Effect Of Dysprosium Doping On Structural, Dielectric And Ferroelectric Properties Of PLZT (65/35) Ceramics

摘要

Dy modified polycrystalline PLZT (65/35) i.e. Pb_(0.92-x)La_(0.08)Dy_x(Zr_(0.65)Ti_(0.35))_(1-x/4)O3 materials were synthesized by solid state reaction technique. X-ray pattern of compounds confirmed the formation of single rhombohedral phase. Detailed dielectric studies of the compounds as a function of temperature shows that broadening of permittivity peak and transition temperature depends on Dy~(3+) ions concentration. Analysis of Diffuseness () of the broadened dielectric peaks of materials gave its value between 1 & 2, indicating the different degree of substitutional disorder in the system. The transition temperature (T_c) was found to shift towards lower temperature by 40°C with Dy concentration. The P-E loop measurement at room temperature confirms the ferroelectric behavior.