What are the advantages of zirconia ceramics compared with alumina ceramics?

Zirconia ceramic is a material with high crack growth resistance, it has a high coefficient of thermal expansion, so it is often used to make metallized ceramics. Zirconium oxide is an excellent ceramic material, which has two outstanding properties of low thermal conductivity and high strength. It is widely used, can be used as a wire forming mold, can be used as an auxiliary material in the welding process, and it is often an ideal choice for insulating rings in high-temperature environments.

The atoms of the ceramic material are combined by covalent bonds and ionic bonds, and the metal materials are combined by metal bonds, so the ceramic material and the metal material have completely different properties. The ceramic material has great resistance to shear stress deformation at normal temperature, and its hardness is very high. Since ceramic crystals are composed of cations and anions and the chemical bonds between them, the chemical bonds have directionality, low atomic packing density, and large interatomic distance, which makes the ceramic show great brittleness and many defects caused by processing, so it is typical Difficult to process materials, it is very important to develop efficient and low-cost processing technology.

The ceramic industry has developed rapidly in all walks of life. Industrial ceramics have been widely used in many fields in recent years due to their superior characteristics. Among them, zirconia ceramics and alumina ceramics are common. The characteristics have their own advantages, many companies do not know how to choose, today I will introduce to you:

1. Density comparison

The density of zirconia ceramics is twice that of alumina ceramics. In contrast, zirconia has better compression resistance.

2. Density comparison:

The density of zirconia ceramic structural parts is higher than that of alumina ceramics, the density of alumina ceramics is 3.5, the density of zirconia structural parts is 6, the texture is more delicate, and the surface finish is higher after grinding. 

3. Comparison of surface finish:

The surface finish of the zirconia structural parts is higher, mirror-like, smooth, and the friction with the net is smaller, which can further increase the service life of the net, reduce the net consumption, reduce the current of the net part, and reduce the power consumption. In addition, the toughness of zirconia ceramics is good, overcoming the inherent brittleness of the ceramic itself, the wear resistance is higher, the service life of the product is greatly extended, and the quality of the paper is obviously improved.

4. Comparison of ceramic toughness

The toughness of zirconia is 4 times that of alumina ceramics. At the same time, zirconia ceramics that fall freely from a height of one meter will only have some gaps, and the alumina will be broken.