Materials > Engineered Ceramics > Zirconia




 Zirconium Oxide is widely used and has superior high temperature properties. When combined with compounds of yttria, strength and fracture toughness can be significantly increased. This makes some grades of Zirconia superior to most materials for abrasion and wear resistance, brittleness, and thermal shock resistance. Zirconia is electrical conductive above 900 °C.

Zirconia engineered ceramic parts can be formed by single axis pressing, isostatic pressing, injection molding, slip casting, or extrusion. Parts can "green machined" to near net size before firing and then "hard" ground using diamond tooling to tolerances less than 0.0002" (0.005 mm). Special grades of Zirconia can be metallized and/or brazed to metal parts. Although the final properties of Alumina ceramics will be determined by the manufacturing method, they generally will have the following properties:


Crystalline Zirconia

CRYSTAL PSZ is tetragonal form for Zirconia crystal, a totally different type of partially stabilized Zirconia. It is tougher, has higher hot strength, is stronger and harder than ceramics or sapphire with lower friction for bearings, wear surfaces and cutting tools.Download PSZ data sheet



CERAFLEX is a special, ultra thin Zirconia in fully or partially stabilized grades used for fuel cells, oxygen sensors, substrates, and instruments.  Go to CEREFLEX Thin Ceramics Page



Zirconia Ceramics

Stabilization     MgO Y203 Y203
Stabilization Percent (mole)   % 5.0 3.0 8.0
Bulk Density 20°C g/cm3 5.70 6.00 5.70
Flexural (bending) Strength 20°C Mpa 620 850 140
Elastic Modulus 20°C Gpa 200 200 -
Hardness 20°C kg/mm2 11.5 12 -
Fracture Toughness 20°C Mpa*m1/2 11 8 -
Porosity 20°C % 0 0 0
Max. Working temp - °C 500 2400 2400
Coef. Thermal Expansion 25-1000°C 10-6 /°C 10.1 10.3 10.5
Thermal Conductivity 20°C W/m°K 2.7 2.2 2.2
Available Forms IsoPres, Die Pres, SlipCast, InjMold



Zirconium(IV) Oxide

Chemical names and formulas:

Formula  ZrO2
Compound formula  O2Zr
Name  Zirconium (IV) oxide
IUPAC name  Dioxozirconium


Structure diagram


3D structure


Basic properties

Molecular weight  123.223 g/mol
Phase  solid (at STP)
Melting point  2700° C
Boiling point  5000° C
Density  5.89 g/cm3


Chemical identifiers

GAS number  1314-23-4
PubChem CID  62395


NFPA label


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