î´î´ In 1788, a Swedish amateur, Karl Arrhenius, who studied chemistry and mineralogy and collected ore, discovered the appearance in Ytterby, outside the Bay of Stockholm. The black mineral of bitumen and coal is named Ytterbite according to the local place name. In 1794, the Finnish chemist John Gadolin analyzed this sample of the Itite mine. Found that addition of beryllium, silicon, iron oxide, further comprising an oxide date "new earth" 38% of unknown elements. In 1797, Swedish chemist Exeter Berg (Anders Gustaf Ekeberg) confirmed this "new earth", named yttrium earth (Yttria, yttrium oxides intended). î´î´
Yttrium is a versatile metal, the main purposes are:
(1) Additives for steel and non-ferrous alloys. FeCr alloy usually contains 0.5-4% bismuth. é’‡ can enhance the oxidation resistance and ductility of these stainless steels. After adding proper amount of lanthanum-rich rare earth in MB26 alloy, the comprehensive properties of the alloy are obviously improved, which can replace some medium-strength aluminum. The alloy is used on the force-bearing members of the aircraft; adding a small amount of rare earth-rich rare earth to the Al-Zr alloy can improve the electrical conductivity of the alloy; the alloy has been used in most domestic wire factories; adding bismuth to the copper alloy improves conductivity And mechanical strength. (2) Silicon nitride ceramic materials containing é’‡6% and 2% aluminum can be used to develop engine parts. (3) by drilling, cutting and welding by means of large machining power neodymium YAG laser beam of 400 watts. (4) An electron microscope fluorescent screen composed of a Y-Al garnet single wafer has high fluorescence intensity, low absorption of scattered light, and high temperature resistance and mechanical abrasion resistance. (5) Strontium alloys containing up to 90% of strontium can be used in aerospace and other applications where low density and high melting point are required. (6) At present, the high-temperature proton conductive material of erbium-doped SrZrO3 is of great significance for the production of fuel cells, electrolytic cells and gas sensors requiring high hydrogen solubility. In addition, niobium is also used in high temperature spray materials, thinners for nuclear reactor fuels, permanent magnet material additives, and getter in the electronics industry.
Yttrium is a versatile metal, the main purposes are:
(1) Additives for steel and non-ferrous alloys. FeCr alloy usually contains 0.5-4% bismuth. é’‡ can enhance the oxidation resistance and ductility of these stainless steels. After adding proper amount of lanthanum-rich rare earth in MB26 alloy, the comprehensive properties of the alloy are obviously improved, which can replace some medium-strength aluminum. The alloy is used on the force-bearing members of the aircraft; adding a small amount of rare earth-rich rare earth to the Al-Zr alloy can improve the electrical conductivity of the alloy; the alloy has been used in most domestic wire factories; adding bismuth to the copper alloy improves conductivity And mechanical strength. (2) Silicon nitride ceramic materials containing é’‡6% and 2% aluminum can be used to develop engine parts. (3) by drilling, cutting and welding by means of large machining power neodymium YAG laser beam of 400 watts. (4) An electron microscope fluorescent screen composed of a Y-Al garnet single wafer has high fluorescence intensity, low absorption of scattered light, and high temperature resistance and mechanical abrasion resistance. (5) Strontium alloys containing up to 90% of strontium can be used in aerospace and other applications where low density and high melting point are required. (6) At present, the high-temperature proton conductive material of erbium-doped SrZrO3 is of great significance for the production of fuel cells, electrolytic cells and gas sensors requiring high hydrogen solubility. In addition, niobium is also used in high temperature spray materials, thinners for nuclear reactor fuels, permanent magnet material additives, and getter in the electronics industry.
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