Study of Electro-Caloric Effect in Ca and Sn co-Doped BaTiO3 Ceramics

TL;DR

This study investigates the structural, ferroelectric, dielectric, and electro-caloric properties of Ca and Sn co-doped BaTiO3 ceramics, revealing enhanced properties and significant electro-caloric effects in lead-free ferroelectric materials.

Contribution

It provides new insights into the electro-caloric effect in co-doped BaTiO3 ceramics and demonstrates enhanced ferroelectric properties through Ca and Sn co-doping.

Findings

Enhanced ferroelectric and dielectric properties observed.

Maximum electro-caloric coefficient found in Ba0.95Ca0.05Ti0.95Sn0.05O3.

Homogenous phase confirmed by X-ray and Mössbauer analysis.

Abstract

The present work deals with the study of structural, ferroelectric, dielectric and electro-caloric effects in lead free ferroelectric polycrystalline Ba1-xCaxTi0.95Sn0.05O3 (x= 2, 5 and 10 %) i.e., Ca, Sn co-doped BaTiO3 (BTO). Phase purity of the samples is confirmed from X-ray data by using Rietveld refinement. 119Sn M\"ossbauer reveals homogenous phase as well as iso-valent substitution of Sn at Ti site. Enhancements in ferroelectric and dielectric properties have been observed. Indirect method which is based on Maxwell equation has been used to determine the electro-caloric (EC) effect in the studied ferroelectric ceramics and maximum EC coefficient is observed for Ba0.95Ca0.05Ti0.95Sn0.05O3.