Características e Aplicações da Cerâmica de Zircônia

Material properties

1. High toughness, high bending strength and high wear resistance

Fracture toughness

The high toughness of zirconia ceramics makes it less likely to break or shatter when subjected to impact or stress. This makes it excellent in 

applications that need to withstand high impact loads or frequent use, such as knives, bearings, medical implants, etc., improving the service life 

and safety of the product.

High bending strength

The high bending strength of zirconia ceramics means that it can withstand greater bending stress without breaking or deforming. This is very 

beneficial in applications such as structural parts and mechanical parts that need to withstand high stress, ensuring reliable performance and 

stability in complex environments and reducing the risk of material failure.

High wear resistance

The high wear resistance of zirconia ceramics enables it to maintain its structural integrity and functionality for a long time in friction and wear 

environments. This makes it very suitable for parts that are subject to frequent wear, such as grinding tools, mechanical seals and cutting tools, 

extending the service life of these parts and reducing maintenance costs and downtime.

2. Low thermal conductivity (insulation), thermal expansion coefficient close to that of steel

Low thermal conductivity (insulation)

The low thermal conductivity of zirconia ceramics makes it an excellent thermal insulation material that can effectively block heat transfer. This 

property is particularly important in high-temperature environments, such as thermal insulation layers, thermal shielding, and high-temperature 

structural parts in the aerospace field. It can significantly reduce heat loss, protect key components from thermal damage, and improve the 

energy efficiency of the overall system.

Thermal expansion coefficient close to that of steel

Zirconia ceramics have a thermal expansion coefficient close to that of steel, so they are widely used in the field of structural ceramics to reduce 

cracking or delamination caused by thermal stress and ensure the long-term stability and reliability of the product.

application

1. Structural ceramics

Plunger, valve core ball, guide block, industrial knife, axis and other structural parts

Zirconia ceramics are widely used in the field of structural ceramics due to their excellent material properties. First, their high toughness makes 

them less likely to break when subjected to impact or stress, making them suitable for structural components in high-load and dynamic 

environments, such as mechanical bearings and medical implants, providing excellent service life and reliability. Secondly, zirconia ceramics have 

high flexural strength, which enables them to maintain structural integrity under complex stress conditions, especially in applications that require 

high stress resistance, such as precision instruments and engineering machinery parts. Their high wear resistance further expands their application 

in situations with frequent wear, such as cutting tools, grinding tools, and seals, significantly extending the service life of these components and 

reducing maintenance costs.

In addition, the low thermal conductivity of zirconia ceramics makes it an ideal thermal insulation material, which can be used to protect critical 

structures from thermal damage in high-temperature environments, such as in thermal shielding and thermal insulation layers in the aerospace 

field. At the same time, its thermal expansion coefficient is close to that of steel, which reduces the risk of failure caused by thermal stress when 

used in combination with metals such as steel. This is particularly important in composite materials, coating technology and bonding layers, 

ensuring the long-term stability and reliability of the material. Therefore, the application of zirconia ceramics in structural ceramics not only 

improves product performance, but also broadens the application range of materials in high-performance machinery and industrial fields.

2. Functional Ceramics

Refractory tubes, temperature sensors and other functional ceramic parts

Zirconia ceramics have shown a variety of applications in the field of functional ceramics, mainly due to their excellent high temperature 

resistance and unique electrical properties. First of all, zirconia ceramics have excellent high temperature resistance and can maintain their 

structural stability and functional integrity in extremely high temperature environments, which makes it an ideal material for thermal induction 

tubes and refractory materials. In these applications, zirconia ceramics can effectively resist high temperature erosion, extend the service life of 

equipment, and ensure the safety and efficiency of high temperature operations.

In addition, the sensitive electrical properties of zirconia ceramics are also a key factor in their widespread application in functional ceramics. It 

exhibits excellent insulation at low temperatures and partial conductivity at high temperatures. This unique electrical property makes it widely 

used in temperature sensors, oxygen sensors, and solid oxide fuel cells (SOFCs). In these devices, zirconia ceramics can accurately sense and 

respond to temperature changes, providing reliable electrical performance parameters, thereby supporting efficient energy conversion and 

precise environmental monitoring. Therefore, the application of zirconia ceramics in the field of functional ceramics not only improves the 

performance of various devices, but also promotes the technological advancement of advanced materials in high-temperature environments.

Technological innovation and advantages

1. Technological innovation: "Zirconium oxide ceramics (magnesium stabilized)"

The performance of zirconia ceramics has been significantly improved by the introduction of magnesium stabilizers. Magnesium Stabilized 

Zirconia (MgO-ZrO₂) is an innovative material that overcomes the limitations of traditional zirconia ceramics in extreme high temperature 

environments and exhibits excellent high temperature stability and mechanical strength.

Higher operating temperature

One of the biggest advantages of magnesium-stabilized zirconia ceramics is that its maximum operating temperature in an oxygen environment 

reaches an astonishing 2100°C, which is 2.5 times that of traditional zirconia ceramics. This makes it perform better in extreme high-temperature 

applications, especially in aerospace, energy, metallurgy and other fields that need to withstand extremely high temperatures, showing 

unparalleled advantages.

Enhanced compressive strength

Through magnesium stabilization technology, the compressive strength of zirconia ceramics has also been significantly enhanced to an additional 

500 MPa. This feature makes magnesium-stabilized zirconia ceramics more widely applicable in applications requiring high strength and pressure 

resistance, and can withstand higher mechanical stress.