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Germanium is the 32nd element of the periodic system D. I. Mendeleev, where indicated by the symbol Ge. Atomic mass 72,59. It is a silvery light metal. The density of 5.33 g/cm3. Opened in the late XIX century chemist Winkler, who named the element after his homeland — Germany. This multiple element of the earth’s crust. In nature it occurs as an impurity in Nickel ores and sediments, silicates, charcoal, peat.
Due to the fragility of the metal is not amenable to pressure treatment up to t° 550 °C. Through the oxide film, it is in normal conditions, is sufficiently resistant to the action of hydrochloric acid and the wet condensation is poorly soluble caustic alkalis, but soluble in solution of hydrogen peroxide and Aqua Regia. The valence +2 or +4. Chemical compounds with a valence of +4 is more stable.
Germanium is produced from by-products of processing of ores of non-ferrous metals, coal slag, peat ash, etc. Determine the presence of Germany by using emission spectral analysis, where he found a bright yellow stripe. Metallurgical method smelted at t° up to 1800 °C. To obtain technically pure germanium it is cleaned in quartz columns with hydrochloric acid, diffusion, aimed at crystallization. Technical conditions and GOST 16153−80 normalized production of monocrystalline Germany for use in semiconductor devices.
In optics night vision devices, cameras, fire alarm system Germany uses transparency to infrared radiation. Germanium is a valuable semiconductor, which are used in the form of high-frequency single crystals for the production of resistors, diodes, and photodiodes. The most used dioxide GeO2. on the basis of the metal produced devices x-ray spectroscopy, a variety of sensors, resistance thermometers etc. Jewelers and dental prosthetists also use this item. A number of alloys of germanium are used as solders or for anti-corrosion plating.
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The price of semi-finished products of rare and non-ferrous metals depends on the parameters of products, the purity of the material and additional conditions of delivery. Semi-finished products on the basis of Germany from the «_" differs reasonable price and a wide variety that will allow any buyer to choose the product which most fully satisfies its needs. High quality workmanship and full compliance of products with the requirements of the state normative documents and technical conditions for the supply — main principle of our company in work with clients. And reasonable prices and convenient delivery method is the additional benefit of working with us.