What is Aluminum Nitride?
Known for its high thermal conductivity and electrical insulating qualities, aluminum nitride makes an ideal material for creating semiconductors. In light emitter lighting technology, it's also used as a heat source.
Eigenschaften of Aluminum Nitride
Aluminum nitride is an organic compound made up of nitrogen and aluminum. It belongs to the wurtzite crystal structure , and has a bandgap that is 6 eV at room temperature. This makes it ideal for applications in the fields of deep UV optoelectronics. It also functions as an electronic circuit carrier in semiconductors.
Aluminum Nitride, a very dense technical ceramic, which is offered in thin and thick versions. It is manufactured through an acid reduction process. The process could be expensive, so an easier process to prepare the powder needs to be researched. Many sintering aids have been employed to increase the strength of the material within specifications.
Application of Aluminum Nitride
Aluminum nitride can be utilized to create optical materials, such as nanotubes used in chemical sensors. It is also used as an substrate material for silicon processing. It is extremely resistant to corrosion, oxidation and molten metals. It's stable at elevated temperatures under an inert atmosphere.
Aluminum nitride can be found in almost any metal. It is a gray to white powder. This powder dissolves well in water and inorganic acids. But, it's unstable in a hydrogen atmosphere. It's also extremely flammable.
It is utilized for mobile phones, to create radio frequency filters. It is also utilized in medical imaging and robotics. These properties are utilized in bulk thin-film acoustic resonances.
There is a report that the bulk of ongoing research is focused on development of semiconductor (GaN or AlGaN) LEDs that work in the ultraviolet where the wavelength of light is 250 nanometers. In May 2006 it was discovered that an inefficient diode was able to emit light at one 210nm wavelength. A single crystal of aluminum nitride is characterized by an energy difference of 6.2eV as measured by ultraviolet vacuum reflectance. Theoretically the gap permits certain waves with wavelengths in the vicinity of 200 nanometers to traverse through. However, when you implement it commercially, there are many challenges that need to be overcome. Aluminum nitride is widely used in optoelectronic engineering, including Inductive layers on optical storage interfaces, semiconductor substrates and chip carriers that have excellent thermal conductivity and military applications.
It is known that epitaxial stretching in AlN crystals can also be used for surface acoustic wave detectors because of the properties in the AlN piezoelectric effect. These detectors are placed within the silicon wave. Only a handful can create these thin film materials.
The aluminum nitride materials have a high durability at room temperature as well as high temperatures, they have a lower expansion coefficient and excellent thermal conductivity. They are suitable to make heat exchangers the construction of high-temperature structures.
Utilizing the resistance to corrosion of aluminum, iron, and alloys of other metals aluminum nitride-based ceramics can serve as crucibles as casting molds for smelting Al, Cu, Ag, Pb, and other metals.
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