Comparison of properties of zirconia and alumina

Release time：

2022-11-23 14:22

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

The atoms of ceramic materials are combined by covalent bonds and ionic bonds, while metal materials are combined by metal bonds, so ceramic materials and metal materials have completely different properties. Ceramic materials have great deformation resistance to shear stress at room temperature and have high hardness. Since ceramic crystals are composed of cations and anions and the chemical bonds between them. The directional chemical bonds, low atomic packing density, and large atomic spacing make ceramics show great brittleness and many defects caused by processing. Therefore, they are typical difficult-to-process materials. It is very important to develop efficient and low-cost processing technologies.

Nowadays, the ceramic industry has developed rapidly in all walks of life. Industrial ceramics have been widely used in many fields in recent years with their superior characteristics. Among them, zirconia ceramics and alumina ceramics are common. The characteristics of these two types of ceramics have their own strengths, and many companies do not know how to choose.

1. Density comparison

The density of zirconia ceramics is twice that of alumina ceramics, and the compressive performance of zirconia is better.

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, and the density of zirconia structural parts is 6. The texture is more delicate. After grinding, the surface finish is higher, up to 9. Above,.

3. Comparison of surface finish:

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

4. Comparison of ceramic toughness

The toughness of zirconia is 4 times that of alumina ceramics. At the same time, when the zirconia ceramics are freely dropped from a height of one meter, there will be some gaps, and the alumina will shatter.

How to carry out quality inspection of zirconia ceramic materials

What are the mechanical properties of zirconia ceramics

What are the application fields of zirconia ceramic parts

Zirconia ceramic parts have the characteristics of high strength, high hardness, low density, low coefficient of expansion, wear resistance, heat insulation, corrosion resistance, good chemical stability, and excellent electrothermal performance. New materials in chemical, machinery manufacturing and other fields.

07-13

2022

Selection method of zirconia beads

The larger the specific gravity of zirconia beads, the higher the grinding efficiency. High viscosity slurry should use beads with large specific gravity, such as grinding offset printing ink box inkjet ink, generally use Φ0.2-Φ0.8 zirconia beads.

07-13

2022