Brief introduction of microwave plasma sintering process for alumina ceramics

- Jan 21, 2021-

Compared with the conventional sintering, microwave plasma sintering can lower the sintering temperature by 200*C under the same conditions. It has a fast sintering speed, small grain size and high mechanical strength. One reason why microwave plasma sintering promotes densification is the rapid heating, which reduces the size of the crystal grains caused by surface diffusion, and provides a strong driving force and a shorter distance for volume diffusion and grain boundary diffusion. Thereby, the sintering temperature of alumina ceramics is reduced and the crystal grains are refined.