What is Aluminum Nitride Ceramic?
Aluminum nitride AIN is famous for its high thermal conductivity and excellent electrical insulation. It is a common ceramic material, which is used in all kinds of electrical equipment. In addition to the coefficient of thermal expansion and electrical insulation, aluminum nitride ceramics can resist the erosion of most molten metals, such as copper, lithium and aluminum.
Aluminum nitride (AlN) is a kind of non-oxide ceramic material which is basically composed of aluminum and nitrogen (Al-65.81%,N-34.19). The chemical formula is AlN. It is a solid nitride of aluminum with high thermal conductivity of up to 321 W and can be used as an excellent electrical insulator. The band gap of wurtzite phase of aluminum nitride is about 6 eV at room temperature. Because of these properties, this ceramic has been proved to be suitable for many applications, such as optoelectronics working at deep ultraviolet frequencies.
Aluminum nitride was first synthesized by F. Briegleb and A. Geuther in 1862. Ceramic materials mainly exist in the crystal structure of hexagonal wurtzite. However, it can also be used in metastable cubic sphalerite phase, which is mainly synthesized into thin films. It is predicted that the cubic phase of AlN can actually exhibit superconductivity under high pressure.
The polycrystalline structure of aluminum nitride (AlN) has high thermal conductivity, so it has electrical insulation properties. In terms of density, aluminum nitride is a covalent bond compound with a theoretical density of 3.26g/cm3.
Aluminum Nitride Ceramic Properties
High thermal conductivity (above 170W/mK). This is close to the values of BeO and SiC and is more than five times that of alumina (Al2O3).
Its thermal expansion coefficient is 4.5 * 10-6 ℃, which is the same as that of silicon (3.5-4 * 10-6 ℃).
It has good light transmission characteristics.
It's not toxic.
It has good electrical conductivity. The electrical properties of aluminum nitride include its dielectric constant, dielectric loss, bulk resistivity and dielectric strength-all of which make it an excellent insulating material.
Good mechanical properties: the mechanical properties of aluminum is also the reason why it is widely used in the industrial process. It has higher bending strength than alumina (Al2O3) and beryllium oxide (BeO) ceramics.
What are Aluminum Nitride Ceramics used in?
Aluminum nitride ceramics have been used in many fields because of their good properties including high thermal conductivity low permittivity and dielectric loss high insulation strength and remarkable plasma corrosion resistance. Some common applications of this material are:
Chip cooling and support.
Application of AlN Ceramic substrate (Ceramic Tray) in Semiconductor Devices.
Aluminum nitride etching shield.
Aluminum Nitride evaporation Boat for OLED.
Another important use case of aluminum nitride ceramics is the manufacture of plastics and resins. These materials usually have low thermal conductivity (less than 0.3W/mk). By adding aluminum nitride powder to plastics and resins, they produce thermally conductive potting compounds and pads with high thermal conductivity, usually higher than 10W/mk. They are also used for the packaging of various electronic components.
More and more researchers are studying the use of gallium nitride-based semiconductors to produce light-emitting diodes that work in the ultraviolet region. These studies show that it is possible to achieve wavelengths as short as 250 nm by using aluminum gallium nitride alloy.
Aluminum Nitride Ceramics Uses
Radiator and radiator.
Steel and semiconductor manufacturing.
Silicon wafer processing and processing.
As a crucible for the growth of gallium arsenide crystals.
Substrates and insulators used as microelectronic devices.
Electronic packaging substrate.
Chip carriers for sensors and detectors.
Laser thermal management module.
Used as a dielectric layer in optical storage media.
Molten metal fixture.
Microwave device packaging.
Aluminum Nitride Price
The price is influenced by many factors including the supply and demand in the market, industry trends, economic activity, market sentiment, and unexpected events.
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Aluminum Nitride Supplier
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