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What are the applications of nitride powder

wallpapers Tech 2021-01-14
Nitrogen has high electronegativity and can form a series of nitrides with many low electronegativity elements, including three types of ion nitrides, covalent nitrides and metal nitrides. So what are the applications of nitride powder?
 
Cutting material
 
TiN has a high hardness (Mohs hardness: 8-9), high melting point (2950°C) and high wear resistance. In industry, it is usually used as a coating for cutting tools, which can effectively reduce tool wear and increase cutting speed. , But its hardness is still difficult to meet the requirements of high hardness products.
 
The hardness of cubic boron nitride (c-BN) is second only to diamond. As an isoelectronic body of C, it not only has many excellent characteristics of diamond but also has high thermal stability and chemical inertness, which is a promising development prospect. Tool materials.
 

β-C3N4 is considered to be the hardest material at present and has attracted widespread attention, but its synthesis and characterization are the difficulties of current research.
 
High temperature structural materials
 
Silicon nitride (Si3N4) ceramics have high strength, high hardness, low density, corrosion resistance, good thermal shock resistance and excellent high temperature mechanical properties. They are widely used in the reinforcement stage of ceramic matrix composites and are considered the most promising. One of the most engineering ceramics.
 
Hexagonal boron nitride (h-BN) is a covalent bond compound. Due to its excellent properties, such as high thermal conductivity, good chemical stability, excellent thermal stability and better electrical insulation, it is widely used in refractory materials and ceramic matrix composites.
 
Luminescent material
 
In recent years, IIIA~VA group nitrides have become a hot spot in the field of semiconductor light-emitting device research. Nitride has high physical and chemical stability, continuously adjustable bandgap, high saturation speed of wide bandgap electron drift, low dielectric constant and good thermal conductivity, and Eu2 + and Ce3 + plasma is easy to dope nitride The formation of a shorter Eu-N / Ce-N covalent bond in the structure reduces the 5d energy level of the activator ion and redshifts the excitation and emission wavelengths. Therefore, compared with other traditional phosphors, nitride phosphors have obvious advantages in terms of stability, color rendering, excitation wavelength, and quantum efficiency, and are of great significance for the preparation of high-efficiency white light LEDs.
 
Electrode material
 
Li 3 N has high ionic conductivity, but its decomposition voltage is too low (0.44V) to be directly used as an electrode. Transition metal nitrides have the advantages of good stability, high decomposition voltage, and good conductivity, and have received extensive attention as lithium-ion anode materials. Currently, reported metal nitride anode materials include lithium cobalt nitride, chromium nitride, manganese nitride, and vanadium nitride.
 
Catalytic material
 
Thanks, Volpe et al. In 1985, under programmed temperature conditions, MoO3 reacted with NH3 for the first time to form γ-Mo2N with a specific surface area (220m2/g). Transition metal nitrides have attracted extensive research interest as new catalytic materials. Because of its catalytic properties like precious metals, it can be used for hydrogenation, hydrogenolysis, Fischer-Tropsch (FT) synthesis, NH3 synthesis and decomposition, hydrodesulfurization (HDS), hydrodenitrogenation (HDN) and electrocatalytic hydrogen production ( HER), etc. It has good catalytic activity in the reaction.
 
Superconducting material
 
MN (M = Nb, Zr, Ti, V, Hf, Ta, Mo) is a NaCl-type face-centered cubic structure and is a traditional superconductor. Their superconducting temperatures are NbN, 17.3K; ZrN, 9.0K; TiN, 5.5K; VN, 8.5K; HfN, 88,300; TaN and MoN, 12K. This type of superconductor has high hardness and stability and is expected to become a superconductor material with excellent performance.
 
Absorbent material
 
Iron nitride (nickel) has high resistivity, high oxidation resistance, corrosion resistance, and high ferromagnetism, and has good application prospects in the field of absorbing materials.
 
Adsorption material
 
Boron nitride is porous and composed of light elements, has a high specific surface area, high chemical stability, and thermal stability, and is an ideal adsorption material.
 

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