Problems that may occur in the sintering process of zirconia ceramics

1. Rupture

The main reason for the cracking of the sintered ceramic body is that there are defects in the ceramic body, and it is also related to the shrinkage of the green body. The reason for the inconsistent shrinkage of the green body is referred to the analysis of the cause of sintering deformation.

When the shrinkage is inconsistent, if there are defects (holes, dark cracks, etc.), the defects become the source of fracture, and the crack propagation causes the green body to crack.

2. Abnormal growth of grains

When the grains grow abnormally, there are often a large number of pores in these excessively large grains, which are difficult to be discharged from the grains to the grain boundaries, which will make it difficult for the ceramic material to achieve higher density and many properties of the material. Deterioration, especially mechanical properties (fracture toughness, flexural strength, etc.).