Aluminum nitride has excellent thermal conductivity and is an ideal material for crucibles, but the cost of making crucibles with this material is relatively high, which also limits its application. In industrial production, people will use a variety of crucibles with different dimensions, and the processing technology and surface treatment of these crucibles are not the same. Huamin Ceramics can currently produce aluminum nitride ceramic crucibles as small as 5mm and as large as 300mm in diameter.

Aluminum nitride ceramics can be used as containers for vacuum evaporation and metal smelting and chemicals, especially for aluminum vacuum evaporation crucibles, because aluminum nitride ceramics are heated in a vacuum with low vapor pressure, and will not pollute even if decomposed aluminum. In the semiconductor industry, the use of aluminum nitride crucibles instead of quartz crucibles to synthesize arsenide can completely eliminate the contamination of GaAs by Si and obtain high-purity products. Ceramic crucibles have square, round, conical, and other shapes, which can be customized according to drawings and samples, and the size can be fixed. This product is a round ceramic crucible.

Aluminum nitride ceramic crucible performance advantages:

1. High thermal conductivity (about 320W/m·K), close to BeO and SiC, more than 5 times that of Al2O3;

2. The thermal expansion coefficient (4.5×10-6°C) matches Si (3.5~4×10-6°C) and GaAs (6×10-6°C);

3. Various electrical properties (dielectric constant, dielectric loss, volume resistivity, dielectric strength) are excellent;

4. Good mechanical properties, the flexural strength is higher than that of Al2O3 and BeO ceramics, and it can be sintered under normal pressure;

5. High purity, non-toxic, good optical transmission characteristics;

6. It can be made by casting process.