Effects of physical properties of (Ba,Pb)TiO_3 particles on the ionic conductivity enhancement in NASICON based composite solid electrolytes

摘要

We have investigated the physical properties of (Ba_(1-x)Pb_x)TiO_3 particles affecting the conductivity of the composite solid electrolyte Na_4Zr_2Si_3O_(12)/(Ba,Pb)TiO_3. With increasing the lead content x the dielectric constant decreases, simultaneously the magnitude of the conductivity enhancement in the composite electrolyte increases. We find experimentally that the lead content in (Ba,Pb)TiO_3 has an effect on the conductivity enhancement, whereas it has no direct effect on the dielectric constant.