Effect of Сationic Nonstoichiometry on the Structure and Properties of the Barium and Strontium Metaplumbates

Andrey I. Klyndyuk1, Yekaterina A. Chizhova2
Page no. 12-16

The oxide ceramics with different barium (strontium) and lead ratio (0,77 ≤ Ba (Sr) : Pb ≤ 1,3) had been prepared. Crystal structure, microstructure, thermal expansion, electrical conductivity and thermo-EMF of the materials prepared had been studied. It had been determined, that increasing of the lead oxide content in the samples led to the improving of their sinterability, decreasing of linear thermal expansion coefficient and increasing of the power factor of the sintered ceramics. The maximal value of the power factor have the SrPb_1,2O_3+d composition, that allow us to consider its as base for development of the new oxide thermoelectrics.                                                                                                                                                                                                                                      

Keywords : Barium (strontium) metaplumbate, cationic nonstoichiometry, electrical conductivity, thermo-EMF, power factor.