silica glass information
Answers
Silicon dioxide, also known as silica, silicic acid or silicic acid anydride is an oxide of silicon with the chemical formula SiO2, most commonly found in nature as quartz and in various living organisms.[5][6] In many parts of the world, silica is the major constituent of sand. Silica is one of the most complex and most abundant families of materials, existing as a compound of several minerals and as synthetic product. Notable examples include fused quartz, fumed silica, silica gel, and aerogels. It is used in structural materials, microelectronics (as an electrical insulator), and as components in the food .
Silica glass is a kind of glass as the name is implied, but silica glass is composed of by almost only SiO2, while, on the other hand, other glasses are composed of by various kinds of elements. The amount of metallic impurity contained in silica glass is extremely little, and even silica glass having large amount of metallic impurity has only several 10 ppm and silica glass having small amount of metallic impurity has less than 10 ppb. In this way, the fact that the purity is extremely high brings to silica glass the excellent characteristics of silica glass which cannot be seen in other glasses.