11 results about "Metal boride" patented technology

Disclosed herein are compounds, methods, and tools which comprise tungsten borides and mixed transition metal borides.

The application provides a preparation method of high-purity superfine diboride powder and relates to the field of metal borides. The preparation method comprises the following steps: introducing BCl3 and H2 into a vacuum environment to obtain a mixed gas; mixing the mixed gas and metal wires and performing electric explosion treatment to obtain a reaction powder; and performing passivation ball milling treatment on the reaction powder in a mixed atmosphere of argon and oxygen to obtain the high-purity superfine diboride powder; and the metal wires comprise at least one of titanium wires, magnesium wires and aluminum wires. The method does not introduce by-products and impurities in the whole process, the obtained diboride powder is small in particle size, uniform in distribution and free of agglomeration, the preparation method is short in process and high in efficiency, and the method has a good industrialization prospect.

The application provides a method for preparing boronene by vacuum thermal decomposition, which comprises the following steps: ball milling a metal boride block in an inert atmosphere to obtain a metal boride powder; tabletting the metal boride powder to obtain a metal boride flake; vacuum thermal decomposition of the metal boride flake in a vacuum reaction environment; solid-liquid separation of the obtained product after mixing with water to obtain a solid; washing the solid with an acidic solution until neutralization; and freeze-drying to obtain boronene; wherein the metal boride comprises MgB2 and / or AlB2. The method has a low vacuum thermal decomposition temperature, low preparation cost and high production efficiency. The preparation method occurs in a closed vacuum environment, and there is no secondary oxidation problem of raw materials and products, no solid impurity pollution, and the method is green and safe. The prepared boronene has high purity, high yield and uniform size.

The invention belongs to the technical field of water electrolysis, and discloses an oxygen evolution catalyst, a preparation method thereof, an electrode and a water electrolysis device. The oxygen evolution catalyst comprises a metal boride and a noble metal oxide, the noble metal oxide is loaded on the metal boride, and the specific surface area of the metal boride is 79m < 2 > / g-90m < 2 > / g. The oxygen evolution catalyst provided by the invention has excellent catalytic activity and stability.

This invention relates to the field of surface coating materials technology, and in particular to a wear-resistant transition metal boride coating and its application. The wear-resistant transition metal boride coating is prepared by the following steps: (1) placing a clean and dry substrate on a magnetron sputtering deposition site, placing an HfB2 target on an RF target site, and a TiB2 target on a DC target site; then evacuating and heating the equipment chamber, and then introducing Ar gas as the working gas; (2) controlling the atomic ratio of Hf to Ti by adjusting the sputtering power ratio of HfB2 and TiB2 targets to form a (Ti) composite with adjustable composition. 1‑x ,Hf x The B2 coating was deposited at a controlled temperature of 300~600 ℃. The (Ti) coating developed in this invention... 1‑x ,Hf x The B2 coating has advantages such as high hardness, excellent friction performance and wear resistance, and has broad application prospects. It is especially suitable for use as a protective coating for cutting tools.

This invention relates to the field of metal boride preparation, and discloses a method for efficiently preparing metal borides using a modified microwave oven apparatus. The method includes the following steps: mixing boron-containing raw materials with metal-containing raw materials to obtain a precursor mixture; placing the precursor mixture in a reaction vessel; placing the reaction vessel in a household microwave oven and starting the microwave oven for a microwave reaction of 3-30 minutes; and post-processing the reaction product to obtain the metal boride. This invention provides a method for efficiently preparing metal borides using a modified microwave oven apparatus. By utilizing the rapid heating characteristic of graphite powder absorbing microwaves, the reaction can be completed within 3-30 minutes, significantly improving the preparation efficiency compared to traditional high-temperature synthesis methods. Furthermore, by employing a vacuum microwave reaction combined with NaCl / KCl flux, only simple washing is required after the reaction to obtain a high-purity product, eliminating the need for acid etching and multiple centrifugal washing processes, thus significantly simplifying the process.

The application discloses application of two-dimensional transition metal boride in a saturable absorber and a laser, and the two-dimensional transition metal boride is Mo 4 / 3 B 2‑x T z The application builds a fiber laser based on two-dimensional Mo 4 / 3 B 2‑x T z , optimizes Mo 4 / 3 B 2‑ x T z saturable absorber and a cavity structure of the fiber laser, and after adjusting pump power and a polarization state in the cavity, self-starting of ultrashort and high-repetition-rate mode-locked pulses is realized.

The application belongs to the technical field of superconducting materials, and discloses a high-performance MgB2 superconducting wire and a preparation method thereof. The method comprises the following steps: firstly, uniformly mixing nano-Mg alloy powder and B powder in an inert gas atmosphere according to an atomic number ratio of Mg:B=1:2; secondly, compounding a high-purity Nb rod, a CuNi alloy tube and an oxygen-free Cu tube into an Nb / CuNi / Cu alloy rod, processing deep holes, and then making a single-core wire by loading the mixed powder; thirdly, assembling the single-core wire into a Monel alloy tube, processing into a multi-core composite wire, and obtaining the high-performance MgB2 superconducting wire through high-temperature phase formation heat treatment. The metal elements in the nano-Mg alloy powder can generate metal borides, and the CuNi alloy has both constraint and barrier effects, so that the MgB2 grains of the wire are refined, the connectivity between the grains is improved, and the current-carrying performance is improved.

The present invention relates to a data carrier comprising a plastics substrate having first and second opposite surfaces and a thickness of at most 500 µm, wherein the first surface of the substrate is coated with a first coating, the material of the first coating being different from the material of the substrate, wherein the first coating comprises a plurality of laser-ablated recesses encoding information, and wherein the first coating comprises one or a combination of the following materials: a metal nitride, a metal carbide, a metal boride, a metal silicide.

This invention provides a composite electrode material, a novel flexible micro supercapacitor comprising the same, and a method for fabricating the same. The electrode active material comprises: a two-dimensional transition metal boride layered nanomaterial and conductive nanotubes; wherein the two-dimensional transition metal boride layered nanomaterial has a multilayered accordion-like structure; the conductive nanotubes are uniformly dispersed and supported in the interlayer spaces of the accordion. The flexible micro supercapacitor of this invention maintains high capacitance density at high charge-discharge rates, exhibits efficient ion transport and excellent electrochemical performance, while also possessing good flexibility and stability. The process provided by this invention is simple, facilitates mass production, and has broad application prospects.

This invention relates to compositions comprising borohydride coordination compounds, precursor containers comprising borohydride coordination compounds, and methods and systems for vapor deposition, wherein borohydride coordination compounds are used for depositing metal borides or metal films. The borohydride coordination compounds have the chemical formula MH. 3‑x (BH4) x (NR 1 R 2 R 3 ), where M is a Group 13 metal, x has a value of 2 or 3, and R 1 and R 2 Each is independently selected from C1 to C8 alkyl groups, and wherein R 3 It is a C2 to C8 alkyl group, or wherein R 1 With R 2 Together with N, they form a four- to nine-membered ring, and R 3 Selected from C1 to C8 alkyl groups, or R 3 With R 2 Together with N, they form a four- to nine-membered ring.