Electrical Aluminium Nitride Ceramic

 

Electrical aluminium nitride ceramic with its excellent ability to dissipate heat up to 200 W/mK.

Chemical formula: When it comes to advanced materials, electrical aluminium nitride ceramic is noteworthy for its unique properties and applications.

The chemical composition is AI 65.81%, N 34.19%. Its powder is white or gray-white, single crystal colorless and transparent. The sublimation decomposition temperature under normal pressure is 2450 °C.   

Characteristics of electricla aluminium nitride ceramic:

1.High thermal conductivity (> 170W/m·K), close to BeO and SiC. It is more than 5 times that of Al2O3. The coefficient of thermal expansion (4.5×10-6 °C) is matched with Si (3.5~4×10-6 °C) and GaAs (6×10-6 °C). 

2.Excellent electrical properties (dielectric constant, dielectric loss, bulk resistivity, dielectric strength). Good mechanical properties with flexural strength higher than Al2O3 and BeO ceramics. It can be sintered under atmospheric pressure. 

Advantages of electrical aluminium nitride ceramic substrate:

High thermal conductivity, low expansion coefficient, high strength, and high temperature resistance characterize the material. It also offers chemical corrosion resistance, high resistivity, and low dielectric loss. Therefore, it is an ideal large-scale integrated circuit heat dissipation substrate and packaging material.