Silicon Nitride ceramic balls retain some performance relative to metal material as follows,so it has been the primarily choice of ceramic bearing:
1,High rigidity,high strength,more harder.
2,High corrosion resistance, this means they can be also used in strong acid、strong alkali .
3,High temperature resistance. Si3N4 ceramic balls can still retain the strength and hardness even the temperature comes to 1000 ℃.
5, Low density(3.26 g/cm3), it is approximately 60% lighter than steel balls, running more quieter and more long live time.
6, Low coefficient of thermal expansion(3.2×10-6/K), it is nearly 1/4 of the chrome steel, which leads to a good thermal shock resistance of Si3N4 ceramic.
7, The self-lubrication of Si3N4 ceramic roller bearings makes it can be used in vacuum and high temperature conditions without lubrication.
8, High resistance to chemical corrosion, high mechanical strength and low thermal conductivity. Application fields：high precision ceramic bearings, high temperature bearings, vacuum bearings, ceramic valve ball and so on.