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Aluminum nitride AlN melts at 2800°C and is stable at higher temperatures in an inert environment. It is highly thermally conductive and has good electrical insulation. This combination makes it a valuable advanced material for many applications, including optics and lighting, electronics, renewable energy, and other electronic devices.
Aluminum nitride structure
Aluminum nitride AlN is a covalent bonding substance with a hexagonal crystal structure. The most common methods of preparing aluminum Nitride include direct nitridation (carbothermal reduction), high-energy ball milling and high-temperature self propagating synthesis. Chemical vapor deposition is another popular method.
The preparation method for aluminum nitride clays
The process of making aluminum nitride clays is very similar to other ceramic materials. There are three main preparation methods: powder synthesis; molding; and sintering.
As the raw material, aluminum nitride is used to make the final ceramic product. The purity of the powder, its particle size, oxygen content, and other impurities have a significant impact on the thermal conductivity, subsequent drying, and the forming process. It is the outstanding performance of the final product. cornerstone. There are many ways to make aluminum nitride, including direct nitridation or carbothermic reduction, self propagating high-temperature synthesizing, chemical vapor deposition, and self-propagating.
Molding process for aluminum nitride dust
There are many ways to mold aluminum nitride powder. These include traditional molding processes like molding, hot pressing and isostatic press. All of them are possible. All are applicable due to the high hydrophilicity aluminum nitride granules. To reduce the risk of aluminum oxide oxidation, avoid contact with water while molding. Although hot pressing and isostatic presses are capable of preparing high-performance bulk aluminium nitride materials, their high production costs and inefficientness cannot be met by the rising demand for aluminum substrates for electronics. This problem was solved by adopting the casting method to make aluminum nitride clay substrates. The aluminum nitride clays used in electronics manufacturing are also made using the tape casting process.
Aluminum Nitride Ceramics
Aluminum nitride ceramics are also used extensively as a substrate, electronic film material and as a coating for crucible or other refractory material. Aluminum nitride can also be used as an aluminum container for vacuum extraction and the smelting metals.
Its numerous excellent properties make aluminum nitride a versatile material. It is a piezoelectric film and has been widely used. As the market develops, the applications of aluminum nitride-ceramic materials will expand. This is becoming more common.
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