What Properties are Different Between Zirconia and Alumina?

  • 十月 10, 2020

Zirconia ceramics is a material with high resistance to crack propagation, and it has a high coefficient of thermal expansion, so it is often used to make metalized ceramics. Zirconia is an excellent ceramic material, which has both outstanding properties of low thermal conductivity and high strength. It has a wide range of applications and can be 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 environments.
The atoms of ceramic materials are combined through covalent bonds and ionic bonds, while metal materials are combined through metal bonds, so ceramic materials and metal materials have completely different properties. Ceramic materials have great resistance to shear stress deformation at room temperature and have high hardness. Since ceramic crystals are composed of cations and anions and the chemical bonds between them, the chemical bonds have directional properties, low atomic packing density and large atomic spacing, which makes ceramics show great brittleness and many defects caused by processing, so they are typical For difficult-to-process materials, it is very important to develop efficient and low-cost processing technology.
 

 
Nowadays, the ceramic industry has been developing 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. These two types of ceramics Each has its own strengths, and many companies don’t know how to choose. Today, the editor of Shanghai Zhimo 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 the zirconia ceramic structure is higher than that of the alumina ceramic. The density of the alumina ceramic is 3.5, and the density of the zirconia structure is 6, and the texture is more delicate. After grinding, the surface finish is higher, up to ▽9 the above,.
3. Comparison of surface finish:
Zirconia structural parts have higher surface finish, mirror-like, smooth, and less friction with the net, which can further increase the service life of the net, reduce the net consumption, reduce the current of the paper net, and reduce the power consumption. In addition, the toughness of zirconia ceramics is good, which overcomes the inherent brittleness of the ceramic itself, has higher wear resistance, greatly extends the service life of the product, and significantly improves the quality of the paper.
4. Comparison of ceramic toughness
The toughness of zirconia is 4 times that of alumina ceramics. At the same time, the free fall of zirconia ceramics from a height of one meter will only cause some gaps and the alumina will break.

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