Material
   Crystal Material
   Coating Material
Opticelement
   Spherical Lense
   Cylinder Lense
   Prism
   Windows
Coating
   MIR Coating
   FIR Coating
   UV Coating
   Visible Coating
   NIR Coating
   Optical Assembly
stockproduct
   Windows
   Lenses
   Prism
Adir
   Ad
   IR

Material


GE
        Germanium is a chemical element with the symbol Ge and atomic number 32. It is a lustrous, hard, grayish-white metalloid in the carbon group, chemically similar to its group neighbors tin and silicon.

Detail

 

Crystal Type

cubic , diamond structure

Transmission Range

1.8-23μm

Refractive Index

4.0034 @ 9.72μm

4.0028@10.6μm

Reflective Loss

52.9% @10μm

Density

5.323g/cm

Melting Point

956,959,942,938

Molecular Weight

72.59

Thermal Conductivity

58.61 W/(m K)

Specifics Heat

310J/(kg K) @25

Thermal Expansion

5.510/K ,6.110/K

Hardness (Knoop)

780

Young’s Modulus

102.7<100>,155.3<111>GPa

Shear Modulus

67<100>GPa

Bulk Modulus

77.2GPa

Rupture Modulus

93MPa

Dielectric Constant

16.6@ f=9.37MHz

Solubility Water

Insoluble

Application

Electronics lenses, band pass filters, thermography

Remarks

laser damage threshold:2.9-3.3GW / cm

 

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