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Grade A Lava vs. Zirconia

Both grade A lava and zirconia are oxide-based engineering ceramics. There are 13 material properties with values for both materials. Properties with values for just one material (11, 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 grade A lava and the bottom bar is zirconia.

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 76 to 170
1260 to 3080
Flexural Strength, MPa 28 to 69
630 to 970
Tensile Strength: Ultimate (UTS), MPa 6.9 to 21
410 to 450

Thermal Properties

Maximum Temperature: Mechanical, °C 650 to 1130
500 to 1330
Specific Heat Capacity, J/kg-K 840
400 to 510
Thermal Conductivity, W/m-K 2.0
2.2 to 4.3
Thermal Expansion, µm/m-K 2.5 to 3.3
8.8 to 9.5

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 MHz 5.3 to 5.8
28
Dielectric Strength (Breakdown Potential), kV/mm 3.2 to 3.9
7.7 to 9.0

Otherwise Unclassified Properties

Density, g/cm3 2.3 to 2.5
5.7 to 6.0

Common Calculations

Strength to Weight: Axial, points 0.77 to 2.5
19 to 22
Strength to Weight: Bending, points 3.2 to 7.3
21 to 23
Thermal Diffusivity, mm2/s 1.0
0.73 to 1.8