Silicon dioxide, also known as silica (from the Latin silex), is a chemical compound that is an oxide of silicon with the chemical formula SiO2. It has been known since ancient times. Silica is most commonly found in nature as quartz, as well as in various living organisms.In many parts of the world, silica is the major constituent of sand
S 4608 (OTTO) Silicon dioxide sputtering target, diam. x thickness 304.8 mm x 10 mm, 99.99% elastomer bonding to Copper backing plate 304.8mm dia x 16 mm thick - used in research.