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Title: Electrocaloric behaviour of tape cast and grain oriented NBT-KBT ceramics
Authors: Ünal, Muhammet Ali
Karakaya, Merve
Irmak, Tuğçe
Yıldırım Özarslan, Gökçe
Avcı, A. Murat
Fulanovic, Lovro
Suvacı, Ender
Adem, Umut
Keywords: Electrocaloric effect
Grain orientation
Sodium bismuth titanate
Tape casting
Templated grain growth
Bismuth compounds
Ferroelectric ceramics
Publisher: Elsevier
Abstract: We have investigated the effects of grain orientation and tape casting process on the electrocaloric properties of 0.82Na0.5Bi0.5TiO3-0.18 K0.5Bi0.5TiO3 (0.82NBT-0.18KBT) ceramics at the Morphotropic Phase Boundary (MPB), using direct and indirect measurements. We observe a larger electrocaloric response for the template-free ceramics compared to 7 and 10 wt% template containing ones, suggesting that grain orientation along rhombohedral < 100 > does not improve the electrocaloric response. Indirect measurements yielded a large adiabatic temperature change of around 3 K under an electric field of 50 kV/cm, which is significantly higher than 0.9 K reached at a lower electric field of 40 kV/cm using the direct measurement. © 2023 Elsevier Ltd
ISSN: 0955-2219
Appears in Collections:Materials Science and Engineering / Malzeme Bilimi ve Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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