Ceramic sintering is a general term for the compaction process and phenomenon of green body at high temperature. The general term for the compaction process and phenomenon of green body at high temperature.
As the temperature rises, the ceramic green body has powder particles with a larger specific surface and higher surface energy, trying to change to the direction of reducing the surface energy, continuous material migration, the grain boundary moves with it, the pores are gradually eliminated, and shrinkage occurs. Make the body into a dense porcelain body with a certain strength.
The driving force for sintering is surface energy. Sintering can be divided into sintering with liquid phase participation and pure solid phase sintering. The sintering process is very important for ceramic production. In order to reduce the sintering temperature and expand the firing range, some additives are usually added as fluxes to form a small amount of liquid phase to promote sintering. Such as adding a small amount of silica to promote the sintering of barium titanate ceramics; and adding a small amount of magnesium oxide, calcium oxide, and silica to promote the sintering of alumina ceramics.
Ceramic Sintering
2020 04/13