Structural and dielectric properties of Pb(1-x)(Na0.5Sm0.5)xTiO3 ceramics

TL;DR

This study investigates how substituting Na0.5Sm0.5 for Pb in PbTiO3 affects its structure and phase transition behavior, revealing reduced tetragonality and a more diffused phase transition with increased substitution.

Contribution

It provides new insights into the relationship between composition, structure, and phase transition characteristics in PNST ceramics.

Findings

Substitution reduces tetragonality.

Phase transition shifts to lower temperatures.

Transition becomes more diffused with increased substitution.

Abstract

A correlation between structure and vibrational properties related to a ferroelectric to paraelectric phase transition in perovskite Pb(1-x)(Na0.5Sm0.5)xTiO3 (PNST - x) polycrystalline powders is discussed. Substitution leads to reduction of tetragonality which is associated with a shift of the phase transition to lower temperatures. The nature of the phase transition gets diffused with increasing substitution.