Structural quantification of polar/nonpolar phases of relaxor clusters in transparent ferroelectric ceramics

A dual-phase refinement protocol considering distinct amounts of polar/nonpolar phases reflecting the polar nano phases formation in two relaxor ferroelectric systems was performed. The samples of PLZT and PLMN-PT have shown a typical relaxor behavior with different freezing temperatures, and the amounts of the polar phase of the lack of ergodicity were obtained using structure parameters. •Were synthesized PLZT and PLMN-PT relaxor transparent ferroelectric ceramics.•Electrical characterizations demonstrate a very typical relaxor behavior.•Structural characterizations were performed as a function of temperature.•It was possible to observe traces of crystalline phases related to the non-centrosymmetric structures consistent with the formation of polar nano-regions in the non-polar matrices using XRD data.•According to the concentration of polar phase it was possible to identify the temperature of lack of ergodicity of each relaxor system.•The concentration of polar phase at which the percolation of polar regions begins is around 25% for PLZT and 15% for PLMN-PT.•The versatility and simplicity of such characterization will allow for future studies on other compositions with different symmetries that exhibit this typical behavior.