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Hitachi

Hitachi High-Tech GLOBAL

Parameter Units LaB6
Stoichiometry N/A ~6
Metal Impurities ppm by wt. <30
Density g/cm3 4.72
Coefficient of Thermal expansion α × 10^6 5.6
Electrical Resistivity µΩ-cm ~50
Effective Work Function (100) at 1800 K eV 2.8
Absolute Work Function (100) at 300 K eV 2.6
Spectral Emissivity at 0.65 microns N/A 0.765
Evaporation rate at 1800 K (UHV) g/cm2/s 2.2 × 10^-9
Orientation limit for specific orientation degrees <2
Pyrolitic block mount resistance @ 1800 K Ω 1.45
Clamping pressure of SMVM MPa 34.5
Yield of finished cathodes N/A >95%