sodium electric precursor as well as a preparation method and application thereof. The preparation method comprises the following steps that a nickel-manganese-iron mixed salt solution and doped metal salt are mixed, and a mixed solution is obtained; wherein doped metal ions in the doped metal salt comprise titanium ions, magnesium ions and zinc ions; and carrying out spray pyrolysis on the mixed solution to obtain the doped sodium electric precursor. The preparation method provided by the invention is simple in process, the doped sodium electric precursor with the characteristics of high entropy effect and the like can be directly prepared through one-step spray pyrolysis, the efficiency is high, the energy consumption is low, and the cost advantage is obvious; in addition, the process route also realizes uniform atomic-scale doping of various elements. The sodium ion layered oxide positive electrode material prepared based on the method is uniform in component and stable in structure, and the rate capability and the cycling stability of the sodium ion layered oxide positive electrode material are remarkably improved.

The invention relates to the technical field of electroplating, and particularly discloses a cyanide-free gold electroplating solution as well as a preparation method and application thereof. The cyanide-free electrogilding plating solution comprises soluble gold salt, a first complexing agent, a second complexing agent, a buffering agent, a brightening agent, a wetting agent, a titanium ion chelating agent, an antioxidant, conducting salt and the balance deionized water. The first complexing agent is ethylene diamine tetraacetic acid disodium salt; the preparation raw materials of the second complexing agent comprise an aza-macrocyclic complex and sodium hydroxide, and the mass ratio of the aza-macrocyclic complex to the sodium hydroxide is 1: (1-2). The stability of the plating solution can be improved, and a plating layer with fine crystal nucleus and a compact structure can be formed, so that the protection performance and the appearance of the plating layer are improved.

The application relates to an antibacterial agent and a preparation method thereof, a powder coating, a product with antibacterial function and a preparation method thereof. The antibacterial agent comprises an inorganic carrier and silver ions, copper ions and third metal ions supported on the inorganic carrier; the third metal ions comprise one or more of nickel ions, titanium ions, manganese ions and zinc ions; the content of the silver ions is greater than the content of the copper ions and greater than the content of the third metal ions. In the antibacterial agent, the silver ions play a main antibacterial role, the copper ions are used for reducing the silver ions, the state of the silver ions is protected, the third metal ions increase the number of additional exchangeable cations, the release speed of the silver ions is delayed, and the copper ions are matched to improve the durability of the antibacterial effect of the silver ions.

The invention provides a preparation method and application of a mesoporous material Ce / Ti-UiO-66-NH2, and the preparation method comprises the following steps: 1) mixing a certain amount of template agent, ceric ammonium nitrate, terephthalic acid, TMB, acetic acid and sodium perchlorate, dissolving in deionized water, and reacting to obtain Ce-UiO-66; (2) adding a certain amount of tetrabutyl titanate into a N, N-dimethylformamide solution containing Ce-UiO-66, and carrying out hydrothermal reaction, so as to obtain a Ce / Ti-UiO-66 solid; and (3) carrying out ultrasonic treatment on a certain amount of 2-aminoterephthalic acid and the Ce / Ti-UiO-66 solid in a methanol solution to obtain a Ce / Ti-UiO-66-NH2 solid. According to the method, simple and convenient synthesis of mesoporous Ce-UiO-66 can be achieved, the problem that in the prior art, a mesoporous Ce-UiO-66 synthesis method is difficult is solved, the metal titanium ion-doped and amino-loaded Ce / Ti-UiO-66-NH2 mesoporous material is prepared, and meanwhile, a new material is provided for the fields of photocatalysis and the like.

The application provides a preparation method of an oxygen-containing organic compound adsorbent. The method comprises the following steps: introducing a coupling agent, copper ions and titanium ions into 13X molecular sieves to obtain the oxygen-containing organic compound adsorbent, and the preparation method of the 13X molecular sieves comprises the following steps: mixing an aluminum source and a silicon source with water to obtain an aluminum-containing material and a silicon-containing material; mixing the two materials and sequentially performing stirring, pH value adjustment and crystallization treatment to obtain a crystallization product; performing aluminum dissolution and silicon dissolution treatment on the molecular sieve-containing material, mixing the obtained aluminum-rich liquid and silicon-rich liquid to obtain a gel-like mother liquor; mixing the crystallization product and the gel-like mother liquor and performing aging, hydrothermal crystallization, filtration, washing and drying to obtain the 13X molecular sieves; and the molecular sieve-containing material is selected from any one or more of the following: waste ZSM-5 molecular sieve catalyst, waste molecular sieve adsorbent or waste VOCs adsorbent. The oxygen-containing organic compound overcomes the problem of low adsorption efficiency of the oxygen-containing organic compound in the prior art, and has high application value.

The present application relates to the technical field of inorganic non-metallic refractory material preparation, in particular to a homogeneous sintering process of high-calcium and low-iron dolomite sand for refractory; comprising the steps of preparing anhydrous homogeneous modified sol, light-burning dolomite grafting treatment, pre-sintering activation and isostatic pressing forming homogeneous sintering; the technical principle is to use organic multi-tooth chelating groups to ensure homogeneous distribution of tetravalent zirconium ion / tetravalent titanium ion precursor, to generate high-melting-point continuous network phase to wrap calcium oxide at high temperature in situ, and to combine with rare earth ion solid solution to produce lattice defects to reduce sintering activation energy; the present application overcomes the defects of physical addition of burn-promoting agents to reduce high-temperature performance and easy loss of surface coating, uses in-situ wrapping of grain boundaries and defect burn-promoting mechanism to solve the problems of difficult densification and easy hydration of the material, realizes high densification, and effectively improves the anti-hydration, anti-thermal shock and anti-slag erosion capacity.

This invention belongs to the technical field of battery material analysis, and discloses a sample digestion method for determining the titanium content in carbon-coated lithium iron phosphate and a method for determining the titanium content therein. The sample digestion method provided by this invention uses concentrated sulfuric acid, perchloric acid, and ammonium sulfate as the first digestion reagents. The carbon-degradation-oxidation-decomposition of carbon-coated lithium iron phosphate is achieved at a high temperature of 200℃~350℃. Concentrated hydrochloric acid is used as the second digestion reagent to achieve complexation-stabilization of titanium ions, thereby achieving complete digestion of carbon-coated lithium iron phosphate. This yields a clear, transparent digestion solution with stable titanium ions, which can be directly used for quantitative analysis of titanium. This method has the advantages of simple operation, short processing time, and high processing efficiency, and has excellent application prospects for accurate and industrialized batch detection of titanium content in this complex matrix battery material, carbon-coated lithium iron phosphate.

The invention belongs to the technical field of energy-saving films, and particularly relates to an energy-saving film, a preparation method thereof and application of the energy-saving film in hollow energy-saving glass. Tetrabutyl titanate is hydrolyzed through a gel method to form niobium-doped titanium gel, the niobium-doped titanium gel is calcined to form modified nano titanium dioxide, bismuth tungstate is loaded to the surface of the modified nano titanium dioxide to prepare the nano thermal insulation material, niobium is doped to replace titanium ions to initiate lattice distortion, bismuth tungstate is loaded to the surface of the modified nano titanium dioxide to form a heterojunction, and the nano thermal insulation material is prepared. The plasma resonance effect is improved by locally improving free electrons, and the near-infrared light blocking performance of the energy-saving film is further improved; the modified acrylic resin has excellent weather resistance, so that the transparent thermal insulation material is uniformly dispersed; the metal functional film is compounded in the transparent conductive oxide, so that the energy-saving film can maintain high visible light transmittance and generate a strong reflection effect on near-infrared electromagnetic waves, and the prepared energy-saving film is suitable for an environment needing high shading and heat insulation.

A lithium titanium composite oxide including aluminum-coated primary particles and a method for manufacturing the same are disclosed. A lithium titanium composite oxide including aluminum-coated primary particles according to an embodiment is manufactured by coating lithium titanium oxide primary particles with aluminum by mixing an aluminum compound with re-pulverized particles and then by spray-drying the mixture again to prepare secondary particles. A battery including the lithium titanium composite oxide including the aluminum-coated primary particles exhibits effects of suppressing electrolyte decomposition and gas generation that may be respectively caused by titanium ions and residual lithium in conventional lithium titanium composite oxides.

The invention relates to a manganese-based-hydrogen flow battery system, in particular to a manganese-based-hydrogen flow battery system based on a titanium halide salt composite additive. The core problems of MnO2 precipitation and accumulation, oxygen evolution side reaction and short cycle life in the manganese-based battery are solved through multi-mechanism collaborative innovation; according to the system, the manganese-based acidic electrolyte is adopted, and the electrochemical stability and the energy density are remarkably improved through the collaborative design of the titanium halide salt composite additive and the hydrogen electrode; titanium ions inhibit the disproportionation reaction of Mn < 3 + > by forming a physical barrier, complexing stability and an electronic regulation and control mechanism, meanwhile, a halogen redox mediator realizes Mn valence state dynamic balance through reversible redox circulation, chemical regeneration of MnO2 and efficient circulation of soluble Mn < 2 + > are promoted, and irreversible loss of active substances caused by irreversible precipitation of MnO2 is effectively inhibited; according to the invention, a technical path with economical efficiency, safety and sustainability is provided for large-scale energy storage, and the method is suitable for power grid level peak regulation and renewable energy consumption.

The invention discloses a fiber ceramic-based catalytic filter element for denitration of industrial flue gas and a preparation method of the fiber ceramic-based catalytic filter element, and belongs to the technical field of catalytic filter elements. According to the preparation method, firstly, a chelating agent is introduced in the preparation process of TiO2 sol to improve the dispersity and particle size uniformity of TiO2 nanoparticles, the chelating agent can effectively adjust the hydrolysis rate of butyl titanate by means of the strong coordination acting force of the chelating agent and titanium ions, and high-dispersity and small-particle-size TiO2 sol is constructed; then, the fiber ceramic base material is immersed in the TiO2 sol, a firm TiO2 coating is formed after calcination, the firm TiO2 coating serves as a carrier with a high specific surface area, and the binding force between the firm TiO2 coating and the base material is enhanced; the preparation method comprises the following steps: firstly, preparing a TiO2 coating, then dipping a solution containing vanadium and tungsten precursors onto the composite carrier, and calcining to form a main active component V2O5 and a cocatalyst WO3 which are highly dispersed on the surface of the TiO2 coating to form selective catalytic reduction active sites, thereby finally obtaining the fiber ceramic-based catalytic filter element which is good in blocking resistance, water-resistant, sulfur-resistant and high-temperature-resistant and can be used for industrial flue gas denitration.

The invention provides a niobium-titanium co-doped lithium vanadium fluorophosphate positive electrode material as well as a preparation method and application thereof. The chemical general formula of the niobium-titanium co-doped lithium vanadium fluorophosphate positive electrode material is LiV < 1-a-b > Nb Ti PO < 4 > F / C, wherein a is the doping molar weight, 0 lt, of the Nb element; a < = 0.05; b is the doping molar weight of the Ti element, 0 lt; b < = 0.05; the content of carbon in the niobium and titanium co-doped lithium vanadium fluorophosphate positive electrode material is 1.5-2.0 wt%. According to the niobium-titanium co-doped lithium vanadium fluorophosphate positive electrode material, niobium (Nb) and titanium (Ti) ions are co-doped, so that the electronic conductivity, the lithium ion diffusion rate and the cycle structure stability of the material are remarkably improved. The niobium-titanium co-doped lithium vanadium fluorophosphate positive electrode material disclosed by the invention has good application prospects and large-scale popularization potential in the field of positive electrode plates of lithium ion batteries.

The present invention provides a high-temperature lead-free piezoelectric ceramic material with a chemical composition of Bi 4‑x A x Ti 2.97 (B1 1 / 3 B2 2 / 3 ) 0.03 O 12 , where 0 < x < 0.08. Here, A is a doping element of a near-Bi 3+ radius metal cation, B1 is a doping element of a low-valence metal cation, B2 is a doping element of a high-valence metal cation, and B1 and B2 form an unequal valence doping of high-valence and low-valence metal cations. The present invention uses A / B-site composite doping to replace the A-site bismuth ions and B-site titanium ions in Bi4Ti3O 12 . A near-Bi 3+ [[ID= twenty]] radius metal cation element is used for A-site doping, and at the same time, B1 element and B2 element are used for B-site unequal valence doping, so as to achieve the effect of improving piezoelectric properties while maintaining a high Curie temperature. The present invention also provides a preparation method for the high-temperature lead-free piezoelectric ceramic material.

This invention discloses a piezoelectric ceramic and its application. The piezoelectric ceramic uses barium titanate as a matrix and significantly improves piezoelectric performance and thermal stability by replacing some titanium ions with zirconium and tin ions. The piezoelectric ceramic adopts a lead-free formula, which is in line with the development trend of green and environmentally friendly products.

The present invention is a dental care solution and manufacturing method thereof. By using silver nanoparticles and mixing zinc ions, titanium ions, or silicon ions to improve the dental care solution stability, the present invention has antibacterial effect and effectively assists preventing tooth decay.

The application discloses a kind of light response nanoenzyme array sensor and its preparation method and application, belong to neurotransmitter detection technical field.The kind of light response nanoenzyme array sensor, including MOF1, MOF2 and MOF3, the organic ligand of MOF1, MOF2 and MOF3 are all ZnTCPP, and metal ions are zinc ion, titanium ion and aluminum ion respectively.Besides the larger specific surface area of MOFs, the interaction of reaction substrate and catalytic active site in material is enhanced, the response sensitivity of sensor is significantly improved, and its light response characteristics can be regulated by light catalytic activity, realize the dynamic signal amplification of neurotransmitter.The array sensor can detect various neurotransmitters, realize accurate distinction and quantification within a few minutes.Even in complex biological samples, the light response nanoenzyme array sensor can still maintain high precision.

This invention provides a supercrystalline composite ion nitriding anti-corrosion metal pot, belonging to the technical field of metal pots. It includes a metal pot body and a handle connected to the pot body, with a detachable connection between them. The metal pot body includes a metal substrate layer. At least a portion of the outer and inner surfaces of the metal substrate layer are provided with a honeycomb structure layer obtained by plasma etching. A supercrystalline composite ion wear-resistant protective layer is provided on the honeycomb structure layer. This supercrystalline composite ion wear-resistant protective layer is formed by nitrogen atoms and titanium atoms penetrating into the pot surface and diffusing inwards. This invention reduces light cooking wear, extends the lifespan of the pot, and the integration of titanium ions into the crystal lattice optimizes the structure, enhances resistance to external forces, forms a corrosion-resistant barrier, resists water vapor, salt, and acid / alkali corrosion, ensures food safety and cooking stability, and significantly improves the performance of the pot, thus possessing certain practical value.

The invention provides a method for detecting a passivation film structure on the surface of a corrosion-resistant titanium alloy, which comprises the following steps of: performing X-ray photoelectron spectroscopy test on a sample by a method of changing energy, performing at least twice test to obtain a full spectrum and a spectrum of Ti, O and C, performing charge correction on the peak position of the C element, and performing peak-dividing fitting by adopting an element high-resolution spectrum to obtain the passivation film structure on the surface of the corrosion-resistant titanium alloy. And when the processed result meets the condition that only the photoelectron signal of the passive film is received at least once and the photoelectron signal from the titanium alloy matrix is received at least once in the test, outputting the structure of the passive film on the surface of the sample according to the signal intensity in the data processing and analysis result. Ion etching sputtering is not used in the XPS test process, the illusion generated by titanium ion reduction caused by argon ion etching in a conventional XPS etching-layer-by-layer stripping method is avoided, data obtained through analysis are more accurate, the detection method is a nondestructive detection method, no damage is caused to a film layer, and the detection accuracy is improved. And the accuracy of the detection result is further improved.

The invention provides application of titanium ions in promoting accumulation of tanshinone IIA and / or salvianolic acid components of salvia miltiorrhiza, and belongs to the technical field of hairy root induction. The invention provides application of titanium ions in improving and / or promoting accumulation of salvia miltiorrhiza tanshinone IIA and / or salvianolic acid components. According to the method, hairy roots of salvia miltiorrhiza are induced by using different titanium ion concentrations, and the influence of titanium ions on quality components of salvia miltiorrhiza is researched. The result of the embodiment shows that 2-10 [mu] mol / L of titanium ions are added in the salvia miltiorrhiza hairy root induction process, accumulation of tanshinone IIA and salvianolic acid components in salvia miltiorrhiza hairy roots can be improved and promoted, and then the quality components of salvia miltiorrhiza can be improved. Through the influence of titanium ions on the quality components of the salvia miltiorrhiza, a theoretical basis is provided for improving the quality of the salvia miltiorrhiza and developing a titanium fertilizer.

The invention provides a non-stick cooker and a manufacturing method thereof. The non-stick cooker comprises a cooker base body and an amorphous state ferrotitanium composite metal oxide layer, the amorphous state ferrotitanium composite metal oxide layer is formed on the cooker base body, the amorphous state ferrotitanium composite metal oxide layer is formed by particle flow compounding of metal ions and oxygen ions, and the metal ions and the oxygen ions are not contained in the amorphous state ferrotitanium composite metal oxide layer. The metal ions at least comprise titanium ions with different valence states and iron ions with different valence states.

The application discloses a lithium iron phosphate precursor and a preparation method and application thereof, and belongs to the technical field of lithium battery materials. Iron phosphate, lithium carbonate, a carbon source, a dispersing agent, titanium dioxide and water are mixed into a slurry; the slurry is ground at a temperature of less than or equal to 50 DEG C until the D50 is less than or equal to 0.6 microns; and the ground slurry is spray dried to obtain the lithium iron phosphate precursor. Through mutual cooperation of monosaccharide, polysaccharide and titanium ions, the performance of the lithium battery is improved. Compared with a single metal doping or carbon source coating method, the method has more advantages in terms of discharge specific capacity, initial coulombic efficiency and other performances of the lithium battery. The method reduces the particle size requirement, pressure and other indexes, shortens the reaction time, reduces the production intensity, thereby reducing the production cost and increasing the market competitiveness of the product.

The invention relates to the field of clothing accessories, in particular to a preparation method of low-magnetism metal zipper teeth. The preparation method provided by the invention comprises the following steps: mixing Fe-based alloy powder and Y2O3 nanoparticles to obtain pre-alloyed powder; then the pre-alloyed powder is prepared into spherical powder through a plasma rotating electrode atomization method; preparing the spherical powder into a zipper tooth blank through a selective laser melting process; then the zipper tooth blank is sequentially subjected to pulsed magnetic field treatment and microwave rapid annealing treatment, and annealed zipper teeth are obtained; and finally, titanium nitride ion beams are used for conducting surface modification treatment on the annealed zipper teeth, an amorphous-nanocrystalline composite layer is formed on the surfaces of the annealed zipper teeth, and the zipper teeth are obtained. The phase change suppression and magnetic field compensation synergistic process is adopted, the powder metallurgy pre-alloying technology and the pulsed magnetic field annealing technology are originally fused, the magnetic anisotropy field, the resistivity and the friction coefficient can be effectively reduced, and the grain refining effect and the tensile strength can be improved.