What is Aluminum Nitride?
Awarded for its outstanding thermal conductivity and electrical insulating capabilities, aluminum Nitride makes an excellent material for making semiconductors. In the field of light emitter technology, it can also be employed as a heat sink.
The properties of aluminum nitride
The inorganic aluminum nitride compound made up of nitrogen and aluminum. It belongs to the wurtzite crystal type and has a bandgap of 6 eV at the temperature of ambient. This makes it suitable for applications in the field of deep-UV optoelectronics. It is also utilized as a circuit carrier in semiconductors.
Aluminum Nitride is an extremely dense technical ceramic, which is offered in thin and thick forms. It is made using the carbothermal reduction method. However, this process may be expensive, so an easier method of preparation must be explored. There were a variety of sintering tools utilized to bring the density of the material up to specifications.
Applications of Aluminum Nitride
The aluminum nitride compound can be used for optical components including nanotubes for chemical sensors. It can also be used a substrate material for silicon processing. It is resistant to corrosion, oxidation and even molten metals. It's a stable material even at extreme temperatures under an inert gas atmosphere.
Aluminum nitride is found in almost any metal. It is a gray or white powder. This powder dissolves well in water as well as inorganic acids. It is, however, unstable in a hydrogen atmosphere. It is also extremely flammable.
It is used as a component in smartphones to form Radio frequency filters. It is also employed in robotics and medical imaging. Its piezoelectric characteristics are utilized in bulk acoustic thin-film resonators.
It has been reported that the majority of recent research is focused around the creation of semiconductor (GaN or AlGaN) made LEDs which operate in the ultraviolet in which the wavelength is 250 nm. In May 2006 it was revealed that an inefficient diode could emit light with a wavelength of 210 nm. A single crystal of aluminum nitride includes an energy gap that is 6.2eV calculated by the vacuum ultraviolet reflectance. Theoretically, the energy gap allows some waves with lengths of 200 nanometers to traverse through. However, when using it commercially, many difficulties need to be resolved. Aluminum nitride can be found in optoelectronics, for example, semiconductor layers in optical storage interfaces, electronic chip carrier substrates that have high thermal conductivity, as well as military applications.
Extending epitaxially on AlN crystals is also utilized in the detection of acoustic waves on surfaces because of the properties of the AlN piezoelectric effects. The detectors are placed within the silicon wave. Only very few places can consistently produce these thin films.
Ceramics made of aluminum nitride exhibit high capacity at room temperature, as well as high temperature, a small expansion coefficient, and good thermal conductivity. They are suitable as heat exchangers in structures with high temperatures.
Utilizing the corrosion resistance of aluminum, iron, as well as alloys made of other metals the aluminum nitride and other ceramics can serve as crucibles as casting molds that can be used for smelting Al, Cu, Ag Pb, and other metals.
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