BaTiO3 ceramics were prepared using solid state reaction with addition of ZnNb2O6, to investigate the effects of ZnNb2O6 addition on structure and properties. The results show that the ZnNb2O6 addition lowers sintering temperature, decreases grain size, while introduces second phase (Ba2Ti5O12) for x >= 7.26 wt%. The dielectric breakdown strength is enhanced with the increasing doping level of ZnNb2O6 and reaches a maximum value at x = 7.26 wt%, exhibiting a maximum energy storage capability. (c) 2013 Elsevier B.V. All rights reserved.