What are several factors that can affect the sintering of zirconia ceramics?

Both the production of traditional ceramics and today's precision structured zirconia ceramics cannot be separated from the sintering stage. So it can be said that sintering is the key process step that determines the forming of ceramic bodies, which can also determine the performance of ceramic products. So, how to burn zirconia ceramics with high density and uniformity to reduce manufacturing costs? Below, Kezhong Ceramic Factory will analyze several factors that may affect its sintering process.

Firstly, it is the degreasing stage. Simply put, it is the separation of organic matter from the ceramic body through heating or other methods. Degreasing is a very important stage in the entire production process, which has a significant impact on subsequent sintering. If the control is not good, it will lead to a series of problems such as pores or microcracks in the green body. Therefore, the requirement for degreasing in the firing of zirconia ceramics is very high.

Secondly, there is also the quality of the original powder. Generally speaking, the higher the Dispersity of the material, the higher its surface energy, and the more conducive to sintering. At the same time, during the full crushing process, fine particles can increase the driving force of sintering, shorten the distance of atomic diffusion, improve the solubility of particles in the liquid phase, and thus effectively improve the sintering rate.

Finally, it is the quality of the additives. Usually, the addition of additives will inhibit grain growth; However, in some cases, the results are exactly the opposite. In solid-state sintering, adding a small amount of additives can change the properties of the liquid phase (such as viscosity, composition, etc.), thereby promoting sintering.

Of course, in addition to the above reasons that can affect the quality of zirconia ceramic production, there are also factors such as sintering temperature and insulation time, molding pressure, and sintering atmosphere that can affect it.

For example, different sintering atmospheres can have varying degrees of impact on the sintering process of ceramics. Some atmospheres can promote sintering, while others can hinder sintering. So when making zirconia ceramics, it is important to grasp these influencing factors.

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