market@mpasapphire.com
+86 25 8320 2951 / 8320 2950
English 简体中文
Material Information
Germanium
Germanium has high refraction index, very good material for infrared windows, lenses and prisms in thermal imaging systems, image tracking, infrared forward vision and night vision devices.
Germanium
    Publish time 2020-07-29 21:53    
Germanium
Germanium Transmission 

Germanium Properties

Germanium has high refraction index, very good material for infrared windows, lenses and prisms in thermal imaging systems, image tracking, infrared forward vision and night vision devices. 

Chemical Formula

Ge

Crystal Form

 SingleCrystal

Crystal Class

Cubic

Lattice Constant, Å

5.66

Density, g/cm3 at 300 K

5.33

Dielectric Constant for 9.37 x 109 Hz at 300 K

16.6

Melting Temperature

936 ℃

Thermal Conductivity, W/(m K) at 293 K

58.61

Thermal Expansion, 1/K at 298 K

6.1 x 10-6

Absorption coefficient(1/cm )

1.3x10-3@3.8um

 

3.0x10-3@10.6um

Solubility in water

None

Knoop Hardness, kg/mm2

780

Young's Modulus, GPa

102.7

Shear Modulus, GPa

67.00

Bulk Modulus, GPa

77.2

Poisson's Ratio

0.28

Transmission Range

2-12um