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Product Name: 5n-6n germanium dioxide
Other name:germanium oxide, germania
CAS No.:1310-53-8
Standard: GB/T11071-2006
Appearance: white powder
Purity:99.9999%
Size:according to customer's request.
Application: The refractive index and optical dispersion properties of germanium dioxide makes it useful as an optical material forwide-angle lenses and in optical microscope objective lenses. It is transparent in infrared.
A mixture of silicon dioxide and germanium dioxide ("silica-germania") is used as an optical material for optical fibers andoptical waveguides. 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.
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.
Germanium dioxide is used in algaculture as an inhibitor of unwanted diatom growth in algal cultures, since contamination with the comparatively fast-growing diatoms often inhibits the growth of or outcompetes the original algae strains. GeO2 is readily taken up by diatoms and leads to silicon being substituted by germanium in biochemical processes within the diatoms, causing a significant reduction of the diatoms' growth rate or even their complete elimination, with little effect on non-diatom algal species. For this application, the concentration of germanium dioxide typically used in the culture medium is between 1 and 10 mg/l, depending on the stage of the contamination and the species.
Packing:After packing by polyester films, then packaged in plastic films or glass tubes in vacuum.
Delivery Time: 10 days
