论文部分内容阅读
Sr_(0.9)Ba_(0.1-x)Ti_(0.8)Nb_(0.2)O_3 ceramics(x=0,0.01,0.02 and 0.05) are prepared by solid state reaction,whose thermoelectric properties are investigated from 323 K to 1073 K.By introducing A-site nonstoichiometry,the absolute Seebeck coefficient is enhanced,while the electrical resistivity is surprisingly reduced due to the significantly enhanced carrier mobility.These results are dramatic in thermoelectric materials,effectively enhancing the power factor.Moreover,the thermal conductivity is reduced,thus the thermoelectric performance of Sr_(0.9)Ba_(0.1)Ti_(0.8)Nb_(0.2)O_3 ceramic is significantly enhanced by A-site nonstoichiometry.
Sr_ (0.9) Ba_ (0.1-x) Ti_ (0.8) Nb_ (0.2) O_3 ceramics (x = 0,0.01,0.02 and 0.05) were prepared by solid state reaction, whose thermoelectric properties were investigated from 323 K to 1073 K. By introducing A-site nonstoichiometry, the absolute Seebeck coefficient is enhanced, while the absolute Seebeck coefficient is enhanced, while the electrical Seebeck coefficient is enhanced, while the electrical conductivity is surprisingly reduced due to the significantly enhanced thermodynamic materials. , thus the thermoelectric performance of Sr_ (0.9) Ba_ (0.1) Ti_ (0.8) Nb_ (0.2) O_3 ceramic was significantly enhanced by A-site nonstoichiometry.