Room temperature electro-caloric effect in lead-free Ba(Zr0.1Ti0.9)1−Sn O3 (x=0, x=0.075) ceramics

Lead-free Ba0.8Ca0.2(ZrxTi1−x)O3 ceramics with large electrocaloric effect

“…15 As an example, a significant temperature change of 0.6 K at 358 K with an applied electric field of 40 kV/cm was given by Wang et al in Ba 0.98 Ca 0.02 (Zr 0.085 Ti 0.915 )O 3. 16 Recently, Kaddoussi et al 17 reported that the addition of Sn element to Ba(Zr 0.1 Ti 0.9 )O 3 decreases the phase transition temperature (T C ) toward room temperature with reasonably high ECE coefficient of 0.253 K mm/kV at 303 K. Various dopants and substitutions were tried with mixed results regarding the influence on the ECE.…”

Large Room Temperature Electrocaloric Effect in KTa1−xNbxO3 Single Crystal

“…In addition, the ECEs are irreversible below T h2 (the finish‐temperature of the permitted accurate determination of the transition by heating) in FPT materials with the hysteretic regime . The latter can expand ECE working temperature, but the EC strength decreases significantly compared with the FPT . In addition, polar nano‐regions (PNRs) can improve EC performance because they can be aligned in line to achieve a large entropy change under applied fields .…”

“…The main EC performance parameters are isothermal entropy change (Δ S ) and adiabatic temperature change (Δ T ). Considerable attention has been paid to bulk, thin films, and polymers materials, and a lot of excellent results are obtained, such as PbZr 0.95 Ti 0.05 O 3 film with a Δ T = 12 K under Δ E = 480 kV cm −1 at 226 °C, BaTiO 3 single crystal with Δ T = 0.90 K under Δ E = 12 kV cm −1 at 129 °C, etc. Experiments have confirmed that outstanding ECEs are accompanied by the first‐order phase transition (FPT) and the diffuse phase transition (DPT) .…”

Structural, dielectric, electrocaloric and energy storage properties of lead free Ba0.975La0.017(ZrxTi0.95-x)Sn0.05O3 (x = 0.05; 0.20) ceramics

“…In the last decade, new emerging applications in BZT-based compounds such as electrocaloric cooling systems or energy storage capacitors have seen a number of publication soaring [18][19][20][21][22][23][24][25][26]. Asbani et al [18] reported a large electrocaloric responsivity coefficient (ΔT/ΔE) of 0.34 K mm/kV in Ba0.8Ca0.2Zr0.04Ti0.96O3 peaked at 386K.…”