What is the term Aluminum Nitride?
It is renowned for its superior energy conductivity and electrically insulating features, it makes an ideal material to make semiconductors. In light emitter lighting technology, it can also be utilized as a heating element.
Properties of Aluminum Nitride
Aluminum nitride can be described as an inorganic compound consisting of nitrogen as well as aluminum. It is part of the wurtzite crystal structure , and it has a bandgap measurement of 6 eV at the temperature of ambient. This makes it suitable for applications in the optics of deep ultraviolet. It is also used to act as a carrier for circuits in semiconductors.
Aluminum Nitride is a hard technical ceramic material that comes in thick and thin forms. It is manufactured using a carbothermal reduction process. However, this method can be costly, therefore an alternative process for preparation of powder that is less expensive is required to be researched. Several sintering aids were also employed to improve the densities of the material to specifications.
Utilization of the Aluminum Nitride
Aluminum nitride is a good choice to create optical materials, including nanotubes for chemical sensors. It can also be used substrate material in silicon processing. It is highly resistant to corrosion, oxidation, as well as molten metals. It's stable in high temperatures and in an inert environment.
Aluminum nitride can be present in all metals. It is a gray-white to white powder. It's soluble in water and inorganic acids. But, it's unstable in hydrogen atmospheres. Also, it is highly flammable.
It is utilized by mobile phone manufacturers to form wireless frequency filters. It is also used in medical imaging and robotics. The piezoelectric properties of the material are utilized in bulk thin-film acoustic resonances.
There is a report that most of the present research focuses on creation of semiconductor (GaN or AlGaN) powered LEDs that 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 around 210 nanometers. A single aluminum nitride crystal has an energy gap of 6.2eV as measured by ultraviolet vacuum reflectance. Theoretically this permits certain waves with wavelengths on the order of 200 nanometers to pass through. However, when it is implemented commercially, there are many challenges that need to be overcome. Aluminum nitride is used in optoelectronics. It is used as Inductive layers on optical storage interfaces, electronic chip carrier substrates that have high thermal conductivity, and military applications.
An epitaxial stretching technique for AlN crystals is additionally used in surface acoustic-wave detectors because of the properties inherent to the AlN piezoelectric force. These detectors are placed over the silicon wafer. Only a few places are able to consistently produce these thin films.
Aluminum nitride-based ceramics possess high resistance to temperature changes and at high temperatures. They have a smaller expansion coefficient, as well as good thermal conductivity, and are suitable as heat exchangers on high-temperature structural parts.
Utilizing the resistance to corrosion of aluminum, iron, and alloys of other metals the aluminum nitride and other ceramics can be used as crucibles as well as casting molds for melting Al, Cu, Ag Pb, as well as other metals.
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