Observation of large electrocaloric properties in lead-free Ba0.98Ca0.02Ti0.98Sn0.02O3 ceramics
authors Ramovatar; Coondoo, I; Kumar, P; Khan, AA; Satapathy, S; Panwar, N
nationality International
journal AIP ADVANCES
keywords TRANSITIONS; BEHAVIOR
abstract Tetragonal lead-free Ba0.98Ca0.02Ti0.98Sn0.02O3 (BCST) compound sintered at 1400 degrees C was investigated for its electrocaloric properties. The large adiabatic temperature variation, Delta T similar to 0.476 K and isothermal entropy change, Delta S similar to 1.90 J/kg. K were obtained at similar to 373 K at an electric field of 20 kV/cm. Further, higher electrocaloric coefficients (Delta T/Delta E similar to 0.238 K.mm/kV and Delta S/Delta E similar to 0.952 J.mm/K.kg.kV) with better refrigeration capacity (RC similar to 152 J/kg) were achieved at the same temperature and electric field. The Delta S/Delta E and RC values for this compound are better than that observed in various other lead-free ferroelectric ceramics. (c) 2019 Author(s).
publisher AMER INST PHYSICS
issn 2158-3226
year published 2019
volume 9
issue 5
digital object identifier (doi) 10.1063/1.5091975
web of science category Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied
subject category Science & Technology - Other Topics; Materials Science; Physics
unique article identifier WOS:000477701000011
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journal analysis (jcr 2019):
journal impact factor 1.337
5 year journal impact factor 1.627
category normalized journal impact factor percentile 19.013
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