A discernible dielectric aging effect in the undoped, N_2-H_2-annealed lead magnesium niobate-lead titanate ceramic

摘要

it is well known that the undoped Pb(Mg_1/3Nb_2/3)O_3- PbTiO_3 ceramics, prepared through conventional ceramic Processing, present no evident aging effect. In this paper, However, a discernible aging phenomenon was observed in An undoped, N_2-H_2-annealed ceramic. When this samle Was later annealed again in air, this effect became negli- Gible again just like that of a normally prepared PMN-PT Ceramic.