Observation of large electrocaloric properties in lead-free Ba0.98Ca0.02Ti0.98Sn0.02O3 ceramics
Source abstract
Abstract
Tetragonal lead-free Ba0.98Ca0.02Ti0.98Sn0.02O3 (BCST) compound sintered at 1400 °C was investigated for its electrocaloric properties. The large adiabatic temperature variation, ΔT ∼ 0.476 K and isothermal entropy change, ΔS ∼ 1.90 J/kg.K were obtained at ∼ 373 K at an electric field of 20 kV/cm. Further, higher electrocaloric coefficients (ΔT/ΔE ∼ 0.238 K.mm/kV and ΔS/ΔE ∼ 0.952 J.mm/K.kg.kV) with better refrigeration capacity (RC ∼ 152 J/kg) were achieved at the same temperature and electric field. The ΔS/ΔE and RC values for this compound are better than that observed in various other lead-free ferroelectric ceramics.
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Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Microwave Dielectric Ceramics Synthesis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Physics, Central University of Rajasthan Bandarsindri 1 , Ajmer 305817, Rajasthan, India
Department of Physics & CICECO - Aveiro Institute of Materials, University of Aveiro 2 , 3810-193 Aveiro, Portugal
Laser & Functional Materials Division, Raja Ramanna Centre for Advanced Technology 3 , Indore 452013, India
Homi Bhabha National Institute, BARC 4 , Mumbai 400094, India
Funding
University Grants Commission
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