Description

CNGE cut Germanium Blank into any valid shape as required and all surfaces can be fine ground. The blanks can be made of infrared materials such as germanium, silicon, ZnSe, CaF2, BaF2, MgF2, and so on. We can customize different sizes as per PO instructions. The production process is very strict to ensure extremely accurate dimensions and high purity without contamination. Packed in vacuum plastic bags to ensure purity and damage-free transportation.

Technical Data

Diameter(mm)	12-380	Surface roughness	Ramax0.2um to 4.0μm
Length(mm)	As required	Crystal purity	5N, 6N
Resistivity(Ω·cm)	0.005-50, ≥50	Density(g/cm3)	5.33
Resistivity heterogeneity	10%	Hardness(kg/cm2)	800
Crystal orientation	111	Poisson’s ratio	0.28
Crystal orientation deviation	0.5º	Thermal conductivity(Wm-1k-1)	59
Crystal form	N ype (P type is OK)	Thermal expansivity(10ˉ6/℃ˉ1)	6.1
Refractive index(10.6µm)	4.0052	Specific heat Cal/(g.k)	0.074
Absorption coefficient(10.6µm)	<1×10ˉ4	Melting Point(℃)	937

Content of Key impurities (ppm weight)

Element	Standard	Element	Standard
Mg	—	Ni	1.0
Al	2.0	Cu	2.0
Si	—	Zn	—
Cr	—	As	1.0
Fe	2.0	In	—
Co	1.0	Pb	1.0

Application

Germanium Blank is used for making infrared germanium lens.

Packaging, transportation and storage

Packaging: inner vacuum bags and wrapped in poly-foam box, carton box outside.
Transportation: by Fedex, DHL, UPS with door to door delivery, by Air for urgent order.
Storage: store germanium blank in a dry, clean environment to avoid damage and pollution.