Tellurium Dioxide Powder

TeO₂, 99% – 99.999% pure

CAS# 7446-07-3

Tellurium dioxide, also known as tellurium oxide (TeO₂), is a white powder. It has a high refractive index and high optical nonlinearity. It is an amphoteric substance and therefore can act both as an acid or as a base depending on the solution it is in. It reacts with acids to make tellurium salts and bases to make tellurites.

Tellurium dioxide is used as a catalyst for rubber and for metal surface treatment, and corrosion resistance. Tellurium dioxide powders are used for growing TeO₂ single crystal infrared devices and infrared window materials and to manufacture acousto-optic materials. This chemical is also used for fuel cell and solar applications.

It is a conditional glass former, which means it will form a glass with small molar% additions of a second compound such as an oxide or halide.

Specifications:

  Formula                         TeO₂

  Form                               White to yellowish powder

  Molecular Weight        159.6

  Density                           5.67 gm/cm³

  Melting point                 733^oC

  Boiling point                  1245^oC

Typical Analysis (99.9% pure):

  Aluminum                       ≤ 5 ppm

  Antimony                        ≤ 5

  Arsenic                            ≤ 10

  Bismuth                           ≤ 10

  Calcium                           ≤ 10

  Copper                            ≤ 2

  Iron                                   ≤ 5

  Lead                                 ≤ 10

  Magnesium                     ≤ 5

  Nickel                               ≤ 10

  Selenium                         ≤ 10

  Silver                                ≤ 2

  Tin                                     ≤ 2

  Zinc                                  ≤ 10