Skade af stannisk oxid

Toxicity and protection: people exposed to tin dioxide for 15 to 20 years develop pneumoconiosis, or pneumoconiosis.The maximum permissible air concentration is 10mg/m3(converted to metallic tin meter).Protective measures: use respirator when dust is abundant, and pay attention to protect the skin.SnO2 is also an excellent transparent conductive material.It was the first commercially available transparent conductive material, in order to improve the conductivity and stability, and often mixed use, such as SnO ₂ : Sb, SnO ₂ : F, etc.SnO2 and its doping have tetragonal rutile, as shown in the figure.Red is O, black is Sn, and SnO2 is composed of two Sn and four O atoms with lattice constants a=b=0.4737nm, c=0.3186nm, and c/a=0.637.O ^ 2 = 0.140 nm, Sn ^ 4 + = 0.071 nm.SnO2 is n-type wide energy gap semiconductor, band gap width is 3.5-4.0eV, visible and infrared transmission is 80%, plasma edge is located at 3.2 micron, refractive index >2, udryddelseskoefficient har en tendens til 0. Som en ledende film kommer bæreren af ​​SNO2 hovedsageligt fra krystaldefekter, nemlig o ledige og elektroner leveret af dopede urenheder.