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Sell Germanium material

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  • Company Name :Ningbo Lambert Optics Co., Ltd
  • Membership :Free member
  • Registrarion Date :2016. 12. 30
  • CountryRegion:China
  • Address:NO.399, 66th building, zhuangxijiayuan, hengjie town Ningbo Zhejiang, China
  • Phone / Fax:86-0574-87166171  /  86-0574-87121375
  • Contact:Tony Zhou
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Germanium is a versatile infrared material commonly used in imaging systems and instruments in the 2 to 12 microns spectral region. It is used as a substrate for lenses, windows, and output couplers for low-power CW as well as pulsed TEA, CO2 lasers. The lowest absorbing Ge optics are limited to a throughput power range of 50 to 100 watts before thermal lensing or thermal runaway. These problems are minimized by properly heatsinking the optic and carefully cleaning contaminated optical surfaces.


Crystal Type  cubic , diamond structure
Transmission Range  1.8-23μm
Refractive Index  4.0034 when 9.72μm
4.0028 when 10.6μm
Reflective Loss  52.9% when 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) when 25℃
Thermal Expansion  5.5ⅹ10 /K ,6.1ⅹ10 /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 when 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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  • Sell Germanium material

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