Abstract:
The linear coefficient of thermal expansion and the Debye temperature of PbTe in the high-temperature range have been investigated using X-ray diffractometry. The studies were carried out on samples of two types: single crystal and PbTe powder, synthesized separately. Both types of samples showed fairly similar results in all measurements. It has been established that in the temperature range 293-773 K the linear thermal expansion coefficient is constant and for powder: $\alpha$ = 20.1 $\cdot$ 10$^{-6}$$\pm$ 0.9 $\cdot$ 10$^{-6}$ K$^{-1}$ and for single crystal: $\alpha$ = 19.7 $\cdot$ 10$^{-6}$$\pm$ 0.8 $\cdot$ 10$^{-6}$ K$^{-1}$. The Debye temperature measured in the temperature range 293–573 K equal to 105 $\pm$ 3 K.
Keywords:lead telluride, linear thermal expansion coefficient, Debye temperature.
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