Oxidation of lead telluride (PbTe) is a serious issue for the thermoelectric application. In the present study, the oxidation behavior of PbTe was studied at oxygen partial pressures of 10 Pa to 0.1 MPa in the temperature range between 700 and 900 K. At moderately low oxygen partial pressures and high temperatures, mass loss was observed and the oxide layers (Pb3TeO5 or Pb5TeO7) formed on the PbTe surface. At high oxygen partial pressures and low temperatures, mass gain was observed and PbTeO3 or Pb2TeO4/PbTeO3 oxide layers formed on the PbTe surface. When the temperature was higher than 819 K, PbTeO3 melted and dropped down from the specimen. Oxidation-resistive glasses were coated on the PbTe surface. The glass-coated PbTe showed excellent oxidation resistance showing no mass change at 773 K.
|Publication status||Published - 1997 Dec 1|
|Event||Proceedings of the 1997 16th International Conference on Thermoelectrics, ICT'97 - Dresden, Ger|
Duration: 1997 Aug 26 → 1997 Aug 29
|Other||Proceedings of the 1997 16th International Conference on Thermoelectrics, ICT'97|
|Period||97/8/26 → 97/8/29|
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