Tellurium Dioxide

Tellurium dioxide is used to fabricate fiber optics and pigments and to color ceramics and glass.

Aurubis is one of the world’s largest producers of high-quality tellurium. It is recovered from a variety of primary and secondary raw materials. Through the production processes in our copper smelters, we ensure a continuous supply of tellurium metal and tellurium dioxide.

Furthermore, both tellurium metal and tellurium dioxide from Aurubis fulfill the REACH requirements.

Main applications of tellurium dioxide

  • Rubber: as a vulcanizing agent and activator
  • Glass/ceramics:
    • to increase the refraction index 
    • to produce blue and brown paint pigments
  • Fiber optics: to increase the transmission rate of fiber-optic cables


Specifications of tellurium dioxide

Tellur (Te) > 79.55 %
Tellurium dioxide (TeO2) > 99.5 %
Cadmium (Cd) < 10 ppm
Lead (Pb) < 20 ppm
Copper (Cu) < 5 ppm
Iron (Fe) < 20 ppm
Selenium (Se) < 10 ppm
Tin (Sn) < 200 ppm
Antimony (Sb) < 200 ppm
Arsenic (As) < 10 ppm
Bismuth (Bi) < 10 ppm
Chromium (Cr) < 10 ppm
Nickel (Ni) < 10 ppm
Zinc (Zn) < 10 ppm
Cobalt (Co) < 10 ppm
Insoluble alkali residues < 0.05 %
Appearance Powder (color: white to cream/yellowish)
Weight (per packaging unit) 25 kg
Packaging three-color steel pail

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