Aluminum Nitride Ceramic semiconductor accessories
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Aluninum Nitride Ceramic:
In order to obtain a stable single austenitic structure, aluminum nitride ceramics requires the lowest nickel content, about 8%. In this regard, the commonly used 18Cr-8Ni chromium-nickel austenitic stainless steel contains chromium and the amount of nickel Than the most suitable one. In austenitic stainless steels, as the chromium content increases, the tendency to form some intermetallic phases (such as δ phase) increases. When the steel contains molybdenum, the chromium content will increase and χ will be formed equal, as before As mentioned, the precipitation of σ, χ phase not only significantly reduces the plasticity and toughness of steel, but also reduces the corrosion resistance of steel under some conditions. The increase in the content of chromium in austenitic stainless steel can make the martensite conversion temperature (Ms ) Decrease, thereby improving the stability of the austenite matrix. Therefore, high chromium (for example, more than 20%) austenitic stainless steel is difficult to obtain martensite structure even after cold working and low temperature treatment. Chromium is a strong carbide forming element, and it is no exception in austenitic stainless steel. The common chromium carbide in austenitic stainless steel is Cr23C6; when the steel contains molybdenum or chromium, carbides such as expired Cr6C can also be seen. The formation of steel will have an important impact on the performance of steel under certain conditions. ○2 Effect of chromium on performance: Generally speaking, as long as the austenitic stainless steel maintains a completely austenitic structure without the formation of δ ferrite, only increasing the chromium content in the steel will not have a significant impact on the mechanical properties. The performance of austenitic stainless steel has the greatest impact on corrosion resistance, which is mainly manifested as: chromium improves the performance of steel's oxidation resistance medium and acid chloride medium; under the combined action of nickel, molybdenum and copper, chromium improves steel resistance to some reduction Performance of medium, organic acid, urea and alkali medium
Using AIN ceramics for heat resistance, melt erosion and thermal shock resistance, GaAs crystal crucible, Al evaporating dish, magnetic fluid power generation device and high temperature turbine corrosion resistant parts can be fabricated, and its optical properties can be used as an infrared window. The aluminum nitride film can be made into a high frequency piezoelectric element, a very large scale integrated circuit substrate, or the like.
Aluminum nitride heat-resistant, resistant to molten metal erosion, stable to acid, but easy to be eroded in alkaline solution. The AIN fresh surface is exposed to moist air and reacts to form a very thin oxide film. By utilizing this property, it can be used as a crucible and a die-casting mold material for smelting metals such as aluminum, copper, silver, and lead. AIN ceramics have good metallization properties and can be widely used in the electronics industry as an alternative to toxic cerium oxide.
Data Sheet:
Ø (1) high thermal conductivity (about 320W / m · K), close to BeO and SiC, more than 5 times that of Al2O3;
Ø(2) The thermal expansion coefficient (4.5×10-6°C) is matched with Si (3.5-4×10-6°C) and GaAs (6×10-6°C);
Ø (3) excellent electrical properties (dielectric constant, dielectric loss, volume resistivity, dielectric strength);
Ø(4) good mechanical properties, higher flexural strength than Al2O3 and BeO ceramics, can be sintered at normal pressure;
Ø (5) good optical transmission characteristics;
Ø(6) non-toxic;
Application industry:
Aluminum nitride powder has high purity, small particle size and high activity, and is the main raw material for manufacturing high thermal conductivity aluminum nitride ceramic substrate.
Aluminum nitride ceramic substrate, high thermal conductivity, low expansion coefficient, high strength, high temperature resistance, chemical corrosion resistance, high resistivity, small dielectric loss, is an ideal large-scale integrated circuit heat sink substrate and packaging materials.
Why Choose Us? 1.12 years of professional production industrial ceramics factory 2.High quality products with low price 3.High precision parts with lowest tolerance 4.Short time for production 5.Has a group of experienced, professional and efficient R&D team 6.Has a good reputation in China and abroad. 7.MOQ is not limited, small quantity is welcome.
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