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fluorine |
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fluorinePale yellow, gaseous, non-metallic element, atomic number 9, relative atomic mass 19. It is the first member of the halogen group of elements, and is pungent, poisonous, and highly reactive, uniting directly with nearly all the elements. It occurs naturally as the minerals fluorite (CaF2) and cryolite (Na3AlF6). Hydrogen fluoride is used in etching glass, and the freons, which all contain fluorine, are widely used as refrigerants. Fluorine was discovered by the Swedish chemist Karl Scheele in 1771 and isolated by the French chemist Henri Moissan in 1886. Combined with uranium as UF6, it is used in the separation of uranium isotopes. The Infrared Space Observatory detected hydrogen fluoride molecules in an interstellar gas cloud in the constellation Sagittarius in 1997. It was the first time fluorine had been detected in space. |
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| The Company is positioning fluorine and specialty chemicals as a growth business of their Chemicals Division, under the medium-term management plan "JIKKO-2007", started last year, and focuses on products which allow the Company to take advantage of its strengths. Key statement: A power transmission belt having a body defined by rubber and having a fiber layer on at least a part of the exposed outer surface of the body, and a mixture including a resin adhesive ingredient, a rubber ingredient and a lubricant that is a fluorine resin powder that is applied to the fiber layer. Treating the surface of wood-plastic composite (WPC) boards with fluorine gas in the presence of oxygen oxidizes the surface so that ordinary paints and primers adhere as they do to natural wood. |
fluorine
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