Firing Technology of Ceramics

The technical method of densifying a granular ceramic body and forming a solid material is called sintering. Sintering is a method of removing the gaps between particles in the ceramic body, removing a small amount of gas and impurity organic matter, and then making the particles grow and combine with each other to form new substances. The most widely used heating device for firing is the electric furnace. In addition to normal pressure sintering, that is, pressureless sintering, there are also hot pressing sintering and hot isostatic pressing sintering. Although continuous hot pressing sintering can increase the output, the equipment and molds required are too expensive. In addition, because it is axially heated, the length of ceramic products is limited. Hot isostatic pressing uses high temperature and high pressure gas as the pressure transmission medium, which has the advantage of uniform heating in all directions, and is very suitable for the sintering of complex shaped ceramic products. Due to the uniform structure, the performance of the material is 30%-50% higher than that of cold-pressed sintering. It is 10%-15% higher than general hot pressing sintering.