Thermophysical properties of Ba1−Sr MoO3(s)

Abstract Ba 1− x Sr x MoO 3 (s) ( x = 0, 0.2, 0.4, 0.5, 0.8, 1) solid-solutions were synthesized by reduction of corresponding Ba 1− x Sr x MoO 4 (s) and were characterized using X-ray diffraction (XRD). Thermal expansion behavior of Ba 1− x Sr x MoO 3 (s) ( x = 0, 0.4, 0.8 and 1) were investigated in the temperature range 298–873 K by high temperature X-ray diffraction (HTXRD). The average volume thermal expansion coefficient of Ba 1− x Sr x MoO 3 (s) ( x = 0, 0.4, 0.8 and 1) was found to be 2.83 × 10 −5 , 2.20 × 10 −5 , 2.02 × 10 −5 and 2.27 × 10 −5 K −1 , respectively. Heat capacity of Ba 1− x Sr x MoO 3 (s) ( x = 0, 0.4, 0.8, 1) was measured with a heat flux-type differential scanning calorimeter (DSC) in the temperature range 290–870 K. The specific heat of Ba 1− x Sr x MoO 3 (s) was found to increase with increase in concentration of strontium. The thermodynamic functions such as enthalpy increment, entropy and Gibbs energy functions of Ba 1− x Sr x MoO 3 (s) were also calculated.