12 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 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.

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.