pbn
Item | Unit | ||
Apparent Density | g/cm3 | 2.15-2.19 | |
Gas permeability(He) | cm3/s | <1*10-10 | |
Micro hardness(Knoop) | N/mm2 | 691.88(a-b plane) | |
Tensile strength | N/mm2 | 153.86(parallel) | |
Bending strength | N/mm2 | 243.63(parallel) | 197.76(parallel) |
Modulus of elasticity | N/mm2 | 235690 | |
Specific heat capacity | Cal/g.℃ | 0.371(@200℃) | 0.442(@ 900℃) |
Thermal conductivity 200℃ | W/cm.k | 0.6(parallel) | 0.026(perpendicular) |
Thermal conductivity 900℃ | W/cm.k | 0.4370(parallel) | 0.028(perpendicular) |
Dielectric Strength(RT) | KV/mm | 56 | |
Volume Resistivity | Cm | 3.11*1011 |
BN
Type | 99BN | CBN | ABN | ZBN |
Main Content | BN>99% | BN>98.5% | BN+ALN | BN+ZrO2 |
Binder | B2O3 | CaB2O6 | ALBO3 | B2O3 |
Density(g/cm3) | 1.95-2.0 | 2.0-2.1 | 2.6 | 2.95 |
Flexural strength(Mpa) | 30 | 100 | 200 | 200 |
Compressive strength | 100 | 280 | 350 | 380 |
Electrical Resistivity(ohm.cm) | >10^14 | >10^13 | >10^14 | >10^12 |
Max.Working Temp.(℃) -air | 900 | 900 | 900 | 1000 |
Max.Working Temp.(℃) -insert gas | 2400 | 2400 | 2400 | 1800 |
Max.Working Temp.(℃) -vacuum | 2200 | 2200 | 2200 | 1800 |
Thermal conductivity (W/m.K) | 20 | 35 | 50 | 30 |
Expansion Coefficient 25-1000(10^-6/K) | 1.5 | 2 | 4.5 | 2.5 |