Tellurium is a quasi-metal with the element symbol Te. Its name comes from tellus, meaning "land," and was discovered in 1782 by F.J.Uller von Reichenstein. Tellurium is a silver crystal of rhombic system, soluble in sulfuric acid, nitric acid, aqua regia, potassium cyanide, and potassium hydroxide; Insoluble in cold and hot water, carbon disulfide. High-purity tellurium is made of tellurium powder and extracted with sodium polysulfide. The purity is 99.999%. For semiconductor devices, alloys, chemical raw materials, cast iron, rubber, glass, and other industries as additives. China has the third largest known reserves of associated tellurium in the world. Associated tellurite resources are relatively wealthy. About 30 associated tellurite-producing areas have been found in China, with accounts of nearly 14000t. Tellurite mining areas are scattered in 16 provinces (regions) in China, but the resources are mainly concentrated in Guangdong, Jiangxi, Gansu, and other provinces. Tellurite in China is also primarily associated with copper, lead, zinc, and other metal ores. According to the calculation of central mineral reserves, about 10,000 tons of tellurite resources in China have yet to be included in the accounts. This will change the distribution pattern of tellurium resources and may make China a significant tellurium resource country. Tellurium comes in two allotropes, the black-powdered, amorphous tellurium and the silver-white, metallic, hexagonal crystalline tellurium. Semiconductor, forbidden bandwidth 0.34 electron volts. Of the two allotropes of tellurium, one is crystalline tellurium, metallic, silvery, brittle, and similar to antimony; The other is amorphous powder, dark gray. Medium density, low melting, and boiling point. It is a non-metallic element with excellent heat and electrical conductivity. Of all its non-metallic companions, it has the most substantial gold properties. If you are looking for high quality, high purity and cost-effective bismuth telluride, or if you require the latest price of bismuth telluride, please feel free to email contact mis-asia.