Grade A Lava vs. Hexagonal Boron Nitride
Grade A lava belongs to the oxide-based engineering ceramics classification, while hexagonal boron nitride belongs to the non-oxide engineering ceramics. There are 11 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.
For each property being compared, the top bar is grade A lava and the bottom bar is hexagonal boron nitride.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 76 to 170 | |
| 21 to 250 |
| Flexural Strength, MPa | 28 to 69 | |
| 18 to 140 |
Thermal Properties
| Maximum Temperature: Corrosion, °C | 1150 | |
| 1140 to 2800 |
| Maximum Temperature: Mechanical, °C | 650 to 1130 | |
| 1030 to 2350 |
| Specific Heat Capacity, J/kg-K | 840 | |
| 840 to 1610 |
| Thermal Conductivity, W/m-K | 2.0 | |
| 29 to 96 |
| Thermal Expansion, µm/m-K | 2.5 to 3.3 | |
| 0.54 to 18 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 MHz | 5.3 to 5.8 | |
| 4.0 to 4.4 |
| Dielectric Strength (Breakdown Potential), kV/mm | 3.2 to 3.9 | |
| 61 to 200 |
Otherwise Unclassified Properties
| Density, g/cm3 | 2.3 to 2.5 | |
| 1.9 to 2.1 |
Common Calculations
| Thermal Diffusivity, mm2/s | 1.0 | |
| 9.9 to 34 |