Ceramic Knowledge / FAQ

As bearing material types become increasingly diverse, each finished product offers its own set of advantages. This article provides an individual introduction to the characteristics of bearings made from three types of materials: metal, engineering plastics, and ceramics.

In the context of the development of automotive intelligence, ceramic materials play an increasingly important role in the intelligent development of new energy vehicles. As the foundation of the entire technology stack, continuous innovation in materials technology is essential for supporting the efficient development of the industry as a whole.

Stable zirconia doped with yttrium has good comprehensive properties and is the most widely used solid electrolyte at present. Stable zirconia doped with magnesium oxide has general conductivity and low price, but its long-term performance is poor and is generally used as consumables.

Pyrolytic boron nitride is a new type of ceramic material prepared by chemical vapor deposition (CVD), while hot-pressed boron nitride is prepared by high temperature sintering processes such as pressureless sintering, hot pressing sintering and hot isostatic pressing sintering.

Hot-press sintering is generally considered an ideal sintering method, yielding ceramics with high density, strength, and mature production processes, thus finding widespread applications. The other variation is pyrolytic boron nitride (PBN), prepared using chemical vapor deposition (CVD) techniques. Let's compare these two by focusing on hot-pressed boron nitride and pyrolytic boron nitride.

There are many types of ceramic bearings available that offer numerous advantages over traditional bearing components. Two common ceramic materials used for bearing applications are silicon nitride (Si3N4) and zirconia (ZrO2).

Zirconia ceramic is a kind of ceramic material made from zirconia (ZrO2). The material has many characteristics, including chemical inertness, high thermal expansion, highzirconium oxide blade abrasion resistance, crack growth resistance, excellent heat insulation, low thermal conductivity and so on. Meanwhile, due to the ceramic blade is sintered from zirconia, it determines its brittleness and low toughness.

Zirconia is one of inorganic non-metal materials which has excellent performance on high temperature resistance, corrosion resistance and wear-resistance, and has been widely used in various areas.

Due to excellent hardness, mechanical strength and heat dissipation, both silicon nitride ceramic and aluminum nitride ceramic can be produced into ceramic substrates which are used for electronic capsulation, meanwhile, they are also different in properties and advantages.