How many types of nitride powders are there?

Classification of nitride powder
Nitrogen has high electronegativity and can form a series of nitrides with many elements with lower electronegativity, including three types of ionic nitrides, covalent nitrides and metal nitrides.
Ionic Nitride
At present, only Li3N is used in ionic nitrides. Li3N is a deep red solid and belongs to the hexagonal crystal system. It has a density of 1.27g cm3 and a melting point of 813°C. It is easy to synthesize and has high ionic conductivity. It can be combined with solid or liquid The coexistence of lithium is one of the best solid lithium electrolytes currently available.
Covalent nitride
The most widely used covalent nitrides are the nitrides of IIIA and IVA elements (such as BN, AlN, GaN, InN, C3N4 and Si3N4, etc.). The structural unit is similar to the tetrahedron of diamond, so it is also called class Diamond nitride. They have high hardness, high melting point, and good chemical stability. Most of them are insulators or semiconductors. They are widely used in cutting tools, high-temperature ceramics, microelectronic devices, and luminescent materials.
Metal nitride
Nitrides formed by transition metal elements belong to metallic nitrides. Nitrogen atoms are located in cubic or hexagonal close-packed metal lattice gaps, which are also called infill nitrides.

Application of nitride powder
Cutting materials
TiN has high hardness (Mohs hardness: 8~9), high melting point (2950°C) and high wear resistance. It is often used as a coating for cutting tools in industry, which can effectively reduce tool wear and increase cutting rate. , But its hardness is still difficult to meet the requirements of high-hardness products.
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 phase of ceramic matrix composites and are considered to be the most promising. One of the most engineering ceramics.
Luminescent material
Nitride is a hot spot in the field of semiconductor light-emitting device research in recent years. Nitride has the advantages of high physical and chemical stability, continuously adjustable band gap, high saturation speed of wide band gap electron drift, low dielectric constant and good thermal conductivity. Therefore, compared with other traditional phosphors, nitride phosphors have the advantages of It has obvious advantages in stability, color rendering, excitation wavelength and quantum efficiency, which are of great significance for the preparation of high-efficiency white light LEDs.
Electrode material
At present, the reported metal nitride anode materials include lithium cobalt nitride, chromium nitride, lithium manganese nitride, vanadium nitride and so on.
Catalytic material
As a new type of catalytic material, transition metal nitrides have aroused great research interest. Because of its catalytic properties like precious metals, it is used in hydrogenation, hydrogenolysis, Fischer-Tropsch (FT) synthesis, NH3 synthesis and decomposition, hydrodesulfurization (HDS), hydrodenitrogenation (HDN) and electrocatalytic hydrogen evolution (HER), etc. It has good catalytic activity in the reaction.
Superconducting material
This type of superconductor has high hardness and stability, and is expected to become a superconductor material with excellent performance.
Absorbing material
Iron (nickel) nitride has high resistivity, high oxidation resistance, corrosion resistance and high ferromagnetism, and has good application prospects in the field of absorbing materials.
Porous boron nitride is composed of light elements, has a high specific surface area, high chemical stability and thermal stability, and is an ideal adsorption material.
The price of Nitride powder
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