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Product Parameters
Physical Properties | ||||
Germanium | Density | 5.325/cm3 | ||
Hardness | 800kg/cm2 | |||
Young's Modulus(Gpa) | ||||
100 | 103.3 | |||
110 | 138 | |||
111 | 155.5 | |||
Thermal Conductivity | 59.9 | |||
Thermal Expansion Coefficient | 6.0 x10-6 | |||
Specific Heat Capacity | 322 | |||
Dielectric Constant | 16 | |||
Melting Point | 937.4℃ | |||
Crystal Structure | Monocrystalline 1 Polycrystalline | |||
Purity | >99.999% | |||
Conductivity Type | N | |||
Resistivity | 0.005-50 Ω • CM | |||
Poisson's Ratio | 0.278 | |||
Modulus of Rupture ( Mpa) | 72.4 | |||
Surface Finish | Ramax 0.2 μm to 4.0 μm | |||
Optical Properties | ||||||||
Germanium | Transmission Spectrum, ( μm) | 2-14 μm | ||||||
Temperature Coefficient of Refractive Index | 400x10-6 | |||||||
Refractive Index | 4.0052 | |||||||
Refractive Index Homogeneity | ≤1.0+10-4 | |||||||
Absorption Coefficient @ 10.6 μm | ≤0.035 | |||||||
Transmittance | ||||||||
Resistivity | Wavelength Range | Transmittance | ||||||
1.1-1.3 Ω | 2-11.5 μm | 43.92%-46.47% | ||||||
1.3-1.6 Ω | 2-11.5 μm | 44.40%-47.54% | ||||||
1.4-1.5 Ω | 2-11.5 μm | 44.31 %-46.22% | ||||||
2.9-3.3 Ω | 2-11.5 μm | 44.69%-46.25% | ||||||
3.0-3.8 Ω | 2-11.5 μm | 45.31 %-46.73% | ||||||
4.4-4.8 Ω | 2-11.5 μm | 44.64%-46.52% | ||||||
7.0-19 Ω | 2-11.5 μm | 45.20%-46.20% | ||||||
17.7-17.9 Ω | 2-11.5 μm | 46.08%-46.70% | ||||||
Silicon | 24-32 Ω | / | 51.19%-52.11% | |||||
38.2-38.9 Ω | / | 52.48%-53.71% | ||||||
Formats/Sizes/Tolerances （mm) | ||||||||
Ge Disks | Diameter | Mono Crystal | 3-320 | |||||
Poly Crystal | 3-400 | |||||||
Diameter Tolerance | ≤ 0.05 | |||||||
Minimum Thickness | 0.3 | |||||||
Maximum Thickness | 75 | |||||||
Thickness Tolerance | ≤0.05 | |||||||
Ge Rectangular | Maximum Size | 250x250 | ||||||
Tolerance | 0.1 | |||||||
Minimum Thickness | 0.1 (Φ < 100 ) | |||||||
Thickness Tolerance | 0.02 | |||||||
Ge Lenses | Diameter | 7-360 | ||||||
Diameter Tolerance | 0.04 | |||||||
The Radius of Curvature Tolerance | Δ Sag < 0.005 | |||||||
Center Thickness Tolerance | ≤ 0.03 | |||||||
Edge Thickness Variation (ETV) | ≤0.03 | |||||||
Properties
Germanium belongs to the first Ⅳ main group elements with the structure of the diamond. Germanium have excellent physical and chemical properties, its main applications in semiconductor materials, infrared optical materials, chemical catalyst, medical applications and other fields, especially used as a kind of excellent infrared optical material.
High purity germanium has a high refractive index and is high transparency to infrared radiation. It can not pass through visible and ultraviolet ray.
Germanium has excellent transmission across 2-14um waveband and can be used in both mid-wave infrared and long-wave infrared systems.
When Germanium is used as an infrared material, it can be produced to Optical Grade Germanium blank, windows, lenses which is used in Infrared detection and imaging system
High purity germanium has a high refractive index and is high transparency to infrared radiation. It can not pass through visible and ultraviolet ray.
Germanium has excellent transmission across 2-14um waveband and can be used in both mid-wave infrared and long-wave infrared systems.
When Germanium is used as an infrared material, it can be produced to Optical Grade Germanium blank, windows, lenses which is used in Infrared detection and imaging system
Application
Germanium Single crystal products include solar grade germanium single crystal, infrared grade germanium single crystal and detector grade germanium single crystal.
Infrared grade Germanium single crystal is most widely used infrared optical lens and infrared optical window which protect infrared optical lens in thermal-imaging systems.
60% of middle and low infrared optical lenses and 50% of high-end infrared optical lenses are made by Germanium single crystal. Germanium materials are widely used in infrared lenses.
Civil infrared window is mainly used in a variety of monitoring thermal imager, night assistance pilot. The civil domain mainly uses in the security, the civil vehicle, the civil vessel, the civil aircraft and so on.
Germanium metal and related products
1, Solar grade germanium wafers
2, Germanium monocrystals (Polycrystal)
3, Germanium dioxide (GeO2)
4, Organic germanium
5, Zone melting germanium ingots
2, Germanium monocrystals (Polycrystal)
3, Germanium dioxide (GeO2)
4, Organic germanium
5, Zone melting germanium ingots
6, Germanium granule
Technical parameter of Germanium optical grade Monocrystals/Polycrystals
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