High temperature Ndfeb sintering

Relative density of sintered ndfeb powder compact is larger, the interparticle contact is a mechanical contact, low bond strength, in order to further improve the density, improve the nature of contact between the powder particles, increase strength, make the magnets with high magnetic performance of the microstructure characteristics of need to basic phase powder compact heating temperature below the melting point, heat treatment for a period of time, this process is called sintering.

After the sintered magnet is quenched at high temperature, the grain boundary phase distribution is uneven and the grain boundary is not clear. Therefore, it is necessary to conduct tempering treatment at a certain temperature to optimize the structure and obtain the best magnetic properties.Tempering means that the sintered magnetic powder is cooled to a certain temperature and then heated up again.

Learn More : Vacuum Sintering Furnace