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Mullite vs. GM-120 Glass Ceramic

Mullite belongs to the oxide-based engineering ceramics classification, while GM-120 glass ceramic belongs to the glass and glass-ceramics. There are 10 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is mullite and the bottom bar is GM-120 glass ceramic.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 2.7 to 3.0
2.5
Dielectric Strength (Breakdown Potential), kV/mm 16 to 17
11
Elastic (Young's, Tensile) Modulus, GPa 110 to 170
56
Electrical Resistivity Order of Magnitude, 10x Ω-m 10 to 11
10
Flexural Strength, MPa 130 to 160
57
Maximum Thermal Shock, °C 170 to 230
110
Stiffness to Weight: Axial, points 22 to 31
13
Stiffness to Weight: Bending, points 58 to 62
52
Thermal Conductivity, W/m-K 3.5 to 11
3.0
Thermal Expansion, µm/m-K 5.8
9.5