Abstract
The solid-state reaction method is used to prepare the 0.94(Bi0.5Na0.5)TiO3–0.06BaTiO3 modified by WO3 lead-free ceramic. The unpoled (Bi0.5Na0.5)0.94Ba0.06Ti1−(3/2)x W x O3 with pseudo-cubic structure undergoes transition from ferroelectric to relaxor ferroelectric that happens in the T d. The maximum reversible temperature change |ΔT| = 0.8 K occurs at the room temperature due to the decline of temperature. In addition, |ΔT| = 0.15 K at the (Bi0.5Na0.5)0.94Ba0.06Ti1−(3/2)x W x O3 with x = 0.75 mol% exhibits good thermal stability at the temperature range of 303–413 K.
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Acknowledgments
This work was supported by the National Nature Science Foundation (51172187), the SPDRF (20116102130002, 20116102120016), the 111 Program (B08040) of MOE, the Xi’an Science and Technology Foundation (XBCL-1-08), the SKLP Foundation (KP201421, KP201523), the Project of Key Areas of Innovation team in Shaanxi Province (No. 2014KCT-12), the Fundamental Research Funds for the Central Universities (3102014JGL01002, 3102014JGY01004), and the Aeronautical Science Foundation of China (2013ZF53072).
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Wang, J., Li, Q., Ma, Y. et al. The electrocaloric effect and thermal stability of 0.94(Bi0.5Na0.5)TiO3–0.06BaTiO3 modified by WO3 . Appl. Phys. A 122, 517 (2016). https://doi.org/10.1007/s00339-016-0044-5
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DOI: https://doi.org/10.1007/s00339-016-0044-5