Effect of MoO3 concentration on sintering and electrical properties of SiO2-containing neodymium-doped ceria electrolytes

► MoO3 could be used as an effective sintering aid for NDCSi ceramics. ► MoO3 could be used as a grain boundary scavenger for NDCSi system. ► MoO3 doping leads to the occurrence of viscous flow sintering.