 |
Name | |
Germanium | |
Density [g/cm3] | 5.325 |
Resiitivity | 0.005-50ohm.cm |
Transmission Index | 47@6-14.6um |
Thermal conductivity W/mk | 59.9 |
Thermal expansion coefficient k(-1) | 6.0×10-5/℃ |
Specific Heat Capacity | 322 |
Germanium is a metallic element with high melting point, high hardness, low electrical conductivity and high corrosion resistance. Germanium has an atomic number of 32 and an atomic weight of 72.64. Germanium is a silver-white solid at room temperature and is easily oxidized at high temperatures.
Due to its high melting point and high hardness, germanium has excellent performance in the manufacture of infrared optical components, while germanium can be used for both long-wave infrared and mid-wave infrared, its dispersion characteristics in different wavelength bands change significantly, germanium in the 3 ~ 5 μm Abbe number of 103, in the optical system is generally a negative group; and its Abbe number of 8 ~ 12 μm is 864, in the optical system is generally a positive group.
