Electrotechnical Model of Conductivity of Lead Telluride, Obtained by Method of Powder Pressing

Abstract

The results of study of thermoelectric properties of lead telluride obtained by method of powder pressing arepresented. A modified electrical model for interpreting the empirical dependences σ (T) is proposed, according towhich the compressed sample is represented by a system of crystallites with intergranular boundaries whoseproperties differ along and across the compression axis.

Thermodynamic Analysis of the Defective Subsystem of Lead Telluride Crystals with Impurity of Oxygen

“…Studies [7][8] show that the diffusion of oxygen in PbTe can lead to the appearance of near-surface regions of p-type conductivity with a carrier concentration of ≈ 10 18 cm -3 . The thickness of this layer will depend on the time of exposure, the temperature and may be tens of micrometers, which is proportional to the size of the PbTe grains used to press the thermoelements.…”