Introduction to AlN powder Aluminum Nitride
It is a covalent-bonding compound. The chemical formula for AIN is It is anatomical crystal, belongs in the diamond-like, hexagonal nitride system. The crystal structure is wurtzite-type, non-toxic, and can be white or off-white.
This synthetic mineral is not found in nature. AlN’s crystal structure is hexagonal wurtzite, and has a low density of 3.26g/cm3. It also has high strength, good heat resistance (Decomposition occurs at 3060), high thermal conductivity as well as corrosion resistance.
Physicochemical properties of aluminum Nitride AlN powder
AlN remains stable above 2200. It has a high strength at room temperatures and a slow decrease in strength with temperature increases. AlN has a high thermal conductivity and a low thermal extension coefficient making it a good heat shock material. It is a great crucible material to melt and cast pure iron, aluminum, and aluminum alloys. Aluminum nitride also has good dielectric properties. It is also a promising electric component. It is protected by ionization during annealing thanks to the aluminum nitride coat on gallium arsenide. Aluminum nitride also acts as a catalyst in the conversion of hexagonal to cubic boron nutride.
It reacts slowly at room temperature with water. It can also be produced from aluminum powder, ammonia or nitrogen at 8001000. It can be white or grayish-blue in color. Gray powder can be obtained by using the al2O3C–N2 system reaction synthesis at 16001750. Or, you can use aluminum chloride and ammonia gases in the opposite direction. By vapor deposition, the AlCl3/NH3 system can be used to make the coating.
It is summarized as follows:
1. It has a high thermal conductivity of about 320W/m*K, which is close to SiC and BeO. This is more than 5x that of Al2O3
2. Excellent electrical properties (eg, dielectric constant, dielectric loss, body resistivity, dielectric strength);
3. Good mechanical properties. The flexural strength of BeO and Al2O3 ceramics is greater than theirs and can be atmospherically sintered.
4. Good optical transmission properties
|Aluminum Nitride AlN Powder Properties|
|Other Names||Aluminium nitride|
|Appearance||White to pale yellow powder|
|Boiling Point||2517 degC (dec.)|
|Solubility of H2O||N/A|
Aluminum Nitride AlN Powder – Applications
AlN’s piezoelectric property makes it possible for the extensional extension to AlN crystals to be used in surface acoustic-wave detectors. These detectors will be placed onto silicon wafers.
Aluminum nitride ceramics
They have high room temperature, high-temperature strength, and a small coefficient for expansion. This makes them suitable to be used as high heat structural parts of heat exchanger materials.
Due to their corrosion resistance against iron, aluminum and other metals, the aluminum nitride clays can be used for crucibles or casting material for melting Al and Cu, Ag and Pb.
Aluminum nitride ceramics
High-tech ceramics are a new breed. Aluminum nitride substrate is non-toxic, resistant to corrosion, high-temperature resistance and good thermochemical stability. Aluminum nitride substrate makes a good packaging material, heat dissipation, circuit component, interconnect carrier, and packaging material for large-scale integrated and semiconductor circuits. It also has the ability to handle high-power devices. It is also a great additive to increase the thermal conductivity, mechanical properties, and strength of polymer materials. Aluminum nitride can be used for smelting nonferrous metals, semiconductor gallium arsenide, thermocouple protection tube, and high-temperature insulation parts. Also, it can be used for microwave transparent aluminum oxide ceramic products. These ceramics are used as high thermal conductive ceramic production materials, resins, fillers, and so on. Aluminum nitride can be used as an electrical insulator and has good dielectric properties. The gallium arsenide’s aluminum nitride coat protects it against ion implantation during annealing.
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Aluminum Nitride AlN Powder
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