An X-ray determination of the thermal expansion of α-phase Ag–Ga alloys at high temperatures

Abstract

The lattice parameters of four Ag-Ga alloys in the solid-solution range have been determined by X-ray methods in the temperature interval of 26-522°C using a Unicam 19 cm high-temperature powder camera. In all the cases the lattice parameters have been found to increase in a non-linear manner in the measured range of temperature and the relationship has been expressed in analytical form from the least-squares fitting of data. The linear thermal expansion coefficients have, however, been found to decrease with increasing temperature.