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 |
