Abstract
Oxidation behavior of lead telluride (PbTe) and glass-coated PbTe was studied at oxygen partial pressures of 10Pa to 0.1MPa in the temperature range between 700 to 900K. Mass loss was observed at moderately low oxygen partial pressures and at high temperatures, while mass gain was observed at high oxygen partial pressures and at low temperatures. For the samples which showed mass loss, Pb3TeO5 or Pb5TeO7 formed on the PbTe surface. The formation of PbTeO3 layer or Pb2TeO4/PbTeO3 multi-layer caused the mass gain. Oxidation resistance of PbTe was improved by the glass-coating. No mass change was observed up to 20ks.
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