16 results about "Niobium-titanium" patented technology

To provide a niobium titanium-based oxide that can achieve secondary batteries with high capacity and excellent rate characteristics.SOLUTION: According to one embodiment, a niobium titanium-based oxide is provided. The niobium titanium-based oxide satisfies formulae (1) to (3) in an L*a*b* color space as measured in accordance with Japanese Industrial Standards JIS Z8722: 2009: 95.0≤L*≤100 (1), -1.0≤a*≤1.0 (2) and -1.0≤b*≤6.0 (3).SELECTED DRAWING: Figure 1

The invention discloses a method for preparing a bulk phase-surface layer gradient doped niobium titanium oxygen negative electrode material by adopting a fused salt electrochemical method and application, and belongs to the field of negative electrode material preparation. The method comprises the following specific steps: preparing a niobium-titanium-oxygen sheet as a cathode; the method comprises the following steps: by taking a LiCl-KCl eutectic mixture as basic fused salt, sequentially adding a first group of dopants and a second group of dopants; in an inert atmosphere, electrolysis is firstly carried out at a relatively low voltage to reduce the first group of elements and diffuse to a bulk phase; electrolysis is carried out under high voltage, so that the second group of elements are reduced and enriched on the surface layer; and washing, drying and grinding the product to obtain the negative electrode material with component and functional gradients from a bulk phase to a surface layer. A continuous gradient structure with a bulk phase rich in high-conductivity elements and a surface layer rich in fast ion elements is constructed in a single particle. According to the structure, the intrinsic electron conductivity, the bulk phase ion diffusion rate and the interface ion migration kinetics of the material are synergistically improved, and the low-temperature fast charging performance, the rate capability and the cycling stability of the material serving as the negative electrode of the lithium ion battery are remarkably enhanced.

The invention discloses a filling wire for double-wire electric arc additive manufacturing of TaNbTiZrY refractory high-entropy alloy and a process method, and belongs to the technical field of additive manufacturing. The TaNbTiZrY refractory high-entropy alloy is manufactured through electric arc additive manufacturing of the cable type filling wire and the solid filling wire. The cable type filling wire is formed by twisting seven filling wires with the diameter of 0.6 mm, wherein the seven filling wires comprise three Nb wires, three Ti-Y alloy wires and one pure Zr wire, and the Ti-Y alloy wires comprise 97.5-99.5 wt.% of Ti, 0.5-2.5 wt.% of Y and one pure Zr wire. A pure Zr wire is used as a central wire, other six filling wires with the same components are arranged at intervals in a crossed mode on the periphery, the twisting speed is 4 m / s, and the lay length is set to be 10 mm. And the solid filling wire is a pure Ta wire with the diameter of 1.2 mm. The TA1 is used as a substrate, and high-efficiency, high-quality and low-cost preparation of the TaNbTiZrY refractory high-entropy alloy can be achieved by controlling parameters such as the wire feeding speed, the welding current and the interlayer cooling time.

The application relates to a preparation method of a niobium titanium oxide / liquid metal composite negative electrode material and application of the niobium titanium oxide / liquid metal composite negative electrode material in a low-temperature lithium ion battery, and belongs to the field of secondary batteries. The method is as follows: TiNb2O7 microspheres are synthesized, SnO2 is deposited on the surface of the TiNb2O7 by adopting an atomic layer deposition technology and taking SnCl4 and H2O as precursors, and TNO@Sn material is obtained through hydrogen reduction; TNO@Sn powder, Super P and PVDF are uniformly mixed in a solvent to prepare a slurry, the slurry is coated on a copper foil current collector, and an electrode sheet is obtained through rolling; Ga-In-Sn ternary eutectic liquid metal is prepared, the liquid metal is uniformly sprayed on the surface of the electrode sheet in an Ar atmosphere glove box, the Ga-In-Sn liquid metal / TiNb2O7 composite negative electrode is prepared in a "cold welding" mode, the interface bonding force between the liquid metal and the active particles is enhanced through an alloying reaction, the composite process temperature is reduced, and the damage of high temperature to the material is avoided. Meanwhile, the flowability, self-healing and high conductivity of the liquid metal compensate for and enhance the ion / electron transmission deficiency of the TiNb2O7 composite electrode at low temperature, and high safety is ensured.

To provide a niobium-titanium alloy having high plasticity.SOLUTION: The niobium-titanium alloys for superconducting applications in accordance with the standard specifications of ASTMB884 11 are characterized in that the measured values of the niobium-titanium alloys satisfy all the following conditions (1), (2) and (3): (1) Tensilestrength: 350MPa or less (2) Yieldstrength: 350MPa or less (3) Elongation (Relativeelongationatbase25mm): 21% or more SELECTED DRAWING: Figure 1

The application relates to a preparation method of fluorinated niobium-titanium oxygen hollow spheres and application of the fluorinated niobium-titanium oxygen hollow spheres in lithium ion batteries. The method comprises the following steps: preparing silica microspheres, preparing niobium-titanium oxygen hollow spheres by taking the prepared silica microspheres as templates. A niobium-titanium oxygen material (SiO2@TiNb2O7) loaded on microspherical titanium dioxide is prepared by a solvothermal method. Then, the SiO2@TiNb2O7 is dissolved in a hydrofluoric acid (30 wt%) solution, and is transferred into a reaction kettle to obtain fluorinated niobium-titanium oxygen hollow sphere materials. The preparation method realizes the fluorination of niobium-titanium oxygen and the preparation of hollow spheres by a one-step method. The hollow sphere structure improves the specific surface area, can bear a larger real current density, is favorable for the fast deintercalation of lithium ions, the fluorination improves the electronic conductivity of the niobium-titanium oxygen material, greatly improves the rate performance, and the fluorination can passivate the electrode surface, inhibit the occurrence of interface side reactions, and further inhibit the gas production behavior. The preparation method can be used in the field of high-power niobium-titanium oxygen-based lithium ion batteries.

This invention discloses a method for controlling the lamellar orientation of high-niobium titanium-aluminum alloys. The method involves coating the surface of the high-niobium titanium-aluminum alloy with boron nitride glass lubricant; wrapping the high-niobium titanium-aluminum alloy with pure nickel foil and encapsulating it in a metal sleeve; heating the high-niobium titanium-aluminum alloy extrusion billet assembly to the (α+β) two-phase region and holding it at that temperature; rolling-coating with boron nitride glass lubricant and then extruding and air-cooling to room temperature; reheating to the β single-phase region and holding it at that temperature; after holding at that temperature, slow cooling to the α single-phase region and holding it at that temperature; and finally, air-cooling to room temperature. This method significantly reduces the dependence on equipment, thereby greatly shortening the time required to control the lamellar orientation. This method can produce 5-8 high-niobium TiAl parts at a time, reducing the preparation time to 1 / 5 to 1 / 8. The method proposed in this invention not only fully utilizes the excellent hot working properties of high-niobium TiAl alloys but is also suitable for controlling the lamellar orientation of high-niobium TiAl alloys as wrought alloys.

The present application relates to a kind of short process preparation high melting point niobium titanium alloy ingot method, comprising the following steps: step S1.Provide pure titanium hollow electrode and niobium rod, wherein pure titanium hollow electrode is selected from the hollow electrode of titanium sponge, rolled titanium tube electrode or as-cast titanium ingot hollow electrode;Nioium rod is inserted into titanium electrode coaxially, and forms the composite electrode of assembly close, gap uniform;Step S2.The composite electrode is melted once by VAR, and the ingot is obtained;Step S3.The ingot obtained in step S2 is melted second time using EB furnace, and high melting point niobium titanium alloy ingot is obtained.The present application is accurate and reliable in component control, and the composition fluctuation caused by Ti volatilization and uneven melting speed in EB melting is fundamentally alleviated by VAR pre-alloying and pre-compensation of Ti evaporation amount, combined with the homogenization effect of double-sided reverse arrangement, so that the composition deviation of Nb and Ti in the ingot is stabilized within ±0.5%.

A display device includes: a wiring line on a first inorganic insulating layer; a second inorganic insulating layer covering the wiring line; and a display element on the second inorganic insulating layer, wherein the wiring line includes: a lower layer including at least one of aluminum (Al) or an aluminum (Al) alloy; an upper layer on the lower layer and including a niobium titanium (NbxTiy) alloy; and an intermediate layer arranged between the lower layer and the upper layer and including at least one of a niobium titanium aluminum (NbxTiy Alz) alloy or a titanium aluminum (TixAly) alloy.

The invention relates to the technical field of batteries, in particular to a negative plate, a preparation method thereof and a lithium ion battery. The negative plate comprises a negative current collector and active substance layers arranged on two sides of the negative current collector; and the particle size of the lower-layer active substance is larger than that of the upper-layer active substance. According to the niobium-titanium-oxygen negative electrode, the upper layer is small-particle-size niobium-titanium-oxygen so as to provide rapid interface reaction kinetics, and the lower layer is large-particle-size niobium-titanium-oxygen so as to ensure high compaction density and structural support. And finally, the normal-temperature ultrahigh-rate discharge performance of the battery is improved, the capacity of more than 90% can still be maintained at the rate of 20C-30C, and the performance is remarkably superior to that of a traditional single-layer structure.

A preparation method and application of a boron-doped niobium-titanium oxide material with flaky defects grown on carbon nanotubes (CNTs) belongs to the technical field of positive electrode materials for lithium-selenium batteries. The method comprises the following steps: dissolving a niobium source, a titanium source, and carbon nanotubes in an organic solvent, adding a surfactant, and then adding an alkali source. After liquid-phase mixing and stirring, the mixture is transferred to a reactor for reaction at a certain temperature and pressure to form a composite precursor; the precursor and the boron source are then placed in a tubular furnace and calcined at high temperature to obtain a boron-doped niobium-titanium oxide composite material with flaky defects grown on CNTs. This composite material is then reacted with selenium to produce a selenium- and boron-doped niobium-titanium oxide composite material with flaky defects grown on CNTs. This composite material, which is used as a positive electrode active material for lithium-selenium batteries, has a flaky structure, boron doping, and oxygen defects that significantly enhance the reactivity of the substrate plane, promote the formation and dissolution of Li2S, and improve the cycling and rate performance of lithium-selenium batteries.

The application discloses a core-shell structure titanium oxide solid solution material with strong absorption and wide range regulation LSPR effect and a preparation method and application thereof. The solid solution material is a core-shell structure with a fluorine-tungsten titanium oxide solid solution as a core and a fluorine-niobium titanium oxide solid solution as a shell. The fluorine-tungsten titanium oxide solid solution in the core is synthesized by an ammonia reaction of a core precursor and a tungsten source. The shell precursor and the niobium source are injected into the fluorine-tungsten titanium oxide solid solution, and after reaction at 280 DEG C-330 DEG C, the synthesis of the fluorine-niobium titanium oxide solid solution shell is realized and the shell is wrapped on the surface of the fluorine-tungsten titanium oxide solid solution core nanoparticles. The application utilizes the influence of the radial distribution of the dopant on the plasma performance, and the fluorine-tungsten titanium oxide solid solution and the fluorine-niobium titanium oxide solid solution with LSPR effect in the near-infrared and the mid-infrared are compounded, so that the solid solution has strong near-infrared absorption and wide range regulation function of the peak position, and has application value in the fields of preparation of transparent heat insulation coating, biological fluorescence imaging and the like.

The invention relates to a flexible superconducting circuit (1). The flexible superconducting circuit comprises a first foil of dielectric material (2), for example a polyimide; a first capping layer (3) comprising chromium (Cr); a first superconducting layer (4); and a second capping layer (5) comprising chromium (Cr). The superconducting layer can comprise niobium titanium or niobium titanium nitride. The first and second capping layer of chromium protects the superconducting layer against impurities dissolved in the polyimide and acts as an adhesion layer between the superconductor circuit and the polyimide due to chemical bonding.

The invention discloses a method for preparing a high-uniformity high-niobium titanium aluminum master alloy ingot through vacuum induction suspension smelting. According to the method, electromagnetic suspension smelting is utilized, and firstly, component homogenization of a melt is achieved through high-power strong Lorentz force stirring; in the solidification stage, two-stage stepped cooling of first rapid cooling and then slow cooling is adopted, in the liquid-solid two-phase zone stage, the heating power is linearly reduced to middle transition power at a high power attenuation rate, and then the heating power is switched to be linearly reduced to zero at a low power attenuation rate. The speed of high-speed cooling in the first stage is higher than the gravity settling speed of elements in a pasty area, so that the element components are more uniform; the low-speed cooling in the second stage effectively reduces the thermal stress gradient in the solid-state shrinkage stage, and stress cracking is prevented. According to the method, the problem that the component uniformity and the crack resistance of the high-niobium titanium-aluminum alloy are difficult to consider at the same time is solved, and the cast ingot which is uniform in component, fine in grain and free of macroscopic defects can be directly obtained.