“…Doping of trivalent ions such as Gd 3+ [2],Y 3+ [3], Sm 3+ [4], Nd 3+ [5] , Pr 3+ [6] and Dy 3+ [7,8] increase the oxygen ion vacancies in the ceria host which further increase the ionic conductivity of doped ceria based electrolytes [9][10][11]. In this work, we use Dy 3+ as dopant of ceria due to its lower charge (+3) and ionic radius (1.027Å) -almost close to that of Ce (0.97Å).Various reports can be found on Dy-doped ceria and its ionic conductivity [1,7,8]. Those samples were prepared by various methods such as solid state reaction method [1], solution combustion method [7], carbonate co-precipitation method [8], sol gel method [12] and samples were sintered at high temperatures [1,7].…”