MakeItFrom.com
Menu (ESC)

Aluminum Nitride vs. Low Expansion Glass-ceramic

Aluminum nitride belongs to the non-oxide engineering ceramics classification, while low expansion glass-ceramic belongs to the glass and glass-ceramics. There are 14 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is aluminum nitride and the bottom bar is low expansion glass-ceramic.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 330
83
Flexural Strength, MPa 190 to 400
35
Knoop Hardness 1160
530
Poisson's Ratio 0.21 to 0.31
0.22

Thermal Properties

Maximum Temperature: Mechanical, °C 1380
690
Specific Heat Capacity, J/kg-K 780
800
Thermal Conductivity, W/m-K 80 to 190
1.5
Thermal Expansion, µm/m-K 4.2 to 5.4
1.7

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 MHz 6.9 to 28
5.7
Electrical Resistivity Order of Magnitude, 10x Ω-m 10 to 12
11

Otherwise Unclassified Properties

Density, g/cm3 2.9 to 3.3
2.4

Common Calculations

Stiffness to Weight: Axial, points 55 to 63
19
Stiffness to Weight: Bending, points 69 to 80
59
Thermal Diffusivity, mm2/s 31 to 74
0.76