What is Aluminum Nitride?
Popular for its excellent energy conductivity and electrically insulating features, it is an excellent material for making semiconductors. In light emitter lighting technology, it can also be used as a heat sink.
Properties of Aluminum Nitride
Aluminum nitride can be described as an inorganic compound of aluminum and nitrogen. It is part of the wurtzite crystal structure and has a spectrum of 6 eV at the temperature of ambient. This makes it suitable for use in the field of deep ultraviolet optoelectronics. It also functions in the form of a circuit bus in semiconductors.
Aluminum Nitride is a hard technical ceramic material available in thick and thin forms. It is manufactured using a process of reduction by carbothermal. This process, however, can be costly, therefore an easier method of preparation needs to be researched. Several sintering aids were also employed to improve the amount of material to specifications.
Affectation of Aluminum Ntride
Aluminum nitride is a good choice to create optical substances like nanotubes for chemical sensors. It is also used as a substrate for silicon processing. It is very resistant to corrosion, oxidation and even molten metals. It's stable in high temperatures when in an inert atmosphere.
Aluminum nitride is discovered in any metal. It is a white to gray-blue powder. It's water-soluble and inorganic acids. But, it's unstable in hydrogen atmospheres. It's also extremely flammable.
It is used in mobile phones to create filtering of radio frequencies. It is also used in robotics and medical imaging. Its piezoelectric characteristics are utilized in bulk thin-film acoustic Resonators.
There is a report that the majority of research currently being conducted is focused on the development of semiconductor (GaN or AlGaN) powered LEDs that operate in the wavelength of the ultraviolet which means that the wavelength of light is 250 nm. In May 2006, it was reported that an inefficient diode can emit light with about 210 nanometers in wavelength. A single crystal of aluminum nitride has an energy gap of 6.2eV calculated by the vacuum ultraviolet reflectance. Theoretically, the energy gap allows waves with lengths of 200 nanometers to travel through. However, when using it commercially, there are many challenges that need to be overcome. Aluminum nitride is utilized in optoelectronic technology, including inductive layers used in optical storage interfaces, electronic semiconductors as chip carriers that have excellent thermal conductivity and military applications.
Stretching epitaxially of AlN crystals is also utilized for surface acoustic wave detectors because of the properties characteristic of the AlN piezoelectric force. The detectors are put over the silicon wafer. Only very few places can safely make these films.
Aluminum nitride ceramics have high strength at room temperatures and high temperatures, and a very low expansion coefficient and excellent thermal conductivity, and are suitable as heat exchangers for structure parts that operate at high temperatures.
Utilizing the corrosion resistance of aluminum, iron, and other alloys The aluminum nitride nitride ceramics could be used as crucibles and casting molds to smelt Al, Cu, Ag or Pb as well as other metals.
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