Zirconia Ceramics (ZrO2)
Tucson, Arizona, USA
Skyline Components, LLC
Zirconia Ceramic is a ceramic material consisting of at least 90% of
zirconium dioxide (ZrO2). It has the highest strength and toughness at
room temperature of all advanced ceramic materials. The fine grain
size allows the ceramic components for extremely smooth surfaces
and sharp edges. Unlike other ceramic materials, zirconia is a
material with very high resistance to crack propagation. It has very high
thermal expansion and can be joined to steel.

Characteristics
  • High density
  • High mechanical strength, such as high fracture toughness,
    flexural strength, hardness and wear resistance. Low
    coefficient of friction
  • Modulus of elasticity similar to steel
  • Low thermal conductivity - 10% of that of alumina ceramics
  • High service temperature - up to 4350ºF (2400ºC)
  • Coefficient of thermal expansion (11ppm/K) similar to that of
    cast iron
  • High chemical resistance to acids and alkalis
  • High resistance to molten metals
  • Oxygen ion conductivity (used for oxygen sensors and high
    temperature fuel cells)
  • Non-magnetic and electrical insulation

Specifications (Y2O3 Stabilized)
Density (g/cm^3)
6.0
Color
Ivory
Porosity (%)
0
Elastic Modulus (GPa)
210
Poisson's Ratio
0.23
Vickers Hardness (GPa)
12
Compressive Strength (MPa)
2000
Flexural Strength (MPa)
1000
Thermal Expansion (ppm/K)
11
Thermal Conductivity (W/m/K)
2.2
Upper Working Temperature (°C)
2400
Volume Resistivity (Ohm-cm)
>10^11
Dielectric Constant (1 KHz)
26
Dielectric Strength (kV/mm)
9
Typical Applications

  • Refractory components
  • Cutting tools, such as knives and blades
  • Engine parts
  • Precision shafts and axles in high temperature
  • Thermocouple protection tubes
  • Fiber optic ferrules and sleeves
  • Oxygen sensors, fuel cells membranes
  • Bearings & rollers
  • Balls and seats for ball valves