Thermal variation of structural property, linear thermal expansion
coefficient, resistivity, thermopower and power factor of polycrystalline
Bi1-xSbx (x=0.10, 0.14) samples are reported. Temperature-dependent powder
diffraction experiments indicate that samples do not undergo any structural
phase transition. Rietveld refinement technique has been used to perform
detailed structural analysis. Temperature dependence of thermal expansion
coefficient is found to be stronger for Bi0.90Sb0.10. Also, power factor for
direct band gap Bi0.90Sb0.10 is higher as compared to that for indirect band
gap Bi0.86Sb0.14. Role of electron-electron and electron-phonon scattering on
resistivity, thermopower and power factor have been discussed
