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The use of Germanium Oxide

Time: 2019-10-16

Germanium Dioxide, also called germanium oxide, germania, and salt of germanium,[1] is an inorganic compound with the chemical formula GeO2. It is the main commercial source of germanium. It also forms as a passivation layer on pure germanium in contact with atmospheric oxygen.

The refractive index (1.7) and optical dispersion properties of germanium dioxide makes it useful as an optical material for wide-angle lenses, in optical microscope objective lenses, and for the core of fiber-optic lines. See Optical fiber for specifics on the manufacturing process. Both Germanium and its glass oxide, GeO2 are transparent to the infrared spectrum. The glass can be manufactured into IR windows and lenses, used for night-vision technology in the military, luxury vehicles,[7] and Thermographic cameras. GeO2 is preferred over other IR transparent glasses because it is mechanically strong and therefore preferred for rugged military usage.[8]

A mixture of silicon dioxide and germanium dioxide ("silica-germania") is used as an optical material for optical fibers and optical waveguides.[9] Controlling the ratio of the elements allows precise control of refractive index. Silica-germania glasses have lower viscosity and higher refractive index than pure silica. Germania replaced titania as the silica dopant for silica fiber, eliminating the need for subsequent heat treatment, which made the fibers brittle.[10]

Germanium dioxide is also used as a catalyst in production of polyethylene terephthalate resin,and for production of other germanium compounds. It is used as a feedstock for production of some phosphors and semiconductor materials.

Product recommendation:Germanium

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