Линейный коэффициент теплового расширения и температура Дебая PbTe при высоких температурах

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: 20.1*10-6 +/- 0.9* 10-6 K-1 and for single crystal: 19.7*10-6 +/- 0.8*10-6 K-1. The Debye temperature measured in the temperature range 293-573 K equal to 105 +/- 3 K.