Abstract
ABSTRACTThis article presents electrocaloric effect in (SrxBa1-x)Nb2O6 ceramics (where x = 0.25, 0.50 and 0.75) using an indirect approach based on Maxwell's relations. Here, we have calculated various parameters of electrocaloric effect like temperature change (ΔT), entropy change (ΔS) and heat carrying capacity (ΔQ) of material due to the change in polarization under two different electric fields of 30 kV/cm and 20 kV/cm. (SrxBa1-x)Nb2O6 ceramics is well known pyroelectric material, where by increasing Sr/Ba ratio the ferroelectric behavior turns towards relaxor behavior. While in terms of electrocaloric effect performance (temperature change ΔT) is increase as the Sr/Ba ratio increases. Additionally, maximum ΔT (0.30 K) was found for (SrxBa1-x)Nb2O6 ceramic having x=0.75 molar concentration under the electric fields of 30 kV/cm.
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