Risk aversion plunged on the positive news of the Russia-Ukraine talks. After several days of rising oil prices, the price of precious metals continued to fall. Domestic futures markets remain stable for the time being.
Back in international markets, WTI crude futures briefly dipped below $100 a barrel, while Brent crude hit its lowest intraday level in nearly two weeks. Spot gold briefly fell below $1,900 an ounce. Comex gold futures closed down 1.1 percent at $1,918.4 an ounce. Comex silver futures closed down 1.14 percent at $24.91 an ounce. "Recently, crude oil prices have been extremely sensitive to changes in geopolitical news." Traders believe that the current oil price is still in the broad impact, Ukraine will still be a premium in the case, although the market further decline, but should not be too pessimistic, it is recommended to wait and see for the time being. The Ukrainian premium is still there and there will be some volatility in the Aluminum Niitride market.
What is Aluminum Nitride?
Aluminum nitride, covalent bond compound, chemical formula is AIN, is an atomic crystal, belongs to diamond-like nitride, hexagonal system, wurtzite crystal structure, non-toxic, white or off-white.
The main features of Aluminum Nitride
AlN is stable up to 2200°C. The strength at room temperature is high, and the strength decreases slowly with the increase of temperature. Good thermal conductivity, small thermal expansion coefficient, is a good thermal shock material. It has strong corrosion resistance to molten metal, and is an ideal crucible material for casting pure iron, aluminum or aluminum alloy. Aluminum nitride is also an electrical insulator with good dielectric properties and is also promising as an electrical component. The aluminum nitride coating on the gallium arsenide surface protects it from ion implantation during annealing. Aluminum nitride is also a catalyst for the conversion of hexagonal boron nitride to cubic boron nitride. It reacts slowly with water at room temperature. It can be synthesized by aluminum powder in ammonia or nitrogen atmosphere at 800~1000℃, and the product is white to gray-blue powder. Or by the reaction of Al2O3-C-N2 system at 1600~1750℃, the product is off-white powder. Or prepared by vapor-phase reaction of aluminum chloride and ammonia. The coating can be synthesized by the vapor-phase deposition method of AlCl3-NH3 system.
|Aluminum Nitride Properties|
|Other Names||Aluminium nitride|
|Appearance||White to pale yellow powder|
|Melting Point||2200 °C|
|Boiling Point||2517 °C (dec.)|
|Density||2.9 to 3.3 g/cm3|
|Solubility in H2O||N/A|
|Electrical Resistivity||10 to 12 10x Ω-m|
|Poisson's Ratio||0.21 to 0.31|
|Specific Heat||780 J/kg-K|
|Thermal Conductivity||80 to 200 W/m-K|
|Thermal Expansion||4.2 to 5.4 µm/m-K|
|Young's Modulus||330 GPa|
The use of Aluminum Niitride
It is reported that most of the research today is developing a semiconductor (gallium nitride or alloy aluminum gallium nitride) based light emitting diode that operates in ultraviolet light with a wavelength of 250 nanometers. In May 2006, it was reported that an inefficient diode can emit light with a wavelength of 210 nm . A single aluminum nitride crystal has an energy gap of 6.2 eV measured by the reflectance of vacuum ultraviolet rays. In theory, the energy gap allows some waves with wavelengths around 200 nanometers to pass through. But in commercial implementation, there are many difficulties to overcome. Aluminum nitride is used in optoelectronic engineering, including as dielectric layers in optical storage interfaces and electronic substrates, as chip carriers with high thermal conductivity, and for military applications.
Due to the properties of the piezoelectric effect of aluminum nitride, epitaxial stretching of aluminum nitride crystals is also used for surface acoustic wave detectors. The detectors are placed on silicon wafers. There are very few places where these thin films can be produced reliably.
Aluminum nitride ceramics have the characteristics of high room temperature and high temperature strength, small expansion coefficient and good thermal conductivity, and can be used as heat exchanger materials for high temperature structural parts.
Using aluminum nitride ceramics to resist the corrosion properties of iron, aluminum and other metals and alloys, it can be used as crucible and casting mold materials for smelting Al, Cu, Ag, Pb and other metals.
The main supplier of Aluminum Niitride
Luoyang Trunnano Tech Co., Ltd (TRUNNANO) is a professional nitirde powder supplier with over 12 years of experience in chemical products research and development. We accept payment via Credit Card, T/T, West Union, and Paypal. Trunnano will ship the goods to customers overseas through FedEx, DHL, by air, or by sea.
If you are looking for high-quality boron carbide powder, please feel free to contact us and send an inquiry.
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