The Main Factors Affecting The Properties of Zirconia Ceramics

The main raw material of the zirconia ceramic is high purity zirconia powder, its performance and content have a great influence on the performance of the zirconia ceramic. In addition, the performance of zirconia ceramics is also affected by other factors, including raw material particle size, molding method, and sintering method.

The main raw material of the zirconia ceramic is high purity zirconia powder, its performance and content have a great influence on the performance of the zirconia ceramic. In addition, the performance of zirconia ceramics is also affected by other factors, including raw material particle size, molding method, and sintering method.

In order to produce high-performance zirconia ceramic structural parts, we should keep these factors controled. Now Mingrui Ceramic technicians will analyze these factors and share the experience of how to control them.

1. Effect of forming methods on the properties of zirconia ceramics.

The zirconia ceramics with low porosity and high density have excellent structural properties. High density means that the grains in the ceramic body are closely arranged, and it is not easy to form a destructive breakthrough when subjected to external loads or corrosive materials.

In order to obtain the ceramic embryo with calcareous density, the forming method is the key. Zirconia ceramics are generally formed by dry pressing, isostatic pressing, hot pressing, and so on. Different methods have different characteristics and have different effects on the sintering property and microstructure of curing rate ceramics.

Generally speaking, the products with complex shapes are mainly by grouting and hot die-casting process, and the products with simple shapes can be formed by dry pressing. Generally speaking, the compactness of dry-pressed products is better than that of hot-cast products.

2. Effect of particle size of raw materials on the properties of zirconia ceramics.

The particle size of the raw material powder has a great influence on the properties of the products. only if the raw material is fine enough, the final fired product can form microstructure and make it have good wear resistance.

The finer the zirconia powder is, the greater the activity is, which can promote the sintering, and the higher the strength of the zirconia ceramics is. The small particles can also disperse the stress concentration at the grain boundary caused by the different linear expansion coefficients of corundum and glass, and reduce the risk of cracking. fine grains can also hinder the development of microcracks, not easy to transgranular fracture, help to improve fracture toughness, but also improve wear resistance.

3. Effect of sintering on the properties of ceramics

To put it simply, the sintering of ceramics is the densification process of ceramic blanks at high temperatures. With the increase of temperature and time, the bond occurs between the powder particles, the strength of the sintered body increases, the aggregate of the powder particles is transformed into a strong polycrystalline sintered body with a certain microstructure, and the required physical and mechanical properties of products or materials are obtained. The densification rate and final structure of the sample often reflect what kind of heat treatment it has experienced.

The above are the main factors that affect the properties of ceramics analyzed by Ming Rui. If we want to make zirconia ceramics with excellent properties, we should improve them from the aspects of ceramic forming method, raw material particle size, and sintering.

Mingrui Ceramics has many years of experience in the production process of zirconia ceramics. We can custom high-performance zirconia ceramic parts for you. Feel free to inquire anytime.