Materials Science and Engineering
Journal or Book Title
Journal of the American Ceramic Society
The electrocaloric effect (ECE) is investigated through indirect measurement in two lead‐free [Bi1/2(Na,K)1/2]TiO3‐based ceramics that were previously reported to display giant electro‐strains. In the Nb‐doped ceramic, denoted as BNKT‐2.5Nb, a decent temperature change of ΔT=1.85 K and an electrocaloric responsivity of ΔT/ΔE=0.37 (10−6Km V−1) are found around room temperature (32°C). While in the Ta‐doped ceramic, BNKT‐1.5Ta, a wide operation temperature range (Tspan ~55 K) is observed near room temperature. Additional electrical measurements, as well as transmission electron microscopy experiments, are performed to identify the mechanisms of the ECE in both ceramics.
The American Ceramic Society
Fan, Zhongming; Liu, Xiaoming; and Tan, Xiaoli, "Large electrocaloric responses in [Bi1/2(Na,K)1/2]TiO3‐based ceramics with giant electro‐strains" (2017). Materials Science and Engineering Publications. 321.