Silicon nitride is the hardest substances in the world because of its high intensity, especially the silicon nitride by hot pressing . It can stand up to high temperature and its intensity will not decline till 1200℃ ， silicon nitride can not be molten into eutectic mixture after heating until 1900℃ .It has excellent chemical corrosion resistance , can resist almost all inorganic acid and caustic soda and caustic soda solution which is below 30% , as well as much organic acid. Silicon nitride is also a kind of material with high performance for electrical insulation.

Feature:

1. High strength & good compactness

2. Low thermal expansion coefficient

3. Excellent thermal shock resistance

4. No wetting by molten aluminium and other non-ferrous molten metal

5. Good corrosion resistance

Application:

Widely used in non-ferrous metallurgy due to the corrosion resistance.