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Zinc oxide is an inorganic compound with the formula Zn O.It is a white powder which is insoluble in water. ZnO is used as an additive in numerous materials and products including cosmetics, food supplements, rubbers, plastics, ceramics, glass, cement, lubricants, [12] paints, sunscreens, ointments, adhesives, sealants, pigments, foods, batteries, ferrites, fire retardants, semi conductors ...
All three found an unknown metal in a sample of zinc oxide from Silesia, but the name that Stromeyer gave became the accepted one. [119] 34 Selenium: 1817 J. Berzelius and G. Gahn: 1817: J. Berzelius and G. Gahn: While working with lead they discovered a substance that they thought was tellurium, but realized after more investigation that it ...
P. M. de Respour, a Flemish metallurgist and alchemist, was the first person to extract metallic zinc from zinc oxide, which he did in 1668. [1] Original works
Zinc oxide is used to protect rubber polymers and plastics from ultraviolet radiation (UV). [125] The semiconductor properties of zinc oxide make it useful in varistors and photocopying products. [144] The zinc zinc-oxide cycle is a two step thermochemical process based on zinc and zinc oxide for hydrogen production. [145]
The element was first found in the condensation of vapors (mixed with soot and zinc oxide) that rose out of a furnace in which zinc oxide was being roasted. Cadmium’s discovery is also loosely attributed to K.S.L. Hermann and J.C.H. Roloff who may have found cadmium in zinc oxide during the same year. [1]
Marggraf had isolated zinc in 1746 by heating a mixture of calamine and carbon in a closed vessel without copper. He was unaware that the same process had been developed (and patented) by William Champion in England around 1738–1740 and by Anton von Swab in Sweden around 1742. However, Marggraf described the process in great detail and ...
In the 18th and 19th centuries large ore mines could be found near the German village of Breinigerberg. During the early 19th century it was discovered that what had been thought to be one ore was actually two distinct minerals: Zinc carbonate ZnC O 3 or smithsonite and; Zinc silicate Zn 4 Si 2 O 7 (OH) 2 ·H 2 O or hemimorphite.
In 1757, Louis Claude Cadet de Gassicourt, while investigating arsenic compounds, creates Cadet's fuming liquid, later discovered to be cacodyl oxide, considered to be the first synthetic organometallic compound. [52] In 1758, Joseph Black formulated the concept of latent heat to explain the thermochemistry of phase changes. [53]