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Zirconia vs. GM-120 Glass Ceramic

Zirconia 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 (12, 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 GM-120 glass ceramic.

Zirconia (Zirconium Dioxide, ZrO2)Mica-Containing Glass-Ceramic (IEC 60672 Type GM-120)
Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 5.7 to 6.0
2.5
Dielectric Strength (Breakdown Potential), kV/mm 7.7 to 9.0
11
Elastic (Young's, Tensile) Modulus, GPa 190 to 200
56
Electrical Resistivity Order of Magnitude, 10x Ω-m 4.5 to 11
10
Flexural Strength, MPa 630 to 970
57
Maximum Thermal Shock, °C 300 to 350
110
Stiffness to Weight: Axial, points 19
13
Stiffness to Weight: Bending, points 33 to 34
52
Thermal Conductivity, W/m-K 2.2 to 4.3
3.0
Thermal Expansion, µm/m-K 8.8 to 9.5
9.5