Alumina is the leading material among Technical Ceramics and is the most commonly and widely used due to its superior versatile qualities such as material properties, ease of manufacture, wide availability and economic prices.
Zirconia offers the highest flexural strength, fracture toughness, thermal expansion and the lowest thermal conductivity of all oxide ceramics. Its thermal expansion is similar to that of steel, which has a positive effect on force-locked connections with metal parts thus reducing thermal stresses. These properties make zirconia a popular construction material for design engineers.
Silicon carbide exhibits numerous exceptional properties. Its unique potential for various applications is convincing: it is erodible, resistant to wear and corrosion up to the high-temperature range, has high thermal conductivity and is toxicologically harmless. SSiC exhibits impressive temperature shock resistance (ΔT 400K) and maximum use temperatures under protective gas (1,800°C).
A combination of excellent material properties makes silicon nitride the ideal material to meet extreme requirements: high wear resistance, high thermal shock resistance, high thermal stress parameters, elevated use temperatures, low density, high fracture toughness, strength and resulting high edge strength (insensitive to impacts and shock stresses).
Mixed ceramics are materials that consist of a combination of zirconium oxide and aluminum oxide to produce advanced materials combining the high strength and impact resistance of zirconia with the hardness of alumina. In contrast to ATZ ceramics, the percentage share of alumina in ZTA ceramics is higher than that of zirconia.