The Influence of Measurement Conditions on the Electrocaloric Effect in Ferroelectric Ceramics of Modified Barium Titanate

Autor:	Magdalena Krupska-Klimczak, Krzysztof Ziewiec, Irena Jankowska-Sumara
Jazyk:	angličtina
Rok vydání:	2024
Předmět:	electrocaloric effect electrocaloric strength barium titanate Technology Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Zdroj:	Materials, Vol 17, Iss 13, p 3329 (2024)
Druh dokumentu:	article
ISSN:	1996-1944
DOI:	10.3390/ma17133329
Popis:	In this work, the electrocaloric effect (ECE) and electrocaloric strength (ΔT/E) were measured and thermal and dielectric studies were performed on Pb-modified BaTiO3 (BPT). The saturated hysteresis loops and normal ferroelectric behavior of the ferroelectric ceramics allow the utilization of the indirect method to estimate the electrocaloric properties. The electrocaloric measurements were performed under high (18 kV/cm) versus low (8 kV/cm) electric field conditions. These conditions were chosen to notice and then eliminate an artificial negative electrocaloric effect in the tested ceramics. At the same time, relatively high values of positive electrocaloric temperature change ΔT (~ 2.19 K) and electrocaloric strength ΔT/E (~0.27–0.11 K·cm/kV) were obtained.
Databáze:	Directory of Open Access Journals
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