Measuring lead scandium tantalate phase transition entropy by infrared camera

Autor:	Emmanuel Defay, Veronica Kovacova, Pierre Lheritier, Wook Jo, Youri Nouchokgwe, Alvar Torello, Chang-Hyo Hong
Rok vydání:	2021
Předmět:	Phase transition Materials science Infrared Ferroelectricity Heat capacity chemistry.chemical_compound Differential scanning calorimetry chemistry Latent heat Materials Chemistry Ceramics and Composites Lead scandium tantalate Atomic physics Adiabatic process
Zdroj:	Journal of the European Ceramic Society. 41:7000-7004
ISSN:	0955-2219
Popis:	Using an infrared camera, we measured the latent heat of the first order phase transition in lead scandium tantalate at different applied electric fields. The entropy change value of 3.4 J kg−1 K−1 is consistent with differential scanning calorimetry measurements. The advantage of such an approach stems from the possibility to obtain both adiabatic temperature change and latent heat of the phase transition material only with an infrared camera or a thermocouple. This may prove useful for a systemic characterization of first order electrocaloric materials.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2b066377874886df7676faca526f52e1 https://doi.org/10.1016/j.jeurceramsoc.2021.07.002 Zobrazit plný text záznamu Full Text from ScienceDirect