Chemical inertia

One of the characteristics particular to advanced ceramics is chemical inertia, which means the ability to resist various types of liquid or gaseous chemical influences, but also for some of them, their inertness in the human body.

Description

Resistance to chemical corrosion refers to the ability of a material not to corrode or disintegrate when subject to chemical attack (liquid or gas) at different temperatures.

Advanced ceramics do not all have the same resistance to chemical corrosion, or even to the same chemical agents. Among ceramic materials, aluminium nitride, quartz and glass ceramics are the least resistant to chemical attack. Due to their alumina they can be vulnerable. Alumina-zirconia composites and certain zirconias, silicon carbide and nitride are the most resistant.

Application markets

Of course, advanced ceramics are most widely used in the chemical industries due to their resistance to corrosive liquids and gas. They are mainly used on pump and valve components, fluid management equipment, filtration components, laboratory supplies (crucibles, mortars, etc.). But they are also used in other sectors, such as the aeronautical and spatial, energy and medical instrumentation industries.

Comparative table of properties

  Resistance to chemical corrosion
Alumina (99,5%) ++
Alumina-zirconia composites (ZTA/ATZ) +++

Zirconia

MgO & Y-TZP
+++
Aluminium nitride -
Sintered Silicon carbide ++++
Sintered silicon nitride ++++
Quartz +
Glass-ceramics +

Acceptable: +  ; Good: ++  ;  Very good: +++

These values are for information only and do not constitute a contractual obligation.

Raw material
Finished product

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