Pyrolytic boron nitride (PNB) - Crucible

Lattice constant (µm):  a: 2.504*10^-10   c:6.692*10^-10

Apparent density (g/cm³): 2.0-2.21(board)   2.0-2.17(Crucible)

Helium transmissivity (cm³/s): 1*10^-12

Solidity by microscope (N/mm²): 691.88

Volume resistinity (Ω·cm): 3.11*10¹¹

Tensile strength (N/mm²): 153.86

Bending strength (力 ‖ "C" N/mm²): 243.63

Bending strength (力 ⊥ "C" N/mm²): 197.76

Elasticity modulus (N/mm²):235690

Pyroconductivity (W/m·k) 200℃ “a”direction: 60;  "c" direction:2.60

Pyroconductivity (W/m·k) 900℃ “a”direction: 43.70;  "c" direction:2.80

Dielectric strength (KV/mm):56