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https://hdl.handle.net/11147/7806| Title: | Electrocaloric Effect of Alkali Co-Substituted Sr0.6ba0.4nb2o6 Ceramics | Authors: | Kurnia, Arif Emriadi Mufti, Nandang Zulhadjri Adem, Umut |
Keywords: | Cation disorder Electrocaloric effect Strontium barium niobate Tetragonal tungsten bronze |
Publisher: | Elsevier Ltd. | Abstract: | We have investigated the electrocaloric properties of K+ and Na+ co-substituted Sr0.6Ba0.4Nb2O6 (SBN) ceramics using the indirect method. Tetragonal tungsten bronze (K0.5Na0.5)2x(Sr0.6Ba0.4)5-xNb10O30 (KNSBN) with x = 0.24 was synthesized using dual-step sintering. Despite the low amount, K+ and Na+ co-substitution resulted in normal ferroelectric behaviour, showing no significant shift in the dielectric maximum temperature of 111 °C with increasing frequency. Maximum electrocaloric temperature change (?T) of 0.3 K was observed at an electric field of 30 kV/cm (?E) yielding the largest electrocaloric responsivity (?T/?E) among SBN based ceramics. This relatively large value is in agreement with the larger pyroelectric coefficient of KNSBN compared to SBN based ceramics. © 2020 Elsevier B.V. | URI: | https://doi.org/10.1016/j.jallcom.2020.156132 https://hdl.handle.net/11147/7806 |
ISSN: | 0925-8388 |
| Appears in Collections: | Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection |
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|---|---|---|---|
| uncorrected_proof.pdf | 1.53 MB | Adobe PDF | View/Open |
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