Title :
Direct measurements of the electrocaloric effect in lead-free K0.5Na0.5NbO3-SrTiO3 ceramics sintered in air
Author :
Rozic, Brigita ; Koruza, Jurij ; Kutnjak, Zdravko ; Malic, Barbara ; Kosec, Marija
Author_Institution :
Jozef Stefan Inst., Ljubljana, Slovenia
Abstract :
By utilizing direct measurements of the electrocaloric effect (ECE) temperature change via high-resolution calorimeter, the ECE has been studied in bulk lead-free relaxor K0.5Na0.5NbO3-SrTiO3 (KNN-STO) ceramics. Observed magnitude of the ECE confirms existence of the large EC effect in this system near the ferroelectric phase transition.
Keywords :
calorimetry; ferroelectric ceramics; ferroelectric transitions; potassium compounds; pyroelectricity; relaxor ferroelectrics; sintering; sodium compounds; strontium compounds; ECE temperature; K0.5Na0.5NbO3-SrTiO3; bulk lead-free relaxor ceramics; electrocaloric effect temperature; ferroelectric phase transition; high-resolution calorimeter; lead-free ceramic sintering; Ceramics; Electric fields; Entropy; Lead; Relaxor ferroelectrics; Temperature measurement; bulk ceramics; electrocaloric effect; ferroelectric; lead-free ceramics; relaxor;
Conference_Titel :
Applications of Ferroelectrics held jointly with 2012 European Conference on the Applications of Polar Dielectrics and 2012 International Symp Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials (ISAF/ECAPD/PFM), 2012 Intl Symp
Conference_Location :
Aveiro
Print_ISBN :
978-1-4673-2668-1
DOI :
10.1109/ISAF.2012.6297752
