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Zirconia (ZrO2) Ceramics

Zirconia ceramic, also known as zirconium oxide (ZrO2), is a white crystalline oxide of zirconium. Its most naturally occurring form is the mineral baddeleyite with a monoclinic crystalline structure. Zirconium oxide ceramics have the highest toughness and strength at room temperature of all advanced ceramic materials. It also has a high thermal expansion, low thermal conductivity, and high resistance to corrosion. Its unique resistance to crack propagation and high thermal expansion make it an excellent material for joining ceramics and metals such as steel.

Read more: Zirconium Oxide Ceramic & Its Uses

Zirconia Properties:

  • High mechanical resistance
  • Low thermal conductivity
  • High-temperature resistance and expansion
  • Chemical resistivity



Zirconia Ceramics Structures

There are three types of crystal structures of zirconia ceramics: cubic crystal,  tetragonal and monoclinic. Pure zirconia is monoclinic (m), under ambient conditions. With increasing temperature, the material transforms to a tetragonal crystal structure (t) at ∼1170 °C and then to a cubic crystal structure (c), followed by a fluorite structure at ∼2370 °C with melting at 2716 °C.

Zirconia Ceramics Specification

Material Zirconia
Properties Units ZrO2
Color - Ivory & White
Permeability - Gas-tight
Density g/cm3 5.89
Straightness - 1‰
Hardness Mohs Scale 8.5
Water Absorption - 0
Flexural Strength(Typical 20℃) Mpa 1200
Compressive Strength
(Typical 20℃)
Mpa 5700
Coefficient of Thermal Expansion
(25℃ to 800℃)
0-6/℃ 10
Dielectric Strength (5mm Thickness) AC-kv/mm -
Dielectric Loss
- 0.001
Dielectric Constant 25º C@1MHz 29
Volume Resistivity (20℃)
Ω·cm³ >10^13
Long-term Operating Temperature 2200
Thermal Conductivity (25℃) W/m·K 3

Zirconia Ceramics Application

ACM Ceramic Product Video

Your Zirconia Ceramics Supplier

Advanced Ceramic Materials (ACM) is a leading supplier of zirconia ceramic products of the highest quality for a wide range of applications. We are happy to provide advice on materials, design, and application. Feel free to contact us with any questions about ZrO2 or other ceramic materials that are not listed on the website. 




Q: What Are Different Forms of Stabilized Zirconia?
A: Yttria stabilized zirconia - It is formed in a bid to stabilize the cubic crystal structure of zirconium dioxide at room temperature. To stabilize the crystal cubic structure of zirconium dioxide, manufacturers add yttrium oxide which is also known as yttria. Magnesia Stabilized Zirconia - It is even more temperature resistant than yttria-stabilized zirconia and has a lower thermal conductivity. Magnesia stabilized zirconia is a strong, tough, wear-resistant, and corrosion-resistant material. Calcia-Stabilized Zirconia - It is a form of stabilized zirconia formed by adding calcium oxide to zirconium dioxide. Its melting point is approximately 2700 °C and its density is about 5.6 g/cm3. Calcia-stabilized zirconia is usually used in making refractory materials. It is known to improve the density, thermal shock resistance, and corrosion resistance of such materials. It is also popularly used as a coating. Ceria Stabilized Zirconia - When it comes to resistance to moisture, ceria-stabilized zirconia is a better option than magnesia-stabilized zirconia as well as yttria-stabilized zirconia. It is commonly used as a component of sensors, fluid control systems, and pumps. Ceria-stabilized zirconia has high strength, corrosion resistance, and high-temperature resistance.
Q: Can Zirconia Ceramics Be Used at High Temperatures?
A: Yes. Zirconia has excellent chemical inertness and corrosion resistance at temperatures well above the melting point of alumina. There are many grades of zirconia ceramics with different purity, and it can work in an environment of more than 1400 degrees. In theory, it can maintain its original characteristics under high temperature and low temperature conditions.
Q: Which Is More Wear-Resistant, Zirconia Ceramics or Alumina Ceramics?
The hardness of zirconia ceramics is ≥HRA9, second only to the hardness of diamond, and its smooth surface has a small friction coefficient, which is an ideal material for wear-resistant products, especially in high-temperature oxidizing media or corrosive media. Further Reading: Performance Comparison between Zirconia Ceramics and Alumina Ceramics
Q: What Are the Forming Processes of Zirconia Ceramics?
A: At present, there are many special zirconia ceramic forming processes, including dry pressing, hot die casting, grouting, injection molding, isostatic pressing, etc. Among them, isostatic pressing ceramic parts are the best.
Q: Do You Supply Customized Zr O2 Ceramic Components?
A: We can supply customized products according to the drawings you provide, and our engineers can also provide technical support and advice for your design.
Zirconium Oxide Ceramic Safety Data Sheet
Product name : Zirconium(IV) oxide Brand : ACM CAS-No. : 1314-23-4
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