Yttria Overview

Yttria (yttrium oxide, Y2O3) is a rare-earth ceramic which exhibits both exceptional plasma resistance and an aptitude for high-temperature applications. Yttria is often used to stabilize other ceramic compositions like zirconia.

CoorsTek Exyria™ yttria can be formed into both solid parts and coatings for parts requiring exceptional corrosion resistance. Applying a PlasmaResist™ coating to compatible ceramic and metal components creates a corrosively inert barrier of pure yttria.

  • Plasma resistance
  • High stability
  • Heat resistance
  • Various application methods

CoorsTek Formulations

Contact a CoorsTek expert to discuss a custom manufactured Yttria solution for your application.

Properties Units Value
Flexural Strength, MOR (20 °C) MPa 100 - 430
Fracture Toughness, KIc MPa m1/2 1.0 - 4.0

Thermal Conductivity (20 °C)

W/m K 10 - 14
Coefficient of Thermal Expansion 1x10-6/°C 7.9 - 8.2
Maximum Use Temperature °C 2000
Dielectric Strength (6.35mm) ac-kV/mm 16.5
Dielectric Loss (tan δ) 1MHz, 25 °C

4 x 10-4

Volume Resistivity (25°C) Ω-cm 1014 to 1016