The use of bismuth powder

1. Metal nano-lubricating additive: Add 0.1~0.5% nano-bismuth powder to the grease to form a self-lubricating and self-repairing film on the surface of the friction pair during the friction process, which significantly improves the performance of the grease.

2. Metallurgical additives: Nano-bismuth powder can be used as additives for cast iron, steel and aluminum alloys to improve the free-cutting properties of alloys.

3. Magnetic material: bismuth has a small thermal neutron absorption cross-section, low melting point and high boiling point, and can be used as a heat transfer medium for nuclear reactors.