The dependence of the synthesis condition on the dielectric behaviors of the 0.75Pb(Fe2/3W1/3)O3–0.25PbTiO3 based ceramics

Relaxor Behavior of Lead-Free Nonstoichiometric (Na0.48-xK0.48-xLi0.04)Nb0.89-xTa0.05Sb0.06O3-xSrTiO3Ceramics

“…[1][2][3] It is well known that the macroscopic dielectric responses of relaxor ceramics, such as Pb(Fe 1/2 Nb 1/2 )O 3 (PFN), Pb(Fe 2/3 W 1/3 )O 3 (PFW), and Pb(Mg 1/3 Nb 2/3 )O 3 (PMN), are different from normal ferroelectric behaviors due to the composition fluctuation of the perovskite structure. [4][5][6][7][8][9] In recent years, several models and approaches have been proposed to explain the physical properties and different mechanisms of relaxor ferroelectrics, including the spin glass model, Landau theory, and polar nanoregions (PNRs) approach. [10][11][12][13][14][15][16] In addition, the diffused phase transition (DPT) and the dielectric properties have a strong frequency dispersion, which is a typical dielectric behavior of relaxor ferroelectrics.…”