Zirconia vs. High-alumina Refractory

Both zirconia and high-alumina refractory are oxide-based engineering ceramics. There are 8 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is zirconia and the bottom bar is high-alumina refractory.

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Material Properties

Density, g/cm³		5.7 to 6.0
Density, g/cm³		2.1

Flexural Strength, MPa		630 to 970
Flexural Strength, MPa		28

Maximum Temperature: Mechanical, °C		500 to 1330
Maximum Temperature: Mechanical, °C		1200

Maximum Thermal Shock, °C		300 to 350
Maximum Thermal Shock, °C		210

Specific Heat Capacity, J/kg-K		400 to 510
Specific Heat Capacity, J/kg-K		800

Thermal Conductivity, W/m-K		2.2 to 4.3
Thermal Conductivity, W/m-K		1.5

Thermal Diffusivity, mm²/s		0.73 to 1.8
Thermal Diffusivity, mm²/s		0.87

Thermal Expansion, µm/m-K		8.8 to 9.5
Thermal Expansion, µm/m-K		4.3

Zirconia vs. High-alumina Refractory

Material Properties

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