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Tellurium is the most metallic of the abundant chalogens. In many of its chemical properties, it still resembles oxygen, sulfur, and selenium. More than 90% of tellurium is produced from anode slimes collected from electrolytic copper refining, and the remainder is derived from skimmings at lead refineries and from flue dust and gases generated during the smelting of bismuth, copper, and lead ores. Applications of tellurium are frequently limited by the small quantities available. Tellurium's major use is an alloying additive in steel to improve machining characteristics. It is used in the chemical industry, as a vulcanizing agent and accelerator in the processing of rubber, and as a component of catalysts in synthetic fiber production. Tellurium is increasingly used in the production of cadmium-tellurium based solar cells. It is also used in photoreceptor and thermoelectric devices. Tellurium and tellurium compounds generally have a low environmental impact. Keywords: tellurium; inorganic tellurium compounds; organic tellurium compounds; copper |
