heat sink AIN aluminum nitride ceramic sheet blank

heat sink AIN aluminum nitride ceramic sheet blank

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Aluninum Nitride Ceramic:

The metal surface of aluminum nitride ceramic exposed in the corrosive environment undergoes electrochemical reaction or chemical reaction, and is uniformly corroded. In the passive film on the stainless steel surface, the weak corrosion resistance is formed due to the self-excited reaction and the formation of small pores, coupled with the approach of chloride ions, a strong corrosive solution is formed, which accelerates the rate of the corrosion reaction. There is also intergranular corrosion cracking in the stainless steel, all of which have a destructive effect on the passive film on the surface of the stainless steel. Therefore, the stainless steel surface must be regularly cleaned and maintained to maintain its gorgeous surface and extend its service life. When cleaning the stainless steel surface, you must be careful not to scratch the surface. Avoid using bleaching ingredients and abrasive detergents, steel wool, abrasive tools, etc. To remove the detergent, rinse the surface with clean water after washing. Aluminum nitride ceramics is a very thin, strong, dense and stable chromium-rich oxide film (protective film) formed on its surface. Prevent oxygen atoms from continuing to infiltrate and continue to oxidize, and gain resistance to rust. Once there is a certain reason, this kind of film is continuously destroyed, the oxygen atoms in the air or liquid will continuously separate out, forming loose iron oxide, and the metal surface will be continuously rusted. Many domestic manufacturers have reduced chromium and nickel and increased the content of manganese in stainless steel due to cost considerations. Experts believe that the reason why stainless steel can be rust-free is because of the presence of chromium and nickel. Reducing the content of these two components will reduce the rust resistance.

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.

7.MOQ is not limited, small quantity is welcome.

8.Vigorous team and good after-sales service

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