Comparison Between Alumina And Zirconia

Aluminum oxide ceramic is a ceramic material mainly composed of aluminum oxide (Al2O3), which has excellent conductivity, mechanical strength, and high temperature resistance. It is a widely used ceramic. Zirconia ceramic is a type of ceramic material with superior performance, which is resistant to corrosion, high temperature, wear resistance, and is known for its high strength and toughness. It is also widely used.

1. Density comparison

The density of zirconia ceramics is higher than that of alumina ceramics. The density of alumina ceramics is 3.7-3.95g/cm3, and the density of zirconia ceramics is 6g/cm3, making the texture more delicate. After grinding and processing, the surface smoothness of zirconia ceramics is higher, reaching over ▽ 9. At the same time, zirconia ceramics have better compressive performance.

2. Surface finish comparison

Zirconia ceramics have a higher surface finish, a mirror like shape, and are smoother, with relatively less friction between them and other accessories. In addition, zirconia ceramics have good toughness and overcome the inherent brittleness of ceramics, resulting in higher wear resistance and significantly extended product service life.

3. Comparison of high-temperature resistance performance

Both materials can withstand very high temperatures. Zirconia ceramics can withstand high temperatures below 1100 degrees Celsius, while alumina ceramics can withstand high temperatures between 1600 and 1700 degrees Celsius. Due to its strong high-temperature resistance, alumina ceramics are widely used in high-temperature load-bearing plates and high-temperature furnaces.

4. Toughness comparison

The tensile strength of alumina ceramics is 78 MPa, while the tensile strength of zirconia ceramics is 330 MPa. The toughness of zirconia ceramics is about 4 times that of alumina ceramics. For example, if these two ceramic materials fall freely from a height of one meter at the same time, zirconia ceramics will only leave some gaps, but alumina ceramics will shatter.

5. Comparison of thermal conductivity

At room temperature, the thermal conductivity of zirconia ceramics is 2W/m · k, while that of alumina ceramics is 20W/m · k (20 ℃). In terms of comparison results, zirconia ceramics are thermal insulation materials, while alumina ceramics are thermal conductivity materials.