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Low Expansion Glass-ceramic vs. Grade A Lava

Low expansion glass-ceramic belongs to the glass and glass-ceramics classification, while grade A lava belongs to the oxide-based engineering ceramics. There are 11 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is low expansion glass-ceramic and the bottom bar is grade A lava.

Metric UnitsUS Customary Units

Mechanical Properties

Flexural Strength, MPa 35
28 to 69
Tensile Strength: Ultimate (UTS), MPa 53
6.9 to 21

Thermal Properties

Maximum Temperature: Mechanical, °C 690
650 to 1130
Specific Heat Capacity, J/kg-K 800
Thermal Conductivity, W/m-K 1.5
Thermal Expansion, µm/m-K 1.7
2.5 to 3.3

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 MHz 5.7
5.3 to 5.8

Otherwise Unclassified Properties

Density, g/cm3 2.4
2.3 to 2.5

Common Calculations

Strength to Weight: Axial, points 6.1
0.77 to 2.5
Strength to Weight: Bending, points 13
3.2 to 7.3
Thermal Diffusivity, mm2/s 0.76