Zirconia Toughened Alumina

Zirconia Toughened Alumina filter component -- used where harsh environments require exceptionally tough materials.

Zirconia Toughened Alumina — ZTA
Zirconia toughened alumina is a composite ceramic material comprising alumina and zirconia. This material provides added strength and thermal shock resistance over alumina but at less cost than zirconia.

ZTA composites are commonly used in structural applications, cutting tools, and medical applications. Additionally, ZTA composites feature high strength, fracture toughness, elasticity, hardness, and wear resistance.

Primary Features

  • Improved strength over alumina
  • Impact resistance
  • Thermal resistance
  • Improved hardness


  • Wear components
  • Pump components
  • Valves
  • Impellers
  • Particulate abrasion components

Nozzle component made from zirconia toughened alumina for use in harsh environments including oil & gas, petrochemical, and more.Zirconia toughened aluminum oxide components used for exceptionally harsh environments and high-performance equipment with the need for extreme durability


  • KMT-ZTA85 — 85% AlN (white)

Material Properties for KemaTek Zirconia Toughened Alumina

Properties Units Test Zirconia Toughened Alumina
Material Name KMT-ZTA85 — 85% Al2O3 (white)
Color white
Primary Material Content 85% Al2O3
Characteristics Enhanced fracture toughness, good mechanical strength, wear, and corrosion resistance
Applications Wear and heat resistant components where mechanical strength is needed at high operating temperatures
Bulk Density g/cc ASTM-C20 4.15
Water Absorption % ASTM-C373 0
Vickers Hardness (Load 500 g) GPa ASTM-C1327-03 16.0
Flexural Strength MPa ASTM-C1161-02c 500
Compressive Strength MPa ASTM-C773 2580
Young’s Modulus of Elasticity GPa ASTM-C1198-01 337
Poisson’s Ratio ASTM-C1198-01 0.23
Fracture Toughness MPa * m12 ASTM-C1421-01b (Kevron notched beam)
Coefficient of Linear Thermal Expansion, 40-400 ℃ x 10-6/℃ ASTM-C372-94 7.0
Thermal Conductivity, 20℃ W/(m • K) ASTM-C408-88 24
Specific Heat J/(Kg • K) x 103 ASTM-E1269
Thermal Shock Resistance Note 1
Volume Resistivity, 20℃ Ω • cm ASTM-D257-99
Dielectric Strength KV/mm ASTM-D149-97
Dielectric Constant, 1 MHz ASTM-D150-98 (1 MHz)
Loss Tangent (x 10-4 ASTM-D150-98 (1 MHz)

Technical ceramics material properties chart
Ceramic Materials Properties Chart — All Materials — PDF, 128K

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