... :Te-05 Grade 99.999. The content of Tellurium is above 99.999%. The total content of Ag, Al, ... :Te-06 Grade 99.9999. The content of Tellurium is above 99.9999%. The total content of Ag, Al, ... :Te-07 Grade 99.99999. The content of Tellurium is above 99.99999%. The total content of Ag, Al, ... Usage:It is mainly used in the manufacture of II-VI compound semiconductor, thermoelectric converting element, ...