Hexagonal Boron Nitride vs. Low Expansion Glass-ceramic
Hexagonal boron nitride belongs to the non-oxide engineering ceramics classification, while low expansion glass-ceramic belongs to the glass and glass-ceramics. There are 13 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 hexagonal boron nitride and the bottom bar is low expansion glass-ceramic.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 14 to 60 | |
| 83 |
| Flexural Strength, MPa | 18 to 140 | |
| 35 |
| Poisson's Ratio | 0.11 | |
| 0.22 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 1030 to 2350 | |
| 690 |
| Specific Heat Capacity, J/kg-K | 840 to 1610 | |
| 800 |
| Thermal Conductivity, W/m-K | 29 to 96 | |
| 1.5 |
| Thermal Expansion, µm/m-K | 0.54 to 18 | |
| 1.7 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 MHz | 4.0 to 4.4 | |
| 5.7 |
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 13 to 15 | |
| 11 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.9 to 2.1 | |
| 2.4 |
Common Calculations
| Stiffness to Weight: Axial, points | 4.1 to 18 | |
| 19 |
| Stiffness to Weight: Bending, points | 42 to 69 | |
| 59 |
| Thermal Diffusivity, mm2/s | 9.9 to 34 | |
| 0.76 |