Comment on “Giant pyroelectric energy harvesting and a negative electrocaloric effect in multilayered nanostructures” by G. Vats, A. Kumar, N. Ortega, C. R. Bowen and R. S. Katiyar, Energy Environ. Sci., 2016, 9, 1335

2021 ◽  
Author(s):  
Xin Chen ◽  
Vladimir Shvartsman ◽  
Doru C. Lupascu ◽  
Q. M. Zhang
Keyword(s):  
Energy Harvesting ◽  
Ferroelectric Phase ◽  
Hysteresis Loops ◽  
Electrocaloric Effect ◽  
Maxwell Relation ◽  
Multilayered Nanostructures ◽  
Energy Environ

In the ferroelectric phase, the change of polarization with temperature from partially switched polarization hysteresis loops has no relation with the electrocaloric effect (ECE) and hence cannot be used in Maxwell relation to deducing ECE.

Reply to the ‘Comment on “Giant pyroelectric energy harvesting and a negative electrocaloric effect in multilayered nanostructures”’ by X. Chen, V. Shvartsman, D. C. Lupascu and Q. M. Zhang, Energy Environ. Sci., 2021, DOI: 10.1039/D0EE02548H

2021 ◽  
Author(s):  
Gaurav Vats ◽  
Ashok Kumar ◽  
Chris R. Bowen ◽  
Nora Ortega ◽  
Ram S. Katiyar
Keyword(s):  
Thin Film ◽  
Energy Harvesting ◽  
Scientific Community ◽  
Electrocaloric Effect ◽  
Detailed Explanation ◽  
Multilayered Nanostructures ◽  
Energy Environ

A detailed explanation of the calculations for the electrocaloric effect (ECE) performance of thin-film heterostructures for motivating the scientific community to carry out experiments for validation.

scholarly journals Giant pyroelectric energy harvesting and a negative electrocaloric effect in multilayered nanostructures

2016 ◽  
Vol 9 (4) ◽  
pp. 1335-1345 ◽  
Author(s):  
Gaurav Vats ◽  
Ashok Kumar ◽  
Nora Ortega ◽  
Chris R. Bowen ◽  
Ram S. Katiyar
Keyword(s):  
Energy Harvesting ◽  
Electrocaloric Effect ◽  
Layered Nanostructures ◽  
Multilayered Nanostructures

This work examines the potential of PbZr0.53Ti0.47O3/CoFe2O4 (PZT/CFO) multi-layered nanostructures (MLNs) to achieve a giant electrocaloric effect (ECE) and enhanced pyroelectric energy harvesting.

The Electrocaloric Effect of BaTiO3 Ceramics Using Hydrothermal Synthesized Nano-Sized Starting Powders

2012 ◽  
Vol 624 ◽  
pp. 138-141
Author(s):  
Xi Han ◽  
Yang Bai ◽  
Li Jie Qiao
Keyword(s):  
Phase Transition ◽  
Curie Point ◽  
Applied Field ◽  
Hysteresis Loops ◽  
Electrocaloric Effect ◽  
Maxwell Relation ◽  
Adiabatic Temperature Change ◽  
Good Consistency ◽  
Titanate Ceramics ◽  
Dsc Curves

The electrocaloric effect (ECE) of barium titanate ceramics with hydrothermal synthesized nano-sized starting powders was investigated. The Curie point and latent heat of the phase transition were characterized by a differential scanning calorimeter (DSC). The P-E hysteresis loops were measured in the temperature range from 30-160oC and ECE adiabatic temperature change was obtained according to the Maxwell relation. A double hysteresis loop is observed at the temperature slightly above the Curie point, which indicates a good consistency of phase transition similar to single crystal. It is also proved by the sharp endothermic peak of phase transition in DSC curves. It exhibits a high ECE of ΔTmax=1.3K under a low applied field of 10kV/cm, which is much higher than that of the sample using micron-sized starting powders.

scholarly journals Giant electrocaloric effect at the antiferroelectric-to-ferroelectric phase boundary in Pb(ZrxTi1–x)O3

2019 ◽  
Vol 115 (2) ◽  
pp. 023902 ◽  
Author(s):  
A. V. Kimmel ◽  
O. T. Gindele ◽  
D. M. Duffy ◽  
R. E. Cohen
Keyword(s):  
Phase Boundary ◽  
Ferroelectric Phase ◽  
Electrocaloric Effect

Effect of donor doping in B sites on the electrocaloric effect of BaTi1−xNbxO3 ceramics

RSC Advances ◽  
2015 ◽  
Vol 5 (88) ◽  
pp. 71873-71877 ◽  
Author(s):  
Yang Bai ◽  
Xi Han ◽  
Li-Jie Qiao
Keyword(s):  
Phase Transition ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Electrocaloric Effect ◽  
Donor Doping ◽  
Temperature Window ◽  
Lower Temperature

The donor doping of Nb5+ for Ti4+ in the B sites of BaTiO3 rapidly shifts the ferroelectric phase transition to a lower temperature and diffuses it, so that the electrocaloric ΔTmax gradually reduces and the temperature window becomes much wider.

scholarly journals Ferroelectricity and Phase Transitions in Pyridinium Periodate Single Crystal

2000 ◽  
Vol 55 (11-12) ◽  
pp. 891-894 ◽  
Author(s):  
Z. Czapla ◽  
S. Dacko ◽  
B. Kosturek
Keyword(s):  
Phase Transitions ◽  
Physical Properties ◽  
Single Crystal ◽  
Single Crystals ◽  
Phase Ii ◽  
Ferroelectric Phase ◽  
Hysteresis Loops ◽  
Electric Permittivity ◽  
Phase Ii And Iii ◽  
Three Phases

Abstract Single crystals of pyridinium periodate were grown, and their physical properties were studied. Anomalies of the electric permittivity and birefringence were observed at TC1 = 321 K and TC2 = 211 K. These observations gave evidences for the existence of three phases denoted as I, II, and III. Hysteresis loops were observed both in phase II and III. Pyroelectric measurements showed two anomalies at TC1 and TC2 . The anomaly at TC1 is related to the transition between a para-and ferroelectric phase, and the anomaly at T cl to the transition between two ferroelectric phases.

Sign in / Sign up

Export Citation Format

Share Document