Zirconium oxide (ZrO2), known also as “zirconia”, has the highest strength and toughness at room temperature of all the advanced ceramic materials in addition to high resistance to corrosion, wear, and abrasion. Zirconia is also highly biocompatible. In nature, zirconia occurs as the mineral baddeleyite. 

Micro Ceramics provides parts made of zirconium for a wide range of applications, including: dental crowns and bridges, medical prostheses, precision ball valve, pump seals, oxygen sensors, fuel cell membranes, metrology components, bearings, bushes, and drive shafts.

Key zirconia properties:

  • High fracture toughness (5-8 MPam1/2 )
  • High density (5.6 to 6.0 g/cm3)
  • High hardness and wear resistance
  • Good frictional behavior
  • High temperature capability up to 2,400ºC
  • Non-magnetic
  • Low thermal conductivity (3 W/ mK @ 25°C) 
  • Electrical insulation
  • Coefficient of thermal expansion similar to iron (10.0 – 10.8 ×10-6/℃)
  • Modulus of elasticity similar to steel (200 – 220 GPa)

See properties table for more information.